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[deliverable/linux.git] / drivers / video / omap2 / dss / dsi.c
1 /*
2 * linux/drivers/video/omap2/dss/dsi.c
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #define DSS_SUBSYS_NAME "DSI"
21
22 #include <linux/kernel.h>
23 #include <linux/io.h>
24 #include <linux/clk.h>
25 #include <linux/device.h>
26 #include <linux/err.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/mutex.h>
30 #include <linux/semaphore.h>
31 #include <linux/seq_file.h>
32 #include <linux/platform_device.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/wait.h>
35 #include <linux/workqueue.h>
36 #include <linux/sched.h>
37 #include <linux/slab.h>
38 #include <linux/debugfs.h>
39
40 #include <video/omapdss.h>
41 #include <plat/clock.h>
42
43 #include "dss.h"
44 #include "dss_features.h"
45
46 /*#define VERBOSE_IRQ*/
47 #define DSI_CATCH_MISSING_TE
48
49 struct dsi_reg { u16 idx; };
50
51 #define DSI_REG(idx) ((const struct dsi_reg) { idx })
52
53 #define DSI_SZ_REGS SZ_1K
54 /* DSI Protocol Engine */
55
56 #define DSI_REVISION DSI_REG(0x0000)
57 #define DSI_SYSCONFIG DSI_REG(0x0010)
58 #define DSI_SYSSTATUS DSI_REG(0x0014)
59 #define DSI_IRQSTATUS DSI_REG(0x0018)
60 #define DSI_IRQENABLE DSI_REG(0x001C)
61 #define DSI_CTRL DSI_REG(0x0040)
62 #define DSI_GNQ DSI_REG(0x0044)
63 #define DSI_COMPLEXIO_CFG1 DSI_REG(0x0048)
64 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(0x004C)
65 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(0x0050)
66 #define DSI_CLK_CTRL DSI_REG(0x0054)
67 #define DSI_TIMING1 DSI_REG(0x0058)
68 #define DSI_TIMING2 DSI_REG(0x005C)
69 #define DSI_VM_TIMING1 DSI_REG(0x0060)
70 #define DSI_VM_TIMING2 DSI_REG(0x0064)
71 #define DSI_VM_TIMING3 DSI_REG(0x0068)
72 #define DSI_CLK_TIMING DSI_REG(0x006C)
73 #define DSI_TX_FIFO_VC_SIZE DSI_REG(0x0070)
74 #define DSI_RX_FIFO_VC_SIZE DSI_REG(0x0074)
75 #define DSI_COMPLEXIO_CFG2 DSI_REG(0x0078)
76 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(0x007C)
77 #define DSI_VM_TIMING4 DSI_REG(0x0080)
78 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(0x0084)
79 #define DSI_VM_TIMING5 DSI_REG(0x0088)
80 #define DSI_VM_TIMING6 DSI_REG(0x008C)
81 #define DSI_VM_TIMING7 DSI_REG(0x0090)
82 #define DSI_STOPCLK_TIMING DSI_REG(0x0094)
83 #define DSI_VC_CTRL(n) DSI_REG(0x0100 + (n * 0x20))
84 #define DSI_VC_TE(n) DSI_REG(0x0104 + (n * 0x20))
85 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(0x0108 + (n * 0x20))
86 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(0x010C + (n * 0x20))
87 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(0x0110 + (n * 0x20))
88 #define DSI_VC_IRQSTATUS(n) DSI_REG(0x0118 + (n * 0x20))
89 #define DSI_VC_IRQENABLE(n) DSI_REG(0x011C + (n * 0x20))
90
91 /* DSIPHY_SCP */
92
93 #define DSI_DSIPHY_CFG0 DSI_REG(0x200 + 0x0000)
94 #define DSI_DSIPHY_CFG1 DSI_REG(0x200 + 0x0004)
95 #define DSI_DSIPHY_CFG2 DSI_REG(0x200 + 0x0008)
96 #define DSI_DSIPHY_CFG5 DSI_REG(0x200 + 0x0014)
97 #define DSI_DSIPHY_CFG10 DSI_REG(0x200 + 0x0028)
98
99 /* DSI_PLL_CTRL_SCP */
100
101 #define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000)
102 #define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004)
103 #define DSI_PLL_GO DSI_REG(0x300 + 0x0008)
104 #define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C)
105 #define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010)
106
107 #define REG_GET(dsidev, idx, start, end) \
108 FLD_GET(dsi_read_reg(dsidev, idx), start, end)
109
110 #define REG_FLD_MOD(dsidev, idx, val, start, end) \
111 dsi_write_reg(dsidev, idx, FLD_MOD(dsi_read_reg(dsidev, idx), val, start, end))
112
113 /* Global interrupts */
114 #define DSI_IRQ_VC0 (1 << 0)
115 #define DSI_IRQ_VC1 (1 << 1)
116 #define DSI_IRQ_VC2 (1 << 2)
117 #define DSI_IRQ_VC3 (1 << 3)
118 #define DSI_IRQ_WAKEUP (1 << 4)
119 #define DSI_IRQ_RESYNC (1 << 5)
120 #define DSI_IRQ_PLL_LOCK (1 << 7)
121 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
122 #define DSI_IRQ_PLL_RECALL (1 << 9)
123 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
124 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
125 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
126 #define DSI_IRQ_TE_TRIGGER (1 << 16)
127 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
128 #define DSI_IRQ_SYNC_LOST (1 << 18)
129 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
130 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
131 #define DSI_IRQ_ERROR_MASK \
132 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
133 DSI_IRQ_TA_TIMEOUT)
134 #define DSI_IRQ_CHANNEL_MASK 0xf
135
136 /* Virtual channel interrupts */
137 #define DSI_VC_IRQ_CS (1 << 0)
138 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
139 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
140 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
141 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
142 #define DSI_VC_IRQ_BTA (1 << 5)
143 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
144 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
145 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
146 #define DSI_VC_IRQ_ERROR_MASK \
147 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
148 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
149 DSI_VC_IRQ_FIFO_TX_UDF)
150
151 /* ComplexIO interrupts */
152 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
153 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
154 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
155 #define DSI_CIO_IRQ_ERRSYNCESC4 (1 << 3)
156 #define DSI_CIO_IRQ_ERRSYNCESC5 (1 << 4)
157 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
158 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
159 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
160 #define DSI_CIO_IRQ_ERRESC4 (1 << 8)
161 #define DSI_CIO_IRQ_ERRESC5 (1 << 9)
162 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
163 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
164 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
165 #define DSI_CIO_IRQ_ERRCONTROL4 (1 << 13)
166 #define DSI_CIO_IRQ_ERRCONTROL5 (1 << 14)
167 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
168 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
169 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
170 #define DSI_CIO_IRQ_STATEULPS4 (1 << 18)
171 #define DSI_CIO_IRQ_STATEULPS5 (1 << 19)
172 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
173 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
174 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
175 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
176 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
177 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
178 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_4 (1 << 26)
179 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_4 (1 << 27)
180 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_5 (1 << 28)
181 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_5 (1 << 29)
182 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
183 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
184 #define DSI_CIO_IRQ_ERROR_MASK \
185 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
186 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRSYNCESC4 | \
187 DSI_CIO_IRQ_ERRSYNCESC5 | \
188 DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
189 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRESC4 | \
190 DSI_CIO_IRQ_ERRESC5 | \
191 DSI_CIO_IRQ_ERRCONTROL1 | DSI_CIO_IRQ_ERRCONTROL2 | \
192 DSI_CIO_IRQ_ERRCONTROL3 | DSI_CIO_IRQ_ERRCONTROL4 | \
193 DSI_CIO_IRQ_ERRCONTROL5 | \
194 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
195 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
196 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3 | \
197 DSI_CIO_IRQ_ERRCONTENTIONLP0_4 | DSI_CIO_IRQ_ERRCONTENTIONLP1_4 | \
198 DSI_CIO_IRQ_ERRCONTENTIONLP0_5 | DSI_CIO_IRQ_ERRCONTENTIONLP1_5)
199
200 #define DSI_DT_DCS_SHORT_WRITE_0 0x05
201 #define DSI_DT_DCS_SHORT_WRITE_1 0x15
202 #define DSI_DT_DCS_READ 0x06
203 #define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
204 #define DSI_DT_NULL_PACKET 0x09
205 #define DSI_DT_DCS_LONG_WRITE 0x39
206
207 #define DSI_DT_RX_ACK_WITH_ERR 0x02
208 #define DSI_DT_RX_DCS_LONG_READ 0x1c
209 #define DSI_DT_RX_SHORT_READ_1 0x21
210 #define DSI_DT_RX_SHORT_READ_2 0x22
211
212 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
213
214 #define DSI_MAX_NR_ISRS 2
215
216 struct dsi_isr_data {
217 omap_dsi_isr_t isr;
218 void *arg;
219 u32 mask;
220 };
221
222 enum fifo_size {
223 DSI_FIFO_SIZE_0 = 0,
224 DSI_FIFO_SIZE_32 = 1,
225 DSI_FIFO_SIZE_64 = 2,
226 DSI_FIFO_SIZE_96 = 3,
227 DSI_FIFO_SIZE_128 = 4,
228 };
229
230 enum dsi_vc_mode {
231 DSI_VC_MODE_L4 = 0,
232 DSI_VC_MODE_VP,
233 };
234
235 enum dsi_lane {
236 DSI_CLK_P = 1 << 0,
237 DSI_CLK_N = 1 << 1,
238 DSI_DATA1_P = 1 << 2,
239 DSI_DATA1_N = 1 << 3,
240 DSI_DATA2_P = 1 << 4,
241 DSI_DATA2_N = 1 << 5,
242 DSI_DATA3_P = 1 << 6,
243 DSI_DATA3_N = 1 << 7,
244 DSI_DATA4_P = 1 << 8,
245 DSI_DATA4_N = 1 << 9,
246 };
247
248 struct dsi_update_region {
249 u16 x, y, w, h;
250 struct omap_dss_device *device;
251 };
252
253 struct dsi_irq_stats {
254 unsigned long last_reset;
255 unsigned irq_count;
256 unsigned dsi_irqs[32];
257 unsigned vc_irqs[4][32];
258 unsigned cio_irqs[32];
259 };
260
261 struct dsi_isr_tables {
262 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS];
263 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS];
264 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS];
265 };
266
267 struct dsi_data {
268 struct platform_device *pdev;
269 void __iomem *base;
270 int irq;
271
272 void (*dsi_mux_pads)(bool enable);
273
274 struct dsi_clock_info current_cinfo;
275
276 bool vdds_dsi_enabled;
277 struct regulator *vdds_dsi_reg;
278
279 struct {
280 enum dsi_vc_mode mode;
281 struct omap_dss_device *dssdev;
282 enum fifo_size fifo_size;
283 int vc_id;
284 } vc[4];
285
286 struct mutex lock;
287 struct semaphore bus_lock;
288
289 unsigned pll_locked;
290
291 spinlock_t irq_lock;
292 struct dsi_isr_tables isr_tables;
293 /* space for a copy used by the interrupt handler */
294 struct dsi_isr_tables isr_tables_copy;
295
296 int update_channel;
297 struct dsi_update_region update_region;
298
299 bool te_enabled;
300 bool ulps_enabled;
301
302 void (*framedone_callback)(int, void *);
303 void *framedone_data;
304
305 struct delayed_work framedone_timeout_work;
306
307 #ifdef DSI_CATCH_MISSING_TE
308 struct timer_list te_timer;
309 #endif
310
311 unsigned long cache_req_pck;
312 unsigned long cache_clk_freq;
313 struct dsi_clock_info cache_cinfo;
314
315 u32 errors;
316 spinlock_t errors_lock;
317 #ifdef DEBUG
318 ktime_t perf_setup_time;
319 ktime_t perf_start_time;
320 #endif
321 int debug_read;
322 int debug_write;
323
324 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
325 spinlock_t irq_stats_lock;
326 struct dsi_irq_stats irq_stats;
327 #endif
328 /* DSI PLL Parameter Ranges */
329 unsigned long regm_max, regn_max;
330 unsigned long regm_dispc_max, regm_dsi_max;
331 unsigned long fint_min, fint_max;
332 unsigned long lpdiv_max;
333
334 int num_data_lanes;
335
336 unsigned scp_clk_refcount;
337 };
338
339 struct dsi_packet_sent_handler_data {
340 struct platform_device *dsidev;
341 struct completion *completion;
342 };
343
344 static struct platform_device *dsi_pdev_map[MAX_NUM_DSI];
345
346 #ifdef DEBUG
347 static unsigned int dsi_perf;
348 module_param_named(dsi_perf, dsi_perf, bool, 0644);
349 #endif
350
351 static inline struct dsi_data *dsi_get_dsidrv_data(struct platform_device *dsidev)
352 {
353 return dev_get_drvdata(&dsidev->dev);
354 }
355
356 static inline struct platform_device *dsi_get_dsidev_from_dssdev(struct omap_dss_device *dssdev)
357 {
358 return dsi_pdev_map[dssdev->phy.dsi.module];
359 }
360
361 struct platform_device *dsi_get_dsidev_from_id(int module)
362 {
363 return dsi_pdev_map[module];
364 }
365
366 static int dsi_get_dsidev_id(struct platform_device *dsidev)
367 {
368 /* TEMP: Pass 0 as the dsi module index till the time the dsi platform
369 * device names aren't changed to the form "omapdss_dsi.0",
370 * "omapdss_dsi.1" and so on */
371 BUG_ON(dsidev->id != -1);
372
373 return 0;
374 }
375
376 static inline void dsi_write_reg(struct platform_device *dsidev,
377 const struct dsi_reg idx, u32 val)
378 {
379 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
380
381 __raw_writel(val, dsi->base + idx.idx);
382 }
383
384 static inline u32 dsi_read_reg(struct platform_device *dsidev,
385 const struct dsi_reg idx)
386 {
387 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
388
389 return __raw_readl(dsi->base + idx.idx);
390 }
391
392
393 void dsi_save_context(void)
394 {
395 }
396
397 void dsi_restore_context(void)
398 {
399 }
400
401 void dsi_bus_lock(struct omap_dss_device *dssdev)
402 {
403 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
404 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
405
406 down(&dsi->bus_lock);
407 }
408 EXPORT_SYMBOL(dsi_bus_lock);
409
410 void dsi_bus_unlock(struct omap_dss_device *dssdev)
411 {
412 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
413 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
414
415 up(&dsi->bus_lock);
416 }
417 EXPORT_SYMBOL(dsi_bus_unlock);
418
419 static bool dsi_bus_is_locked(struct platform_device *dsidev)
420 {
421 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
422
423 return dsi->bus_lock.count == 0;
424 }
425
426 static void dsi_completion_handler(void *data, u32 mask)
427 {
428 complete((struct completion *)data);
429 }
430
431 static inline int wait_for_bit_change(struct platform_device *dsidev,
432 const struct dsi_reg idx, int bitnum, int value)
433 {
434 int t = 100000;
435
436 while (REG_GET(dsidev, idx, bitnum, bitnum) != value) {
437 if (--t == 0)
438 return !value;
439 }
440
441 return value;
442 }
443
444 #ifdef DEBUG
445 static void dsi_perf_mark_setup(struct platform_device *dsidev)
446 {
447 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
448 dsi->perf_setup_time = ktime_get();
449 }
450
451 static void dsi_perf_mark_start(struct platform_device *dsidev)
452 {
453 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
454 dsi->perf_start_time = ktime_get();
455 }
456
457 static void dsi_perf_show(struct platform_device *dsidev, const char *name)
458 {
459 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
460 ktime_t t, setup_time, trans_time;
461 u32 total_bytes;
462 u32 setup_us, trans_us, total_us;
463
464 if (!dsi_perf)
465 return;
466
467 t = ktime_get();
468
469 setup_time = ktime_sub(dsi->perf_start_time, dsi->perf_setup_time);
470 setup_us = (u32)ktime_to_us(setup_time);
471 if (setup_us == 0)
472 setup_us = 1;
473
474 trans_time = ktime_sub(t, dsi->perf_start_time);
475 trans_us = (u32)ktime_to_us(trans_time);
476 if (trans_us == 0)
477 trans_us = 1;
478
479 total_us = setup_us + trans_us;
480
481 total_bytes = dsi->update_region.w *
482 dsi->update_region.h *
483 dsi->update_region.device->ctrl.pixel_size / 8;
484
485 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
486 "%u bytes, %u kbytes/sec\n",
487 name,
488 setup_us,
489 trans_us,
490 total_us,
491 1000*1000 / total_us,
492 total_bytes,
493 total_bytes * 1000 / total_us);
494 }
495 #else
496 #define dsi_perf_mark_setup(x)
497 #define dsi_perf_mark_start(x)
498 #define dsi_perf_show(x, y)
499 #endif
500
501 static void print_irq_status(u32 status)
502 {
503 if (status == 0)
504 return;
505
506 #ifndef VERBOSE_IRQ
507 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
508 return;
509 #endif
510 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
511
512 #define PIS(x) \
513 if (status & DSI_IRQ_##x) \
514 printk(#x " ");
515 #ifdef VERBOSE_IRQ
516 PIS(VC0);
517 PIS(VC1);
518 PIS(VC2);
519 PIS(VC3);
520 #endif
521 PIS(WAKEUP);
522 PIS(RESYNC);
523 PIS(PLL_LOCK);
524 PIS(PLL_UNLOCK);
525 PIS(PLL_RECALL);
526 PIS(COMPLEXIO_ERR);
527 PIS(HS_TX_TIMEOUT);
528 PIS(LP_RX_TIMEOUT);
529 PIS(TE_TRIGGER);
530 PIS(ACK_TRIGGER);
531 PIS(SYNC_LOST);
532 PIS(LDO_POWER_GOOD);
533 PIS(TA_TIMEOUT);
534 #undef PIS
535
536 printk("\n");
537 }
538
539 static void print_irq_status_vc(int channel, u32 status)
540 {
541 if (status == 0)
542 return;
543
544 #ifndef VERBOSE_IRQ
545 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
546 return;
547 #endif
548 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
549
550 #define PIS(x) \
551 if (status & DSI_VC_IRQ_##x) \
552 printk(#x " ");
553 PIS(CS);
554 PIS(ECC_CORR);
555 #ifdef VERBOSE_IRQ
556 PIS(PACKET_SENT);
557 #endif
558 PIS(FIFO_TX_OVF);
559 PIS(FIFO_RX_OVF);
560 PIS(BTA);
561 PIS(ECC_NO_CORR);
562 PIS(FIFO_TX_UDF);
563 PIS(PP_BUSY_CHANGE);
564 #undef PIS
565 printk("\n");
566 }
567
568 static void print_irq_status_cio(u32 status)
569 {
570 if (status == 0)
571 return;
572
573 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
574
575 #define PIS(x) \
576 if (status & DSI_CIO_IRQ_##x) \
577 printk(#x " ");
578 PIS(ERRSYNCESC1);
579 PIS(ERRSYNCESC2);
580 PIS(ERRSYNCESC3);
581 PIS(ERRESC1);
582 PIS(ERRESC2);
583 PIS(ERRESC3);
584 PIS(ERRCONTROL1);
585 PIS(ERRCONTROL2);
586 PIS(ERRCONTROL3);
587 PIS(STATEULPS1);
588 PIS(STATEULPS2);
589 PIS(STATEULPS3);
590 PIS(ERRCONTENTIONLP0_1);
591 PIS(ERRCONTENTIONLP1_1);
592 PIS(ERRCONTENTIONLP0_2);
593 PIS(ERRCONTENTIONLP1_2);
594 PIS(ERRCONTENTIONLP0_3);
595 PIS(ERRCONTENTIONLP1_3);
596 PIS(ULPSACTIVENOT_ALL0);
597 PIS(ULPSACTIVENOT_ALL1);
598 #undef PIS
599
600 printk("\n");
601 }
602
603 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
604 static void dsi_collect_irq_stats(struct platform_device *dsidev, u32 irqstatus,
605 u32 *vcstatus, u32 ciostatus)
606 {
607 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
608 int i;
609
610 spin_lock(&dsi->irq_stats_lock);
611
612 dsi->irq_stats.irq_count++;
613 dss_collect_irq_stats(irqstatus, dsi->irq_stats.dsi_irqs);
614
615 for (i = 0; i < 4; ++i)
616 dss_collect_irq_stats(vcstatus[i], dsi->irq_stats.vc_irqs[i]);
617
618 dss_collect_irq_stats(ciostatus, dsi->irq_stats.cio_irqs);
619
620 spin_unlock(&dsi->irq_stats_lock);
621 }
622 #else
623 #define dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus)
624 #endif
625
626 static int debug_irq;
627
628 static void dsi_handle_irq_errors(struct platform_device *dsidev, u32 irqstatus,
629 u32 *vcstatus, u32 ciostatus)
630 {
631 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
632 int i;
633
634 if (irqstatus & DSI_IRQ_ERROR_MASK) {
635 DSSERR("DSI error, irqstatus %x\n", irqstatus);
636 print_irq_status(irqstatus);
637 spin_lock(&dsi->errors_lock);
638 dsi->errors |= irqstatus & DSI_IRQ_ERROR_MASK;
639 spin_unlock(&dsi->errors_lock);
640 } else if (debug_irq) {
641 print_irq_status(irqstatus);
642 }
643
644 for (i = 0; i < 4; ++i) {
645 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
646 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
647 i, vcstatus[i]);
648 print_irq_status_vc(i, vcstatus[i]);
649 } else if (debug_irq) {
650 print_irq_status_vc(i, vcstatus[i]);
651 }
652 }
653
654 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
655 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
656 print_irq_status_cio(ciostatus);
657 } else if (debug_irq) {
658 print_irq_status_cio(ciostatus);
659 }
660 }
661
662 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
663 unsigned isr_array_size, u32 irqstatus)
664 {
665 struct dsi_isr_data *isr_data;
666 int i;
667
668 for (i = 0; i < isr_array_size; i++) {
669 isr_data = &isr_array[i];
670 if (isr_data->isr && isr_data->mask & irqstatus)
671 isr_data->isr(isr_data->arg, irqstatus);
672 }
673 }
674
675 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
676 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
677 {
678 int i;
679
680 dsi_call_isrs(isr_tables->isr_table,
681 ARRAY_SIZE(isr_tables->isr_table),
682 irqstatus);
683
684 for (i = 0; i < 4; ++i) {
685 if (vcstatus[i] == 0)
686 continue;
687 dsi_call_isrs(isr_tables->isr_table_vc[i],
688 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
689 vcstatus[i]);
690 }
691
692 if (ciostatus != 0)
693 dsi_call_isrs(isr_tables->isr_table_cio,
694 ARRAY_SIZE(isr_tables->isr_table_cio),
695 ciostatus);
696 }
697
698 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
699 {
700 struct platform_device *dsidev;
701 struct dsi_data *dsi;
702 u32 irqstatus, vcstatus[4], ciostatus;
703 int i;
704
705 dsidev = (struct platform_device *) arg;
706 dsi = dsi_get_dsidrv_data(dsidev);
707
708 spin_lock(&dsi->irq_lock);
709
710 irqstatus = dsi_read_reg(dsidev, DSI_IRQSTATUS);
711
712 /* IRQ is not for us */
713 if (!irqstatus) {
714 spin_unlock(&dsi->irq_lock);
715 return IRQ_NONE;
716 }
717
718 dsi_write_reg(dsidev, DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
719 /* flush posted write */
720 dsi_read_reg(dsidev, DSI_IRQSTATUS);
721
722 for (i = 0; i < 4; ++i) {
723 if ((irqstatus & (1 << i)) == 0) {
724 vcstatus[i] = 0;
725 continue;
726 }
727
728 vcstatus[i] = dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i));
729
730 dsi_write_reg(dsidev, DSI_VC_IRQSTATUS(i), vcstatus[i]);
731 /* flush posted write */
732 dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i));
733 }
734
735 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
736 ciostatus = dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS);
737
738 dsi_write_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
739 /* flush posted write */
740 dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS);
741 } else {
742 ciostatus = 0;
743 }
744
745 #ifdef DSI_CATCH_MISSING_TE
746 if (irqstatus & DSI_IRQ_TE_TRIGGER)
747 del_timer(&dsi->te_timer);
748 #endif
749
750 /* make a copy and unlock, so that isrs can unregister
751 * themselves */
752 memcpy(&dsi->isr_tables_copy, &dsi->isr_tables,
753 sizeof(dsi->isr_tables));
754
755 spin_unlock(&dsi->irq_lock);
756
757 dsi_handle_isrs(&dsi->isr_tables_copy, irqstatus, vcstatus, ciostatus);
758
759 dsi_handle_irq_errors(dsidev, irqstatus, vcstatus, ciostatus);
760
761 dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus);
762
763 return IRQ_HANDLED;
764 }
765
766 /* dsi->irq_lock has to be locked by the caller */
767 static void _omap_dsi_configure_irqs(struct platform_device *dsidev,
768 struct dsi_isr_data *isr_array,
769 unsigned isr_array_size, u32 default_mask,
770 const struct dsi_reg enable_reg,
771 const struct dsi_reg status_reg)
772 {
773 struct dsi_isr_data *isr_data;
774 u32 mask;
775 u32 old_mask;
776 int i;
777
778 mask = default_mask;
779
780 for (i = 0; i < isr_array_size; i++) {
781 isr_data = &isr_array[i];
782
783 if (isr_data->isr == NULL)
784 continue;
785
786 mask |= isr_data->mask;
787 }
788
789 old_mask = dsi_read_reg(dsidev, enable_reg);
790 /* clear the irqstatus for newly enabled irqs */
791 dsi_write_reg(dsidev, status_reg, (mask ^ old_mask) & mask);
792 dsi_write_reg(dsidev, enable_reg, mask);
793
794 /* flush posted writes */
795 dsi_read_reg(dsidev, enable_reg);
796 dsi_read_reg(dsidev, status_reg);
797 }
798
799 /* dsi->irq_lock has to be locked by the caller */
800 static void _omap_dsi_set_irqs(struct platform_device *dsidev)
801 {
802 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
803 u32 mask = DSI_IRQ_ERROR_MASK;
804 #ifdef DSI_CATCH_MISSING_TE
805 mask |= DSI_IRQ_TE_TRIGGER;
806 #endif
807 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table,
808 ARRAY_SIZE(dsi->isr_tables.isr_table), mask,
809 DSI_IRQENABLE, DSI_IRQSTATUS);
810 }
811
812 /* dsi->irq_lock has to be locked by the caller */
813 static void _omap_dsi_set_irqs_vc(struct platform_device *dsidev, int vc)
814 {
815 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
816
817 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_vc[vc],
818 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]),
819 DSI_VC_IRQ_ERROR_MASK,
820 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
821 }
822
823 /* dsi->irq_lock has to be locked by the caller */
824 static void _omap_dsi_set_irqs_cio(struct platform_device *dsidev)
825 {
826 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
827
828 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_cio,
829 ARRAY_SIZE(dsi->isr_tables.isr_table_cio),
830 DSI_CIO_IRQ_ERROR_MASK,
831 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
832 }
833
834 static void _dsi_initialize_irq(struct platform_device *dsidev)
835 {
836 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
837 unsigned long flags;
838 int vc;
839
840 spin_lock_irqsave(&dsi->irq_lock, flags);
841
842 memset(&dsi->isr_tables, 0, sizeof(dsi->isr_tables));
843
844 _omap_dsi_set_irqs(dsidev);
845 for (vc = 0; vc < 4; ++vc)
846 _omap_dsi_set_irqs_vc(dsidev, vc);
847 _omap_dsi_set_irqs_cio(dsidev);
848
849 spin_unlock_irqrestore(&dsi->irq_lock, flags);
850 }
851
852 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
853 struct dsi_isr_data *isr_array, unsigned isr_array_size)
854 {
855 struct dsi_isr_data *isr_data;
856 int free_idx;
857 int i;
858
859 BUG_ON(isr == NULL);
860
861 /* check for duplicate entry and find a free slot */
862 free_idx = -1;
863 for (i = 0; i < isr_array_size; i++) {
864 isr_data = &isr_array[i];
865
866 if (isr_data->isr == isr && isr_data->arg == arg &&
867 isr_data->mask == mask) {
868 return -EINVAL;
869 }
870
871 if (isr_data->isr == NULL && free_idx == -1)
872 free_idx = i;
873 }
874
875 if (free_idx == -1)
876 return -EBUSY;
877
878 isr_data = &isr_array[free_idx];
879 isr_data->isr = isr;
880 isr_data->arg = arg;
881 isr_data->mask = mask;
882
883 return 0;
884 }
885
886 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
887 struct dsi_isr_data *isr_array, unsigned isr_array_size)
888 {
889 struct dsi_isr_data *isr_data;
890 int i;
891
892 for (i = 0; i < isr_array_size; i++) {
893 isr_data = &isr_array[i];
894 if (isr_data->isr != isr || isr_data->arg != arg ||
895 isr_data->mask != mask)
896 continue;
897
898 isr_data->isr = NULL;
899 isr_data->arg = NULL;
900 isr_data->mask = 0;
901
902 return 0;
903 }
904
905 return -EINVAL;
906 }
907
908 static int dsi_register_isr(struct platform_device *dsidev, omap_dsi_isr_t isr,
909 void *arg, u32 mask)
910 {
911 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
912 unsigned long flags;
913 int r;
914
915 spin_lock_irqsave(&dsi->irq_lock, flags);
916
917 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table,
918 ARRAY_SIZE(dsi->isr_tables.isr_table));
919
920 if (r == 0)
921 _omap_dsi_set_irqs(dsidev);
922
923 spin_unlock_irqrestore(&dsi->irq_lock, flags);
924
925 return r;
926 }
927
928 static int dsi_unregister_isr(struct platform_device *dsidev,
929 omap_dsi_isr_t isr, void *arg, u32 mask)
930 {
931 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
932 unsigned long flags;
933 int r;
934
935 spin_lock_irqsave(&dsi->irq_lock, flags);
936
937 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table,
938 ARRAY_SIZE(dsi->isr_tables.isr_table));
939
940 if (r == 0)
941 _omap_dsi_set_irqs(dsidev);
942
943 spin_unlock_irqrestore(&dsi->irq_lock, flags);
944
945 return r;
946 }
947
948 static int dsi_register_isr_vc(struct platform_device *dsidev, int channel,
949 omap_dsi_isr_t isr, void *arg, u32 mask)
950 {
951 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
952 unsigned long flags;
953 int r;
954
955 spin_lock_irqsave(&dsi->irq_lock, flags);
956
957 r = _dsi_register_isr(isr, arg, mask,
958 dsi->isr_tables.isr_table_vc[channel],
959 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
960
961 if (r == 0)
962 _omap_dsi_set_irqs_vc(dsidev, channel);
963
964 spin_unlock_irqrestore(&dsi->irq_lock, flags);
965
966 return r;
967 }
968
969 static int dsi_unregister_isr_vc(struct platform_device *dsidev, int channel,
970 omap_dsi_isr_t isr, void *arg, u32 mask)
971 {
972 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
973 unsigned long flags;
974 int r;
975
976 spin_lock_irqsave(&dsi->irq_lock, flags);
977
978 r = _dsi_unregister_isr(isr, arg, mask,
979 dsi->isr_tables.isr_table_vc[channel],
980 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
981
982 if (r == 0)
983 _omap_dsi_set_irqs_vc(dsidev, channel);
984
985 spin_unlock_irqrestore(&dsi->irq_lock, flags);
986
987 return r;
988 }
989
990 static int dsi_register_isr_cio(struct platform_device *dsidev,
991 omap_dsi_isr_t isr, void *arg, u32 mask)
992 {
993 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
994 unsigned long flags;
995 int r;
996
997 spin_lock_irqsave(&dsi->irq_lock, flags);
998
999 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1000 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1001
1002 if (r == 0)
1003 _omap_dsi_set_irqs_cio(dsidev);
1004
1005 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1006
1007 return r;
1008 }
1009
1010 static int dsi_unregister_isr_cio(struct platform_device *dsidev,
1011 omap_dsi_isr_t isr, void *arg, u32 mask)
1012 {
1013 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1014 unsigned long flags;
1015 int r;
1016
1017 spin_lock_irqsave(&dsi->irq_lock, flags);
1018
1019 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio,
1020 ARRAY_SIZE(dsi->isr_tables.isr_table_cio));
1021
1022 if (r == 0)
1023 _omap_dsi_set_irqs_cio(dsidev);
1024
1025 spin_unlock_irqrestore(&dsi->irq_lock, flags);
1026
1027 return r;
1028 }
1029
1030 static u32 dsi_get_errors(struct platform_device *dsidev)
1031 {
1032 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1033 unsigned long flags;
1034 u32 e;
1035 spin_lock_irqsave(&dsi->errors_lock, flags);
1036 e = dsi->errors;
1037 dsi->errors = 0;
1038 spin_unlock_irqrestore(&dsi->errors_lock, flags);
1039 return e;
1040 }
1041
1042 /* DSI func clock. this could also be dsi_pll_hsdiv_dsi_clk */
1043 static inline void enable_clocks(bool enable)
1044 {
1045 if (enable)
1046 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
1047 else
1048 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
1049 }
1050
1051 /* source clock for DSI PLL. this could also be PCLKFREE */
1052 static inline void dsi_enable_pll_clock(struct platform_device *dsidev,
1053 bool enable)
1054 {
1055 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1056
1057 if (enable)
1058 dss_clk_enable(DSS_CLK_SYSCK);
1059 else
1060 dss_clk_disable(DSS_CLK_SYSCK);
1061
1062 if (enable && dsi->pll_locked) {
1063 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 1, 1) != 1)
1064 DSSERR("cannot lock PLL when enabling clocks\n");
1065 }
1066 }
1067
1068 #ifdef DEBUG
1069 static void _dsi_print_reset_status(struct platform_device *dsidev)
1070 {
1071 u32 l;
1072 int b0, b1, b2;
1073
1074 if (!dss_debug)
1075 return;
1076
1077 /* A dummy read using the SCP interface to any DSIPHY register is
1078 * required after DSIPHY reset to complete the reset of the DSI complex
1079 * I/O. */
1080 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
1081
1082 printk(KERN_DEBUG "DSI resets: ");
1083
1084 l = dsi_read_reg(dsidev, DSI_PLL_STATUS);
1085 printk("PLL (%d) ", FLD_GET(l, 0, 0));
1086
1087 l = dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1);
1088 printk("CIO (%d) ", FLD_GET(l, 29, 29));
1089
1090 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) {
1091 b0 = 28;
1092 b1 = 27;
1093 b2 = 26;
1094 } else {
1095 b0 = 24;
1096 b1 = 25;
1097 b2 = 26;
1098 }
1099
1100 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
1101 printk("PHY (%x%x%x, %d, %d, %d)\n",
1102 FLD_GET(l, b0, b0),
1103 FLD_GET(l, b1, b1),
1104 FLD_GET(l, b2, b2),
1105 FLD_GET(l, 29, 29),
1106 FLD_GET(l, 30, 30),
1107 FLD_GET(l, 31, 31));
1108 }
1109 #else
1110 #define _dsi_print_reset_status(x)
1111 #endif
1112
1113 static inline int dsi_if_enable(struct platform_device *dsidev, bool enable)
1114 {
1115 DSSDBG("dsi_if_enable(%d)\n", enable);
1116
1117 enable = enable ? 1 : 0;
1118 REG_FLD_MOD(dsidev, DSI_CTRL, enable, 0, 0); /* IF_EN */
1119
1120 if (wait_for_bit_change(dsidev, DSI_CTRL, 0, enable) != enable) {
1121 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
1122 return -EIO;
1123 }
1124
1125 return 0;
1126 }
1127
1128 unsigned long dsi_get_pll_hsdiv_dispc_rate(struct platform_device *dsidev)
1129 {
1130 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1131
1132 return dsi->current_cinfo.dsi_pll_hsdiv_dispc_clk;
1133 }
1134
1135 static unsigned long dsi_get_pll_hsdiv_dsi_rate(struct platform_device *dsidev)
1136 {
1137 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1138
1139 return dsi->current_cinfo.dsi_pll_hsdiv_dsi_clk;
1140 }
1141
1142 static unsigned long dsi_get_txbyteclkhs(struct platform_device *dsidev)
1143 {
1144 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1145
1146 return dsi->current_cinfo.clkin4ddr / 16;
1147 }
1148
1149 static unsigned long dsi_fclk_rate(struct platform_device *dsidev)
1150 {
1151 unsigned long r;
1152 int dsi_module = dsi_get_dsidev_id(dsidev);
1153
1154 if (dss_get_dsi_clk_source(dsi_module) == OMAP_DSS_CLK_SRC_FCK) {
1155 /* DSI FCLK source is DSS_CLK_FCK */
1156 r = dss_clk_get_rate(DSS_CLK_FCK);
1157 } else {
1158 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1159 r = dsi_get_pll_hsdiv_dsi_rate(dsidev);
1160 }
1161
1162 return r;
1163 }
1164
1165 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
1166 {
1167 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
1168 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1169 unsigned long dsi_fclk;
1170 unsigned lp_clk_div;
1171 unsigned long lp_clk;
1172
1173 lp_clk_div = dssdev->clocks.dsi.lp_clk_div;
1174
1175 if (lp_clk_div == 0 || lp_clk_div > dsi->lpdiv_max)
1176 return -EINVAL;
1177
1178 dsi_fclk = dsi_fclk_rate(dsidev);
1179
1180 lp_clk = dsi_fclk / 2 / lp_clk_div;
1181
1182 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1183 dsi->current_cinfo.lp_clk = lp_clk;
1184 dsi->current_cinfo.lp_clk_div = lp_clk_div;
1185
1186 /* LP_CLK_DIVISOR */
1187 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, lp_clk_div, 12, 0);
1188
1189 /* LP_RX_SYNCHRO_ENABLE */
1190 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0, 21, 21);
1191
1192 return 0;
1193 }
1194
1195 static void dsi_enable_scp_clk(struct platform_device *dsidev)
1196 {
1197 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1198
1199 if (dsi->scp_clk_refcount++ == 0)
1200 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */
1201 }
1202
1203 static void dsi_disable_scp_clk(struct platform_device *dsidev)
1204 {
1205 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1206
1207 WARN_ON(dsi->scp_clk_refcount == 0);
1208 if (--dsi->scp_clk_refcount == 0)
1209 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */
1210 }
1211
1212 enum dsi_pll_power_state {
1213 DSI_PLL_POWER_OFF = 0x0,
1214 DSI_PLL_POWER_ON_HSCLK = 0x1,
1215 DSI_PLL_POWER_ON_ALL = 0x2,
1216 DSI_PLL_POWER_ON_DIV = 0x3,
1217 };
1218
1219 static int dsi_pll_power(struct platform_device *dsidev,
1220 enum dsi_pll_power_state state)
1221 {
1222 int t = 0;
1223
1224 /* DSI-PLL power command 0x3 is not working */
1225 if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
1226 state == DSI_PLL_POWER_ON_DIV)
1227 state = DSI_PLL_POWER_ON_ALL;
1228
1229 /* PLL_PWR_CMD */
1230 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, state, 31, 30);
1231
1232 /* PLL_PWR_STATUS */
1233 while (FLD_GET(dsi_read_reg(dsidev, DSI_CLK_CTRL), 29, 28) != state) {
1234 if (++t > 1000) {
1235 DSSERR("Failed to set DSI PLL power mode to %d\n",
1236 state);
1237 return -ENODEV;
1238 }
1239 udelay(1);
1240 }
1241
1242 return 0;
1243 }
1244
1245 /* calculate clock rates using dividers in cinfo */
1246 static int dsi_calc_clock_rates(struct omap_dss_device *dssdev,
1247 struct dsi_clock_info *cinfo)
1248 {
1249 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
1250 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1251
1252 if (cinfo->regn == 0 || cinfo->regn > dsi->regn_max)
1253 return -EINVAL;
1254
1255 if (cinfo->regm == 0 || cinfo->regm > dsi->regm_max)
1256 return -EINVAL;
1257
1258 if (cinfo->regm_dispc > dsi->regm_dispc_max)
1259 return -EINVAL;
1260
1261 if (cinfo->regm_dsi > dsi->regm_dsi_max)
1262 return -EINVAL;
1263
1264 if (cinfo->use_sys_clk) {
1265 cinfo->clkin = dss_clk_get_rate(DSS_CLK_SYSCK);
1266 /* XXX it is unclear if highfreq should be used
1267 * with DSS_SYS_CLK source also */
1268 cinfo->highfreq = 0;
1269 } else {
1270 cinfo->clkin = dispc_pclk_rate(dssdev->manager->id);
1271
1272 if (cinfo->clkin < 32000000)
1273 cinfo->highfreq = 0;
1274 else
1275 cinfo->highfreq = 1;
1276 }
1277
1278 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
1279
1280 if (cinfo->fint > dsi->fint_max || cinfo->fint < dsi->fint_min)
1281 return -EINVAL;
1282
1283 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
1284
1285 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
1286 return -EINVAL;
1287
1288 if (cinfo->regm_dispc > 0)
1289 cinfo->dsi_pll_hsdiv_dispc_clk =
1290 cinfo->clkin4ddr / cinfo->regm_dispc;
1291 else
1292 cinfo->dsi_pll_hsdiv_dispc_clk = 0;
1293
1294 if (cinfo->regm_dsi > 0)
1295 cinfo->dsi_pll_hsdiv_dsi_clk =
1296 cinfo->clkin4ddr / cinfo->regm_dsi;
1297 else
1298 cinfo->dsi_pll_hsdiv_dsi_clk = 0;
1299
1300 return 0;
1301 }
1302
1303 int dsi_pll_calc_clock_div_pck(struct platform_device *dsidev, bool is_tft,
1304 unsigned long req_pck, struct dsi_clock_info *dsi_cinfo,
1305 struct dispc_clock_info *dispc_cinfo)
1306 {
1307 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1308 struct dsi_clock_info cur, best;
1309 struct dispc_clock_info best_dispc;
1310 int min_fck_per_pck;
1311 int match = 0;
1312 unsigned long dss_sys_clk, max_dss_fck;
1313
1314 dss_sys_clk = dss_clk_get_rate(DSS_CLK_SYSCK);
1315
1316 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
1317
1318 if (req_pck == dsi->cache_req_pck &&
1319 dsi->cache_cinfo.clkin == dss_sys_clk) {
1320 DSSDBG("DSI clock info found from cache\n");
1321 *dsi_cinfo = dsi->cache_cinfo;
1322 dispc_find_clk_divs(is_tft, req_pck,
1323 dsi_cinfo->dsi_pll_hsdiv_dispc_clk, dispc_cinfo);
1324 return 0;
1325 }
1326
1327 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
1328
1329 if (min_fck_per_pck &&
1330 req_pck * min_fck_per_pck > max_dss_fck) {
1331 DSSERR("Requested pixel clock not possible with the current "
1332 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
1333 "the constraint off.\n");
1334 min_fck_per_pck = 0;
1335 }
1336
1337 DSSDBG("dsi_pll_calc\n");
1338
1339 retry:
1340 memset(&best, 0, sizeof(best));
1341 memset(&best_dispc, 0, sizeof(best_dispc));
1342
1343 memset(&cur, 0, sizeof(cur));
1344 cur.clkin = dss_sys_clk;
1345 cur.use_sys_clk = 1;
1346 cur.highfreq = 0;
1347
1348 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
1349 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
1350 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
1351 for (cur.regn = 1; cur.regn < dsi->regn_max; ++cur.regn) {
1352 if (cur.highfreq == 0)
1353 cur.fint = cur.clkin / cur.regn;
1354 else
1355 cur.fint = cur.clkin / (2 * cur.regn);
1356
1357 if (cur.fint > dsi->fint_max || cur.fint < dsi->fint_min)
1358 continue;
1359
1360 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
1361 for (cur.regm = 1; cur.regm < dsi->regm_max; ++cur.regm) {
1362 unsigned long a, b;
1363
1364 a = 2 * cur.regm * (cur.clkin/1000);
1365 b = cur.regn * (cur.highfreq + 1);
1366 cur.clkin4ddr = a / b * 1000;
1367
1368 if (cur.clkin4ddr > 1800 * 1000 * 1000)
1369 break;
1370
1371 /* dsi_pll_hsdiv_dispc_clk(MHz) =
1372 * DSIPHY(MHz) / regm_dispc < 173MHz/186Mhz */
1373 for (cur.regm_dispc = 1; cur.regm_dispc <
1374 dsi->regm_dispc_max; ++cur.regm_dispc) {
1375 struct dispc_clock_info cur_dispc;
1376 cur.dsi_pll_hsdiv_dispc_clk =
1377 cur.clkin4ddr / cur.regm_dispc;
1378
1379 /* this will narrow down the search a bit,
1380 * but still give pixclocks below what was
1381 * requested */
1382 if (cur.dsi_pll_hsdiv_dispc_clk < req_pck)
1383 break;
1384
1385 if (cur.dsi_pll_hsdiv_dispc_clk > max_dss_fck)
1386 continue;
1387
1388 if (min_fck_per_pck &&
1389 cur.dsi_pll_hsdiv_dispc_clk <
1390 req_pck * min_fck_per_pck)
1391 continue;
1392
1393 match = 1;
1394
1395 dispc_find_clk_divs(is_tft, req_pck,
1396 cur.dsi_pll_hsdiv_dispc_clk,
1397 &cur_dispc);
1398
1399 if (abs(cur_dispc.pck - req_pck) <
1400 abs(best_dispc.pck - req_pck)) {
1401 best = cur;
1402 best_dispc = cur_dispc;
1403
1404 if (cur_dispc.pck == req_pck)
1405 goto found;
1406 }
1407 }
1408 }
1409 }
1410 found:
1411 if (!match) {
1412 if (min_fck_per_pck) {
1413 DSSERR("Could not find suitable clock settings.\n"
1414 "Turning FCK/PCK constraint off and"
1415 "trying again.\n");
1416 min_fck_per_pck = 0;
1417 goto retry;
1418 }
1419
1420 DSSERR("Could not find suitable clock settings.\n");
1421
1422 return -EINVAL;
1423 }
1424
1425 /* dsi_pll_hsdiv_dsi_clk (regm_dsi) is not used */
1426 best.regm_dsi = 0;
1427 best.dsi_pll_hsdiv_dsi_clk = 0;
1428
1429 if (dsi_cinfo)
1430 *dsi_cinfo = best;
1431 if (dispc_cinfo)
1432 *dispc_cinfo = best_dispc;
1433
1434 dsi->cache_req_pck = req_pck;
1435 dsi->cache_clk_freq = 0;
1436 dsi->cache_cinfo = best;
1437
1438 return 0;
1439 }
1440
1441 int dsi_pll_set_clock_div(struct platform_device *dsidev,
1442 struct dsi_clock_info *cinfo)
1443 {
1444 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1445 int r = 0;
1446 u32 l;
1447 int f = 0;
1448 u8 regn_start, regn_end, regm_start, regm_end;
1449 u8 regm_dispc_start, regm_dispc_end, regm_dsi_start, regm_dsi_end;
1450
1451 DSSDBGF();
1452
1453 dsi->current_cinfo.use_sys_clk = cinfo->use_sys_clk;
1454 dsi->current_cinfo.highfreq = cinfo->highfreq;
1455
1456 dsi->current_cinfo.fint = cinfo->fint;
1457 dsi->current_cinfo.clkin4ddr = cinfo->clkin4ddr;
1458 dsi->current_cinfo.dsi_pll_hsdiv_dispc_clk =
1459 cinfo->dsi_pll_hsdiv_dispc_clk;
1460 dsi->current_cinfo.dsi_pll_hsdiv_dsi_clk =
1461 cinfo->dsi_pll_hsdiv_dsi_clk;
1462
1463 dsi->current_cinfo.regn = cinfo->regn;
1464 dsi->current_cinfo.regm = cinfo->regm;
1465 dsi->current_cinfo.regm_dispc = cinfo->regm_dispc;
1466 dsi->current_cinfo.regm_dsi = cinfo->regm_dsi;
1467
1468 DSSDBG("DSI Fint %ld\n", cinfo->fint);
1469
1470 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
1471 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree",
1472 cinfo->clkin,
1473 cinfo->highfreq);
1474
1475 /* DSIPHY == CLKIN4DDR */
1476 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
1477 cinfo->regm,
1478 cinfo->regn,
1479 cinfo->clkin,
1480 cinfo->highfreq + 1,
1481 cinfo->clkin4ddr);
1482
1483 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1484 cinfo->clkin4ddr / 1000 / 1000 / 2);
1485
1486 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1487
1488 DSSDBG("regm_dispc = %d, %s (%s) = %lu\n", cinfo->regm_dispc,
1489 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1490 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1491 cinfo->dsi_pll_hsdiv_dispc_clk);
1492 DSSDBG("regm_dsi = %d, %s (%s) = %lu\n", cinfo->regm_dsi,
1493 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1494 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1495 cinfo->dsi_pll_hsdiv_dsi_clk);
1496
1497 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGN, &regn_start, &regn_end);
1498 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM, &regm_start, &regm_end);
1499 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DISPC, &regm_dispc_start,
1500 &regm_dispc_end);
1501 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DSI, &regm_dsi_start,
1502 &regm_dsi_end);
1503
1504 /* DSI_PLL_AUTOMODE = manual */
1505 REG_FLD_MOD(dsidev, DSI_PLL_CONTROL, 0, 0, 0);
1506
1507 l = dsi_read_reg(dsidev, DSI_PLL_CONFIGURATION1);
1508 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1509 /* DSI_PLL_REGN */
1510 l = FLD_MOD(l, cinfo->regn - 1, regn_start, regn_end);
1511 /* DSI_PLL_REGM */
1512 l = FLD_MOD(l, cinfo->regm, regm_start, regm_end);
1513 /* DSI_CLOCK_DIV */
1514 l = FLD_MOD(l, cinfo->regm_dispc > 0 ? cinfo->regm_dispc - 1 : 0,
1515 regm_dispc_start, regm_dispc_end);
1516 /* DSIPROTO_CLOCK_DIV */
1517 l = FLD_MOD(l, cinfo->regm_dsi > 0 ? cinfo->regm_dsi - 1 : 0,
1518 regm_dsi_start, regm_dsi_end);
1519 dsi_write_reg(dsidev, DSI_PLL_CONFIGURATION1, l);
1520
1521 BUG_ON(cinfo->fint < dsi->fint_min || cinfo->fint > dsi->fint_max);
1522
1523 if (dss_has_feature(FEAT_DSI_PLL_FREQSEL)) {
1524 f = cinfo->fint < 1000000 ? 0x3 :
1525 cinfo->fint < 1250000 ? 0x4 :
1526 cinfo->fint < 1500000 ? 0x5 :
1527 cinfo->fint < 1750000 ? 0x6 :
1528 0x7;
1529 }
1530
1531 l = dsi_read_reg(dsidev, DSI_PLL_CONFIGURATION2);
1532
1533 if (dss_has_feature(FEAT_DSI_PLL_FREQSEL))
1534 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1535 l = FLD_MOD(l, cinfo->use_sys_clk ? 0 : 1,
1536 11, 11); /* DSI_PLL_CLKSEL */
1537 l = FLD_MOD(l, cinfo->highfreq,
1538 12, 12); /* DSI_PLL_HIGHFREQ */
1539 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1540 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1541 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1542 dsi_write_reg(dsidev, DSI_PLL_CONFIGURATION2, l);
1543
1544 REG_FLD_MOD(dsidev, DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1545
1546 if (wait_for_bit_change(dsidev, DSI_PLL_GO, 0, 0) != 0) {
1547 DSSERR("dsi pll go bit not going down.\n");
1548 r = -EIO;
1549 goto err;
1550 }
1551
1552 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 1, 1) != 1) {
1553 DSSERR("cannot lock PLL\n");
1554 r = -EIO;
1555 goto err;
1556 }
1557
1558 dsi->pll_locked = 1;
1559
1560 l = dsi_read_reg(dsidev, DSI_PLL_CONFIGURATION2);
1561 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1562 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1563 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1564 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1565 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1566 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1567 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1568 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1569 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1570 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1571 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1572 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1573 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1574 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1575 dsi_write_reg(dsidev, DSI_PLL_CONFIGURATION2, l);
1576
1577 DSSDBG("PLL config done\n");
1578 err:
1579 return r;
1580 }
1581
1582 int dsi_pll_init(struct platform_device *dsidev, bool enable_hsclk,
1583 bool enable_hsdiv)
1584 {
1585 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1586 int r = 0;
1587 enum dsi_pll_power_state pwstate;
1588
1589 DSSDBG("PLL init\n");
1590
1591 if (dsi->vdds_dsi_reg == NULL) {
1592 struct regulator *vdds_dsi;
1593
1594 vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
1595
1596 if (IS_ERR(vdds_dsi)) {
1597 DSSERR("can't get VDDS_DSI regulator\n");
1598 return PTR_ERR(vdds_dsi);
1599 }
1600
1601 dsi->vdds_dsi_reg = vdds_dsi;
1602 }
1603
1604 enable_clocks(1);
1605 dsi_enable_pll_clock(dsidev, 1);
1606 /*
1607 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4.
1608 */
1609 dsi_enable_scp_clk(dsidev);
1610
1611 if (!dsi->vdds_dsi_enabled) {
1612 r = regulator_enable(dsi->vdds_dsi_reg);
1613 if (r)
1614 goto err0;
1615 dsi->vdds_dsi_enabled = true;
1616 }
1617
1618 /* XXX PLL does not come out of reset without this... */
1619 dispc_pck_free_enable(1);
1620
1621 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 0, 1) != 1) {
1622 DSSERR("PLL not coming out of reset.\n");
1623 r = -ENODEV;
1624 dispc_pck_free_enable(0);
1625 goto err1;
1626 }
1627
1628 /* XXX ... but if left on, we get problems when planes do not
1629 * fill the whole display. No idea about this */
1630 dispc_pck_free_enable(0);
1631
1632 if (enable_hsclk && enable_hsdiv)
1633 pwstate = DSI_PLL_POWER_ON_ALL;
1634 else if (enable_hsclk)
1635 pwstate = DSI_PLL_POWER_ON_HSCLK;
1636 else if (enable_hsdiv)
1637 pwstate = DSI_PLL_POWER_ON_DIV;
1638 else
1639 pwstate = DSI_PLL_POWER_OFF;
1640
1641 r = dsi_pll_power(dsidev, pwstate);
1642
1643 if (r)
1644 goto err1;
1645
1646 DSSDBG("PLL init done\n");
1647
1648 return 0;
1649 err1:
1650 if (dsi->vdds_dsi_enabled) {
1651 regulator_disable(dsi->vdds_dsi_reg);
1652 dsi->vdds_dsi_enabled = false;
1653 }
1654 err0:
1655 dsi_disable_scp_clk(dsidev);
1656 enable_clocks(0);
1657 dsi_enable_pll_clock(dsidev, 0);
1658 return r;
1659 }
1660
1661 void dsi_pll_uninit(struct platform_device *dsidev, bool disconnect_lanes)
1662 {
1663 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1664
1665 dsi->pll_locked = 0;
1666 dsi_pll_power(dsidev, DSI_PLL_POWER_OFF);
1667 if (disconnect_lanes) {
1668 WARN_ON(!dsi->vdds_dsi_enabled);
1669 regulator_disable(dsi->vdds_dsi_reg);
1670 dsi->vdds_dsi_enabled = false;
1671 }
1672
1673 dsi_disable_scp_clk(dsidev);
1674 enable_clocks(0);
1675 dsi_enable_pll_clock(dsidev, 0);
1676
1677 DSSDBG("PLL uninit done\n");
1678 }
1679
1680 static void dsi_dump_dsidev_clocks(struct platform_device *dsidev,
1681 struct seq_file *s)
1682 {
1683 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1684 struct dsi_clock_info *cinfo = &dsi->current_cinfo;
1685 enum omap_dss_clk_source dispc_clk_src, dsi_clk_src;
1686 int dsi_module = dsi_get_dsidev_id(dsidev);
1687
1688 dispc_clk_src = dss_get_dispc_clk_source();
1689 dsi_clk_src = dss_get_dsi_clk_source(dsi_module);
1690
1691 enable_clocks(1);
1692
1693 seq_printf(s, "- DSI%d PLL -\n", dsi_module + 1);
1694
1695 seq_printf(s, "dsi pll source = %s\n",
1696 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree");
1697
1698 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1699
1700 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1701 cinfo->clkin4ddr, cinfo->regm);
1702
1703 seq_printf(s, "%s (%s)\t%-16luregm_dispc %u\t(%s)\n",
1704 dss_get_generic_clk_source_name(dispc_clk_src),
1705 dss_feat_get_clk_source_name(dispc_clk_src),
1706 cinfo->dsi_pll_hsdiv_dispc_clk,
1707 cinfo->regm_dispc,
1708 dispc_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1709 "off" : "on");
1710
1711 seq_printf(s, "%s (%s)\t%-16luregm_dsi %u\t(%s)\n",
1712 dss_get_generic_clk_source_name(dsi_clk_src),
1713 dss_feat_get_clk_source_name(dsi_clk_src),
1714 cinfo->dsi_pll_hsdiv_dsi_clk,
1715 cinfo->regm_dsi,
1716 dsi_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1717 "off" : "on");
1718
1719 seq_printf(s, "- DSI%d -\n", dsi_module + 1);
1720
1721 seq_printf(s, "dsi fclk source = %s (%s)\n",
1722 dss_get_generic_clk_source_name(dsi_clk_src),
1723 dss_feat_get_clk_source_name(dsi_clk_src));
1724
1725 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate(dsidev));
1726
1727 seq_printf(s, "DDR_CLK\t\t%lu\n",
1728 cinfo->clkin4ddr / 4);
1729
1730 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs(dsidev));
1731
1732 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1733
1734 enable_clocks(0);
1735 }
1736
1737 void dsi_dump_clocks(struct seq_file *s)
1738 {
1739 struct platform_device *dsidev;
1740 int i;
1741
1742 for (i = 0; i < MAX_NUM_DSI; i++) {
1743 dsidev = dsi_get_dsidev_from_id(i);
1744 if (dsidev)
1745 dsi_dump_dsidev_clocks(dsidev, s);
1746 }
1747 }
1748
1749 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1750 static void dsi_dump_dsidev_irqs(struct platform_device *dsidev,
1751 struct seq_file *s)
1752 {
1753 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
1754 unsigned long flags;
1755 struct dsi_irq_stats stats;
1756 int dsi_module = dsi_get_dsidev_id(dsidev);
1757
1758 spin_lock_irqsave(&dsi->irq_stats_lock, flags);
1759
1760 stats = dsi->irq_stats;
1761 memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats));
1762 dsi->irq_stats.last_reset = jiffies;
1763
1764 spin_unlock_irqrestore(&dsi->irq_stats_lock, flags);
1765
1766 seq_printf(s, "period %u ms\n",
1767 jiffies_to_msecs(jiffies - stats.last_reset));
1768
1769 seq_printf(s, "irqs %d\n", stats.irq_count);
1770 #define PIS(x) \
1771 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1772
1773 seq_printf(s, "-- DSI%d interrupts --\n", dsi_module + 1);
1774 PIS(VC0);
1775 PIS(VC1);
1776 PIS(VC2);
1777 PIS(VC3);
1778 PIS(WAKEUP);
1779 PIS(RESYNC);
1780 PIS(PLL_LOCK);
1781 PIS(PLL_UNLOCK);
1782 PIS(PLL_RECALL);
1783 PIS(COMPLEXIO_ERR);
1784 PIS(HS_TX_TIMEOUT);
1785 PIS(LP_RX_TIMEOUT);
1786 PIS(TE_TRIGGER);
1787 PIS(ACK_TRIGGER);
1788 PIS(SYNC_LOST);
1789 PIS(LDO_POWER_GOOD);
1790 PIS(TA_TIMEOUT);
1791 #undef PIS
1792
1793 #define PIS(x) \
1794 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1795 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1796 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1797 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1798 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1799
1800 seq_printf(s, "-- VC interrupts --\n");
1801 PIS(CS);
1802 PIS(ECC_CORR);
1803 PIS(PACKET_SENT);
1804 PIS(FIFO_TX_OVF);
1805 PIS(FIFO_RX_OVF);
1806 PIS(BTA);
1807 PIS(ECC_NO_CORR);
1808 PIS(FIFO_TX_UDF);
1809 PIS(PP_BUSY_CHANGE);
1810 #undef PIS
1811
1812 #define PIS(x) \
1813 seq_printf(s, "%-20s %10d\n", #x, \
1814 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1815
1816 seq_printf(s, "-- CIO interrupts --\n");
1817 PIS(ERRSYNCESC1);
1818 PIS(ERRSYNCESC2);
1819 PIS(ERRSYNCESC3);
1820 PIS(ERRESC1);
1821 PIS(ERRESC2);
1822 PIS(ERRESC3);
1823 PIS(ERRCONTROL1);
1824 PIS(ERRCONTROL2);
1825 PIS(ERRCONTROL3);
1826 PIS(STATEULPS1);
1827 PIS(STATEULPS2);
1828 PIS(STATEULPS3);
1829 PIS(ERRCONTENTIONLP0_1);
1830 PIS(ERRCONTENTIONLP1_1);
1831 PIS(ERRCONTENTIONLP0_2);
1832 PIS(ERRCONTENTIONLP1_2);
1833 PIS(ERRCONTENTIONLP0_3);
1834 PIS(ERRCONTENTIONLP1_3);
1835 PIS(ULPSACTIVENOT_ALL0);
1836 PIS(ULPSACTIVENOT_ALL1);
1837 #undef PIS
1838 }
1839
1840 static void dsi1_dump_irqs(struct seq_file *s)
1841 {
1842 struct platform_device *dsidev = dsi_get_dsidev_from_id(0);
1843
1844 dsi_dump_dsidev_irqs(dsidev, s);
1845 }
1846
1847 static void dsi2_dump_irqs(struct seq_file *s)
1848 {
1849 struct platform_device *dsidev = dsi_get_dsidev_from_id(1);
1850
1851 dsi_dump_dsidev_irqs(dsidev, s);
1852 }
1853
1854 void dsi_create_debugfs_files_irq(struct dentry *debugfs_dir,
1855 const struct file_operations *debug_fops)
1856 {
1857 struct platform_device *dsidev;
1858
1859 dsidev = dsi_get_dsidev_from_id(0);
1860 if (dsidev)
1861 debugfs_create_file("dsi1_irqs", S_IRUGO, debugfs_dir,
1862 &dsi1_dump_irqs, debug_fops);
1863
1864 dsidev = dsi_get_dsidev_from_id(1);
1865 if (dsidev)
1866 debugfs_create_file("dsi2_irqs", S_IRUGO, debugfs_dir,
1867 &dsi2_dump_irqs, debug_fops);
1868 }
1869 #endif
1870
1871 static void dsi_dump_dsidev_regs(struct platform_device *dsidev,
1872 struct seq_file *s)
1873 {
1874 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(dsidev, r))
1875
1876 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
1877 dsi_enable_scp_clk(dsidev);
1878
1879 DUMPREG(DSI_REVISION);
1880 DUMPREG(DSI_SYSCONFIG);
1881 DUMPREG(DSI_SYSSTATUS);
1882 DUMPREG(DSI_IRQSTATUS);
1883 DUMPREG(DSI_IRQENABLE);
1884 DUMPREG(DSI_CTRL);
1885 DUMPREG(DSI_COMPLEXIO_CFG1);
1886 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1887 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1888 DUMPREG(DSI_CLK_CTRL);
1889 DUMPREG(DSI_TIMING1);
1890 DUMPREG(DSI_TIMING2);
1891 DUMPREG(DSI_VM_TIMING1);
1892 DUMPREG(DSI_VM_TIMING2);
1893 DUMPREG(DSI_VM_TIMING3);
1894 DUMPREG(DSI_CLK_TIMING);
1895 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1896 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1897 DUMPREG(DSI_COMPLEXIO_CFG2);
1898 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1899 DUMPREG(DSI_VM_TIMING4);
1900 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1901 DUMPREG(DSI_VM_TIMING5);
1902 DUMPREG(DSI_VM_TIMING6);
1903 DUMPREG(DSI_VM_TIMING7);
1904 DUMPREG(DSI_STOPCLK_TIMING);
1905
1906 DUMPREG(DSI_VC_CTRL(0));
1907 DUMPREG(DSI_VC_TE(0));
1908 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1909 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1910 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1911 DUMPREG(DSI_VC_IRQSTATUS(0));
1912 DUMPREG(DSI_VC_IRQENABLE(0));
1913
1914 DUMPREG(DSI_VC_CTRL(1));
1915 DUMPREG(DSI_VC_TE(1));
1916 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1917 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1918 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1919 DUMPREG(DSI_VC_IRQSTATUS(1));
1920 DUMPREG(DSI_VC_IRQENABLE(1));
1921
1922 DUMPREG(DSI_VC_CTRL(2));
1923 DUMPREG(DSI_VC_TE(2));
1924 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1925 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1926 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1927 DUMPREG(DSI_VC_IRQSTATUS(2));
1928 DUMPREG(DSI_VC_IRQENABLE(2));
1929
1930 DUMPREG(DSI_VC_CTRL(3));
1931 DUMPREG(DSI_VC_TE(3));
1932 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1933 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1934 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1935 DUMPREG(DSI_VC_IRQSTATUS(3));
1936 DUMPREG(DSI_VC_IRQENABLE(3));
1937
1938 DUMPREG(DSI_DSIPHY_CFG0);
1939 DUMPREG(DSI_DSIPHY_CFG1);
1940 DUMPREG(DSI_DSIPHY_CFG2);
1941 DUMPREG(DSI_DSIPHY_CFG5);
1942
1943 DUMPREG(DSI_PLL_CONTROL);
1944 DUMPREG(DSI_PLL_STATUS);
1945 DUMPREG(DSI_PLL_GO);
1946 DUMPREG(DSI_PLL_CONFIGURATION1);
1947 DUMPREG(DSI_PLL_CONFIGURATION2);
1948
1949 dsi_disable_scp_clk(dsidev);
1950 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
1951 #undef DUMPREG
1952 }
1953
1954 static void dsi1_dump_regs(struct seq_file *s)
1955 {
1956 struct platform_device *dsidev = dsi_get_dsidev_from_id(0);
1957
1958 dsi_dump_dsidev_regs(dsidev, s);
1959 }
1960
1961 static void dsi2_dump_regs(struct seq_file *s)
1962 {
1963 struct platform_device *dsidev = dsi_get_dsidev_from_id(1);
1964
1965 dsi_dump_dsidev_regs(dsidev, s);
1966 }
1967
1968 void dsi_create_debugfs_files_reg(struct dentry *debugfs_dir,
1969 const struct file_operations *debug_fops)
1970 {
1971 struct platform_device *dsidev;
1972
1973 dsidev = dsi_get_dsidev_from_id(0);
1974 if (dsidev)
1975 debugfs_create_file("dsi1_regs", S_IRUGO, debugfs_dir,
1976 &dsi1_dump_regs, debug_fops);
1977
1978 dsidev = dsi_get_dsidev_from_id(1);
1979 if (dsidev)
1980 debugfs_create_file("dsi2_regs", S_IRUGO, debugfs_dir,
1981 &dsi2_dump_regs, debug_fops);
1982 }
1983 enum dsi_cio_power_state {
1984 DSI_COMPLEXIO_POWER_OFF = 0x0,
1985 DSI_COMPLEXIO_POWER_ON = 0x1,
1986 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1987 };
1988
1989 static int dsi_cio_power(struct platform_device *dsidev,
1990 enum dsi_cio_power_state state)
1991 {
1992 int t = 0;
1993
1994 /* PWR_CMD */
1995 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG1, state, 28, 27);
1996
1997 /* PWR_STATUS */
1998 while (FLD_GET(dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1),
1999 26, 25) != state) {
2000 if (++t > 1000) {
2001 DSSERR("failed to set complexio power state to "
2002 "%d\n", state);
2003 return -ENODEV;
2004 }
2005 udelay(1);
2006 }
2007
2008 return 0;
2009 }
2010
2011 /* Number of data lanes present on DSI interface */
2012 static inline int dsi_get_num_data_lanes(struct platform_device *dsidev)
2013 {
2014 /* DSI on OMAP3 doesn't have register DSI_GNQ, set number
2015 * of data lanes as 2 by default */
2016 if (dss_has_feature(FEAT_DSI_GNQ))
2017 return REG_GET(dsidev, DSI_GNQ, 11, 9); /* NB_DATA_LANES */
2018 else
2019 return 2;
2020 }
2021
2022 /* Number of data lanes used by the dss device */
2023 static inline int dsi_get_num_data_lanes_dssdev(struct omap_dss_device *dssdev)
2024 {
2025 int num_data_lanes = 0;
2026
2027 if (dssdev->phy.dsi.data1_lane != 0)
2028 num_data_lanes++;
2029 if (dssdev->phy.dsi.data2_lane != 0)
2030 num_data_lanes++;
2031 if (dssdev->phy.dsi.data3_lane != 0)
2032 num_data_lanes++;
2033 if (dssdev->phy.dsi.data4_lane != 0)
2034 num_data_lanes++;
2035
2036 return num_data_lanes;
2037 }
2038
2039 static unsigned dsi_get_line_buf_size(struct platform_device *dsidev)
2040 {
2041 int val;
2042
2043 /* line buffer on OMAP3 is 1024 x 24bits */
2044 /* XXX: for some reason using full buffer size causes
2045 * considerable TX slowdown with update sizes that fill the
2046 * whole buffer */
2047 if (!dss_has_feature(FEAT_DSI_GNQ))
2048 return 1023 * 3;
2049
2050 val = REG_GET(dsidev, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */
2051
2052 switch (val) {
2053 case 1:
2054 return 512 * 3; /* 512x24 bits */
2055 case 2:
2056 return 682 * 3; /* 682x24 bits */
2057 case 3:
2058 return 853 * 3; /* 853x24 bits */
2059 case 4:
2060 return 1024 * 3; /* 1024x24 bits */
2061 case 5:
2062 return 1194 * 3; /* 1194x24 bits */
2063 case 6:
2064 return 1365 * 3; /* 1365x24 bits */
2065 default:
2066 BUG();
2067 }
2068 }
2069
2070 static void dsi_set_lane_config(struct omap_dss_device *dssdev)
2071 {
2072 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2073 u32 r;
2074 int num_data_lanes_dssdev = dsi_get_num_data_lanes_dssdev(dssdev);
2075
2076 int clk_lane = dssdev->phy.dsi.clk_lane;
2077 int data1_lane = dssdev->phy.dsi.data1_lane;
2078 int data2_lane = dssdev->phy.dsi.data2_lane;
2079 int clk_pol = dssdev->phy.dsi.clk_pol;
2080 int data1_pol = dssdev->phy.dsi.data1_pol;
2081 int data2_pol = dssdev->phy.dsi.data2_pol;
2082
2083 r = dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1);
2084 r = FLD_MOD(r, clk_lane, 2, 0);
2085 r = FLD_MOD(r, clk_pol, 3, 3);
2086 r = FLD_MOD(r, data1_lane, 6, 4);
2087 r = FLD_MOD(r, data1_pol, 7, 7);
2088 r = FLD_MOD(r, data2_lane, 10, 8);
2089 r = FLD_MOD(r, data2_pol, 11, 11);
2090 if (num_data_lanes_dssdev > 2) {
2091 int data3_lane = dssdev->phy.dsi.data3_lane;
2092 int data3_pol = dssdev->phy.dsi.data3_pol;
2093
2094 r = FLD_MOD(r, data3_lane, 14, 12);
2095 r = FLD_MOD(r, data3_pol, 15, 15);
2096 }
2097 if (num_data_lanes_dssdev > 3) {
2098 int data4_lane = dssdev->phy.dsi.data4_lane;
2099 int data4_pol = dssdev->phy.dsi.data4_pol;
2100
2101 r = FLD_MOD(r, data4_lane, 18, 16);
2102 r = FLD_MOD(r, data4_pol, 19, 19);
2103 }
2104 dsi_write_reg(dsidev, DSI_COMPLEXIO_CFG1, r);
2105
2106 /* The configuration of the DSI complex I/O (number of data lanes,
2107 position, differential order) should not be changed while
2108 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
2109 the hardware to take into account a new configuration of the complex
2110 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
2111 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
2112 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
2113 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
2114 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
2115 DSI complex I/O configuration is unknown. */
2116
2117 /*
2118 REG_FLD_MOD(dsidev, DSI_CTRL, 1, 0, 0);
2119 REG_FLD_MOD(dsidev, DSI_CTRL, 0, 0, 0);
2120 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 20, 20);
2121 REG_FLD_MOD(dsidev, DSI_CTRL, 1, 0, 0);
2122 */
2123 }
2124
2125 static inline unsigned ns2ddr(struct platform_device *dsidev, unsigned ns)
2126 {
2127 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2128
2129 /* convert time in ns to ddr ticks, rounding up */
2130 unsigned long ddr_clk = dsi->current_cinfo.clkin4ddr / 4;
2131 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
2132 }
2133
2134 static inline unsigned ddr2ns(struct platform_device *dsidev, unsigned ddr)
2135 {
2136 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2137
2138 unsigned long ddr_clk = dsi->current_cinfo.clkin4ddr / 4;
2139 return ddr * 1000 * 1000 / (ddr_clk / 1000);
2140 }
2141
2142 static void dsi_cio_timings(struct platform_device *dsidev)
2143 {
2144 u32 r;
2145 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
2146 u32 tlpx_half, tclk_trail, tclk_zero;
2147 u32 tclk_prepare;
2148
2149 /* calculate timings */
2150
2151 /* 1 * DDR_CLK = 2 * UI */
2152
2153 /* min 40ns + 4*UI max 85ns + 6*UI */
2154 ths_prepare = ns2ddr(dsidev, 70) + 2;
2155
2156 /* min 145ns + 10*UI */
2157 ths_prepare_ths_zero = ns2ddr(dsidev, 175) + 2;
2158
2159 /* min max(8*UI, 60ns+4*UI) */
2160 ths_trail = ns2ddr(dsidev, 60) + 5;
2161
2162 /* min 100ns */
2163 ths_exit = ns2ddr(dsidev, 145);
2164
2165 /* tlpx min 50n */
2166 tlpx_half = ns2ddr(dsidev, 25);
2167
2168 /* min 60ns */
2169 tclk_trail = ns2ddr(dsidev, 60) + 2;
2170
2171 /* min 38ns, max 95ns */
2172 tclk_prepare = ns2ddr(dsidev, 65);
2173
2174 /* min tclk-prepare + tclk-zero = 300ns */
2175 tclk_zero = ns2ddr(dsidev, 260);
2176
2177 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
2178 ths_prepare, ddr2ns(dsidev, ths_prepare),
2179 ths_prepare_ths_zero, ddr2ns(dsidev, ths_prepare_ths_zero));
2180 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
2181 ths_trail, ddr2ns(dsidev, ths_trail),
2182 ths_exit, ddr2ns(dsidev, ths_exit));
2183
2184 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
2185 "tclk_zero %u (%uns)\n",
2186 tlpx_half, ddr2ns(dsidev, tlpx_half),
2187 tclk_trail, ddr2ns(dsidev, tclk_trail),
2188 tclk_zero, ddr2ns(dsidev, tclk_zero));
2189 DSSDBG("tclk_prepare %u (%uns)\n",
2190 tclk_prepare, ddr2ns(dsidev, tclk_prepare));
2191
2192 /* program timings */
2193
2194 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
2195 r = FLD_MOD(r, ths_prepare, 31, 24);
2196 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
2197 r = FLD_MOD(r, ths_trail, 15, 8);
2198 r = FLD_MOD(r, ths_exit, 7, 0);
2199 dsi_write_reg(dsidev, DSI_DSIPHY_CFG0, r);
2200
2201 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
2202 r = FLD_MOD(r, tlpx_half, 22, 16);
2203 r = FLD_MOD(r, tclk_trail, 15, 8);
2204 r = FLD_MOD(r, tclk_zero, 7, 0);
2205 dsi_write_reg(dsidev, DSI_DSIPHY_CFG1, r);
2206
2207 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2);
2208 r = FLD_MOD(r, tclk_prepare, 7, 0);
2209 dsi_write_reg(dsidev, DSI_DSIPHY_CFG2, r);
2210 }
2211
2212 static void dsi_cio_enable_lane_override(struct omap_dss_device *dssdev,
2213 enum dsi_lane lanes)
2214 {
2215 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2216 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2217 int clk_lane = dssdev->phy.dsi.clk_lane;
2218 int data1_lane = dssdev->phy.dsi.data1_lane;
2219 int data2_lane = dssdev->phy.dsi.data2_lane;
2220 int data3_lane = dssdev->phy.dsi.data3_lane;
2221 int data4_lane = dssdev->phy.dsi.data4_lane;
2222 int clk_pol = dssdev->phy.dsi.clk_pol;
2223 int data1_pol = dssdev->phy.dsi.data1_pol;
2224 int data2_pol = dssdev->phy.dsi.data2_pol;
2225 int data3_pol = dssdev->phy.dsi.data3_pol;
2226 int data4_pol = dssdev->phy.dsi.data4_pol;
2227
2228 u32 l = 0;
2229 u8 lptxscp_start = dsi->num_data_lanes == 2 ? 22 : 26;
2230
2231 if (lanes & DSI_CLK_P)
2232 l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 0 : 1));
2233 if (lanes & DSI_CLK_N)
2234 l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 1 : 0));
2235
2236 if (lanes & DSI_DATA1_P)
2237 l |= 1 << ((data1_lane - 1) * 2 + (data1_pol ? 0 : 1));
2238 if (lanes & DSI_DATA1_N)
2239 l |= 1 << ((data1_lane - 1) * 2 + (data1_pol ? 1 : 0));
2240
2241 if (lanes & DSI_DATA2_P)
2242 l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 0 : 1));
2243 if (lanes & DSI_DATA2_N)
2244 l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 1 : 0));
2245
2246 if (lanes & DSI_DATA3_P)
2247 l |= 1 << ((data3_lane - 1) * 2 + (data3_pol ? 0 : 1));
2248 if (lanes & DSI_DATA3_N)
2249 l |= 1 << ((data3_lane - 1) * 2 + (data3_pol ? 1 : 0));
2250
2251 if (lanes & DSI_DATA4_P)
2252 l |= 1 << ((data4_lane - 1) * 2 + (data4_pol ? 0 : 1));
2253 if (lanes & DSI_DATA4_N)
2254 l |= 1 << ((data4_lane - 1) * 2 + (data4_pol ? 1 : 0));
2255 /*
2256 * Bits in REGLPTXSCPDAT4TO0DXDY:
2257 * 17: DY0 18: DX0
2258 * 19: DY1 20: DX1
2259 * 21: DY2 22: DX2
2260 * 23: DY3 24: DX3
2261 * 25: DY4 26: DX4
2262 */
2263
2264 /* Set the lane override configuration */
2265
2266 /* REGLPTXSCPDAT4TO0DXDY */
2267 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, l, lptxscp_start, 17);
2268
2269 /* Enable lane override */
2270
2271 /* ENLPTXSCPDAT */
2272 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 1, 27, 27);
2273 }
2274
2275 static void dsi_cio_disable_lane_override(struct platform_device *dsidev)
2276 {
2277 /* Disable lane override */
2278 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */
2279 /* Reset the lane override configuration */
2280 /* REGLPTXSCPDAT4TO0DXDY */
2281 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 22, 17);
2282 }
2283
2284 static int dsi_cio_wait_tx_clk_esc_reset(struct omap_dss_device *dssdev)
2285 {
2286 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2287 int t;
2288 int bits[3];
2289 bool in_use[3];
2290
2291 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) {
2292 bits[0] = 28;
2293 bits[1] = 27;
2294 bits[2] = 26;
2295 } else {
2296 bits[0] = 24;
2297 bits[1] = 25;
2298 bits[2] = 26;
2299 }
2300
2301 in_use[0] = false;
2302 in_use[1] = false;
2303 in_use[2] = false;
2304
2305 if (dssdev->phy.dsi.clk_lane != 0)
2306 in_use[dssdev->phy.dsi.clk_lane - 1] = true;
2307 if (dssdev->phy.dsi.data1_lane != 0)
2308 in_use[dssdev->phy.dsi.data1_lane - 1] = true;
2309 if (dssdev->phy.dsi.data2_lane != 0)
2310 in_use[dssdev->phy.dsi.data2_lane - 1] = true;
2311
2312 t = 100000;
2313 while (true) {
2314 u32 l;
2315 int i;
2316 int ok;
2317
2318 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
2319
2320 ok = 0;
2321 for (i = 0; i < 3; ++i) {
2322 if (!in_use[i] || (l & (1 << bits[i])))
2323 ok++;
2324 }
2325
2326 if (ok == 3)
2327 break;
2328
2329 if (--t == 0) {
2330 for (i = 0; i < 3; ++i) {
2331 if (!in_use[i] || (l & (1 << bits[i])))
2332 continue;
2333
2334 DSSERR("CIO TXCLKESC%d domain not coming " \
2335 "out of reset\n", i);
2336 }
2337 return -EIO;
2338 }
2339 }
2340
2341 return 0;
2342 }
2343
2344 static int dsi_cio_init(struct omap_dss_device *dssdev)
2345 {
2346 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2347 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2348 int r;
2349 int num_data_lanes_dssdev = dsi_get_num_data_lanes_dssdev(dssdev);
2350 u32 l;
2351
2352 DSSDBGF();
2353
2354 if (dsi->dsi_mux_pads)
2355 dsi->dsi_mux_pads(true);
2356
2357 dsi_enable_scp_clk(dsidev);
2358
2359 /* A dummy read using the SCP interface to any DSIPHY register is
2360 * required after DSIPHY reset to complete the reset of the DSI complex
2361 * I/O. */
2362 dsi_read_reg(dsidev, DSI_DSIPHY_CFG5);
2363
2364 if (wait_for_bit_change(dsidev, DSI_DSIPHY_CFG5, 30, 1) != 1) {
2365 DSSERR("CIO SCP Clock domain not coming out of reset.\n");
2366 r = -EIO;
2367 goto err_scp_clk_dom;
2368 }
2369
2370 dsi_set_lane_config(dssdev);
2371
2372 /* set TX STOP MODE timer to maximum for this operation */
2373 l = dsi_read_reg(dsidev, DSI_TIMING1);
2374 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2375 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
2376 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
2377 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
2378 dsi_write_reg(dsidev, DSI_TIMING1, l);
2379
2380 if (dsi->ulps_enabled) {
2381 u32 lane_mask = DSI_CLK_P | DSI_DATA1_P | DSI_DATA2_P;
2382
2383 DSSDBG("manual ulps exit\n");
2384
2385 /* ULPS is exited by Mark-1 state for 1ms, followed by
2386 * stop state. DSS HW cannot do this via the normal
2387 * ULPS exit sequence, as after reset the DSS HW thinks
2388 * that we are not in ULPS mode, and refuses to send the
2389 * sequence. So we need to send the ULPS exit sequence
2390 * manually.
2391 */
2392
2393 if (num_data_lanes_dssdev > 2)
2394 lane_mask |= DSI_DATA3_P;
2395
2396 if (num_data_lanes_dssdev > 3)
2397 lane_mask |= DSI_DATA4_P;
2398
2399 dsi_cio_enable_lane_override(dssdev, lane_mask);
2400 }
2401
2402 r = dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ON);
2403 if (r)
2404 goto err_cio_pwr;
2405
2406 if (wait_for_bit_change(dsidev, DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
2407 DSSERR("CIO PWR clock domain not coming out of reset.\n");
2408 r = -ENODEV;
2409 goto err_cio_pwr_dom;
2410 }
2411
2412 dsi_if_enable(dsidev, true);
2413 dsi_if_enable(dsidev, false);
2414 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
2415
2416 r = dsi_cio_wait_tx_clk_esc_reset(dssdev);
2417 if (r)
2418 goto err_tx_clk_esc_rst;
2419
2420 if (dsi->ulps_enabled) {
2421 /* Keep Mark-1 state for 1ms (as per DSI spec) */
2422 ktime_t wait = ns_to_ktime(1000 * 1000);
2423 set_current_state(TASK_UNINTERRUPTIBLE);
2424 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
2425
2426 /* Disable the override. The lanes should be set to Mark-11
2427 * state by the HW */
2428 dsi_cio_disable_lane_override(dsidev);
2429 }
2430
2431 /* FORCE_TX_STOP_MODE_IO */
2432 REG_FLD_MOD(dsidev, DSI_TIMING1, 0, 15, 15);
2433
2434 dsi_cio_timings(dsidev);
2435
2436 dsi->ulps_enabled = false;
2437
2438 DSSDBG("CIO init done\n");
2439
2440 return 0;
2441
2442 err_tx_clk_esc_rst:
2443 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 20, 20); /* LP_CLK_ENABLE */
2444 err_cio_pwr_dom:
2445 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF);
2446 err_cio_pwr:
2447 if (dsi->ulps_enabled)
2448 dsi_cio_disable_lane_override(dsidev);
2449 err_scp_clk_dom:
2450 dsi_disable_scp_clk(dsidev);
2451 if (dsi->dsi_mux_pads)
2452 dsi->dsi_mux_pads(false);
2453 return r;
2454 }
2455
2456 static void dsi_cio_uninit(struct platform_device *dsidev)
2457 {
2458 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2459
2460 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF);
2461 dsi_disable_scp_clk(dsidev);
2462 if (dsi->dsi_mux_pads)
2463 dsi->dsi_mux_pads(false);
2464 }
2465
2466 static int _dsi_wait_reset(struct platform_device *dsidev)
2467 {
2468 int t = 0;
2469
2470 while (REG_GET(dsidev, DSI_SYSSTATUS, 0, 0) == 0) {
2471 if (++t > 5) {
2472 DSSERR("soft reset failed\n");
2473 return -ENODEV;
2474 }
2475 udelay(1);
2476 }
2477
2478 return 0;
2479 }
2480
2481 static int _dsi_reset(struct platform_device *dsidev)
2482 {
2483 /* Soft reset */
2484 REG_FLD_MOD(dsidev, DSI_SYSCONFIG, 1, 1, 1);
2485 return _dsi_wait_reset(dsidev);
2486 }
2487
2488 static void dsi_config_tx_fifo(struct platform_device *dsidev,
2489 enum fifo_size size1, enum fifo_size size2,
2490 enum fifo_size size3, enum fifo_size size4)
2491 {
2492 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2493 u32 r = 0;
2494 int add = 0;
2495 int i;
2496
2497 dsi->vc[0].fifo_size = size1;
2498 dsi->vc[1].fifo_size = size2;
2499 dsi->vc[2].fifo_size = size3;
2500 dsi->vc[3].fifo_size = size4;
2501
2502 for (i = 0; i < 4; i++) {
2503 u8 v;
2504 int size = dsi->vc[i].fifo_size;
2505
2506 if (add + size > 4) {
2507 DSSERR("Illegal FIFO configuration\n");
2508 BUG();
2509 }
2510
2511 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2512 r |= v << (8 * i);
2513 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
2514 add += size;
2515 }
2516
2517 dsi_write_reg(dsidev, DSI_TX_FIFO_VC_SIZE, r);
2518 }
2519
2520 static void dsi_config_rx_fifo(struct platform_device *dsidev,
2521 enum fifo_size size1, enum fifo_size size2,
2522 enum fifo_size size3, enum fifo_size size4)
2523 {
2524 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2525 u32 r = 0;
2526 int add = 0;
2527 int i;
2528
2529 dsi->vc[0].fifo_size = size1;
2530 dsi->vc[1].fifo_size = size2;
2531 dsi->vc[2].fifo_size = size3;
2532 dsi->vc[3].fifo_size = size4;
2533
2534 for (i = 0; i < 4; i++) {
2535 u8 v;
2536 int size = dsi->vc[i].fifo_size;
2537
2538 if (add + size > 4) {
2539 DSSERR("Illegal FIFO configuration\n");
2540 BUG();
2541 }
2542
2543 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2544 r |= v << (8 * i);
2545 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2546 add += size;
2547 }
2548
2549 dsi_write_reg(dsidev, DSI_RX_FIFO_VC_SIZE, r);
2550 }
2551
2552 static int dsi_force_tx_stop_mode_io(struct platform_device *dsidev)
2553 {
2554 u32 r;
2555
2556 r = dsi_read_reg(dsidev, DSI_TIMING1);
2557 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2558 dsi_write_reg(dsidev, DSI_TIMING1, r);
2559
2560 if (wait_for_bit_change(dsidev, DSI_TIMING1, 15, 0) != 0) {
2561 DSSERR("TX_STOP bit not going down\n");
2562 return -EIO;
2563 }
2564
2565 return 0;
2566 }
2567
2568 static bool dsi_vc_is_enabled(struct platform_device *dsidev, int channel)
2569 {
2570 return REG_GET(dsidev, DSI_VC_CTRL(channel), 0, 0);
2571 }
2572
2573 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
2574 {
2575 struct dsi_packet_sent_handler_data *vp_data =
2576 (struct dsi_packet_sent_handler_data *) data;
2577 struct dsi_data *dsi = dsi_get_dsidrv_data(vp_data->dsidev);
2578 const int channel = dsi->update_channel;
2579 u8 bit = dsi->te_enabled ? 30 : 31;
2580
2581 if (REG_GET(vp_data->dsidev, DSI_VC_TE(channel), bit, bit) == 0)
2582 complete(vp_data->completion);
2583 }
2584
2585 static int dsi_sync_vc_vp(struct platform_device *dsidev, int channel)
2586 {
2587 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2588 DECLARE_COMPLETION_ONSTACK(completion);
2589 struct dsi_packet_sent_handler_data vp_data = { dsidev, &completion };
2590 int r = 0;
2591 u8 bit;
2592
2593 bit = dsi->te_enabled ? 30 : 31;
2594
2595 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2596 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2597 if (r)
2598 goto err0;
2599
2600 /* Wait for completion only if TE_EN/TE_START is still set */
2601 if (REG_GET(dsidev, DSI_VC_TE(channel), bit, bit)) {
2602 if (wait_for_completion_timeout(&completion,
2603 msecs_to_jiffies(10)) == 0) {
2604 DSSERR("Failed to complete previous frame transfer\n");
2605 r = -EIO;
2606 goto err1;
2607 }
2608 }
2609
2610 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2611 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2612
2613 return 0;
2614 err1:
2615 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp,
2616 &vp_data, DSI_VC_IRQ_PACKET_SENT);
2617 err0:
2618 return r;
2619 }
2620
2621 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
2622 {
2623 struct dsi_packet_sent_handler_data *l4_data =
2624 (struct dsi_packet_sent_handler_data *) data;
2625 struct dsi_data *dsi = dsi_get_dsidrv_data(l4_data->dsidev);
2626 const int channel = dsi->update_channel;
2627
2628 if (REG_GET(l4_data->dsidev, DSI_VC_CTRL(channel), 5, 5) == 0)
2629 complete(l4_data->completion);
2630 }
2631
2632 static int dsi_sync_vc_l4(struct platform_device *dsidev, int channel)
2633 {
2634 DECLARE_COMPLETION_ONSTACK(completion);
2635 struct dsi_packet_sent_handler_data l4_data = { dsidev, &completion };
2636 int r = 0;
2637
2638 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2639 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2640 if (r)
2641 goto err0;
2642
2643 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
2644 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 5, 5)) {
2645 if (wait_for_completion_timeout(&completion,
2646 msecs_to_jiffies(10)) == 0) {
2647 DSSERR("Failed to complete previous l4 transfer\n");
2648 r = -EIO;
2649 goto err1;
2650 }
2651 }
2652
2653 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2654 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2655
2656 return 0;
2657 err1:
2658 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4,
2659 &l4_data, DSI_VC_IRQ_PACKET_SENT);
2660 err0:
2661 return r;
2662 }
2663
2664 static int dsi_sync_vc(struct platform_device *dsidev, int channel)
2665 {
2666 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2667
2668 WARN_ON(!dsi_bus_is_locked(dsidev));
2669
2670 WARN_ON(in_interrupt());
2671
2672 if (!dsi_vc_is_enabled(dsidev, channel))
2673 return 0;
2674
2675 switch (dsi->vc[channel].mode) {
2676 case DSI_VC_MODE_VP:
2677 return dsi_sync_vc_vp(dsidev, channel);
2678 case DSI_VC_MODE_L4:
2679 return dsi_sync_vc_l4(dsidev, channel);
2680 default:
2681 BUG();
2682 }
2683 }
2684
2685 static int dsi_vc_enable(struct platform_device *dsidev, int channel,
2686 bool enable)
2687 {
2688 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2689 channel, enable);
2690
2691 enable = enable ? 1 : 0;
2692
2693 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 0, 0);
2694
2695 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel),
2696 0, enable) != enable) {
2697 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2698 return -EIO;
2699 }
2700
2701 return 0;
2702 }
2703
2704 static void dsi_vc_initial_config(struct platform_device *dsidev, int channel)
2705 {
2706 u32 r;
2707
2708 DSSDBGF("%d", channel);
2709
2710 r = dsi_read_reg(dsidev, DSI_VC_CTRL(channel));
2711
2712 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2713 DSSERR("VC(%d) busy when trying to configure it!\n",
2714 channel);
2715
2716 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2717 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2718 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2719 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2720 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2721 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2722 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2723 if (dss_has_feature(FEAT_DSI_VC_OCP_WIDTH))
2724 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
2725
2726 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2727 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2728
2729 dsi_write_reg(dsidev, DSI_VC_CTRL(channel), r);
2730 }
2731
2732 static int dsi_vc_config_l4(struct platform_device *dsidev, int channel)
2733 {
2734 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2735
2736 if (dsi->vc[channel].mode == DSI_VC_MODE_L4)
2737 return 0;
2738
2739 DSSDBGF("%d", channel);
2740
2741 dsi_sync_vc(dsidev, channel);
2742
2743 dsi_vc_enable(dsidev, channel, 0);
2744
2745 /* VC_BUSY */
2746 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel), 15, 0) != 0) {
2747 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
2748 return -EIO;
2749 }
2750
2751 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
2752
2753 /* DCS_CMD_ENABLE */
2754 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC))
2755 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 0, 30, 30);
2756
2757 dsi_vc_enable(dsidev, channel, 1);
2758
2759 dsi->vc[channel].mode = DSI_VC_MODE_L4;
2760
2761 return 0;
2762 }
2763
2764 static int dsi_vc_config_vp(struct platform_device *dsidev, int channel)
2765 {
2766 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2767
2768 if (dsi->vc[channel].mode == DSI_VC_MODE_VP)
2769 return 0;
2770
2771 DSSDBGF("%d", channel);
2772
2773 dsi_sync_vc(dsidev, channel);
2774
2775 dsi_vc_enable(dsidev, channel, 0);
2776
2777 /* VC_BUSY */
2778 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel), 15, 0) != 0) {
2779 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2780 return -EIO;
2781 }
2782
2783 /* SOURCE, 1 = video port */
2784 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 1, 1);
2785
2786 /* DCS_CMD_ENABLE */
2787 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC))
2788 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 30, 30);
2789
2790 dsi_vc_enable(dsidev, channel, 1);
2791
2792 dsi->vc[channel].mode = DSI_VC_MODE_VP;
2793
2794 return 0;
2795 }
2796
2797
2798 void omapdss_dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
2799 bool enable)
2800 {
2801 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2802
2803 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2804
2805 WARN_ON(!dsi_bus_is_locked(dsidev));
2806
2807 dsi_vc_enable(dsidev, channel, 0);
2808 dsi_if_enable(dsidev, 0);
2809
2810 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 9, 9);
2811
2812 dsi_vc_enable(dsidev, channel, 1);
2813 dsi_if_enable(dsidev, 1);
2814
2815 dsi_force_tx_stop_mode_io(dsidev);
2816 }
2817 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
2818
2819 static void dsi_vc_flush_long_data(struct platform_device *dsidev, int channel)
2820 {
2821 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2822 u32 val;
2823 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2824 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2825 (val >> 0) & 0xff,
2826 (val >> 8) & 0xff,
2827 (val >> 16) & 0xff,
2828 (val >> 24) & 0xff);
2829 }
2830 }
2831
2832 static void dsi_show_rx_ack_with_err(u16 err)
2833 {
2834 DSSERR("\tACK with ERROR (%#x):\n", err);
2835 if (err & (1 << 0))
2836 DSSERR("\t\tSoT Error\n");
2837 if (err & (1 << 1))
2838 DSSERR("\t\tSoT Sync Error\n");
2839 if (err & (1 << 2))
2840 DSSERR("\t\tEoT Sync Error\n");
2841 if (err & (1 << 3))
2842 DSSERR("\t\tEscape Mode Entry Command Error\n");
2843 if (err & (1 << 4))
2844 DSSERR("\t\tLP Transmit Sync Error\n");
2845 if (err & (1 << 5))
2846 DSSERR("\t\tHS Receive Timeout Error\n");
2847 if (err & (1 << 6))
2848 DSSERR("\t\tFalse Control Error\n");
2849 if (err & (1 << 7))
2850 DSSERR("\t\t(reserved7)\n");
2851 if (err & (1 << 8))
2852 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2853 if (err & (1 << 9))
2854 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2855 if (err & (1 << 10))
2856 DSSERR("\t\tChecksum Error\n");
2857 if (err & (1 << 11))
2858 DSSERR("\t\tData type not recognized\n");
2859 if (err & (1 << 12))
2860 DSSERR("\t\tInvalid VC ID\n");
2861 if (err & (1 << 13))
2862 DSSERR("\t\tInvalid Transmission Length\n");
2863 if (err & (1 << 14))
2864 DSSERR("\t\t(reserved14)\n");
2865 if (err & (1 << 15))
2866 DSSERR("\t\tDSI Protocol Violation\n");
2867 }
2868
2869 static u16 dsi_vc_flush_receive_data(struct platform_device *dsidev,
2870 int channel)
2871 {
2872 /* RX_FIFO_NOT_EMPTY */
2873 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2874 u32 val;
2875 u8 dt;
2876 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
2877 DSSERR("\trawval %#08x\n", val);
2878 dt = FLD_GET(val, 5, 0);
2879 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2880 u16 err = FLD_GET(val, 23, 8);
2881 dsi_show_rx_ack_with_err(err);
2882 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2883 DSSERR("\tDCS short response, 1 byte: %#x\n",
2884 FLD_GET(val, 23, 8));
2885 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2886 DSSERR("\tDCS short response, 2 byte: %#x\n",
2887 FLD_GET(val, 23, 8));
2888 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2889 DSSERR("\tDCS long response, len %d\n",
2890 FLD_GET(val, 23, 8));
2891 dsi_vc_flush_long_data(dsidev, channel);
2892 } else {
2893 DSSERR("\tunknown datatype 0x%02x\n", dt);
2894 }
2895 }
2896 return 0;
2897 }
2898
2899 static int dsi_vc_send_bta(struct platform_device *dsidev, int channel)
2900 {
2901 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2902
2903 if (dsi->debug_write || dsi->debug_read)
2904 DSSDBG("dsi_vc_send_bta %d\n", channel);
2905
2906 WARN_ON(!dsi_bus_is_locked(dsidev));
2907
2908 /* RX_FIFO_NOT_EMPTY */
2909 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
2910 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2911 dsi_vc_flush_receive_data(dsidev, channel);
2912 }
2913
2914 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2915
2916 return 0;
2917 }
2918
2919 int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int channel)
2920 {
2921 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
2922 DECLARE_COMPLETION_ONSTACK(completion);
2923 int r = 0;
2924 u32 err;
2925
2926 r = dsi_register_isr_vc(dsidev, channel, dsi_completion_handler,
2927 &completion, DSI_VC_IRQ_BTA);
2928 if (r)
2929 goto err0;
2930
2931 r = dsi_register_isr(dsidev, dsi_completion_handler, &completion,
2932 DSI_IRQ_ERROR_MASK);
2933 if (r)
2934 goto err1;
2935
2936 r = dsi_vc_send_bta(dsidev, channel);
2937 if (r)
2938 goto err2;
2939
2940 if (wait_for_completion_timeout(&completion,
2941 msecs_to_jiffies(500)) == 0) {
2942 DSSERR("Failed to receive BTA\n");
2943 r = -EIO;
2944 goto err2;
2945 }
2946
2947 err = dsi_get_errors(dsidev);
2948 if (err) {
2949 DSSERR("Error while sending BTA: %x\n", err);
2950 r = -EIO;
2951 goto err2;
2952 }
2953 err2:
2954 dsi_unregister_isr(dsidev, dsi_completion_handler, &completion,
2955 DSI_IRQ_ERROR_MASK);
2956 err1:
2957 dsi_unregister_isr_vc(dsidev, channel, dsi_completion_handler,
2958 &completion, DSI_VC_IRQ_BTA);
2959 err0:
2960 return r;
2961 }
2962 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
2963
2964 static inline void dsi_vc_write_long_header(struct platform_device *dsidev,
2965 int channel, u8 data_type, u16 len, u8 ecc)
2966 {
2967 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2968 u32 val;
2969 u8 data_id;
2970
2971 WARN_ON(!dsi_bus_is_locked(dsidev));
2972
2973 data_id = data_type | dsi->vc[channel].vc_id << 6;
2974
2975 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2976 FLD_VAL(ecc, 31, 24);
2977
2978 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_HEADER(channel), val);
2979 }
2980
2981 static inline void dsi_vc_write_long_payload(struct platform_device *dsidev,
2982 int channel, u8 b1, u8 b2, u8 b3, u8 b4)
2983 {
2984 u32 val;
2985
2986 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2987
2988 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2989 b1, b2, b3, b4, val); */
2990
2991 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2992 }
2993
2994 static int dsi_vc_send_long(struct platform_device *dsidev, int channel,
2995 u8 data_type, u8 *data, u16 len, u8 ecc)
2996 {
2997 /*u32 val; */
2998 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
2999 int i;
3000 u8 *p;
3001 int r = 0;
3002 u8 b1, b2, b3, b4;
3003
3004 if (dsi->debug_write)
3005 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
3006
3007 /* len + header */
3008 if (dsi->vc[channel].fifo_size * 32 * 4 < len + 4) {
3009 DSSERR("unable to send long packet: packet too long.\n");
3010 return -EINVAL;
3011 }
3012
3013 dsi_vc_config_l4(dsidev, channel);
3014
3015 dsi_vc_write_long_header(dsidev, channel, data_type, len, ecc);
3016
3017 p = data;
3018 for (i = 0; i < len >> 2; i++) {
3019 if (dsi->debug_write)
3020 DSSDBG("\tsending full packet %d\n", i);
3021
3022 b1 = *p++;
3023 b2 = *p++;
3024 b3 = *p++;
3025 b4 = *p++;
3026
3027 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, b4);
3028 }
3029
3030 i = len % 4;
3031 if (i) {
3032 b1 = 0; b2 = 0; b3 = 0;
3033
3034 if (dsi->debug_write)
3035 DSSDBG("\tsending remainder bytes %d\n", i);
3036
3037 switch (i) {
3038 case 3:
3039 b1 = *p++;
3040 b2 = *p++;
3041 b3 = *p++;
3042 break;
3043 case 2:
3044 b1 = *p++;
3045 b2 = *p++;
3046 break;
3047 case 1:
3048 b1 = *p++;
3049 break;
3050 }
3051
3052 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, 0);
3053 }
3054
3055 return r;
3056 }
3057
3058 static int dsi_vc_send_short(struct platform_device *dsidev, int channel,
3059 u8 data_type, u16 data, u8 ecc)
3060 {
3061 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3062 u32 r;
3063 u8 data_id;
3064
3065 WARN_ON(!dsi_bus_is_locked(dsidev));
3066
3067 if (dsi->debug_write)
3068 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
3069 channel,
3070 data_type, data & 0xff, (data >> 8) & 0xff);
3071
3072 dsi_vc_config_l4(dsidev, channel);
3073
3074 if (FLD_GET(dsi_read_reg(dsidev, DSI_VC_CTRL(channel)), 16, 16)) {
3075 DSSERR("ERROR FIFO FULL, aborting transfer\n");
3076 return -EINVAL;
3077 }
3078
3079 data_id = data_type | dsi->vc[channel].vc_id << 6;
3080
3081 r = (data_id << 0) | (data << 8) | (ecc << 24);
3082
3083 dsi_write_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel), r);
3084
3085 return 0;
3086 }
3087
3088 int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel)
3089 {
3090 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3091 u8 nullpkg[] = {0, 0, 0, 0};
3092
3093 return dsi_vc_send_long(dsidev, channel, DSI_DT_NULL_PACKET, nullpkg,
3094 4, 0);
3095 }
3096 EXPORT_SYMBOL(dsi_vc_send_null);
3097
3098 int dsi_vc_dcs_write_nosync(struct omap_dss_device *dssdev, int channel,
3099 u8 *data, int len)
3100 {
3101 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3102 int r;
3103
3104 BUG_ON(len == 0);
3105
3106 if (len == 1) {
3107 r = dsi_vc_send_short(dsidev, channel, DSI_DT_DCS_SHORT_WRITE_0,
3108 data[0], 0);
3109 } else if (len == 2) {
3110 r = dsi_vc_send_short(dsidev, channel, DSI_DT_DCS_SHORT_WRITE_1,
3111 data[0] | (data[1] << 8), 0);
3112 } else {
3113 /* 0x39 = DCS Long Write */
3114 r = dsi_vc_send_long(dsidev, channel, DSI_DT_DCS_LONG_WRITE,
3115 data, len, 0);
3116 }
3117
3118 return r;
3119 }
3120 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
3121
3122 int dsi_vc_dcs_write(struct omap_dss_device *dssdev, int channel, u8 *data,
3123 int len)
3124 {
3125 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3126 int r;
3127
3128 r = dsi_vc_dcs_write_nosync(dssdev, channel, data, len);
3129 if (r)
3130 goto err;
3131
3132 r = dsi_vc_send_bta_sync(dssdev, channel);
3133 if (r)
3134 goto err;
3135
3136 /* RX_FIFO_NOT_EMPTY */
3137 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) {
3138 DSSERR("rx fifo not empty after write, dumping data:\n");
3139 dsi_vc_flush_receive_data(dsidev, channel);
3140 r = -EIO;
3141 goto err;
3142 }
3143
3144 return 0;
3145 err:
3146 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
3147 channel, data[0], len);
3148 return r;
3149 }
3150 EXPORT_SYMBOL(dsi_vc_dcs_write);
3151
3152 int dsi_vc_dcs_write_0(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd)
3153 {
3154 return dsi_vc_dcs_write(dssdev, channel, &dcs_cmd, 1);
3155 }
3156 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
3157
3158 int dsi_vc_dcs_write_1(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3159 u8 param)
3160 {
3161 u8 buf[2];
3162 buf[0] = dcs_cmd;
3163 buf[1] = param;
3164 return dsi_vc_dcs_write(dssdev, channel, buf, 2);
3165 }
3166 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
3167
3168 int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3169 u8 *buf, int buflen)
3170 {
3171 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3172 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3173 u32 val;
3174 u8 dt;
3175 int r;
3176
3177 if (dsi->debug_read)
3178 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
3179
3180 r = dsi_vc_send_short(dsidev, channel, DSI_DT_DCS_READ, dcs_cmd, 0);
3181 if (r)
3182 goto err;
3183
3184 r = dsi_vc_send_bta_sync(dssdev, channel);
3185 if (r)
3186 goto err;
3187
3188 /* RX_FIFO_NOT_EMPTY */
3189 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20) == 0) {
3190 DSSERR("RX fifo empty when trying to read.\n");
3191 r = -EIO;
3192 goto err;
3193 }
3194
3195 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel));
3196 if (dsi->debug_read)
3197 DSSDBG("\theader: %08x\n", val);
3198 dt = FLD_GET(val, 5, 0);
3199 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
3200 u16 err = FLD_GET(val, 23, 8);
3201 dsi_show_rx_ack_with_err(err);
3202 r = -EIO;
3203 goto err;
3204
3205 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
3206 u8 data = FLD_GET(val, 15, 8);
3207 if (dsi->debug_read)
3208 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
3209
3210 if (buflen < 1) {
3211 r = -EIO;
3212 goto err;
3213 }
3214
3215 buf[0] = data;
3216
3217 return 1;
3218 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
3219 u16 data = FLD_GET(val, 23, 8);
3220 if (dsi->debug_read)
3221 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
3222
3223 if (buflen < 2) {
3224 r = -EIO;
3225 goto err;
3226 }
3227
3228 buf[0] = data & 0xff;
3229 buf[1] = (data >> 8) & 0xff;
3230
3231 return 2;
3232 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
3233 int w;
3234 int len = FLD_GET(val, 23, 8);
3235 if (dsi->debug_read)
3236 DSSDBG("\tDCS long response, len %d\n", len);
3237
3238 if (len > buflen) {
3239 r = -EIO;
3240 goto err;
3241 }
3242
3243 /* two byte checksum ends the packet, not included in len */
3244 for (w = 0; w < len + 2;) {
3245 int b;
3246 val = dsi_read_reg(dsidev,
3247 DSI_VC_SHORT_PACKET_HEADER(channel));
3248 if (dsi->debug_read)
3249 DSSDBG("\t\t%02x %02x %02x %02x\n",
3250 (val >> 0) & 0xff,
3251 (val >> 8) & 0xff,
3252 (val >> 16) & 0xff,
3253 (val >> 24) & 0xff);
3254
3255 for (b = 0; b < 4; ++b) {
3256 if (w < len)
3257 buf[w] = (val >> (b * 8)) & 0xff;
3258 /* we discard the 2 byte checksum */
3259 ++w;
3260 }
3261 }
3262
3263 return len;
3264 } else {
3265 DSSERR("\tunknown datatype 0x%02x\n", dt);
3266 r = -EIO;
3267 goto err;
3268 }
3269
3270 BUG();
3271 err:
3272 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
3273 channel, dcs_cmd);
3274 return r;
3275
3276 }
3277 EXPORT_SYMBOL(dsi_vc_dcs_read);
3278
3279 int dsi_vc_dcs_read_1(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3280 u8 *data)
3281 {
3282 int r;
3283
3284 r = dsi_vc_dcs_read(dssdev, channel, dcs_cmd, data, 1);
3285
3286 if (r < 0)
3287 return r;
3288
3289 if (r != 1)
3290 return -EIO;
3291
3292 return 0;
3293 }
3294 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
3295
3296 int dsi_vc_dcs_read_2(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd,
3297 u8 *data1, u8 *data2)
3298 {
3299 u8 buf[2];
3300 int r;
3301
3302 r = dsi_vc_dcs_read(dssdev, channel, dcs_cmd, buf, 2);
3303
3304 if (r < 0)
3305 return r;
3306
3307 if (r != 2)
3308 return -EIO;
3309
3310 *data1 = buf[0];
3311 *data2 = buf[1];
3312
3313 return 0;
3314 }
3315 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
3316
3317 int dsi_vc_set_max_rx_packet_size(struct omap_dss_device *dssdev, int channel,
3318 u16 len)
3319 {
3320 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3321
3322 return dsi_vc_send_short(dsidev, channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
3323 len, 0);
3324 }
3325 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
3326
3327 static int dsi_enter_ulps(struct platform_device *dsidev)
3328 {
3329 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3330 DECLARE_COMPLETION_ONSTACK(completion);
3331 int r;
3332
3333 DSSDBGF();
3334
3335 WARN_ON(!dsi_bus_is_locked(dsidev));
3336
3337 WARN_ON(dsi->ulps_enabled);
3338
3339 if (dsi->ulps_enabled)
3340 return 0;
3341
3342 if (REG_GET(dsidev, DSI_CLK_CTRL, 13, 13)) {
3343 DSSERR("DDR_CLK_ALWAYS_ON enabled when entering ULPS\n");
3344 return -EIO;
3345 }
3346
3347 dsi_sync_vc(dsidev, 0);
3348 dsi_sync_vc(dsidev, 1);
3349 dsi_sync_vc(dsidev, 2);
3350 dsi_sync_vc(dsidev, 3);
3351
3352 dsi_force_tx_stop_mode_io(dsidev);
3353
3354 dsi_vc_enable(dsidev, 0, false);
3355 dsi_vc_enable(dsidev, 1, false);
3356 dsi_vc_enable(dsidev, 2, false);
3357 dsi_vc_enable(dsidev, 3, false);
3358
3359 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */
3360 DSSERR("HS busy when enabling ULPS\n");
3361 return -EIO;
3362 }
3363
3364 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */
3365 DSSERR("LP busy when enabling ULPS\n");
3366 return -EIO;
3367 }
3368
3369 r = dsi_register_isr_cio(dsidev, dsi_completion_handler, &completion,
3370 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3371 if (r)
3372 return r;
3373
3374 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */
3375 /* LANEx_ULPS_SIG2 */
3376 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, (1 << 0) | (1 << 1) | (1 << 2),
3377 7, 5);
3378
3379 if (wait_for_completion_timeout(&completion,
3380 msecs_to_jiffies(1000)) == 0) {
3381 DSSERR("ULPS enable timeout\n");
3382 r = -EIO;
3383 goto err;
3384 }
3385
3386 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
3387 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3388
3389 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS);
3390
3391 dsi_if_enable(dsidev, false);
3392
3393 dsi->ulps_enabled = true;
3394
3395 return 0;
3396
3397 err:
3398 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion,
3399 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
3400 return r;
3401 }
3402
3403 static void dsi_set_lp_rx_timeout(struct platform_device *dsidev,
3404 unsigned ticks, bool x4, bool x16)
3405 {
3406 unsigned long fck;
3407 unsigned long total_ticks;
3408 u32 r;
3409
3410 BUG_ON(ticks > 0x1fff);
3411
3412 /* ticks in DSI_FCK */
3413 fck = dsi_fclk_rate(dsidev);
3414
3415 r = dsi_read_reg(dsidev, DSI_TIMING2);
3416 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
3417 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
3418 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
3419 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
3420 dsi_write_reg(dsidev, DSI_TIMING2, r);
3421
3422 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3423
3424 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3425 total_ticks,
3426 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3427 (total_ticks * 1000) / (fck / 1000 / 1000));
3428 }
3429
3430 static void dsi_set_ta_timeout(struct platform_device *dsidev, unsigned ticks,
3431 bool x8, bool x16)
3432 {
3433 unsigned long fck;
3434 unsigned long total_ticks;
3435 u32 r;
3436
3437 BUG_ON(ticks > 0x1fff);
3438
3439 /* ticks in DSI_FCK */
3440 fck = dsi_fclk_rate(dsidev);
3441
3442 r = dsi_read_reg(dsidev, DSI_TIMING1);
3443 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
3444 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
3445 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
3446 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
3447 dsi_write_reg(dsidev, DSI_TIMING1, r);
3448
3449 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
3450
3451 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
3452 total_ticks,
3453 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
3454 (total_ticks * 1000) / (fck / 1000 / 1000));
3455 }
3456
3457 static void dsi_set_stop_state_counter(struct platform_device *dsidev,
3458 unsigned ticks, bool x4, bool x16)
3459 {
3460 unsigned long fck;
3461 unsigned long total_ticks;
3462 u32 r;
3463
3464 BUG_ON(ticks > 0x1fff);
3465
3466 /* ticks in DSI_FCK */
3467 fck = dsi_fclk_rate(dsidev);
3468
3469 r = dsi_read_reg(dsidev, DSI_TIMING1);
3470 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
3471 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
3472 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
3473 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
3474 dsi_write_reg(dsidev, DSI_TIMING1, r);
3475
3476 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3477
3478 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
3479 total_ticks,
3480 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3481 (total_ticks * 1000) / (fck / 1000 / 1000));
3482 }
3483
3484 static void dsi_set_hs_tx_timeout(struct platform_device *dsidev,
3485 unsigned ticks, bool x4, bool x16)
3486 {
3487 unsigned long fck;
3488 unsigned long total_ticks;
3489 u32 r;
3490
3491 BUG_ON(ticks > 0x1fff);
3492
3493 /* ticks in TxByteClkHS */
3494 fck = dsi_get_txbyteclkhs(dsidev);
3495
3496 r = dsi_read_reg(dsidev, DSI_TIMING2);
3497 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
3498 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
3499 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
3500 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
3501 dsi_write_reg(dsidev, DSI_TIMING2, r);
3502
3503 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3504
3505 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3506 total_ticks,
3507 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3508 (total_ticks * 1000) / (fck / 1000 / 1000));
3509 }
3510 static int dsi_proto_config(struct omap_dss_device *dssdev)
3511 {
3512 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3513 u32 r;
3514 int buswidth = 0;
3515
3516 dsi_config_tx_fifo(dsidev, DSI_FIFO_SIZE_32,
3517 DSI_FIFO_SIZE_32,
3518 DSI_FIFO_SIZE_32,
3519 DSI_FIFO_SIZE_32);
3520
3521 dsi_config_rx_fifo(dsidev, DSI_FIFO_SIZE_32,
3522 DSI_FIFO_SIZE_32,
3523 DSI_FIFO_SIZE_32,
3524 DSI_FIFO_SIZE_32);
3525
3526 /* XXX what values for the timeouts? */
3527 dsi_set_stop_state_counter(dsidev, 0x1000, false, false);
3528 dsi_set_ta_timeout(dsidev, 0x1fff, true, true);
3529 dsi_set_lp_rx_timeout(dsidev, 0x1fff, true, true);
3530 dsi_set_hs_tx_timeout(dsidev, 0x1fff, true, true);
3531
3532 switch (dssdev->ctrl.pixel_size) {
3533 case 16:
3534 buswidth = 0;
3535 break;
3536 case 18:
3537 buswidth = 1;
3538 break;
3539 case 24:
3540 buswidth = 2;
3541 break;
3542 default:
3543 BUG();
3544 }
3545
3546 r = dsi_read_reg(dsidev, DSI_CTRL);
3547 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
3548 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
3549 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
3550 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
3551 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
3552 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
3553 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
3554 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
3555 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
3556 if (!dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
3557 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
3558 /* DCS_CMD_CODE, 1=start, 0=continue */
3559 r = FLD_MOD(r, 0, 25, 25);
3560 }
3561
3562 dsi_write_reg(dsidev, DSI_CTRL, r);
3563
3564 dsi_vc_initial_config(dsidev, 0);
3565 dsi_vc_initial_config(dsidev, 1);
3566 dsi_vc_initial_config(dsidev, 2);
3567 dsi_vc_initial_config(dsidev, 3);
3568
3569 return 0;
3570 }
3571
3572 static void dsi_proto_timings(struct omap_dss_device *dssdev)
3573 {
3574 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3575 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
3576 unsigned tclk_pre, tclk_post;
3577 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
3578 unsigned ths_trail, ths_exit;
3579 unsigned ddr_clk_pre, ddr_clk_post;
3580 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
3581 unsigned ths_eot;
3582 u32 r;
3583
3584 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0);
3585 ths_prepare = FLD_GET(r, 31, 24);
3586 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
3587 ths_zero = ths_prepare_ths_zero - ths_prepare;
3588 ths_trail = FLD_GET(r, 15, 8);
3589 ths_exit = FLD_GET(r, 7, 0);
3590
3591 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1);
3592 tlpx = FLD_GET(r, 22, 16) * 2;
3593 tclk_trail = FLD_GET(r, 15, 8);
3594 tclk_zero = FLD_GET(r, 7, 0);
3595
3596 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2);
3597 tclk_prepare = FLD_GET(r, 7, 0);
3598
3599 /* min 8*UI */
3600 tclk_pre = 20;
3601 /* min 60ns + 52*UI */
3602 tclk_post = ns2ddr(dsidev, 60) + 26;
3603
3604 ths_eot = DIV_ROUND_UP(4, dsi_get_num_data_lanes_dssdev(dssdev));
3605
3606 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
3607 4);
3608 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
3609
3610 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
3611 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
3612
3613 r = dsi_read_reg(dsidev, DSI_CLK_TIMING);
3614 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
3615 r = FLD_MOD(r, ddr_clk_post, 7, 0);
3616 dsi_write_reg(dsidev, DSI_CLK_TIMING, r);
3617
3618 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
3619 ddr_clk_pre,
3620 ddr_clk_post);
3621
3622 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
3623 DIV_ROUND_UP(ths_prepare, 4) +
3624 DIV_ROUND_UP(ths_zero + 3, 4);
3625
3626 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
3627
3628 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
3629 FLD_VAL(exit_hs_mode_lat, 15, 0);
3630 dsi_write_reg(dsidev, DSI_VM_TIMING7, r);
3631
3632 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
3633 enter_hs_mode_lat, exit_hs_mode_lat);
3634 }
3635
3636
3637 #define DSI_DECL_VARS \
3638 int __dsi_cb = 0; u32 __dsi_cv = 0;
3639
3640 #define DSI_FLUSH(dsidev, ch) \
3641 if (__dsi_cb > 0) { \
3642 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
3643 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
3644 __dsi_cb = __dsi_cv = 0; \
3645 }
3646
3647 #define DSI_PUSH(dsidev, ch, data) \
3648 do { \
3649 __dsi_cv |= (data) << (__dsi_cb * 8); \
3650 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
3651 if (++__dsi_cb > 3) \
3652 DSI_FLUSH(dsidev, ch); \
3653 } while (0)
3654
3655 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
3656 int x, int y, int w, int h)
3657 {
3658 /* Note: supports only 24bit colors in 32bit container */
3659 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3660 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3661 int first = 1;
3662 int fifo_stalls = 0;
3663 int max_dsi_packet_size;
3664 int max_data_per_packet;
3665 int max_pixels_per_packet;
3666 int pixels_left;
3667 int bytespp = dssdev->ctrl.pixel_size / 8;
3668 int scr_width;
3669 u32 __iomem *data;
3670 int start_offset;
3671 int horiz_inc;
3672 int current_x;
3673 struct omap_overlay *ovl;
3674
3675 debug_irq = 0;
3676
3677 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
3678 x, y, w, h);
3679
3680 ovl = dssdev->manager->overlays[0];
3681
3682 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
3683 return -EINVAL;
3684
3685 if (dssdev->ctrl.pixel_size != 24)
3686 return -EINVAL;
3687
3688 scr_width = ovl->info.screen_width;
3689 data = ovl->info.vaddr;
3690
3691 start_offset = scr_width * y + x;
3692 horiz_inc = scr_width - w;
3693 current_x = x;
3694
3695 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
3696 * in fifo */
3697
3698 /* When using CPU, max long packet size is TX buffer size */
3699 max_dsi_packet_size = dsi->vc[0].fifo_size * 32 * 4;
3700
3701 /* we seem to get better perf if we divide the tx fifo to half,
3702 and while the other half is being sent, we fill the other half
3703 max_dsi_packet_size /= 2; */
3704
3705 max_data_per_packet = max_dsi_packet_size - 4 - 1;
3706
3707 max_pixels_per_packet = max_data_per_packet / bytespp;
3708
3709 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
3710
3711 pixels_left = w * h;
3712
3713 DSSDBG("total pixels %d\n", pixels_left);
3714
3715 data += start_offset;
3716
3717 while (pixels_left > 0) {
3718 /* 0x2c = write_memory_start */
3719 /* 0x3c = write_memory_continue */
3720 u8 dcs_cmd = first ? 0x2c : 0x3c;
3721 int pixels;
3722 DSI_DECL_VARS;
3723 first = 0;
3724
3725 #if 1
3726 /* using fifo not empty */
3727 /* TX_FIFO_NOT_EMPTY */
3728 while (FLD_GET(dsi_read_reg(dsidev, DSI_VC_CTRL(0)), 5, 5)) {
3729 fifo_stalls++;
3730 if (fifo_stalls > 0xfffff) {
3731 DSSERR("fifo stalls overflow, pixels left %d\n",
3732 pixels_left);
3733 dsi_if_enable(dsidev, 0);
3734 return -EIO;
3735 }
3736 udelay(1);
3737 }
3738 #elif 1
3739 /* using fifo emptiness */
3740 while ((REG_GET(dsidev, DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
3741 max_dsi_packet_size) {
3742 fifo_stalls++;
3743 if (fifo_stalls > 0xfffff) {
3744 DSSERR("fifo stalls overflow, pixels left %d\n",
3745 pixels_left);
3746 dsi_if_enable(dsidev, 0);
3747 return -EIO;
3748 }
3749 }
3750 #else
3751 while ((REG_GET(dsidev, DSI_TX_FIFO_VC_EMPTINESS,
3752 7, 0) + 1) * 4 == 0) {
3753 fifo_stalls++;
3754 if (fifo_stalls > 0xfffff) {
3755 DSSERR("fifo stalls overflow, pixels left %d\n",
3756 pixels_left);
3757 dsi_if_enable(dsidev, 0);
3758 return -EIO;
3759 }
3760 }
3761 #endif
3762 pixels = min(max_pixels_per_packet, pixels_left);
3763
3764 pixels_left -= pixels;
3765
3766 dsi_vc_write_long_header(dsidev, 0, DSI_DT_DCS_LONG_WRITE,
3767 1 + pixels * bytespp, 0);
3768
3769 DSI_PUSH(dsidev, 0, dcs_cmd);
3770
3771 while (pixels-- > 0) {
3772 u32 pix = __raw_readl(data++);
3773
3774 DSI_PUSH(dsidev, 0, (pix >> 16) & 0xff);
3775 DSI_PUSH(dsidev, 0, (pix >> 8) & 0xff);
3776 DSI_PUSH(dsidev, 0, (pix >> 0) & 0xff);
3777
3778 current_x++;
3779 if (current_x == x+w) {
3780 current_x = x;
3781 data += horiz_inc;
3782 }
3783 }
3784
3785 DSI_FLUSH(dsidev, 0);
3786 }
3787
3788 return 0;
3789 }
3790
3791 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
3792 u16 x, u16 y, u16 w, u16 h)
3793 {
3794 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3795 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3796 unsigned bytespp;
3797 unsigned bytespl;
3798 unsigned bytespf;
3799 unsigned total_len;
3800 unsigned packet_payload;
3801 unsigned packet_len;
3802 u32 l;
3803 int r;
3804 const unsigned channel = dsi->update_channel;
3805 const unsigned line_buf_size = dsi_get_line_buf_size(dsidev);
3806
3807 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
3808 x, y, w, h);
3809
3810 dsi_vc_config_vp(dsidev, channel);
3811
3812 bytespp = dssdev->ctrl.pixel_size / 8;
3813 bytespl = w * bytespp;
3814 bytespf = bytespl * h;
3815
3816 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3817 * number of lines in a packet. See errata about VP_CLK_RATIO */
3818
3819 if (bytespf < line_buf_size)
3820 packet_payload = bytespf;
3821 else
3822 packet_payload = (line_buf_size) / bytespl * bytespl;
3823
3824 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3825 total_len = (bytespf / packet_payload) * packet_len;
3826
3827 if (bytespf % packet_payload)
3828 total_len += (bytespf % packet_payload) + 1;
3829
3830 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3831 dsi_write_reg(dsidev, DSI_VC_TE(channel), l);
3832
3833 dsi_vc_write_long_header(dsidev, channel, DSI_DT_DCS_LONG_WRITE,
3834 packet_len, 0);
3835
3836 if (dsi->te_enabled)
3837 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3838 else
3839 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3840 dsi_write_reg(dsidev, DSI_VC_TE(channel), l);
3841
3842 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3843 * because DSS interrupts are not capable of waking up the CPU and the
3844 * framedone interrupt could be delayed for quite a long time. I think
3845 * the same goes for any DSS interrupts, but for some reason I have not
3846 * seen the problem anywhere else than here.
3847 */
3848 dispc_disable_sidle();
3849
3850 dsi_perf_mark_start(dsidev);
3851
3852 r = schedule_delayed_work(&dsi->framedone_timeout_work,
3853 msecs_to_jiffies(250));
3854 BUG_ON(r == 0);
3855
3856 dss_start_update(dssdev);
3857
3858 if (dsi->te_enabled) {
3859 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3860 * for TE is longer than the timer allows */
3861 REG_FLD_MOD(dsidev, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3862
3863 dsi_vc_send_bta(dsidev, channel);
3864
3865 #ifdef DSI_CATCH_MISSING_TE
3866 mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250));
3867 #endif
3868 }
3869 }
3870
3871 #ifdef DSI_CATCH_MISSING_TE
3872 static void dsi_te_timeout(unsigned long arg)
3873 {
3874 DSSERR("TE not received for 250ms!\n");
3875 }
3876 #endif
3877
3878 static void dsi_handle_framedone(struct platform_device *dsidev, int error)
3879 {
3880 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3881
3882 /* SIDLEMODE back to smart-idle */
3883 dispc_enable_sidle();
3884
3885 if (dsi->te_enabled) {
3886 /* enable LP_RX_TO again after the TE */
3887 REG_FLD_MOD(dsidev, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
3888 }
3889
3890 dsi->framedone_callback(error, dsi->framedone_data);
3891
3892 if (!error)
3893 dsi_perf_show(dsidev, "DISPC");
3894 }
3895
3896 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
3897 {
3898 struct dsi_data *dsi = container_of(work, struct dsi_data,
3899 framedone_timeout_work.work);
3900 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
3901 * 250ms which would conflict with this timeout work. What should be
3902 * done is first cancel the transfer on the HW, and then cancel the
3903 * possibly scheduled framedone work. However, cancelling the transfer
3904 * on the HW is buggy, and would probably require resetting the whole
3905 * DSI */
3906
3907 DSSERR("Framedone not received for 250ms!\n");
3908
3909 dsi_handle_framedone(dsi->pdev, -ETIMEDOUT);
3910 }
3911
3912 static void dsi_framedone_irq_callback(void *data, u32 mask)
3913 {
3914 struct omap_dss_device *dssdev = (struct omap_dss_device *) data;
3915 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3916 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3917
3918 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
3919 * turns itself off. However, DSI still has the pixels in its buffers,
3920 * and is sending the data.
3921 */
3922
3923 __cancel_delayed_work(&dsi->framedone_timeout_work);
3924
3925 dsi_handle_framedone(dsidev, 0);
3926
3927 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
3928 dispc_fake_vsync_irq();
3929 #endif
3930 }
3931
3932 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
3933 u16 *x, u16 *y, u16 *w, u16 *h,
3934 bool enlarge_update_area)
3935 {
3936 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3937 u16 dw, dh;
3938
3939 dssdev->driver->get_resolution(dssdev, &dw, &dh);
3940
3941 if (*x > dw || *y > dh)
3942 return -EINVAL;
3943
3944 if (*x + *w > dw)
3945 return -EINVAL;
3946
3947 if (*y + *h > dh)
3948 return -EINVAL;
3949
3950 if (*w == 1)
3951 return -EINVAL;
3952
3953 if (*w == 0 || *h == 0)
3954 return -EINVAL;
3955
3956 dsi_perf_mark_setup(dsidev);
3957
3958 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3959 dss_setup_partial_planes(dssdev, x, y, w, h,
3960 enlarge_update_area);
3961 dispc_set_lcd_size(dssdev->manager->id, *w, *h);
3962 }
3963
3964 return 0;
3965 }
3966 EXPORT_SYMBOL(omap_dsi_prepare_update);
3967
3968 int omap_dsi_update(struct omap_dss_device *dssdev,
3969 int channel,
3970 u16 x, u16 y, u16 w, u16 h,
3971 void (*callback)(int, void *), void *data)
3972 {
3973 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
3974 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
3975
3976 dsi->update_channel = channel;
3977
3978 /* OMAP DSS cannot send updates of odd widths.
3979 * omap_dsi_prepare_update() makes the widths even, but add a BUG_ON
3980 * here to make sure we catch erroneous updates. Otherwise we'll only
3981 * see rather obscure HW error happening, as DSS halts. */
3982 BUG_ON(x % 2 == 1);
3983
3984 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3985 dsi->framedone_callback = callback;
3986 dsi->framedone_data = data;
3987
3988 dsi->update_region.x = x;
3989 dsi->update_region.y = y;
3990 dsi->update_region.w = w;
3991 dsi->update_region.h = h;
3992 dsi->update_region.device = dssdev;
3993
3994 dsi_update_screen_dispc(dssdev, x, y, w, h);
3995 } else {
3996 int r;
3997
3998 r = dsi_update_screen_l4(dssdev, x, y, w, h);
3999 if (r)
4000 return r;
4001
4002 dsi_perf_show(dsidev, "L4");
4003 callback(0, data);
4004 }
4005
4006 return 0;
4007 }
4008 EXPORT_SYMBOL(omap_dsi_update);
4009
4010 /* Display funcs */
4011
4012 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
4013 {
4014 int r;
4015 u32 irq;
4016
4017 irq = dssdev->manager->id == OMAP_DSS_CHANNEL_LCD ?
4018 DISPC_IRQ_FRAMEDONE : DISPC_IRQ_FRAMEDONE2;
4019
4020 r = omap_dispc_register_isr(dsi_framedone_irq_callback, (void *) dssdev,
4021 irq);
4022 if (r) {
4023 DSSERR("can't get FRAMEDONE irq\n");
4024 return r;
4025 }
4026
4027 dispc_set_lcd_display_type(dssdev->manager->id,
4028 OMAP_DSS_LCD_DISPLAY_TFT);
4029
4030 dispc_set_parallel_interface_mode(dssdev->manager->id,
4031 OMAP_DSS_PARALLELMODE_DSI);
4032 dispc_enable_fifohandcheck(dssdev->manager->id, 1);
4033
4034 dispc_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
4035
4036 {
4037 struct omap_video_timings timings = {
4038 .hsw = 1,
4039 .hfp = 1,
4040 .hbp = 1,
4041 .vsw = 1,
4042 .vfp = 0,
4043 .vbp = 0,
4044 };
4045
4046 dispc_set_lcd_timings(dssdev->manager->id, &timings);
4047 }
4048
4049 return 0;
4050 }
4051
4052 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
4053 {
4054 u32 irq;
4055
4056 irq = dssdev->manager->id == OMAP_DSS_CHANNEL_LCD ?
4057 DISPC_IRQ_FRAMEDONE : DISPC_IRQ_FRAMEDONE2;
4058
4059 omap_dispc_unregister_isr(dsi_framedone_irq_callback, (void *) dssdev,
4060 irq);
4061 }
4062
4063 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
4064 {
4065 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4066 struct dsi_clock_info cinfo;
4067 int r;
4068
4069 /* we always use DSS_CLK_SYSCK as input clock */
4070 cinfo.use_sys_clk = true;
4071 cinfo.regn = dssdev->clocks.dsi.regn;
4072 cinfo.regm = dssdev->clocks.dsi.regm;
4073 cinfo.regm_dispc = dssdev->clocks.dsi.regm_dispc;
4074 cinfo.regm_dsi = dssdev->clocks.dsi.regm_dsi;
4075 r = dsi_calc_clock_rates(dssdev, &cinfo);
4076 if (r) {
4077 DSSERR("Failed to calc dsi clocks\n");
4078 return r;
4079 }
4080
4081 r = dsi_pll_set_clock_div(dsidev, &cinfo);
4082 if (r) {
4083 DSSERR("Failed to set dsi clocks\n");
4084 return r;
4085 }
4086
4087 return 0;
4088 }
4089
4090 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
4091 {
4092 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4093 struct dispc_clock_info dispc_cinfo;
4094 int r;
4095 unsigned long long fck;
4096
4097 fck = dsi_get_pll_hsdiv_dispc_rate(dsidev);
4098
4099 dispc_cinfo.lck_div = dssdev->clocks.dispc.channel.lck_div;
4100 dispc_cinfo.pck_div = dssdev->clocks.dispc.channel.pck_div;
4101
4102 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
4103 if (r) {
4104 DSSERR("Failed to calc dispc clocks\n");
4105 return r;
4106 }
4107
4108 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
4109 if (r) {
4110 DSSERR("Failed to set dispc clocks\n");
4111 return r;
4112 }
4113
4114 return 0;
4115 }
4116
4117 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
4118 {
4119 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4120 int dsi_module = dsi_get_dsidev_id(dsidev);
4121 int r;
4122
4123 r = dsi_pll_init(dsidev, true, true);
4124 if (r)
4125 goto err0;
4126
4127 r = dsi_configure_dsi_clocks(dssdev);
4128 if (r)
4129 goto err1;
4130
4131 dss_select_dispc_clk_source(dssdev->clocks.dispc.dispc_fclk_src);
4132 dss_select_dsi_clk_source(dsi_module, dssdev->clocks.dsi.dsi_fclk_src);
4133 dss_select_lcd_clk_source(dssdev->manager->id,
4134 dssdev->clocks.dispc.channel.lcd_clk_src);
4135
4136 DSSDBG("PLL OK\n");
4137
4138 r = dsi_configure_dispc_clocks(dssdev);
4139 if (r)
4140 goto err2;
4141
4142 r = dsi_cio_init(dssdev);
4143 if (r)
4144 goto err2;
4145
4146 _dsi_print_reset_status(dsidev);
4147
4148 dsi_proto_timings(dssdev);
4149 dsi_set_lp_clk_divisor(dssdev);
4150
4151 if (1)
4152 _dsi_print_reset_status(dsidev);
4153
4154 r = dsi_proto_config(dssdev);
4155 if (r)
4156 goto err3;
4157
4158 /* enable interface */
4159 dsi_vc_enable(dsidev, 0, 1);
4160 dsi_vc_enable(dsidev, 1, 1);
4161 dsi_vc_enable(dsidev, 2, 1);
4162 dsi_vc_enable(dsidev, 3, 1);
4163 dsi_if_enable(dsidev, 1);
4164 dsi_force_tx_stop_mode_io(dsidev);
4165
4166 return 0;
4167 err3:
4168 dsi_cio_uninit(dsidev);
4169 err2:
4170 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
4171 dss_select_dsi_clk_source(dsi_module, OMAP_DSS_CLK_SRC_FCK);
4172 err1:
4173 dsi_pll_uninit(dsidev, true);
4174 err0:
4175 return r;
4176 }
4177
4178 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev,
4179 bool disconnect_lanes, bool enter_ulps)
4180 {
4181 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4182 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4183 int dsi_module = dsi_get_dsidev_id(dsidev);
4184
4185 if (enter_ulps && !dsi->ulps_enabled)
4186 dsi_enter_ulps(dsidev);
4187
4188 /* disable interface */
4189 dsi_if_enable(dsidev, 0);
4190 dsi_vc_enable(dsidev, 0, 0);
4191 dsi_vc_enable(dsidev, 1, 0);
4192 dsi_vc_enable(dsidev, 2, 0);
4193 dsi_vc_enable(dsidev, 3, 0);
4194
4195 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
4196 dss_select_dsi_clk_source(dsi_module, OMAP_DSS_CLK_SRC_FCK);
4197 dsi_cio_uninit(dsidev);
4198 dsi_pll_uninit(dsidev, disconnect_lanes);
4199 }
4200
4201 static int dsi_core_init(struct platform_device *dsidev)
4202 {
4203 /* Autoidle */
4204 REG_FLD_MOD(dsidev, DSI_SYSCONFIG, 1, 0, 0);
4205
4206 /* ENWAKEUP */
4207 REG_FLD_MOD(dsidev, DSI_SYSCONFIG, 1, 2, 2);
4208
4209 /* SIDLEMODE smart-idle */
4210 REG_FLD_MOD(dsidev, DSI_SYSCONFIG, 2, 4, 3);
4211
4212 _dsi_initialize_irq(dsidev);
4213
4214 return 0;
4215 }
4216
4217 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
4218 {
4219 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4220 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4221 int r = 0;
4222
4223 DSSDBG("dsi_display_enable\n");
4224
4225 WARN_ON(!dsi_bus_is_locked(dsidev));
4226
4227 mutex_lock(&dsi->lock);
4228
4229 r = omap_dss_start_device(dssdev);
4230 if (r) {
4231 DSSERR("failed to start device\n");
4232 goto err0;
4233 }
4234
4235 enable_clocks(1);
4236 dsi_enable_pll_clock(dsidev, 1);
4237
4238 r = _dsi_reset(dsidev);
4239 if (r)
4240 goto err1;
4241
4242 dsi_core_init(dsidev);
4243
4244 r = dsi_display_init_dispc(dssdev);
4245 if (r)
4246 goto err1;
4247
4248 r = dsi_display_init_dsi(dssdev);
4249 if (r)
4250 goto err2;
4251
4252 mutex_unlock(&dsi->lock);
4253
4254 return 0;
4255
4256 err2:
4257 dsi_display_uninit_dispc(dssdev);
4258 err1:
4259 enable_clocks(0);
4260 dsi_enable_pll_clock(dsidev, 0);
4261 omap_dss_stop_device(dssdev);
4262 err0:
4263 mutex_unlock(&dsi->lock);
4264 DSSDBG("dsi_display_enable FAILED\n");
4265 return r;
4266 }
4267 EXPORT_SYMBOL(omapdss_dsi_display_enable);
4268
4269 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev,
4270 bool disconnect_lanes, bool enter_ulps)
4271 {
4272 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4273 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4274
4275 DSSDBG("dsi_display_disable\n");
4276
4277 WARN_ON(!dsi_bus_is_locked(dsidev));
4278
4279 mutex_lock(&dsi->lock);
4280
4281 dsi_display_uninit_dispc(dssdev);
4282
4283 dsi_display_uninit_dsi(dssdev, disconnect_lanes, enter_ulps);
4284
4285 enable_clocks(0);
4286 dsi_enable_pll_clock(dsidev, 0);
4287
4288 omap_dss_stop_device(dssdev);
4289
4290 mutex_unlock(&dsi->lock);
4291 }
4292 EXPORT_SYMBOL(omapdss_dsi_display_disable);
4293
4294 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
4295 {
4296 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4297 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4298
4299 dsi->te_enabled = enable;
4300 return 0;
4301 }
4302 EXPORT_SYMBOL(omapdss_dsi_enable_te);
4303
4304 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
4305 u32 fifo_size, enum omap_burst_size *burst_size,
4306 u32 *fifo_low, u32 *fifo_high)
4307 {
4308 unsigned burst_size_bytes;
4309
4310 *burst_size = OMAP_DSS_BURST_16x32;
4311 burst_size_bytes = 16 * 32 / 8;
4312
4313 *fifo_high = fifo_size - burst_size_bytes;
4314 *fifo_low = fifo_size - burst_size_bytes * 2;
4315 }
4316
4317 int dsi_init_display(struct omap_dss_device *dssdev)
4318 {
4319 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4320 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4321 int dsi_module = dsi_get_dsidev_id(dsidev);
4322
4323 DSSDBG("DSI init\n");
4324
4325 /* XXX these should be figured out dynamically */
4326 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
4327 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
4328
4329 if (dsi->vdds_dsi_reg == NULL) {
4330 struct regulator *vdds_dsi;
4331
4332 vdds_dsi = regulator_get(&dsi->pdev->dev, "vdds_dsi");
4333
4334 if (IS_ERR(vdds_dsi)) {
4335 DSSERR("can't get VDDS_DSI regulator\n");
4336 return PTR_ERR(vdds_dsi);
4337 }
4338
4339 dsi->vdds_dsi_reg = vdds_dsi;
4340 }
4341
4342 if (dsi_get_num_data_lanes_dssdev(dssdev) > dsi->num_data_lanes) {
4343 DSSERR("DSI%d can't support more than %d data lanes\n",
4344 dsi_module + 1, dsi->num_data_lanes);
4345 return -EINVAL;
4346 }
4347
4348 return 0;
4349 }
4350
4351 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
4352 {
4353 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4354 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4355 int i;
4356
4357 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
4358 if (!dsi->vc[i].dssdev) {
4359 dsi->vc[i].dssdev = dssdev;
4360 *channel = i;
4361 return 0;
4362 }
4363 }
4364
4365 DSSERR("cannot get VC for display %s", dssdev->name);
4366 return -ENOSPC;
4367 }
4368 EXPORT_SYMBOL(omap_dsi_request_vc);
4369
4370 int omap_dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
4371 {
4372 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4373 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4374
4375 if (vc_id < 0 || vc_id > 3) {
4376 DSSERR("VC ID out of range\n");
4377 return -EINVAL;
4378 }
4379
4380 if (channel < 0 || channel > 3) {
4381 DSSERR("Virtual Channel out of range\n");
4382 return -EINVAL;
4383 }
4384
4385 if (dsi->vc[channel].dssdev != dssdev) {
4386 DSSERR("Virtual Channel not allocated to display %s\n",
4387 dssdev->name);
4388 return -EINVAL;
4389 }
4390
4391 dsi->vc[channel].vc_id = vc_id;
4392
4393 return 0;
4394 }
4395 EXPORT_SYMBOL(omap_dsi_set_vc_id);
4396
4397 void omap_dsi_release_vc(struct omap_dss_device *dssdev, int channel)
4398 {
4399 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
4400 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4401
4402 if ((channel >= 0 && channel <= 3) &&
4403 dsi->vc[channel].dssdev == dssdev) {
4404 dsi->vc[channel].dssdev = NULL;
4405 dsi->vc[channel].vc_id = 0;
4406 }
4407 }
4408 EXPORT_SYMBOL(omap_dsi_release_vc);
4409
4410 void dsi_wait_pll_hsdiv_dispc_active(struct platform_device *dsidev)
4411 {
4412 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 7, 1) != 1)
4413 DSSERR("%s (%s) not active\n",
4414 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
4415 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC));
4416 }
4417
4418 void dsi_wait_pll_hsdiv_dsi_active(struct platform_device *dsidev)
4419 {
4420 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 8, 1) != 1)
4421 DSSERR("%s (%s) not active\n",
4422 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
4423 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI));
4424 }
4425
4426 static void dsi_calc_clock_param_ranges(struct platform_device *dsidev)
4427 {
4428 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4429
4430 dsi->regn_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGN);
4431 dsi->regm_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM);
4432 dsi->regm_dispc_max =
4433 dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DISPC);
4434 dsi->regm_dsi_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DSI);
4435 dsi->fint_min = dss_feat_get_param_min(FEAT_PARAM_DSIPLL_FINT);
4436 dsi->fint_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_FINT);
4437 dsi->lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV);
4438 }
4439
4440 static int dsi_init(struct platform_device *dsidev)
4441 {
4442 struct omap_display_platform_data *dss_plat_data;
4443 struct omap_dss_board_info *board_info;
4444 u32 rev;
4445 int r, i, dsi_module = dsi_get_dsidev_id(dsidev);
4446 struct resource *dsi_mem;
4447 struct dsi_data *dsi;
4448
4449 dsi = kzalloc(sizeof(*dsi), GFP_KERNEL);
4450 if (!dsi) {
4451 r = -ENOMEM;
4452 goto err0;
4453 }
4454
4455 dsi->pdev = dsidev;
4456 dsi_pdev_map[dsi_module] = dsidev;
4457 dev_set_drvdata(&dsidev->dev, dsi);
4458
4459 dss_plat_data = dsidev->dev.platform_data;
4460 board_info = dss_plat_data->board_data;
4461 dsi->dsi_mux_pads = board_info->dsi_mux_pads;
4462
4463 spin_lock_init(&dsi->irq_lock);
4464 spin_lock_init(&dsi->errors_lock);
4465 dsi->errors = 0;
4466
4467 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
4468 spin_lock_init(&dsi->irq_stats_lock);
4469 dsi->irq_stats.last_reset = jiffies;
4470 #endif
4471
4472 mutex_init(&dsi->lock);
4473 sema_init(&dsi->bus_lock, 1);
4474
4475 INIT_DELAYED_WORK_DEFERRABLE(&dsi->framedone_timeout_work,
4476 dsi_framedone_timeout_work_callback);
4477
4478 #ifdef DSI_CATCH_MISSING_TE
4479 init_timer(&dsi->te_timer);
4480 dsi->te_timer.function = dsi_te_timeout;
4481 dsi->te_timer.data = 0;
4482 #endif
4483 dsi_mem = platform_get_resource(dsi->pdev, IORESOURCE_MEM, 0);
4484 if (!dsi_mem) {
4485 DSSERR("can't get IORESOURCE_MEM DSI\n");
4486 r = -EINVAL;
4487 goto err1;
4488 }
4489 dsi->base = ioremap(dsi_mem->start, resource_size(dsi_mem));
4490 if (!dsi->base) {
4491 DSSERR("can't ioremap DSI\n");
4492 r = -ENOMEM;
4493 goto err1;
4494 }
4495 dsi->irq = platform_get_irq(dsi->pdev, 0);
4496 if (dsi->irq < 0) {
4497 DSSERR("platform_get_irq failed\n");
4498 r = -ENODEV;
4499 goto err2;
4500 }
4501
4502 r = request_irq(dsi->irq, omap_dsi_irq_handler, IRQF_SHARED,
4503 dev_name(&dsidev->dev), dsi->pdev);
4504 if (r < 0) {
4505 DSSERR("request_irq failed\n");
4506 goto err2;
4507 }
4508
4509 /* DSI VCs initialization */
4510 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) {
4511 dsi->vc[i].mode = DSI_VC_MODE_L4;
4512 dsi->vc[i].dssdev = NULL;
4513 dsi->vc[i].vc_id = 0;
4514 }
4515
4516 dsi_calc_clock_param_ranges(dsidev);
4517
4518 enable_clocks(1);
4519
4520 rev = dsi_read_reg(dsidev, DSI_REVISION);
4521 dev_dbg(&dsidev->dev, "OMAP DSI rev %d.%d\n",
4522 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
4523
4524 dsi->num_data_lanes = dsi_get_num_data_lanes(dsidev);
4525
4526 enable_clocks(0);
4527
4528 return 0;
4529 err2:
4530 iounmap(dsi->base);
4531 err1:
4532 kfree(dsi);
4533 err0:
4534 return r;
4535 }
4536
4537 static void dsi_exit(struct platform_device *dsidev)
4538 {
4539 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4540
4541 if (dsi->vdds_dsi_reg != NULL) {
4542 if (dsi->vdds_dsi_enabled) {
4543 regulator_disable(dsi->vdds_dsi_reg);
4544 dsi->vdds_dsi_enabled = false;
4545 }
4546
4547 regulator_put(dsi->vdds_dsi_reg);
4548 dsi->vdds_dsi_reg = NULL;
4549 }
4550
4551 free_irq(dsi->irq, dsi->pdev);
4552 iounmap(dsi->base);
4553
4554 kfree(dsi);
4555
4556 DSSDBG("omap_dsi_exit\n");
4557 }
4558
4559 /* DSI1 HW IP initialisation */
4560 static int omap_dsi1hw_probe(struct platform_device *dsidev)
4561 {
4562 int r;
4563
4564 r = dsi_init(dsidev);
4565 if (r) {
4566 DSSERR("Failed to initialize DSI\n");
4567 goto err_dsi;
4568 }
4569 err_dsi:
4570 return r;
4571 }
4572
4573 static int omap_dsi1hw_remove(struct platform_device *dsidev)
4574 {
4575 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
4576
4577 dsi_exit(dsidev);
4578 WARN_ON(dsi->scp_clk_refcount > 0);
4579 return 0;
4580 }
4581
4582 static struct platform_driver omap_dsi1hw_driver = {
4583 .probe = omap_dsi1hw_probe,
4584 .remove = omap_dsi1hw_remove,
4585 .driver = {
4586 .name = "omapdss_dsi1",
4587 .owner = THIS_MODULE,
4588 },
4589 };
4590
4591 int dsi_init_platform_driver(void)
4592 {
4593 return platform_driver_register(&omap_dsi1hw_driver);
4594 }
4595
4596 void dsi_uninit_platform_driver(void)
4597 {
4598 return platform_driver_unregister(&omap_dsi1hw_driver);
4599 }
Linux kernel - Deliverables
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