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Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
[deliverable/linux.git] / drivers / video / sh_mobile_lcdcfb.c
1 /*
2 * SuperH Mobile LCDC Framebuffer
3 *
4 * Copyright (c) 2008 Magnus Damm
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11 #include <linux/atomic.h>
12 #include <linux/backlight.h>
13 #include <linux/clk.h>
14 #include <linux/console.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/delay.h>
17 #include <linux/gpio.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/ioctl.h>
21 #include <linux/kernel.h>
22 #include <linux/mm.h>
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/slab.h>
27 #include <linux/videodev2.h>
28 #include <linux/vmalloc.h>
29
30 #include <video/sh_mobile_lcdc.h>
31 #include <video/sh_mobile_meram.h>
32
33 #include "sh_mobile_lcdcfb.h"
34
35 #define SIDE_B_OFFSET 0x1000
36 #define MIRROR_OFFSET 0x2000
37
38 #define MAX_XRES 1920
39 #define MAX_YRES 1080
40
41 struct sh_mobile_lcdc_priv {
42 void __iomem *base;
43 int irq;
44 atomic_t hw_usecnt;
45 struct device *dev;
46 struct clk *dot_clk;
47 unsigned long lddckr;
48 struct sh_mobile_lcdc_chan ch[2];
49 struct notifier_block notifier;
50 int started;
51 int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
52 struct sh_mobile_meram_info *meram_dev;
53 };
54
55 /* -----------------------------------------------------------------------------
56 * Registers access
57 */
58
59 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
60 [LDDCKPAT1R] = 0x400,
61 [LDDCKPAT2R] = 0x404,
62 [LDMT1R] = 0x418,
63 [LDMT2R] = 0x41c,
64 [LDMT3R] = 0x420,
65 [LDDFR] = 0x424,
66 [LDSM1R] = 0x428,
67 [LDSM2R] = 0x42c,
68 [LDSA1R] = 0x430,
69 [LDSA2R] = 0x434,
70 [LDMLSR] = 0x438,
71 [LDHCNR] = 0x448,
72 [LDHSYNR] = 0x44c,
73 [LDVLNR] = 0x450,
74 [LDVSYNR] = 0x454,
75 [LDPMR] = 0x460,
76 [LDHAJR] = 0x4a0,
77 };
78
79 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
80 [LDDCKPAT1R] = 0x408,
81 [LDDCKPAT2R] = 0x40c,
82 [LDMT1R] = 0x600,
83 [LDMT2R] = 0x604,
84 [LDMT3R] = 0x608,
85 [LDDFR] = 0x60c,
86 [LDSM1R] = 0x610,
87 [LDSM2R] = 0x614,
88 [LDSA1R] = 0x618,
89 [LDMLSR] = 0x620,
90 [LDHCNR] = 0x624,
91 [LDHSYNR] = 0x628,
92 [LDVLNR] = 0x62c,
93 [LDVSYNR] = 0x630,
94 [LDPMR] = 0x63c,
95 };
96
97 static bool banked(int reg_nr)
98 {
99 switch (reg_nr) {
100 case LDMT1R:
101 case LDMT2R:
102 case LDMT3R:
103 case LDDFR:
104 case LDSM1R:
105 case LDSA1R:
106 case LDSA2R:
107 case LDMLSR:
108 case LDHCNR:
109 case LDHSYNR:
110 case LDVLNR:
111 case LDVSYNR:
112 return true;
113 }
114 return false;
115 }
116
117 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
118 {
119 return chan->cfg->chan == LCDC_CHAN_SUBLCD;
120 }
121
122 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
123 int reg_nr, unsigned long data)
124 {
125 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
126 if (banked(reg_nr))
127 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
128 SIDE_B_OFFSET);
129 }
130
131 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
132 int reg_nr, unsigned long data)
133 {
134 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
135 MIRROR_OFFSET);
136 }
137
138 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
139 int reg_nr)
140 {
141 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
142 }
143
144 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
145 unsigned long reg_offs, unsigned long data)
146 {
147 iowrite32(data, priv->base + reg_offs);
148 }
149
150 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
151 unsigned long reg_offs)
152 {
153 return ioread32(priv->base + reg_offs);
154 }
155
156 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
157 unsigned long reg_offs,
158 unsigned long mask, unsigned long until)
159 {
160 while ((lcdc_read(priv, reg_offs) & mask) != until)
161 cpu_relax();
162 }
163
164 /* -----------------------------------------------------------------------------
165 * Clock management
166 */
167
168 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
169 {
170 if (atomic_inc_and_test(&priv->hw_usecnt)) {
171 if (priv->dot_clk)
172 clk_enable(priv->dot_clk);
173 pm_runtime_get_sync(priv->dev);
174 if (priv->meram_dev && priv->meram_dev->pdev)
175 pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
176 }
177 }
178
179 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
180 {
181 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
182 if (priv->meram_dev && priv->meram_dev->pdev)
183 pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
184 pm_runtime_put(priv->dev);
185 if (priv->dot_clk)
186 clk_disable(priv->dot_clk);
187 }
188 }
189
190 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
191 int clock_source)
192 {
193 struct clk *clk;
194 char *str;
195
196 switch (clock_source) {
197 case LCDC_CLK_BUS:
198 str = "bus_clk";
199 priv->lddckr = LDDCKR_ICKSEL_BUS;
200 break;
201 case LCDC_CLK_PERIPHERAL:
202 str = "peripheral_clk";
203 priv->lddckr = LDDCKR_ICKSEL_MIPI;
204 break;
205 case LCDC_CLK_EXTERNAL:
206 str = NULL;
207 priv->lddckr = LDDCKR_ICKSEL_HDMI;
208 break;
209 default:
210 return -EINVAL;
211 }
212
213 if (str == NULL)
214 return 0;
215
216 clk = clk_get(priv->dev, str);
217 if (IS_ERR(clk)) {
218 dev_err(priv->dev, "cannot get dot clock %s\n", str);
219 return PTR_ERR(clk);
220 }
221
222 priv->dot_clk = clk;
223 return 0;
224 }
225
226 /* -----------------------------------------------------------------------------
227 * Display, panel and deferred I/O
228 */
229
230 static void lcdc_sys_write_index(void *handle, unsigned long data)
231 {
232 struct sh_mobile_lcdc_chan *ch = handle;
233
234 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
235 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
236 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
237 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
238 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
239 }
240
241 static void lcdc_sys_write_data(void *handle, unsigned long data)
242 {
243 struct sh_mobile_lcdc_chan *ch = handle;
244
245 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
246 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
247 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
248 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
249 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
250 }
251
252 static unsigned long lcdc_sys_read_data(void *handle)
253 {
254 struct sh_mobile_lcdc_chan *ch = handle;
255
256 lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
257 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
258 lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
259 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
260 udelay(1);
261 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
262
263 return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
264 }
265
266 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
267 lcdc_sys_write_index,
268 lcdc_sys_write_data,
269 lcdc_sys_read_data,
270 };
271
272 static int sh_mobile_lcdc_sginit(struct fb_info *info,
273 struct list_head *pagelist)
274 {
275 struct sh_mobile_lcdc_chan *ch = info->par;
276 unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
277 struct page *page;
278 int nr_pages = 0;
279
280 sg_init_table(ch->sglist, nr_pages_max);
281
282 list_for_each_entry(page, pagelist, lru)
283 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
284
285 return nr_pages;
286 }
287
288 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
289 struct list_head *pagelist)
290 {
291 struct sh_mobile_lcdc_chan *ch = info->par;
292 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
293
294 /* enable clocks before accessing hardware */
295 sh_mobile_lcdc_clk_on(ch->lcdc);
296
297 /*
298 * It's possible to get here without anything on the pagelist via
299 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
300 * invocation. In the former case, the acceleration routines are
301 * stepped in to when using the framebuffer console causing the
302 * workqueue to be scheduled without any dirty pages on the list.
303 *
304 * Despite this, a panel update is still needed given that the
305 * acceleration routines have their own methods for writing in
306 * that still need to be updated.
307 *
308 * The fsync() and empty pagelist case could be optimized for,
309 * but we don't bother, as any application exhibiting such
310 * behaviour is fundamentally broken anyways.
311 */
312 if (!list_empty(pagelist)) {
313 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
314
315 /* trigger panel update */
316 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
317 if (panel->start_transfer)
318 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
319 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
320 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
321 DMA_TO_DEVICE);
322 } else {
323 if (panel->start_transfer)
324 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
325 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
326 }
327 }
328
329 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
330 {
331 struct fb_deferred_io *fbdefio = info->fbdefio;
332
333 if (fbdefio)
334 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
335 }
336
337 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
338 {
339 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
340
341 if (ch->tx_dev) {
342 int ret;
343
344 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
345 if (ret < 0)
346 return;
347
348 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
349 ch->info->state = FBINFO_STATE_SUSPENDED;
350 }
351
352 /* HDMI must be enabled before LCDC configuration */
353 if (panel->display_on)
354 panel->display_on();
355 }
356
357 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
358 {
359 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
360
361 if (panel->display_off)
362 panel->display_off();
363
364 if (ch->tx_dev)
365 ch->tx_dev->ops->display_off(ch->tx_dev);
366 }
367
368 static bool
369 sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
370 const struct fb_videomode *new_mode)
371 {
372 dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
373 ch->display.mode.xres, ch->display.mode.yres,
374 new_mode->xres, new_mode->yres);
375
376 /* It can be a different monitor with an equal video-mode */
377 if (fb_mode_is_equal(&ch->display.mode, new_mode))
378 return false;
379
380 dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
381 ch->display.mode.yres, new_mode->yres);
382 ch->display.mode = *new_mode;
383
384 return true;
385 }
386
387 static int sh_mobile_check_var(struct fb_var_screeninfo *var,
388 struct fb_info *info);
389
390 static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
391 enum sh_mobile_lcdc_entity_event event,
392 const struct fb_videomode *mode,
393 const struct fb_monspecs *monspec)
394 {
395 struct fb_info *info = ch->info;
396 struct fb_var_screeninfo var;
397 int ret = 0;
398
399 switch (event) {
400 case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
401 /* HDMI plug in */
402 if (lock_fb_info(info)) {
403 console_lock();
404
405 ch->display.width = monspec->max_x * 10;
406 ch->display.height = monspec->max_y * 10;
407
408 if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
409 info->state == FBINFO_STATE_RUNNING) {
410 /* First activation with the default monitor.
411 * Just turn on, if we run a resume here, the
412 * logo disappears.
413 */
414 info->var.width = monspec->max_x * 10;
415 info->var.height = monspec->max_y * 10;
416 sh_mobile_lcdc_display_on(ch);
417 } else {
418 /* New monitor or have to wake up */
419 fb_set_suspend(info, 0);
420 }
421
422 console_unlock();
423 unlock_fb_info(info);
424 }
425 break;
426
427 case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
428 /* HDMI disconnect */
429 if (lock_fb_info(info)) {
430 console_lock();
431 fb_set_suspend(info, 1);
432 console_unlock();
433 unlock_fb_info(info);
434 }
435 break;
436
437 case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
438 /* Validate a proposed new mode */
439 fb_videomode_to_var(&var, mode);
440 var.bits_per_pixel = info->var.bits_per_pixel;
441 var.grayscale = info->var.grayscale;
442 ret = sh_mobile_check_var(&var, info);
443 break;
444 }
445
446 return ret;
447 }
448
449 /* -----------------------------------------------------------------------------
450 * Format helpers
451 */
452
453 struct sh_mobile_lcdc_format_info {
454 u32 fourcc;
455 unsigned int bpp;
456 bool yuv;
457 u32 lddfr;
458 };
459
460 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
461 {
462 .fourcc = V4L2_PIX_FMT_RGB565,
463 .bpp = 16,
464 .yuv = false,
465 .lddfr = LDDFR_PKF_RGB16,
466 }, {
467 .fourcc = V4L2_PIX_FMT_BGR24,
468 .bpp = 24,
469 .yuv = false,
470 .lddfr = LDDFR_PKF_RGB24,
471 }, {
472 .fourcc = V4L2_PIX_FMT_BGR32,
473 .bpp = 32,
474 .yuv = false,
475 .lddfr = LDDFR_PKF_ARGB32,
476 }, {
477 .fourcc = V4L2_PIX_FMT_NV12,
478 .bpp = 12,
479 .yuv = true,
480 .lddfr = LDDFR_CC | LDDFR_YF_420,
481 }, {
482 .fourcc = V4L2_PIX_FMT_NV21,
483 .bpp = 12,
484 .yuv = true,
485 .lddfr = LDDFR_CC | LDDFR_YF_420,
486 }, {
487 .fourcc = V4L2_PIX_FMT_NV16,
488 .bpp = 16,
489 .yuv = true,
490 .lddfr = LDDFR_CC | LDDFR_YF_422,
491 }, {
492 .fourcc = V4L2_PIX_FMT_NV61,
493 .bpp = 16,
494 .yuv = true,
495 .lddfr = LDDFR_CC | LDDFR_YF_422,
496 }, {
497 .fourcc = V4L2_PIX_FMT_NV24,
498 .bpp = 24,
499 .yuv = true,
500 .lddfr = LDDFR_CC | LDDFR_YF_444,
501 }, {
502 .fourcc = V4L2_PIX_FMT_NV42,
503 .bpp = 24,
504 .yuv = true,
505 .lddfr = LDDFR_CC | LDDFR_YF_444,
506 },
507 };
508
509 static const struct sh_mobile_lcdc_format_info *
510 sh_mobile_format_info(u32 fourcc)
511 {
512 unsigned int i;
513
514 for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
515 if (sh_mobile_format_infos[i].fourcc == fourcc)
516 return &sh_mobile_format_infos[i];
517 }
518
519 return NULL;
520 }
521
522 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
523 {
524 if (var->grayscale > 1)
525 return var->grayscale;
526
527 switch (var->bits_per_pixel) {
528 case 16:
529 return V4L2_PIX_FMT_RGB565;
530 case 24:
531 return V4L2_PIX_FMT_BGR24;
532 case 32:
533 return V4L2_PIX_FMT_BGR32;
534 default:
535 return 0;
536 }
537 }
538
539 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
540 {
541 return var->grayscale > 1;
542 }
543
544 /* -----------------------------------------------------------------------------
545 * Start, stop and IRQ
546 */
547
548 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
549 {
550 struct sh_mobile_lcdc_priv *priv = data;
551 struct sh_mobile_lcdc_chan *ch;
552 unsigned long ldintr;
553 int is_sub;
554 int k;
555
556 /* Acknowledge interrupts and disable further VSYNC End IRQs. */
557 ldintr = lcdc_read(priv, _LDINTR);
558 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
559
560 /* figure out if this interrupt is for main or sub lcd */
561 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
562
563 /* wake up channel and disable clocks */
564 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
565 ch = &priv->ch[k];
566
567 if (!ch->enabled)
568 continue;
569
570 /* Frame End */
571 if (ldintr & LDINTR_FS) {
572 if (is_sub == lcdc_chan_is_sublcd(ch)) {
573 ch->frame_end = 1;
574 wake_up(&ch->frame_end_wait);
575
576 sh_mobile_lcdc_clk_off(priv);
577 }
578 }
579
580 /* VSYNC End */
581 if (ldintr & LDINTR_VES)
582 complete(&ch->vsync_completion);
583 }
584
585 return IRQ_HANDLED;
586 }
587
588 static int sh_mobile_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
589 {
590 unsigned long ldintr;
591 int ret;
592
593 /* Enable VSync End interrupt and be careful not to acknowledge any
594 * pending interrupt.
595 */
596 ldintr = lcdc_read(ch->lcdc, _LDINTR);
597 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
598 lcdc_write(ch->lcdc, _LDINTR, ldintr);
599
600 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
601 msecs_to_jiffies(100));
602 if (!ret)
603 return -ETIMEDOUT;
604
605 return 0;
606 }
607
608 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
609 int start)
610 {
611 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
612 int k;
613
614 /* start or stop the lcdc */
615 if (start)
616 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
617 else
618 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
619
620 /* wait until power is applied/stopped on all channels */
621 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
622 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
623 while (1) {
624 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
625 & LDPMR_LPS;
626 if (start && tmp == LDPMR_LPS)
627 break;
628 if (!start && tmp == 0)
629 break;
630 cpu_relax();
631 }
632
633 if (!start)
634 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
635 }
636
637 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
638 {
639 const struct fb_var_screeninfo *var = &ch->info->var;
640 const struct fb_videomode *mode = &ch->display.mode;
641 unsigned long h_total, hsync_pos, display_h_total;
642 u32 tmp;
643
644 tmp = ch->ldmt1r_value;
645 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
646 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
647 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
648 tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
649 tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
650 tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
651 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
652 lcdc_write_chan(ch, LDMT1R, tmp);
653
654 /* setup SYS bus */
655 lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
656 lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
657
658 /* horizontal configuration */
659 h_total = mode->xres + mode->hsync_len + mode->left_margin
660 + mode->right_margin;
661 tmp = h_total / 8; /* HTCN */
662 tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
663 lcdc_write_chan(ch, LDHCNR, tmp);
664
665 hsync_pos = mode->xres + mode->right_margin;
666 tmp = hsync_pos / 8; /* HSYNP */
667 tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
668 lcdc_write_chan(ch, LDHSYNR, tmp);
669
670 /* vertical configuration */
671 tmp = mode->yres + mode->vsync_len + mode->upper_margin
672 + mode->lower_margin; /* VTLN */
673 tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
674 lcdc_write_chan(ch, LDVLNR, tmp);
675
676 tmp = mode->yres + mode->lower_margin; /* VSYNP */
677 tmp |= mode->vsync_len << 16; /* VSYNW */
678 lcdc_write_chan(ch, LDVSYNR, tmp);
679
680 /* Adjust horizontal synchronisation for HDMI */
681 display_h_total = mode->xres + mode->hsync_len + mode->left_margin
682 + mode->right_margin;
683 tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
684 | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
685 lcdc_write_chan(ch, LDHAJR, tmp);
686 }
687
688 /*
689 * __sh_mobile_lcdc_start - Configure and tart the LCDC
690 * @priv: LCDC device
691 *
692 * Configure all enabled channels and start the LCDC device. All external
693 * devices (clocks, MERAM, panels, ...) are not touched by this function.
694 */
695 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
696 {
697 struct sh_mobile_lcdc_chan *ch;
698 unsigned long tmp;
699 int k, m;
700
701 /* Enable LCDC channels. Read data from external memory, avoid using the
702 * BEU for now.
703 */
704 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
705
706 /* Stop the LCDC first and disable all interrupts. */
707 sh_mobile_lcdc_start_stop(priv, 0);
708 lcdc_write(priv, _LDINTR, 0);
709
710 /* Configure power supply, dot clocks and start them. */
711 tmp = priv->lddckr;
712 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
713 ch = &priv->ch[k];
714 if (!ch->enabled)
715 continue;
716
717 /* Power supply */
718 lcdc_write_chan(ch, LDPMR, 0);
719
720 m = ch->cfg->clock_divider;
721 if (!m)
722 continue;
723
724 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
725 * denominator.
726 */
727 lcdc_write_chan(ch, LDDCKPAT1R, 0);
728 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
729
730 if (m == 1)
731 m = LDDCKR_MOSEL;
732 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
733 }
734
735 lcdc_write(priv, _LDDCKR, tmp);
736 lcdc_write(priv, _LDDCKSTPR, 0);
737 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
738
739 /* Setup geometry, format, frame buffer memory and operation mode. */
740 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
741 ch = &priv->ch[k];
742 if (!ch->enabled)
743 continue;
744
745 sh_mobile_lcdc_geometry(ch);
746
747 tmp = ch->format->lddfr;
748
749 if (ch->format->yuv) {
750 switch (ch->colorspace) {
751 case V4L2_COLORSPACE_REC709:
752 tmp |= LDDFR_CF1;
753 break;
754 case V4L2_COLORSPACE_JPEG:
755 tmp |= LDDFR_CF0;
756 break;
757 }
758 }
759
760 lcdc_write_chan(ch, LDDFR, tmp);
761 lcdc_write_chan(ch, LDMLSR, ch->pitch);
762 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
763 if (ch->format->yuv)
764 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
765
766 /* When using deferred I/O mode, configure the LCDC for one-shot
767 * operation and enable the frame end interrupt. Otherwise use
768 * continuous read mode.
769 */
770 if (ch->ldmt1r_value & LDMT1R_IFM &&
771 ch->cfg->sys_bus_cfg.deferred_io_msec) {
772 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
773 lcdc_write(priv, _LDINTR, LDINTR_FE);
774 } else {
775 lcdc_write_chan(ch, LDSM1R, 0);
776 }
777 }
778
779 /* Word and long word swap. */
780 switch (priv->ch[0].format->fourcc) {
781 case V4L2_PIX_FMT_RGB565:
782 case V4L2_PIX_FMT_NV21:
783 case V4L2_PIX_FMT_NV61:
784 case V4L2_PIX_FMT_NV42:
785 tmp = LDDDSR_LS | LDDDSR_WS;
786 break;
787 case V4L2_PIX_FMT_BGR24:
788 case V4L2_PIX_FMT_NV12:
789 case V4L2_PIX_FMT_NV16:
790 case V4L2_PIX_FMT_NV24:
791 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
792 break;
793 case V4L2_PIX_FMT_BGR32:
794 default:
795 tmp = LDDDSR_LS;
796 break;
797 }
798 lcdc_write(priv, _LDDDSR, tmp);
799
800 /* Enable the display output. */
801 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
802 sh_mobile_lcdc_start_stop(priv, 1);
803 priv->started = 1;
804 }
805
806 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
807 {
808 struct sh_mobile_meram_info *mdev = priv->meram_dev;
809 struct sh_mobile_lcdc_chan *ch;
810 unsigned long tmp;
811 int ret;
812 int k;
813
814 /* enable clocks before accessing the hardware */
815 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
816 if (priv->ch[k].enabled)
817 sh_mobile_lcdc_clk_on(priv);
818 }
819
820 /* reset */
821 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
822 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
823
824 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
825 const struct sh_mobile_lcdc_panel_cfg *panel;
826
827 ch = &priv->ch[k];
828 if (!ch->enabled)
829 continue;
830
831 panel = &ch->cfg->panel_cfg;
832 if (panel->setup_sys) {
833 ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
834 if (ret)
835 return ret;
836 }
837 }
838
839 /* Compute frame buffer base address and pitch for each channel. */
840 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
841 int pixelformat;
842 void *meram;
843
844 ch = &priv->ch[k];
845 if (!ch->enabled)
846 continue;
847
848 ch->base_addr_y = ch->dma_handle;
849 ch->base_addr_c = ch->base_addr_y + ch->xres * ch->yres_virtual;
850
851 /* Enable MERAM if possible. */
852 if (mdev == NULL || mdev->ops == NULL ||
853 ch->cfg->meram_cfg == NULL)
854 continue;
855
856 /* we need to de-init configured ICBs before we can
857 * re-initialize them.
858 */
859 if (ch->meram) {
860 mdev->ops->meram_unregister(mdev, ch->meram);
861 ch->meram = NULL;
862 }
863
864 switch (ch->format->fourcc) {
865 case V4L2_PIX_FMT_NV12:
866 case V4L2_PIX_FMT_NV21:
867 case V4L2_PIX_FMT_NV16:
868 case V4L2_PIX_FMT_NV61:
869 pixelformat = SH_MOBILE_MERAM_PF_NV;
870 break;
871 case V4L2_PIX_FMT_NV24:
872 case V4L2_PIX_FMT_NV42:
873 pixelformat = SH_MOBILE_MERAM_PF_NV24;
874 break;
875 case V4L2_PIX_FMT_RGB565:
876 case V4L2_PIX_FMT_BGR24:
877 case V4L2_PIX_FMT_BGR32:
878 default:
879 pixelformat = SH_MOBILE_MERAM_PF_RGB;
880 break;
881 }
882
883 meram = mdev->ops->meram_register(mdev, ch->cfg->meram_cfg,
884 ch->pitch, ch->yres, pixelformat,
885 &ch->pitch);
886 if (!IS_ERR(meram)) {
887 mdev->ops->meram_update(mdev, meram,
888 ch->base_addr_y, ch->base_addr_c,
889 &ch->base_addr_y, &ch->base_addr_c);
890 ch->meram = meram;
891 }
892 }
893
894 /* Start the LCDC. */
895 __sh_mobile_lcdc_start(priv);
896
897 /* Setup deferred I/O, tell the board code to enable the panels, and
898 * turn backlight on.
899 */
900 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
901 ch = &priv->ch[k];
902 if (!ch->enabled)
903 continue;
904
905 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
906 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
907 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
908 ch->defio.delay = msecs_to_jiffies(tmp);
909 ch->info->fbdefio = &ch->defio;
910 fb_deferred_io_init(ch->info);
911 }
912
913 sh_mobile_lcdc_display_on(ch);
914
915 if (ch->bl) {
916 ch->bl->props.power = FB_BLANK_UNBLANK;
917 backlight_update_status(ch->bl);
918 }
919 }
920
921 return 0;
922 }
923
924 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
925 {
926 struct sh_mobile_lcdc_chan *ch;
927 int k;
928
929 /* clean up deferred io and ask board code to disable panel */
930 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
931 ch = &priv->ch[k];
932 if (!ch->enabled)
933 continue;
934
935 /* deferred io mode:
936 * flush frame, and wait for frame end interrupt
937 * clean up deferred io and enable clock
938 */
939 if (ch->info && ch->info->fbdefio) {
940 ch->frame_end = 0;
941 schedule_delayed_work(&ch->info->deferred_work, 0);
942 wait_event(ch->frame_end_wait, ch->frame_end);
943 fb_deferred_io_cleanup(ch->info);
944 ch->info->fbdefio = NULL;
945 sh_mobile_lcdc_clk_on(priv);
946 }
947
948 if (ch->bl) {
949 ch->bl->props.power = FB_BLANK_POWERDOWN;
950 backlight_update_status(ch->bl);
951 }
952
953 sh_mobile_lcdc_display_off(ch);
954
955 /* disable the meram */
956 if (ch->meram) {
957 struct sh_mobile_meram_info *mdev;
958 mdev = priv->meram_dev;
959 mdev->ops->meram_unregister(mdev, ch->meram);
960 ch->meram = 0;
961 }
962
963 }
964
965 /* stop the lcdc */
966 if (priv->started) {
967 sh_mobile_lcdc_start_stop(priv, 0);
968 priv->started = 0;
969 }
970
971 /* stop clocks */
972 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
973 if (priv->ch[k].enabled)
974 sh_mobile_lcdc_clk_off(priv);
975 }
976
977 /* -----------------------------------------------------------------------------
978 * Frame buffer operations
979 */
980
981 static int sh_mobile_lcdc_setcolreg(u_int regno,
982 u_int red, u_int green, u_int blue,
983 u_int transp, struct fb_info *info)
984 {
985 u32 *palette = info->pseudo_palette;
986
987 if (regno >= PALETTE_NR)
988 return -EINVAL;
989
990 /* only FB_VISUAL_TRUECOLOR supported */
991
992 red >>= 16 - info->var.red.length;
993 green >>= 16 - info->var.green.length;
994 blue >>= 16 - info->var.blue.length;
995 transp >>= 16 - info->var.transp.length;
996
997 palette[regno] = (red << info->var.red.offset) |
998 (green << info->var.green.offset) |
999 (blue << info->var.blue.offset) |
1000 (transp << info->var.transp.offset);
1001
1002 return 0;
1003 }
1004
1005 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
1006 .id = "SH Mobile LCDC",
1007 .type = FB_TYPE_PACKED_PIXELS,
1008 .visual = FB_VISUAL_TRUECOLOR,
1009 .accel = FB_ACCEL_NONE,
1010 .xpanstep = 0,
1011 .ypanstep = 1,
1012 .ywrapstep = 0,
1013 .capabilities = FB_CAP_FOURCC,
1014 };
1015
1016 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1017 const struct fb_fillrect *rect)
1018 {
1019 sys_fillrect(info, rect);
1020 sh_mobile_lcdc_deferred_io_touch(info);
1021 }
1022
1023 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1024 const struct fb_copyarea *area)
1025 {
1026 sys_copyarea(info, area);
1027 sh_mobile_lcdc_deferred_io_touch(info);
1028 }
1029
1030 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1031 const struct fb_image *image)
1032 {
1033 sys_imageblit(info, image);
1034 sh_mobile_lcdc_deferred_io_touch(info);
1035 }
1036
1037 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
1038 struct fb_info *info)
1039 {
1040 struct sh_mobile_lcdc_chan *ch = info->par;
1041 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1042 unsigned long ldrcntr;
1043 unsigned long new_pan_offset;
1044 unsigned long base_addr_y, base_addr_c;
1045 unsigned long c_offset;
1046
1047 if (!ch->format->yuv)
1048 new_pan_offset = var->yoffset * ch->pitch
1049 + var->xoffset * (ch->format->bpp / 8);
1050 else
1051 new_pan_offset = var->yoffset * ch->pitch + var->xoffset;
1052
1053 if (new_pan_offset == ch->pan_offset)
1054 return 0; /* No change, do nothing */
1055
1056 ldrcntr = lcdc_read(priv, _LDRCNTR);
1057
1058 /* Set the source address for the next refresh */
1059 base_addr_y = ch->dma_handle + new_pan_offset;
1060 if (ch->format->yuv) {
1061 /* Set y offset */
1062 c_offset = var->yoffset * ch->pitch
1063 * (ch->format->bpp - 8) / 8;
1064 base_addr_c = ch->dma_handle + ch->xres * ch->yres_virtual
1065 + c_offset;
1066 /* Set x offset */
1067 if (ch->format->fourcc == V4L2_PIX_FMT_NV24)
1068 base_addr_c += 2 * var->xoffset;
1069 else
1070 base_addr_c += var->xoffset;
1071 }
1072
1073 if (ch->meram) {
1074 struct sh_mobile_meram_info *mdev;
1075
1076 mdev = priv->meram_dev;
1077 mdev->ops->meram_update(mdev, ch->meram,
1078 base_addr_y, base_addr_c,
1079 &base_addr_y, &base_addr_c);
1080 }
1081
1082 ch->base_addr_y = base_addr_y;
1083 ch->base_addr_c = base_addr_c;
1084
1085 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1086 if (ch->format->yuv)
1087 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1088
1089 if (lcdc_chan_is_sublcd(ch))
1090 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1091 else
1092 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1093
1094 ch->pan_offset = new_pan_offset;
1095
1096 sh_mobile_lcdc_deferred_io_touch(info);
1097
1098 return 0;
1099 }
1100
1101 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
1102 unsigned long arg)
1103 {
1104 int retval;
1105
1106 switch (cmd) {
1107 case FBIO_WAITFORVSYNC:
1108 retval = sh_mobile_wait_for_vsync(info->par);
1109 break;
1110
1111 default:
1112 retval = -ENOIOCTLCMD;
1113 break;
1114 }
1115 return retval;
1116 }
1117
1118 static void sh_mobile_fb_reconfig(struct fb_info *info)
1119 {
1120 struct sh_mobile_lcdc_chan *ch = info->par;
1121 struct fb_var_screeninfo var;
1122 struct fb_videomode mode;
1123 struct fb_event event;
1124 int evnt = FB_EVENT_MODE_CHANGE_ALL;
1125
1126 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1127 /* More framebuffer users are active */
1128 return;
1129
1130 fb_var_to_videomode(&mode, &info->var);
1131
1132 if (fb_mode_is_equal(&ch->display.mode, &mode))
1133 return;
1134
1135 /* Display has been re-plugged, framebuffer is free now, reconfigure */
1136 var = info->var;
1137 fb_videomode_to_var(&var, &ch->display.mode);
1138 var.width = ch->display.width;
1139 var.height = ch->display.height;
1140 var.activate = FB_ACTIVATE_NOW;
1141
1142 if (fb_set_var(info, &var) < 0)
1143 /* Couldn't reconfigure, hopefully, can continue as before */
1144 return;
1145
1146 /*
1147 * fb_set_var() calls the notifier change internally, only if
1148 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1149 * user event, we have to call the chain ourselves.
1150 */
1151 event.info = info;
1152 event.data = &ch->display.mode;
1153 fb_notifier_call_chain(evnt, &event);
1154 }
1155
1156 /*
1157 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1158 * user == 1, or with console sem held, if user == 0.
1159 */
1160 static int sh_mobile_release(struct fb_info *info, int user)
1161 {
1162 struct sh_mobile_lcdc_chan *ch = info->par;
1163
1164 mutex_lock(&ch->open_lock);
1165 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1166
1167 ch->use_count--;
1168
1169 /* Nothing to reconfigure, when called from fbcon */
1170 if (user) {
1171 console_lock();
1172 sh_mobile_fb_reconfig(info);
1173 console_unlock();
1174 }
1175
1176 mutex_unlock(&ch->open_lock);
1177
1178 return 0;
1179 }
1180
1181 static int sh_mobile_open(struct fb_info *info, int user)
1182 {
1183 struct sh_mobile_lcdc_chan *ch = info->par;
1184
1185 mutex_lock(&ch->open_lock);
1186 ch->use_count++;
1187
1188 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1189 mutex_unlock(&ch->open_lock);
1190
1191 return 0;
1192 }
1193
1194 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1195 {
1196 struct sh_mobile_lcdc_chan *ch = info->par;
1197 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1198 unsigned int best_dist = (unsigned int)-1;
1199 unsigned int best_xres = 0;
1200 unsigned int best_yres = 0;
1201 unsigned int i;
1202
1203 if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1204 return -EINVAL;
1205
1206 /* If board code provides us with a list of available modes, make sure
1207 * we use one of them. Find the mode closest to the requested one. The
1208 * distance between two modes is defined as the size of the
1209 * non-overlapping parts of the two rectangles.
1210 */
1211 for (i = 0; i < ch->cfg->num_modes; ++i) {
1212 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1213 unsigned int dist;
1214
1215 /* We can only round up. */
1216 if (var->xres > mode->xres || var->yres > mode->yres)
1217 continue;
1218
1219 dist = var->xres * var->yres + mode->xres * mode->yres
1220 - 2 * min(var->xres, mode->xres)
1221 * min(var->yres, mode->yres);
1222
1223 if (dist < best_dist) {
1224 best_xres = mode->xres;
1225 best_yres = mode->yres;
1226 best_dist = dist;
1227 }
1228 }
1229
1230 /* If no available mode can be used, return an error. */
1231 if (ch->cfg->num_modes != 0) {
1232 if (best_dist == (unsigned int)-1)
1233 return -EINVAL;
1234
1235 var->xres = best_xres;
1236 var->yres = best_yres;
1237 }
1238
1239 /* Make sure the virtual resolution is at least as big as the visible
1240 * resolution.
1241 */
1242 if (var->xres_virtual < var->xres)
1243 var->xres_virtual = var->xres;
1244 if (var->yres_virtual < var->yres)
1245 var->yres_virtual = var->yres;
1246
1247 if (sh_mobile_format_is_fourcc(var)) {
1248 const struct sh_mobile_lcdc_format_info *format;
1249
1250 format = sh_mobile_format_info(var->grayscale);
1251 if (format == NULL)
1252 return -EINVAL;
1253 var->bits_per_pixel = format->bpp;
1254
1255 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1256 * respectively.
1257 */
1258 if (!format->yuv)
1259 var->colorspace = V4L2_COLORSPACE_SRGB;
1260 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1261 var->colorspace = V4L2_COLORSPACE_JPEG;
1262 } else {
1263 if (var->bits_per_pixel <= 16) { /* RGB 565 */
1264 var->bits_per_pixel = 16;
1265 var->red.offset = 11;
1266 var->red.length = 5;
1267 var->green.offset = 5;
1268 var->green.length = 6;
1269 var->blue.offset = 0;
1270 var->blue.length = 5;
1271 var->transp.offset = 0;
1272 var->transp.length = 0;
1273 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */
1274 var->bits_per_pixel = 24;
1275 var->red.offset = 16;
1276 var->red.length = 8;
1277 var->green.offset = 8;
1278 var->green.length = 8;
1279 var->blue.offset = 0;
1280 var->blue.length = 8;
1281 var->transp.offset = 0;
1282 var->transp.length = 0;
1283 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
1284 var->bits_per_pixel = 32;
1285 var->red.offset = 16;
1286 var->red.length = 8;
1287 var->green.offset = 8;
1288 var->green.length = 8;
1289 var->blue.offset = 0;
1290 var->blue.length = 8;
1291 var->transp.offset = 24;
1292 var->transp.length = 8;
1293 } else
1294 return -EINVAL;
1295
1296 var->red.msb_right = 0;
1297 var->green.msb_right = 0;
1298 var->blue.msb_right = 0;
1299 var->transp.msb_right = 0;
1300 }
1301
1302 /* Make sure we don't exceed our allocated memory. */
1303 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1304 info->fix.smem_len)
1305 return -EINVAL;
1306
1307 /* only accept the forced_fourcc for dual channel configurations */
1308 if (p->forced_fourcc &&
1309 p->forced_fourcc != sh_mobile_format_fourcc(var))
1310 return -EINVAL;
1311
1312 return 0;
1313 }
1314
1315 static int sh_mobile_set_par(struct fb_info *info)
1316 {
1317 struct sh_mobile_lcdc_chan *ch = info->par;
1318 int ret;
1319
1320 sh_mobile_lcdc_stop(ch->lcdc);
1321
1322 ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1323 ch->colorspace = info->var.colorspace;
1324
1325 ch->xres = info->var.xres;
1326 ch->xres_virtual = info->var.xres_virtual;
1327 ch->yres = info->var.yres;
1328 ch->yres_virtual = info->var.yres_virtual;
1329
1330 if (ch->format->yuv)
1331 ch->pitch = info->var.xres;
1332 else
1333 ch->pitch = info->var.xres * ch->format->bpp / 8;
1334
1335 ret = sh_mobile_lcdc_start(ch->lcdc);
1336 if (ret < 0)
1337 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1338
1339 info->fix.line_length = ch->pitch;
1340
1341 if (sh_mobile_format_is_fourcc(&info->var)) {
1342 info->fix.type = FB_TYPE_FOURCC;
1343 info->fix.visual = FB_VISUAL_FOURCC;
1344 } else {
1345 info->fix.type = FB_TYPE_PACKED_PIXELS;
1346 info->fix.visual = FB_VISUAL_TRUECOLOR;
1347 }
1348
1349 return ret;
1350 }
1351
1352 /*
1353 * Screen blanking. Behavior is as follows:
1354 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1355 * FB_BLANK_NORMAL: screen blanked, clocks enabled
1356 * FB_BLANK_VSYNC,
1357 * FB_BLANK_HSYNC,
1358 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1359 */
1360 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1361 {
1362 struct sh_mobile_lcdc_chan *ch = info->par;
1363 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1364
1365 /* blank the screen? */
1366 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1367 struct fb_fillrect rect = {
1368 .width = ch->xres,
1369 .height = ch->yres,
1370 };
1371 sh_mobile_lcdc_fillrect(info, &rect);
1372 }
1373 /* turn clocks on? */
1374 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1375 sh_mobile_lcdc_clk_on(p);
1376 }
1377 /* turn clocks off? */
1378 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1379 /* make sure the screen is updated with the black fill before
1380 * switching the clocks off. one vsync is not enough since
1381 * blanking may occur in the middle of a refresh. deferred io
1382 * mode will reenable the clocks and update the screen in time,
1383 * so it does not need this. */
1384 if (!info->fbdefio) {
1385 sh_mobile_wait_for_vsync(ch);
1386 sh_mobile_wait_for_vsync(ch);
1387 }
1388 sh_mobile_lcdc_clk_off(p);
1389 }
1390
1391 ch->blank_status = blank;
1392 return 0;
1393 }
1394
1395 static struct fb_ops sh_mobile_lcdc_ops = {
1396 .owner = THIS_MODULE,
1397 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
1398 .fb_read = fb_sys_read,
1399 .fb_write = fb_sys_write,
1400 .fb_fillrect = sh_mobile_lcdc_fillrect,
1401 .fb_copyarea = sh_mobile_lcdc_copyarea,
1402 .fb_imageblit = sh_mobile_lcdc_imageblit,
1403 .fb_blank = sh_mobile_lcdc_blank,
1404 .fb_pan_display = sh_mobile_fb_pan_display,
1405 .fb_ioctl = sh_mobile_ioctl,
1406 .fb_open = sh_mobile_open,
1407 .fb_release = sh_mobile_release,
1408 .fb_check_var = sh_mobile_check_var,
1409 .fb_set_par = sh_mobile_set_par,
1410 };
1411
1412 static void
1413 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
1414 {
1415 if (ch->info && ch->info->dev)
1416 unregister_framebuffer(ch->info);
1417 }
1418
1419 static int __devinit
1420 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
1421 {
1422 struct fb_info *info = ch->info;
1423 int ret;
1424
1425 if (info->fbdefio) {
1426 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1427 ch->fb_size >> PAGE_SHIFT);
1428 if (!ch->sglist) {
1429 dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
1430 return -ENOMEM;
1431 }
1432 }
1433
1434 info->bl_dev = ch->bl;
1435
1436 ret = register_framebuffer(info);
1437 if (ret < 0)
1438 return ret;
1439
1440 dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
1441 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
1442 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
1443 info->var.bits_per_pixel);
1444
1445 /* deferred io mode: disable clock to save power */
1446 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1447 sh_mobile_lcdc_clk_off(ch->lcdc);
1448
1449 return ret;
1450 }
1451
1452 static void
1453 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
1454 {
1455 struct fb_info *info = ch->info;
1456
1457 if (!info || !info->device)
1458 return;
1459
1460 if (ch->sglist)
1461 vfree(ch->sglist);
1462
1463 fb_dealloc_cmap(&info->cmap);
1464 framebuffer_release(info);
1465 }
1466
1467 static int __devinit
1468 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
1469 const struct fb_videomode *mode,
1470 unsigned int num_modes)
1471 {
1472 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1473 struct fb_var_screeninfo *var;
1474 struct fb_info *info;
1475 int ret;
1476
1477 /* Allocate and initialize the frame buffer device. Create the modes
1478 * list and allocate the color map.
1479 */
1480 info = framebuffer_alloc(0, priv->dev);
1481 if (info == NULL) {
1482 dev_err(priv->dev, "unable to allocate fb_info\n");
1483 return -ENOMEM;
1484 }
1485
1486 ch->info = info;
1487
1488 info->flags = FBINFO_FLAG_DEFAULT;
1489 info->fbops = &sh_mobile_lcdc_ops;
1490 info->device = priv->dev;
1491 info->screen_base = ch->fb_mem;
1492 info->pseudo_palette = &ch->pseudo_palette;
1493 info->par = ch;
1494
1495 fb_videomode_to_modelist(mode, num_modes, &info->modelist);
1496
1497 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1498 if (ret < 0) {
1499 dev_err(priv->dev, "unable to allocate cmap\n");
1500 return ret;
1501 }
1502
1503 /* Initialize fixed screen information. Restrict pan to 2 lines steps
1504 * for NV12 and NV21.
1505 */
1506 info->fix = sh_mobile_lcdc_fix;
1507 info->fix.smem_start = ch->dma_handle;
1508 info->fix.smem_len = ch->fb_size;
1509 info->fix.line_length = ch->pitch;
1510
1511 if (ch->format->yuv)
1512 info->fix.visual = FB_VISUAL_FOURCC;
1513 else
1514 info->fix.visual = FB_VISUAL_TRUECOLOR;
1515
1516 if (ch->format->fourcc == V4L2_PIX_FMT_NV12 ||
1517 ch->format->fourcc == V4L2_PIX_FMT_NV21)
1518 info->fix.ypanstep = 2;
1519
1520 /* Initialize variable screen information using the first mode as
1521 * default. The default Y virtual resolution is twice the panel size to
1522 * allow for double-buffering.
1523 */
1524 var = &info->var;
1525 fb_videomode_to_var(var, mode);
1526 var->width = ch->cfg->panel_cfg.width;
1527 var->height = ch->cfg->panel_cfg.height;
1528 var->yres_virtual = var->yres * 2;
1529 var->activate = FB_ACTIVATE_NOW;
1530
1531 /* Use the legacy API by default for RGB formats, and the FOURCC API
1532 * for YUV formats.
1533 */
1534 if (!ch->format->yuv)
1535 var->bits_per_pixel = ch->format->bpp;
1536 else
1537 var->grayscale = ch->format->fourcc;
1538
1539 ret = sh_mobile_check_var(var, info);
1540 if (ret)
1541 return ret;
1542
1543 return 0;
1544 }
1545
1546 /* -----------------------------------------------------------------------------
1547 * Backlight
1548 */
1549
1550 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1551 {
1552 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1553 int brightness = bdev->props.brightness;
1554
1555 if (bdev->props.power != FB_BLANK_UNBLANK ||
1556 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1557 brightness = 0;
1558
1559 return ch->cfg->bl_info.set_brightness(brightness);
1560 }
1561
1562 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1563 {
1564 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1565
1566 return ch->cfg->bl_info.get_brightness();
1567 }
1568
1569 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1570 struct fb_info *info)
1571 {
1572 return (info->bl_dev == bdev);
1573 }
1574
1575 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1576 .options = BL_CORE_SUSPENDRESUME,
1577 .update_status = sh_mobile_lcdc_update_bl,
1578 .get_brightness = sh_mobile_lcdc_get_brightness,
1579 .check_fb = sh_mobile_lcdc_check_fb,
1580 };
1581
1582 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1583 struct sh_mobile_lcdc_chan *ch)
1584 {
1585 struct backlight_device *bl;
1586
1587 bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
1588 &sh_mobile_lcdc_bl_ops, NULL);
1589 if (IS_ERR(bl)) {
1590 dev_err(parent, "unable to register backlight device: %ld\n",
1591 PTR_ERR(bl));
1592 return NULL;
1593 }
1594
1595 bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
1596 bl->props.brightness = bl->props.max_brightness;
1597 backlight_update_status(bl);
1598
1599 return bl;
1600 }
1601
1602 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1603 {
1604 backlight_device_unregister(bdev);
1605 }
1606
1607 /* -----------------------------------------------------------------------------
1608 * Power management
1609 */
1610
1611 static int sh_mobile_lcdc_suspend(struct device *dev)
1612 {
1613 struct platform_device *pdev = to_platform_device(dev);
1614
1615 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1616 return 0;
1617 }
1618
1619 static int sh_mobile_lcdc_resume(struct device *dev)
1620 {
1621 struct platform_device *pdev = to_platform_device(dev);
1622
1623 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1624 }
1625
1626 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1627 {
1628 struct platform_device *pdev = to_platform_device(dev);
1629 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1630
1631 /* turn off LCDC hardware */
1632 lcdc_write(priv, _LDCNT1R, 0);
1633
1634 return 0;
1635 }
1636
1637 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1638 {
1639 struct platform_device *pdev = to_platform_device(dev);
1640 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1641
1642 __sh_mobile_lcdc_start(priv);
1643
1644 return 0;
1645 }
1646
1647 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1648 .suspend = sh_mobile_lcdc_suspend,
1649 .resume = sh_mobile_lcdc_resume,
1650 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1651 .runtime_resume = sh_mobile_lcdc_runtime_resume,
1652 };
1653
1654 /* -----------------------------------------------------------------------------
1655 * Framebuffer notifier
1656 */
1657
1658 /* locking: called with info->lock held */
1659 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1660 unsigned long action, void *data)
1661 {
1662 struct fb_event *event = data;
1663 struct fb_info *info = event->info;
1664 struct sh_mobile_lcdc_chan *ch = info->par;
1665
1666 if (&ch->lcdc->notifier != nb)
1667 return NOTIFY_DONE;
1668
1669 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1670 __func__, action, event->data);
1671
1672 switch(action) {
1673 case FB_EVENT_SUSPEND:
1674 sh_mobile_lcdc_display_off(ch);
1675 sh_mobile_lcdc_stop(ch->lcdc);
1676 break;
1677 case FB_EVENT_RESUME:
1678 mutex_lock(&ch->open_lock);
1679 sh_mobile_fb_reconfig(info);
1680 mutex_unlock(&ch->open_lock);
1681
1682 sh_mobile_lcdc_display_on(ch);
1683 sh_mobile_lcdc_start(ch->lcdc);
1684 }
1685
1686 return NOTIFY_OK;
1687 }
1688
1689 /* -----------------------------------------------------------------------------
1690 * Probe/remove and driver init/exit
1691 */
1692
1693 static const struct fb_videomode default_720p __devinitconst = {
1694 .name = "HDMI 720p",
1695 .xres = 1280,
1696 .yres = 720,
1697
1698 .left_margin = 220,
1699 .right_margin = 110,
1700 .hsync_len = 40,
1701
1702 .upper_margin = 20,
1703 .lower_margin = 5,
1704 .vsync_len = 5,
1705
1706 .pixclock = 13468,
1707 .refresh = 60,
1708 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
1709 };
1710
1711 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1712 {
1713 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1714 int i;
1715
1716 fb_unregister_client(&priv->notifier);
1717
1718 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1719 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
1720
1721 sh_mobile_lcdc_stop(priv);
1722
1723 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1724 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
1725
1726 if (ch->tx_dev) {
1727 ch->tx_dev->lcdc = NULL;
1728 module_put(ch->cfg->tx_dev->dev.driver->owner);
1729 }
1730
1731 sh_mobile_lcdc_channel_fb_cleanup(ch);
1732
1733 if (ch->fb_mem)
1734 dma_free_coherent(&pdev->dev, ch->fb_size,
1735 ch->fb_mem, ch->dma_handle);
1736 }
1737
1738 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1739 if (priv->ch[i].bl)
1740 sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1741 }
1742
1743 if (priv->dot_clk) {
1744 pm_runtime_disable(&pdev->dev);
1745 clk_put(priv->dot_clk);
1746 }
1747
1748 if (priv->base)
1749 iounmap(priv->base);
1750
1751 if (priv->irq)
1752 free_irq(priv->irq, priv);
1753 kfree(priv);
1754 return 0;
1755 }
1756
1757 static int __devinit sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
1758 {
1759 int interface_type = ch->cfg->interface_type;
1760
1761 switch (interface_type) {
1762 case RGB8:
1763 case RGB9:
1764 case RGB12A:
1765 case RGB12B:
1766 case RGB16:
1767 case RGB18:
1768 case RGB24:
1769 case SYS8A:
1770 case SYS8B:
1771 case SYS8C:
1772 case SYS8D:
1773 case SYS9:
1774 case SYS12:
1775 case SYS16A:
1776 case SYS16B:
1777 case SYS16C:
1778 case SYS18:
1779 case SYS24:
1780 break;
1781 default:
1782 return -EINVAL;
1783 }
1784
1785 /* SUBLCD only supports SYS interface */
1786 if (lcdc_chan_is_sublcd(ch)) {
1787 if (!(interface_type & LDMT1R_IFM))
1788 return -EINVAL;
1789
1790 interface_type &= ~LDMT1R_IFM;
1791 }
1792
1793 ch->ldmt1r_value = interface_type;
1794 return 0;
1795 }
1796
1797 static int __devinit
1798 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_priv *priv,
1799 struct sh_mobile_lcdc_chan *ch)
1800 {
1801 const struct sh_mobile_lcdc_format_info *format;
1802 const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
1803 const struct fb_videomode *max_mode;
1804 const struct fb_videomode *mode;
1805 unsigned int num_modes;
1806 unsigned int max_size;
1807 unsigned int i;
1808
1809 mutex_init(&ch->open_lock);
1810 ch->notify = sh_mobile_lcdc_display_notify;
1811
1812 /* Validate the format. */
1813 format = sh_mobile_format_info(cfg->fourcc);
1814 if (format == NULL) {
1815 dev_err(priv->dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
1816 return -EINVAL;
1817 }
1818
1819 /* Iterate through the modes to validate them and find the highest
1820 * resolution.
1821 */
1822 max_mode = NULL;
1823 max_size = 0;
1824
1825 for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
1826 unsigned int size = mode->yres * mode->xres;
1827
1828 /* NV12/NV21 buffers must have even number of lines */
1829 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
1830 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
1831 dev_err(priv->dev, "yres must be multiple of 2 for "
1832 "YCbCr420 mode.\n");
1833 return -EINVAL;
1834 }
1835
1836 if (size > max_size) {
1837 max_mode = mode;
1838 max_size = size;
1839 }
1840 }
1841
1842 if (!max_size)
1843 max_size = MAX_XRES * MAX_YRES;
1844 else
1845 dev_dbg(priv->dev, "Found largest videomode %ux%u\n",
1846 max_mode->xres, max_mode->yres);
1847
1848 if (cfg->lcd_modes == NULL) {
1849 mode = &default_720p;
1850 num_modes = 1;
1851 } else {
1852 mode = cfg->lcd_modes;
1853 num_modes = cfg->num_modes;
1854 }
1855
1856 /* Use the first mode as default. */
1857 ch->format = format;
1858 ch->xres = mode->xres;
1859 ch->xres_virtual = mode->xres;
1860 ch->yres = mode->yres;
1861 ch->yres_virtual = mode->yres * 2;
1862
1863 if (!format->yuv) {
1864 ch->colorspace = V4L2_COLORSPACE_SRGB;
1865 ch->pitch = ch->xres * format->bpp / 8;
1866 } else {
1867 ch->colorspace = V4L2_COLORSPACE_REC709;
1868 ch->pitch = ch->xres;
1869 }
1870
1871 ch->display.width = cfg->panel_cfg.width;
1872 ch->display.height = cfg->panel_cfg.height;
1873 ch->display.mode = *mode;
1874
1875 /* Allocate frame buffer memory. */
1876 ch->fb_size = max_size * format->bpp / 8 * 2;
1877 ch->fb_mem = dma_alloc_coherent(priv->dev, ch->fb_size, &ch->dma_handle,
1878 GFP_KERNEL);
1879 if (ch->fb_mem == NULL) {
1880 dev_err(priv->dev, "unable to allocate buffer\n");
1881 return -ENOMEM;
1882 }
1883
1884 /* Initialize the transmitter device if present. */
1885 if (cfg->tx_dev) {
1886 if (!cfg->tx_dev->dev.driver ||
1887 !try_module_get(cfg->tx_dev->dev.driver->owner)) {
1888 dev_warn(priv->dev,
1889 "unable to get transmitter device\n");
1890 return -EINVAL;
1891 }
1892 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
1893 ch->tx_dev->lcdc = ch;
1894 ch->tx_dev->def_mode = *mode;
1895 }
1896
1897 return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
1898 }
1899
1900 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1901 {
1902 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1903 struct sh_mobile_lcdc_priv *priv;
1904 struct resource *res;
1905 int num_channels;
1906 int error;
1907 int i;
1908
1909 if (!pdata) {
1910 dev_err(&pdev->dev, "no platform data defined\n");
1911 return -EINVAL;
1912 }
1913
1914 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1915 i = platform_get_irq(pdev, 0);
1916 if (!res || i < 0) {
1917 dev_err(&pdev->dev, "cannot get platform resources\n");
1918 return -ENOENT;
1919 }
1920
1921 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1922 if (!priv) {
1923 dev_err(&pdev->dev, "cannot allocate device data\n");
1924 return -ENOMEM;
1925 }
1926
1927 priv->dev = &pdev->dev;
1928 priv->meram_dev = pdata->meram_dev;
1929 platform_set_drvdata(pdev, priv);
1930
1931 error = request_irq(i, sh_mobile_lcdc_irq, 0,
1932 dev_name(&pdev->dev), priv);
1933 if (error) {
1934 dev_err(&pdev->dev, "unable to request irq\n");
1935 goto err1;
1936 }
1937
1938 priv->irq = i;
1939 atomic_set(&priv->hw_usecnt, -1);
1940
1941 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1942 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
1943
1944 ch->lcdc = priv;
1945 ch->cfg = &pdata->ch[i];
1946
1947 error = sh_mobile_lcdc_check_interface(ch);
1948 if (error) {
1949 dev_err(&pdev->dev, "unsupported interface type\n");
1950 goto err1;
1951 }
1952 init_waitqueue_head(&ch->frame_end_wait);
1953 init_completion(&ch->vsync_completion);
1954 ch->pan_offset = 0;
1955
1956 /* probe the backlight is there is one defined */
1957 if (ch->cfg->bl_info.max_brightness)
1958 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1959
1960 switch (pdata->ch[i].chan) {
1961 case LCDC_CHAN_MAINLCD:
1962 ch->enabled = LDCNT2R_ME;
1963 ch->reg_offs = lcdc_offs_mainlcd;
1964 num_channels++;
1965 break;
1966 case LCDC_CHAN_SUBLCD:
1967 ch->enabled = LDCNT2R_SE;
1968 ch->reg_offs = lcdc_offs_sublcd;
1969 num_channels++;
1970 break;
1971 }
1972 }
1973
1974 if (!num_channels) {
1975 dev_err(&pdev->dev, "no channels defined\n");
1976 error = -EINVAL;
1977 goto err1;
1978 }
1979
1980 /* for dual channel LCDC (MAIN + SUB) force shared format setting */
1981 if (num_channels == 2)
1982 priv->forced_fourcc = pdata->ch[0].fourcc;
1983
1984 priv->base = ioremap_nocache(res->start, resource_size(res));
1985 if (!priv->base)
1986 goto err1;
1987
1988 error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
1989 if (error) {
1990 dev_err(&pdev->dev, "unable to setup clocks\n");
1991 goto err1;
1992 }
1993
1994 /* Enable runtime PM. */
1995 pm_runtime_enable(&pdev->dev);
1996
1997 for (i = 0; i < num_channels; i++) {
1998 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1999
2000 error = sh_mobile_lcdc_channel_init(priv, ch);
2001 if (error)
2002 goto err1;
2003 }
2004
2005 error = sh_mobile_lcdc_start(priv);
2006 if (error) {
2007 dev_err(&pdev->dev, "unable to start hardware\n");
2008 goto err1;
2009 }
2010
2011 for (i = 0; i < num_channels; i++) {
2012 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2013
2014 error = sh_mobile_lcdc_channel_fb_register(ch);
2015 if (error)
2016 goto err1;
2017 }
2018
2019 /* Failure ignored */
2020 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2021 fb_register_client(&priv->notifier);
2022
2023 return 0;
2024 err1:
2025 sh_mobile_lcdc_remove(pdev);
2026
2027 return error;
2028 }
2029
2030 static struct platform_driver sh_mobile_lcdc_driver = {
2031 .driver = {
2032 .name = "sh_mobile_lcdc_fb",
2033 .owner = THIS_MODULE,
2034 .pm = &sh_mobile_lcdc_dev_pm_ops,
2035 },
2036 .probe = sh_mobile_lcdc_probe,
2037 .remove = sh_mobile_lcdc_remove,
2038 };
2039
2040 module_platform_driver(sh_mobile_lcdc_driver);
2041
2042 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2043 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2044 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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