Commit | Line | Data |
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7eb8f069 AH |
1 | /* |
2 | * Samsung SoC MIPI DSI Master driver. | |
3 | * | |
4 | * Copyright (c) 2014 Samsung Electronics Co., Ltd | |
5 | * | |
6 | * Contacts: Tomasz Figa <t.figa@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <drm/drmP.h> | |
14 | #include <drm/drm_crtc_helper.h> | |
15 | #include <drm/drm_mipi_dsi.h> | |
16 | #include <drm/drm_panel.h> | |
17 | ||
18 | #include <linux/clk.h> | |
e17ddecc | 19 | #include <linux/gpio/consumer.h> |
7eb8f069 | 20 | #include <linux/irq.h> |
9a320415 | 21 | #include <linux/of_device.h> |
e17ddecc | 22 | #include <linux/of_gpio.h> |
7eb8f069 AH |
23 | #include <linux/phy/phy.h> |
24 | #include <linux/regulator/consumer.h> | |
f37cd5e8 | 25 | #include <linux/component.h> |
7eb8f069 AH |
26 | |
27 | #include <video/mipi_display.h> | |
28 | #include <video/videomode.h> | |
29 | ||
e17ddecc | 30 | #include "exynos_drm_crtc.h" |
7eb8f069 AH |
31 | #include "exynos_drm_drv.h" |
32 | ||
33 | /* returns true iff both arguments logically differs */ | |
34 | #define NEQV(a, b) (!(a) ^ !(b)) | |
35 | ||
36 | #define DSIM_STATUS_REG 0x0 /* Status register */ | |
37 | #define DSIM_SWRST_REG 0x4 /* Software reset register */ | |
38 | #define DSIM_CLKCTRL_REG 0x8 /* Clock control register */ | |
39 | #define DSIM_TIMEOUT_REG 0xc /* Time out register */ | |
40 | #define DSIM_CONFIG_REG 0x10 /* Configuration register */ | |
41 | #define DSIM_ESCMODE_REG 0x14 /* Escape mode register */ | |
42 | ||
43 | /* Main display image resolution register */ | |
44 | #define DSIM_MDRESOL_REG 0x18 | |
45 | #define DSIM_MVPORCH_REG 0x1c /* Main display Vporch register */ | |
46 | #define DSIM_MHPORCH_REG 0x20 /* Main display Hporch register */ | |
47 | #define DSIM_MSYNC_REG 0x24 /* Main display sync area register */ | |
48 | ||
49 | /* Sub display image resolution register */ | |
50 | #define DSIM_SDRESOL_REG 0x28 | |
51 | #define DSIM_INTSRC_REG 0x2c /* Interrupt source register */ | |
52 | #define DSIM_INTMSK_REG 0x30 /* Interrupt mask register */ | |
53 | #define DSIM_PKTHDR_REG 0x34 /* Packet Header FIFO register */ | |
54 | #define DSIM_PAYLOAD_REG 0x38 /* Payload FIFO register */ | |
55 | #define DSIM_RXFIFO_REG 0x3c /* Read FIFO register */ | |
56 | #define DSIM_FIFOTHLD_REG 0x40 /* FIFO threshold level register */ | |
57 | #define DSIM_FIFOCTRL_REG 0x44 /* FIFO status and control register */ | |
58 | ||
59 | /* FIFO memory AC characteristic register */ | |
60 | #define DSIM_PLLCTRL_REG 0x4c /* PLL control register */ | |
7eb8f069 AH |
61 | #define DSIM_PHYACCHR_REG 0x54 /* D-PHY AC characteristic register */ |
62 | #define DSIM_PHYACCHR1_REG 0x58 /* D-PHY AC characteristic register1 */ | |
9a320415 YC |
63 | #define DSIM_PHYCTRL_REG 0x5c |
64 | #define DSIM_PHYTIMING_REG 0x64 | |
65 | #define DSIM_PHYTIMING1_REG 0x68 | |
66 | #define DSIM_PHYTIMING2_REG 0x6c | |
7eb8f069 AH |
67 | |
68 | /* DSIM_STATUS */ | |
69 | #define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0) | |
70 | #define DSIM_STOP_STATE_CLK (1 << 8) | |
71 | #define DSIM_TX_READY_HS_CLK (1 << 10) | |
72 | #define DSIM_PLL_STABLE (1 << 31) | |
73 | ||
74 | /* DSIM_SWRST */ | |
75 | #define DSIM_FUNCRST (1 << 16) | |
76 | #define DSIM_SWRST (1 << 0) | |
77 | ||
78 | /* DSIM_TIMEOUT */ | |
79 | #define DSIM_LPDR_TIMEOUT(x) ((x) << 0) | |
80 | #define DSIM_BTA_TIMEOUT(x) ((x) << 16) | |
81 | ||
82 | /* DSIM_CLKCTRL */ | |
83 | #define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0) | |
84 | #define DSIM_ESC_PRESCALER_MASK (0xffff << 0) | |
85 | #define DSIM_LANE_ESC_CLK_EN_CLK (1 << 19) | |
86 | #define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20) | |
87 | #define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20) | |
88 | #define DSIM_BYTE_CLKEN (1 << 24) | |
89 | #define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25) | |
90 | #define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25) | |
91 | #define DSIM_PLL_BYPASS (1 << 27) | |
92 | #define DSIM_ESC_CLKEN (1 << 28) | |
93 | #define DSIM_TX_REQUEST_HSCLK (1 << 31) | |
94 | ||
95 | /* DSIM_CONFIG */ | |
96 | #define DSIM_LANE_EN_CLK (1 << 0) | |
97 | #define DSIM_LANE_EN(x) (((x) & 0xf) << 1) | |
98 | #define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5) | |
99 | #define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8) | |
100 | #define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12) | |
101 | #define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12) | |
102 | #define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12) | |
103 | #define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12) | |
104 | #define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12) | |
105 | #define DSIM_SUB_VC (((x) & 0x3) << 16) | |
106 | #define DSIM_MAIN_VC (((x) & 0x3) << 18) | |
107 | #define DSIM_HSA_MODE (1 << 20) | |
108 | #define DSIM_HBP_MODE (1 << 21) | |
109 | #define DSIM_HFP_MODE (1 << 22) | |
110 | #define DSIM_HSE_MODE (1 << 23) | |
111 | #define DSIM_AUTO_MODE (1 << 24) | |
112 | #define DSIM_VIDEO_MODE (1 << 25) | |
113 | #define DSIM_BURST_MODE (1 << 26) | |
114 | #define DSIM_SYNC_INFORM (1 << 27) | |
115 | #define DSIM_EOT_DISABLE (1 << 28) | |
116 | #define DSIM_MFLUSH_VS (1 << 29) | |
78d3a8c6 ID |
117 | /* This flag is valid only for exynos3250/3472/4415/5260/5430 */ |
118 | #define DSIM_CLKLANE_STOP (1 << 30) | |
7eb8f069 AH |
119 | |
120 | /* DSIM_ESCMODE */ | |
121 | #define DSIM_TX_TRIGGER_RST (1 << 4) | |
122 | #define DSIM_TX_LPDT_LP (1 << 6) | |
123 | #define DSIM_CMD_LPDT_LP (1 << 7) | |
124 | #define DSIM_FORCE_BTA (1 << 16) | |
125 | #define DSIM_FORCE_STOP_STATE (1 << 20) | |
126 | #define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21) | |
127 | #define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21) | |
128 | ||
129 | /* DSIM_MDRESOL */ | |
130 | #define DSIM_MAIN_STAND_BY (1 << 31) | |
131 | #define DSIM_MAIN_VRESOL(x) (((x) & 0x7ff) << 16) | |
132 | #define DSIM_MAIN_HRESOL(x) (((x) & 0X7ff) << 0) | |
133 | ||
134 | /* DSIM_MVPORCH */ | |
135 | #define DSIM_CMD_ALLOW(x) ((x) << 28) | |
136 | #define DSIM_STABLE_VFP(x) ((x) << 16) | |
137 | #define DSIM_MAIN_VBP(x) ((x) << 0) | |
138 | #define DSIM_CMD_ALLOW_MASK (0xf << 28) | |
139 | #define DSIM_STABLE_VFP_MASK (0x7ff << 16) | |
140 | #define DSIM_MAIN_VBP_MASK (0x7ff << 0) | |
141 | ||
142 | /* DSIM_MHPORCH */ | |
143 | #define DSIM_MAIN_HFP(x) ((x) << 16) | |
144 | #define DSIM_MAIN_HBP(x) ((x) << 0) | |
145 | #define DSIM_MAIN_HFP_MASK ((0xffff) << 16) | |
146 | #define DSIM_MAIN_HBP_MASK ((0xffff) << 0) | |
147 | ||
148 | /* DSIM_MSYNC */ | |
149 | #define DSIM_MAIN_VSA(x) ((x) << 22) | |
150 | #define DSIM_MAIN_HSA(x) ((x) << 0) | |
151 | #define DSIM_MAIN_VSA_MASK ((0x3ff) << 22) | |
152 | #define DSIM_MAIN_HSA_MASK ((0xffff) << 0) | |
153 | ||
154 | /* DSIM_SDRESOL */ | |
155 | #define DSIM_SUB_STANDY(x) ((x) << 31) | |
156 | #define DSIM_SUB_VRESOL(x) ((x) << 16) | |
157 | #define DSIM_SUB_HRESOL(x) ((x) << 0) | |
158 | #define DSIM_SUB_STANDY_MASK ((0x1) << 31) | |
159 | #define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16) | |
160 | #define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0) | |
161 | ||
162 | /* DSIM_INTSRC */ | |
163 | #define DSIM_INT_PLL_STABLE (1 << 31) | |
164 | #define DSIM_INT_SW_RST_RELEASE (1 << 30) | |
165 | #define DSIM_INT_SFR_FIFO_EMPTY (1 << 29) | |
166 | #define DSIM_INT_BTA (1 << 25) | |
167 | #define DSIM_INT_FRAME_DONE (1 << 24) | |
168 | #define DSIM_INT_RX_TIMEOUT (1 << 21) | |
169 | #define DSIM_INT_BTA_TIMEOUT (1 << 20) | |
170 | #define DSIM_INT_RX_DONE (1 << 18) | |
171 | #define DSIM_INT_RX_TE (1 << 17) | |
172 | #define DSIM_INT_RX_ACK (1 << 16) | |
173 | #define DSIM_INT_RX_ECC_ERR (1 << 15) | |
174 | #define DSIM_INT_RX_CRC_ERR (1 << 14) | |
175 | ||
176 | /* DSIM_FIFOCTRL */ | |
177 | #define DSIM_RX_DATA_FULL (1 << 25) | |
178 | #define DSIM_RX_DATA_EMPTY (1 << 24) | |
179 | #define DSIM_SFR_HEADER_FULL (1 << 23) | |
180 | #define DSIM_SFR_HEADER_EMPTY (1 << 22) | |
181 | #define DSIM_SFR_PAYLOAD_FULL (1 << 21) | |
182 | #define DSIM_SFR_PAYLOAD_EMPTY (1 << 20) | |
183 | #define DSIM_I80_HEADER_FULL (1 << 19) | |
184 | #define DSIM_I80_HEADER_EMPTY (1 << 18) | |
185 | #define DSIM_I80_PAYLOAD_FULL (1 << 17) | |
186 | #define DSIM_I80_PAYLOAD_EMPTY (1 << 16) | |
187 | #define DSIM_SD_HEADER_FULL (1 << 15) | |
188 | #define DSIM_SD_HEADER_EMPTY (1 << 14) | |
189 | #define DSIM_SD_PAYLOAD_FULL (1 << 13) | |
190 | #define DSIM_SD_PAYLOAD_EMPTY (1 << 12) | |
191 | #define DSIM_MD_HEADER_FULL (1 << 11) | |
192 | #define DSIM_MD_HEADER_EMPTY (1 << 10) | |
193 | #define DSIM_MD_PAYLOAD_FULL (1 << 9) | |
194 | #define DSIM_MD_PAYLOAD_EMPTY (1 << 8) | |
195 | #define DSIM_RX_FIFO (1 << 4) | |
196 | #define DSIM_SFR_FIFO (1 << 3) | |
197 | #define DSIM_I80_FIFO (1 << 2) | |
198 | #define DSIM_SD_FIFO (1 << 1) | |
199 | #define DSIM_MD_FIFO (1 << 0) | |
200 | ||
201 | /* DSIM_PHYACCHR */ | |
202 | #define DSIM_AFC_EN (1 << 14) | |
203 | #define DSIM_AFC_CTL(x) (((x) & 0x7) << 5) | |
204 | ||
205 | /* DSIM_PLLCTRL */ | |
206 | #define DSIM_FREQ_BAND(x) ((x) << 24) | |
207 | #define DSIM_PLL_EN (1 << 23) | |
208 | #define DSIM_PLL_P(x) ((x) << 13) | |
209 | #define DSIM_PLL_M(x) ((x) << 4) | |
210 | #define DSIM_PLL_S(x) ((x) << 1) | |
211 | ||
9a320415 YC |
212 | /* DSIM_PHYCTRL */ |
213 | #define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0) | |
214 | ||
215 | /* DSIM_PHYTIMING */ | |
216 | #define DSIM_PHYTIMING_LPX(x) ((x) << 8) | |
217 | #define DSIM_PHYTIMING_HS_EXIT(x) ((x) << 0) | |
218 | ||
219 | /* DSIM_PHYTIMING1 */ | |
220 | #define DSIM_PHYTIMING1_CLK_PREPARE(x) ((x) << 24) | |
221 | #define DSIM_PHYTIMING1_CLK_ZERO(x) ((x) << 16) | |
222 | #define DSIM_PHYTIMING1_CLK_POST(x) ((x) << 8) | |
223 | #define DSIM_PHYTIMING1_CLK_TRAIL(x) ((x) << 0) | |
224 | ||
225 | /* DSIM_PHYTIMING2 */ | |
226 | #define DSIM_PHYTIMING2_HS_PREPARE(x) ((x) << 16) | |
227 | #define DSIM_PHYTIMING2_HS_ZERO(x) ((x) << 8) | |
228 | #define DSIM_PHYTIMING2_HS_TRAIL(x) ((x) << 0) | |
229 | ||
7eb8f069 AH |
230 | #define DSI_MAX_BUS_WIDTH 4 |
231 | #define DSI_NUM_VIRTUAL_CHANNELS 4 | |
232 | #define DSI_TX_FIFO_SIZE 2048 | |
233 | #define DSI_RX_FIFO_SIZE 256 | |
234 | #define DSI_XFER_TIMEOUT_MS 100 | |
235 | #define DSI_RX_FIFO_EMPTY 0x30800002 | |
236 | ||
237 | enum exynos_dsi_transfer_type { | |
238 | EXYNOS_DSI_TX, | |
239 | EXYNOS_DSI_RX, | |
240 | }; | |
241 | ||
242 | struct exynos_dsi_transfer { | |
243 | struct list_head list; | |
244 | struct completion completed; | |
245 | int result; | |
246 | u8 data_id; | |
247 | u8 data[2]; | |
248 | u16 flags; | |
249 | ||
250 | const u8 *tx_payload; | |
251 | u16 tx_len; | |
252 | u16 tx_done; | |
253 | ||
254 | u8 *rx_payload; | |
255 | u16 rx_len; | |
256 | u16 rx_done; | |
257 | }; | |
258 | ||
259 | #define DSIM_STATE_ENABLED BIT(0) | |
260 | #define DSIM_STATE_INITIALIZED BIT(1) | |
261 | #define DSIM_STATE_CMD_LPM BIT(2) | |
262 | ||
9a320415 YC |
263 | struct exynos_dsi_driver_data { |
264 | unsigned int plltmr_reg; | |
265 | ||
266 | unsigned int has_freqband:1; | |
78d3a8c6 | 267 | unsigned int has_clklane_stop:1; |
9a320415 YC |
268 | }; |
269 | ||
7eb8f069 | 270 | struct exynos_dsi { |
2900c69c | 271 | struct exynos_drm_display display; |
7eb8f069 AH |
272 | struct mipi_dsi_host dsi_host; |
273 | struct drm_connector connector; | |
7eb8f069 AH |
274 | struct device_node *panel_node; |
275 | struct drm_panel *panel; | |
276 | struct device *dev; | |
277 | ||
278 | void __iomem *reg_base; | |
279 | struct phy *phy; | |
280 | struct clk *pll_clk; | |
281 | struct clk *bus_clk; | |
282 | struct regulator_bulk_data supplies[2]; | |
283 | int irq; | |
e17ddecc | 284 | int te_gpio; |
7eb8f069 AH |
285 | |
286 | u32 pll_clk_rate; | |
287 | u32 burst_clk_rate; | |
288 | u32 esc_clk_rate; | |
289 | u32 lanes; | |
290 | u32 mode_flags; | |
291 | u32 format; | |
292 | struct videomode vm; | |
293 | ||
294 | int state; | |
295 | struct drm_property *brightness; | |
296 | struct completion completed; | |
297 | ||
298 | spinlock_t transfer_lock; /* protects transfer_list */ | |
299 | struct list_head transfer_list; | |
9a320415 YC |
300 | |
301 | struct exynos_dsi_driver_data *driver_data; | |
7eb8f069 AH |
302 | }; |
303 | ||
304 | #define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host) | |
305 | #define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector) | |
306 | ||
5cd5db80 AH |
307 | static inline struct exynos_dsi *display_to_dsi(struct exynos_drm_display *d) |
308 | { | |
309 | return container_of(d, struct exynos_dsi, display); | |
310 | } | |
311 | ||
473462a1 ID |
312 | static struct exynos_dsi_driver_data exynos3_dsi_driver_data = { |
313 | .plltmr_reg = 0x50, | |
314 | .has_freqband = 1, | |
315 | .has_clklane_stop = 1, | |
316 | }; | |
317 | ||
9a320415 YC |
318 | static struct exynos_dsi_driver_data exynos4_dsi_driver_data = { |
319 | .plltmr_reg = 0x50, | |
320 | .has_freqband = 1, | |
78d3a8c6 | 321 | .has_clklane_stop = 1, |
9a320415 YC |
322 | }; |
323 | ||
4bc6d644 YC |
324 | static struct exynos_dsi_driver_data exynos4415_dsi_driver_data = { |
325 | .plltmr_reg = 0x58, | |
326 | .has_clklane_stop = 1, | |
327 | }; | |
328 | ||
9a320415 YC |
329 | static struct exynos_dsi_driver_data exynos5_dsi_driver_data = { |
330 | .plltmr_reg = 0x58, | |
331 | }; | |
332 | ||
333 | static struct of_device_id exynos_dsi_of_match[] = { | |
473462a1 ID |
334 | { .compatible = "samsung,exynos3250-mipi-dsi", |
335 | .data = &exynos3_dsi_driver_data }, | |
9a320415 YC |
336 | { .compatible = "samsung,exynos4210-mipi-dsi", |
337 | .data = &exynos4_dsi_driver_data }, | |
4bc6d644 YC |
338 | { .compatible = "samsung,exynos4415-mipi-dsi", |
339 | .data = &exynos4415_dsi_driver_data }, | |
9a320415 YC |
340 | { .compatible = "samsung,exynos5410-mipi-dsi", |
341 | .data = &exynos5_dsi_driver_data }, | |
342 | { } | |
343 | }; | |
344 | ||
345 | static inline struct exynos_dsi_driver_data *exynos_dsi_get_driver_data( | |
346 | struct platform_device *pdev) | |
347 | { | |
348 | const struct of_device_id *of_id = | |
349 | of_match_device(exynos_dsi_of_match, &pdev->dev); | |
350 | ||
351 | return (struct exynos_dsi_driver_data *)of_id->data; | |
352 | } | |
353 | ||
7eb8f069 AH |
354 | static void exynos_dsi_wait_for_reset(struct exynos_dsi *dsi) |
355 | { | |
356 | if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300))) | |
357 | return; | |
358 | ||
359 | dev_err(dsi->dev, "timeout waiting for reset\n"); | |
360 | } | |
361 | ||
362 | static void exynos_dsi_reset(struct exynos_dsi *dsi) | |
363 | { | |
364 | reinit_completion(&dsi->completed); | |
365 | writel(DSIM_SWRST, dsi->reg_base + DSIM_SWRST_REG); | |
366 | } | |
367 | ||
368 | #ifndef MHZ | |
369 | #define MHZ (1000*1000) | |
370 | #endif | |
371 | ||
372 | static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi, | |
373 | unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s) | |
374 | { | |
375 | unsigned long best_freq = 0; | |
376 | u32 min_delta = 0xffffffff; | |
377 | u8 p_min, p_max; | |
378 | u8 _p, uninitialized_var(best_p); | |
379 | u16 _m, uninitialized_var(best_m); | |
380 | u8 _s, uninitialized_var(best_s); | |
381 | ||
382 | p_min = DIV_ROUND_UP(fin, (12 * MHZ)); | |
383 | p_max = fin / (6 * MHZ); | |
384 | ||
385 | for (_p = p_min; _p <= p_max; ++_p) { | |
386 | for (_s = 0; _s <= 5; ++_s) { | |
387 | u64 tmp; | |
388 | u32 delta; | |
389 | ||
390 | tmp = (u64)fout * (_p << _s); | |
391 | do_div(tmp, fin); | |
392 | _m = tmp; | |
393 | if (_m < 41 || _m > 125) | |
394 | continue; | |
395 | ||
396 | tmp = (u64)_m * fin; | |
397 | do_div(tmp, _p); | |
398 | if (tmp < 500 * MHZ || tmp > 1000 * MHZ) | |
399 | continue; | |
400 | ||
401 | tmp = (u64)_m * fin; | |
402 | do_div(tmp, _p << _s); | |
403 | ||
404 | delta = abs(fout - tmp); | |
405 | if (delta < min_delta) { | |
406 | best_p = _p; | |
407 | best_m = _m; | |
408 | best_s = _s; | |
409 | min_delta = delta; | |
410 | best_freq = tmp; | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | if (best_freq) { | |
416 | *p = best_p; | |
417 | *m = best_m; | |
418 | *s = best_s; | |
419 | } | |
420 | ||
421 | return best_freq; | |
422 | } | |
423 | ||
424 | static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi, | |
425 | unsigned long freq) | |
426 | { | |
9a320415 | 427 | struct exynos_dsi_driver_data *driver_data = dsi->driver_data; |
7eb8f069 | 428 | unsigned long fin, fout; |
9a320415 | 429 | int timeout; |
7eb8f069 AH |
430 | u8 p, s; |
431 | u16 m; | |
432 | u32 reg; | |
433 | ||
434 | clk_set_rate(dsi->pll_clk, dsi->pll_clk_rate); | |
435 | ||
436 | fin = clk_get_rate(dsi->pll_clk); | |
437 | if (!fin) { | |
438 | dev_err(dsi->dev, "failed to get PLL clock frequency\n"); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | dev_dbg(dsi->dev, "PLL input frequency: %lu\n", fin); | |
443 | ||
444 | fout = exynos_dsi_pll_find_pms(dsi, fin, freq, &p, &m, &s); | |
445 | if (!fout) { | |
446 | dev_err(dsi->dev, | |
447 | "failed to find PLL PMS for requested frequency\n"); | |
8525b5ec | 448 | return 0; |
7eb8f069 | 449 | } |
9a320415 | 450 | dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s); |
7eb8f069 | 451 | |
9a320415 YC |
452 | writel(500, dsi->reg_base + driver_data->plltmr_reg); |
453 | ||
454 | reg = DSIM_PLL_EN | DSIM_PLL_P(p) | DSIM_PLL_M(m) | DSIM_PLL_S(s); | |
455 | ||
456 | if (driver_data->has_freqband) { | |
457 | static const unsigned long freq_bands[] = { | |
458 | 100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ, | |
459 | 270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ, | |
460 | 510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ, | |
461 | 770 * MHZ, 870 * MHZ, 950 * MHZ, | |
462 | }; | |
463 | int band; | |
7eb8f069 | 464 | |
9a320415 YC |
465 | for (band = 0; band < ARRAY_SIZE(freq_bands); ++band) |
466 | if (fout < freq_bands[band]) | |
467 | break; | |
7eb8f069 | 468 | |
9a320415 YC |
469 | dev_dbg(dsi->dev, "band %d\n", band); |
470 | ||
471 | reg |= DSIM_FREQ_BAND(band); | |
472 | } | |
7eb8f069 | 473 | |
7eb8f069 AH |
474 | writel(reg, dsi->reg_base + DSIM_PLLCTRL_REG); |
475 | ||
476 | timeout = 1000; | |
477 | do { | |
478 | if (timeout-- == 0) { | |
479 | dev_err(dsi->dev, "PLL failed to stabilize\n"); | |
8525b5ec | 480 | return 0; |
7eb8f069 AH |
481 | } |
482 | reg = readl(dsi->reg_base + DSIM_STATUS_REG); | |
483 | } while ((reg & DSIM_PLL_STABLE) == 0); | |
484 | ||
485 | return fout; | |
486 | } | |
487 | ||
488 | static int exynos_dsi_enable_clock(struct exynos_dsi *dsi) | |
489 | { | |
490 | unsigned long hs_clk, byte_clk, esc_clk; | |
491 | unsigned long esc_div; | |
492 | u32 reg; | |
493 | ||
494 | hs_clk = exynos_dsi_set_pll(dsi, dsi->burst_clk_rate); | |
495 | if (!hs_clk) { | |
496 | dev_err(dsi->dev, "failed to configure DSI PLL\n"); | |
497 | return -EFAULT; | |
498 | } | |
499 | ||
500 | byte_clk = hs_clk / 8; | |
501 | esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate); | |
502 | esc_clk = byte_clk / esc_div; | |
503 | ||
504 | if (esc_clk > 20 * MHZ) { | |
505 | ++esc_div; | |
506 | esc_clk = byte_clk / esc_div; | |
507 | } | |
508 | ||
509 | dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n", | |
510 | hs_clk, byte_clk, esc_clk); | |
511 | ||
512 | reg = readl(dsi->reg_base + DSIM_CLKCTRL_REG); | |
513 | reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK | |
514 | | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS | |
515 | | DSIM_BYTE_CLK_SRC_MASK); | |
516 | reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN | |
517 | | DSIM_ESC_PRESCALER(esc_div) | |
518 | | DSIM_LANE_ESC_CLK_EN_CLK | |
519 | | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1) | |
520 | | DSIM_BYTE_CLK_SRC(0) | |
521 | | DSIM_TX_REQUEST_HSCLK; | |
522 | writel(reg, dsi->reg_base + DSIM_CLKCTRL_REG); | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
9a320415 YC |
527 | static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi) |
528 | { | |
529 | struct exynos_dsi_driver_data *driver_data = dsi->driver_data; | |
530 | u32 reg; | |
531 | ||
532 | if (driver_data->has_freqband) | |
533 | return; | |
534 | ||
535 | /* B D-PHY: D-PHY Master & Slave Analog Block control */ | |
536 | reg = DSIM_PHYCTRL_ULPS_EXIT(0x0af); | |
537 | writel(reg, dsi->reg_base + DSIM_PHYCTRL_REG); | |
538 | ||
539 | /* | |
540 | * T LPX: Transmitted length of any Low-Power state period | |
541 | * T HS-EXIT: Time that the transmitter drives LP-11 following a HS | |
542 | * burst | |
543 | */ | |
544 | reg = DSIM_PHYTIMING_LPX(0x06) | DSIM_PHYTIMING_HS_EXIT(0x0b); | |
545 | writel(reg, dsi->reg_base + DSIM_PHYTIMING_REG); | |
546 | ||
547 | /* | |
548 | * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00 | |
549 | * Line state immediately before the HS-0 Line state starting the | |
550 | * HS transmission | |
551 | * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to | |
552 | * transmitting the Clock. | |
553 | * T CLK_POST: Time that the transmitter continues to send HS clock | |
554 | * after the last associated Data Lane has transitioned to LP Mode | |
555 | * Interval is defined as the period from the end of T HS-TRAIL to | |
556 | * the beginning of T CLK-TRAIL | |
557 | * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after | |
558 | * the last payload clock bit of a HS transmission burst | |
559 | */ | |
560 | reg = DSIM_PHYTIMING1_CLK_PREPARE(0x07) | | |
561 | DSIM_PHYTIMING1_CLK_ZERO(0x27) | | |
562 | DSIM_PHYTIMING1_CLK_POST(0x0d) | | |
563 | DSIM_PHYTIMING1_CLK_TRAIL(0x08); | |
564 | writel(reg, dsi->reg_base + DSIM_PHYTIMING1_REG); | |
565 | ||
566 | /* | |
567 | * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00 | |
568 | * Line state immediately before the HS-0 Line state starting the | |
569 | * HS transmission | |
570 | * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to | |
571 | * transmitting the Sync sequence. | |
572 | * T HS-TRAIL: Time that the transmitter drives the flipped differential | |
573 | * state after last payload data bit of a HS transmission burst | |
574 | */ | |
575 | reg = DSIM_PHYTIMING2_HS_PREPARE(0x09) | DSIM_PHYTIMING2_HS_ZERO(0x0d) | | |
576 | DSIM_PHYTIMING2_HS_TRAIL(0x0b); | |
577 | writel(reg, dsi->reg_base + DSIM_PHYTIMING2_REG); | |
578 | } | |
579 | ||
7eb8f069 AH |
580 | static void exynos_dsi_disable_clock(struct exynos_dsi *dsi) |
581 | { | |
582 | u32 reg; | |
583 | ||
584 | reg = readl(dsi->reg_base + DSIM_CLKCTRL_REG); | |
585 | reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK | |
586 | | DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN); | |
587 | writel(reg, dsi->reg_base + DSIM_CLKCTRL_REG); | |
588 | ||
589 | reg = readl(dsi->reg_base + DSIM_PLLCTRL_REG); | |
590 | reg &= ~DSIM_PLL_EN; | |
591 | writel(reg, dsi->reg_base + DSIM_PLLCTRL_REG); | |
592 | } | |
593 | ||
594 | static int exynos_dsi_init_link(struct exynos_dsi *dsi) | |
595 | { | |
78d3a8c6 | 596 | struct exynos_dsi_driver_data *driver_data = dsi->driver_data; |
7eb8f069 AH |
597 | int timeout; |
598 | u32 reg; | |
599 | u32 lanes_mask; | |
600 | ||
601 | /* Initialize FIFO pointers */ | |
602 | reg = readl(dsi->reg_base + DSIM_FIFOCTRL_REG); | |
603 | reg &= ~0x1f; | |
604 | writel(reg, dsi->reg_base + DSIM_FIFOCTRL_REG); | |
605 | ||
606 | usleep_range(9000, 11000); | |
607 | ||
608 | reg |= 0x1f; | |
609 | writel(reg, dsi->reg_base + DSIM_FIFOCTRL_REG); | |
610 | ||
611 | usleep_range(9000, 11000); | |
612 | ||
613 | /* DSI configuration */ | |
614 | reg = 0; | |
615 | ||
2f36e33a YC |
616 | /* |
617 | * The first bit of mode_flags specifies display configuration. | |
618 | * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video | |
619 | * mode, otherwise it will support command mode. | |
620 | */ | |
7eb8f069 AH |
621 | if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { |
622 | reg |= DSIM_VIDEO_MODE; | |
623 | ||
2f36e33a YC |
624 | /* |
625 | * The user manual describes that following bits are ignored in | |
626 | * command mode. | |
627 | */ | |
7eb8f069 AH |
628 | if (!(dsi->mode_flags & MIPI_DSI_MODE_VSYNC_FLUSH)) |
629 | reg |= DSIM_MFLUSH_VS; | |
7eb8f069 AH |
630 | if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) |
631 | reg |= DSIM_SYNC_INFORM; | |
632 | if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) | |
633 | reg |= DSIM_BURST_MODE; | |
634 | if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_AUTO_VERT) | |
635 | reg |= DSIM_AUTO_MODE; | |
636 | if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE) | |
637 | reg |= DSIM_HSE_MODE; | |
638 | if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HFP)) | |
639 | reg |= DSIM_HFP_MODE; | |
640 | if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HBP)) | |
641 | reg |= DSIM_HBP_MODE; | |
642 | if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSA)) | |
643 | reg |= DSIM_HSA_MODE; | |
644 | } | |
645 | ||
2f36e33a YC |
646 | if (!(dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET)) |
647 | reg |= DSIM_EOT_DISABLE; | |
648 | ||
7eb8f069 AH |
649 | switch (dsi->format) { |
650 | case MIPI_DSI_FMT_RGB888: | |
651 | reg |= DSIM_MAIN_PIX_FORMAT_RGB888; | |
652 | break; | |
653 | case MIPI_DSI_FMT_RGB666: | |
654 | reg |= DSIM_MAIN_PIX_FORMAT_RGB666; | |
655 | break; | |
656 | case MIPI_DSI_FMT_RGB666_PACKED: | |
657 | reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P; | |
658 | break; | |
659 | case MIPI_DSI_FMT_RGB565: | |
660 | reg |= DSIM_MAIN_PIX_FORMAT_RGB565; | |
661 | break; | |
662 | default: | |
663 | dev_err(dsi->dev, "invalid pixel format\n"); | |
664 | return -EINVAL; | |
665 | } | |
666 | ||
667 | reg |= DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1); | |
668 | ||
669 | writel(reg, dsi->reg_base + DSIM_CONFIG_REG); | |
670 | ||
671 | reg |= DSIM_LANE_EN_CLK; | |
672 | writel(reg, dsi->reg_base + DSIM_CONFIG_REG); | |
673 | ||
674 | lanes_mask = BIT(dsi->lanes) - 1; | |
675 | reg |= DSIM_LANE_EN(lanes_mask); | |
676 | writel(reg, dsi->reg_base + DSIM_CONFIG_REG); | |
677 | ||
78d3a8c6 ID |
678 | /* |
679 | * Use non-continuous clock mode if the periparal wants and | |
680 | * host controller supports | |
681 | * | |
682 | * In non-continous clock mode, host controller will turn off | |
683 | * the HS clock between high-speed transmissions to reduce | |
684 | * power consumption. | |
685 | */ | |
686 | if (driver_data->has_clklane_stop && | |
687 | dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) { | |
688 | reg |= DSIM_CLKLANE_STOP; | |
689 | writel(reg, dsi->reg_base + DSIM_CONFIG_REG); | |
690 | } | |
691 | ||
7eb8f069 AH |
692 | /* Check clock and data lane state are stop state */ |
693 | timeout = 100; | |
694 | do { | |
695 | if (timeout-- == 0) { | |
696 | dev_err(dsi->dev, "waiting for bus lanes timed out\n"); | |
697 | return -EFAULT; | |
698 | } | |
699 | ||
700 | reg = readl(dsi->reg_base + DSIM_STATUS_REG); | |
701 | if ((reg & DSIM_STOP_STATE_DAT(lanes_mask)) | |
702 | != DSIM_STOP_STATE_DAT(lanes_mask)) | |
703 | continue; | |
704 | } while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK))); | |
705 | ||
706 | reg = readl(dsi->reg_base + DSIM_ESCMODE_REG); | |
707 | reg &= ~DSIM_STOP_STATE_CNT_MASK; | |
708 | reg |= DSIM_STOP_STATE_CNT(0xf); | |
709 | writel(reg, dsi->reg_base + DSIM_ESCMODE_REG); | |
710 | ||
711 | reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff); | |
712 | writel(reg, dsi->reg_base + DSIM_TIMEOUT_REG); | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi) | |
718 | { | |
719 | struct videomode *vm = &dsi->vm; | |
720 | u32 reg; | |
721 | ||
722 | if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { | |
723 | reg = DSIM_CMD_ALLOW(0xf) | |
724 | | DSIM_STABLE_VFP(vm->vfront_porch) | |
725 | | DSIM_MAIN_VBP(vm->vback_porch); | |
726 | writel(reg, dsi->reg_base + DSIM_MVPORCH_REG); | |
727 | ||
728 | reg = DSIM_MAIN_HFP(vm->hfront_porch) | |
729 | | DSIM_MAIN_HBP(vm->hback_porch); | |
730 | writel(reg, dsi->reg_base + DSIM_MHPORCH_REG); | |
731 | ||
732 | reg = DSIM_MAIN_VSA(vm->vsync_len) | |
733 | | DSIM_MAIN_HSA(vm->hsync_len); | |
734 | writel(reg, dsi->reg_base + DSIM_MSYNC_REG); | |
735 | } | |
736 | ||
737 | reg = DSIM_MAIN_HRESOL(vm->hactive) | DSIM_MAIN_VRESOL(vm->vactive); | |
738 | writel(reg, dsi->reg_base + DSIM_MDRESOL_REG); | |
739 | ||
740 | dev_dbg(dsi->dev, "LCD size = %dx%d\n", vm->hactive, vm->vactive); | |
741 | } | |
742 | ||
743 | static void exynos_dsi_set_display_enable(struct exynos_dsi *dsi, bool enable) | |
744 | { | |
745 | u32 reg; | |
746 | ||
747 | reg = readl(dsi->reg_base + DSIM_MDRESOL_REG); | |
748 | if (enable) | |
749 | reg |= DSIM_MAIN_STAND_BY; | |
750 | else | |
751 | reg &= ~DSIM_MAIN_STAND_BY; | |
752 | writel(reg, dsi->reg_base + DSIM_MDRESOL_REG); | |
753 | } | |
754 | ||
755 | static int exynos_dsi_wait_for_hdr_fifo(struct exynos_dsi *dsi) | |
756 | { | |
757 | int timeout = 2000; | |
758 | ||
759 | do { | |
760 | u32 reg = readl(dsi->reg_base + DSIM_FIFOCTRL_REG); | |
761 | ||
762 | if (!(reg & DSIM_SFR_HEADER_FULL)) | |
763 | return 0; | |
764 | ||
765 | if (!cond_resched()) | |
766 | usleep_range(950, 1050); | |
767 | } while (--timeout); | |
768 | ||
769 | return -ETIMEDOUT; | |
770 | } | |
771 | ||
772 | static void exynos_dsi_set_cmd_lpm(struct exynos_dsi *dsi, bool lpm) | |
773 | { | |
774 | u32 v = readl(dsi->reg_base + DSIM_ESCMODE_REG); | |
775 | ||
776 | if (lpm) | |
777 | v |= DSIM_CMD_LPDT_LP; | |
778 | else | |
779 | v &= ~DSIM_CMD_LPDT_LP; | |
780 | ||
781 | writel(v, dsi->reg_base + DSIM_ESCMODE_REG); | |
782 | } | |
783 | ||
784 | static void exynos_dsi_force_bta(struct exynos_dsi *dsi) | |
785 | { | |
786 | u32 v = readl(dsi->reg_base + DSIM_ESCMODE_REG); | |
787 | ||
788 | v |= DSIM_FORCE_BTA; | |
789 | writel(v, dsi->reg_base + DSIM_ESCMODE_REG); | |
790 | } | |
791 | ||
792 | static void exynos_dsi_send_to_fifo(struct exynos_dsi *dsi, | |
793 | struct exynos_dsi_transfer *xfer) | |
794 | { | |
795 | struct device *dev = dsi->dev; | |
796 | const u8 *payload = xfer->tx_payload + xfer->tx_done; | |
797 | u16 length = xfer->tx_len - xfer->tx_done; | |
798 | bool first = !xfer->tx_done; | |
799 | u32 reg; | |
800 | ||
801 | dev_dbg(dev, "< xfer %p: tx len %u, done %u, rx len %u, done %u\n", | |
802 | xfer, xfer->tx_len, xfer->tx_done, xfer->rx_len, xfer->rx_done); | |
803 | ||
804 | if (length > DSI_TX_FIFO_SIZE) | |
805 | length = DSI_TX_FIFO_SIZE; | |
806 | ||
807 | xfer->tx_done += length; | |
808 | ||
809 | /* Send payload */ | |
810 | while (length >= 4) { | |
811 | reg = (payload[3] << 24) | (payload[2] << 16) | |
812 | | (payload[1] << 8) | payload[0]; | |
813 | writel(reg, dsi->reg_base + DSIM_PAYLOAD_REG); | |
814 | payload += 4; | |
815 | length -= 4; | |
816 | } | |
817 | ||
818 | reg = 0; | |
819 | switch (length) { | |
820 | case 3: | |
821 | reg |= payload[2] << 16; | |
822 | /* Fall through */ | |
823 | case 2: | |
824 | reg |= payload[1] << 8; | |
825 | /* Fall through */ | |
826 | case 1: | |
827 | reg |= payload[0]; | |
828 | writel(reg, dsi->reg_base + DSIM_PAYLOAD_REG); | |
829 | break; | |
830 | case 0: | |
831 | /* Do nothing */ | |
832 | break; | |
833 | } | |
834 | ||
835 | /* Send packet header */ | |
836 | if (!first) | |
837 | return; | |
838 | ||
839 | reg = (xfer->data[1] << 16) | (xfer->data[0] << 8) | xfer->data_id; | |
840 | if (exynos_dsi_wait_for_hdr_fifo(dsi)) { | |
841 | dev_err(dev, "waiting for header FIFO timed out\n"); | |
842 | return; | |
843 | } | |
844 | ||
845 | if (NEQV(xfer->flags & MIPI_DSI_MSG_USE_LPM, | |
846 | dsi->state & DSIM_STATE_CMD_LPM)) { | |
847 | exynos_dsi_set_cmd_lpm(dsi, xfer->flags & MIPI_DSI_MSG_USE_LPM); | |
848 | dsi->state ^= DSIM_STATE_CMD_LPM; | |
849 | } | |
850 | ||
851 | writel(reg, dsi->reg_base + DSIM_PKTHDR_REG); | |
852 | ||
853 | if (xfer->flags & MIPI_DSI_MSG_REQ_ACK) | |
854 | exynos_dsi_force_bta(dsi); | |
855 | } | |
856 | ||
857 | static void exynos_dsi_read_from_fifo(struct exynos_dsi *dsi, | |
858 | struct exynos_dsi_transfer *xfer) | |
859 | { | |
860 | u8 *payload = xfer->rx_payload + xfer->rx_done; | |
861 | bool first = !xfer->rx_done; | |
862 | struct device *dev = dsi->dev; | |
863 | u16 length; | |
864 | u32 reg; | |
865 | ||
866 | if (first) { | |
867 | reg = readl(dsi->reg_base + DSIM_RXFIFO_REG); | |
868 | ||
869 | switch (reg & 0x3f) { | |
870 | case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE: | |
871 | case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE: | |
872 | if (xfer->rx_len >= 2) { | |
873 | payload[1] = reg >> 16; | |
874 | ++xfer->rx_done; | |
875 | } | |
876 | /* Fall through */ | |
877 | case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE: | |
878 | case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE: | |
879 | payload[0] = reg >> 8; | |
880 | ++xfer->rx_done; | |
881 | xfer->rx_len = xfer->rx_done; | |
882 | xfer->result = 0; | |
883 | goto clear_fifo; | |
884 | case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT: | |
885 | dev_err(dev, "DSI Error Report: 0x%04x\n", | |
886 | (reg >> 8) & 0xffff); | |
887 | xfer->result = 0; | |
888 | goto clear_fifo; | |
889 | } | |
890 | ||
891 | length = (reg >> 8) & 0xffff; | |
892 | if (length > xfer->rx_len) { | |
893 | dev_err(dev, | |
894 | "response too long (%u > %u bytes), stripping\n", | |
895 | xfer->rx_len, length); | |
896 | length = xfer->rx_len; | |
897 | } else if (length < xfer->rx_len) | |
898 | xfer->rx_len = length; | |
899 | } | |
900 | ||
901 | length = xfer->rx_len - xfer->rx_done; | |
902 | xfer->rx_done += length; | |
903 | ||
904 | /* Receive payload */ | |
905 | while (length >= 4) { | |
906 | reg = readl(dsi->reg_base + DSIM_RXFIFO_REG); | |
907 | payload[0] = (reg >> 0) & 0xff; | |
908 | payload[1] = (reg >> 8) & 0xff; | |
909 | payload[2] = (reg >> 16) & 0xff; | |
910 | payload[3] = (reg >> 24) & 0xff; | |
911 | payload += 4; | |
912 | length -= 4; | |
913 | } | |
914 | ||
915 | if (length) { | |
916 | reg = readl(dsi->reg_base + DSIM_RXFIFO_REG); | |
917 | switch (length) { | |
918 | case 3: | |
919 | payload[2] = (reg >> 16) & 0xff; | |
920 | /* Fall through */ | |
921 | case 2: | |
922 | payload[1] = (reg >> 8) & 0xff; | |
923 | /* Fall through */ | |
924 | case 1: | |
925 | payload[0] = reg & 0xff; | |
926 | } | |
927 | } | |
928 | ||
929 | if (xfer->rx_done == xfer->rx_len) | |
930 | xfer->result = 0; | |
931 | ||
932 | clear_fifo: | |
933 | length = DSI_RX_FIFO_SIZE / 4; | |
934 | do { | |
935 | reg = readl(dsi->reg_base + DSIM_RXFIFO_REG); | |
936 | if (reg == DSI_RX_FIFO_EMPTY) | |
937 | break; | |
938 | } while (--length); | |
939 | } | |
940 | ||
941 | static void exynos_dsi_transfer_start(struct exynos_dsi *dsi) | |
942 | { | |
943 | unsigned long flags; | |
944 | struct exynos_dsi_transfer *xfer; | |
945 | bool start = false; | |
946 | ||
947 | again: | |
948 | spin_lock_irqsave(&dsi->transfer_lock, flags); | |
949 | ||
950 | if (list_empty(&dsi->transfer_list)) { | |
951 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
952 | return; | |
953 | } | |
954 | ||
955 | xfer = list_first_entry(&dsi->transfer_list, | |
956 | struct exynos_dsi_transfer, list); | |
957 | ||
958 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
959 | ||
960 | if (xfer->tx_len && xfer->tx_done == xfer->tx_len) | |
961 | /* waiting for RX */ | |
962 | return; | |
963 | ||
964 | exynos_dsi_send_to_fifo(dsi, xfer); | |
965 | ||
966 | if (xfer->tx_len || xfer->rx_len) | |
967 | return; | |
968 | ||
969 | xfer->result = 0; | |
970 | complete(&xfer->completed); | |
971 | ||
972 | spin_lock_irqsave(&dsi->transfer_lock, flags); | |
973 | ||
974 | list_del_init(&xfer->list); | |
975 | start = !list_empty(&dsi->transfer_list); | |
976 | ||
977 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
978 | ||
979 | if (start) | |
980 | goto again; | |
981 | } | |
982 | ||
983 | static bool exynos_dsi_transfer_finish(struct exynos_dsi *dsi) | |
984 | { | |
985 | struct exynos_dsi_transfer *xfer; | |
986 | unsigned long flags; | |
987 | bool start = true; | |
988 | ||
989 | spin_lock_irqsave(&dsi->transfer_lock, flags); | |
990 | ||
991 | if (list_empty(&dsi->transfer_list)) { | |
992 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
993 | return false; | |
994 | } | |
995 | ||
996 | xfer = list_first_entry(&dsi->transfer_list, | |
997 | struct exynos_dsi_transfer, list); | |
998 | ||
999 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
1000 | ||
1001 | dev_dbg(dsi->dev, | |
1002 | "> xfer %p, tx_len %u, tx_done %u, rx_len %u, rx_done %u\n", | |
1003 | xfer, xfer->tx_len, xfer->tx_done, xfer->rx_len, xfer->rx_done); | |
1004 | ||
1005 | if (xfer->tx_done != xfer->tx_len) | |
1006 | return true; | |
1007 | ||
1008 | if (xfer->rx_done != xfer->rx_len) | |
1009 | exynos_dsi_read_from_fifo(dsi, xfer); | |
1010 | ||
1011 | if (xfer->rx_done != xfer->rx_len) | |
1012 | return true; | |
1013 | ||
1014 | spin_lock_irqsave(&dsi->transfer_lock, flags); | |
1015 | ||
1016 | list_del_init(&xfer->list); | |
1017 | start = !list_empty(&dsi->transfer_list); | |
1018 | ||
1019 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
1020 | ||
1021 | if (!xfer->rx_len) | |
1022 | xfer->result = 0; | |
1023 | complete(&xfer->completed); | |
1024 | ||
1025 | return start; | |
1026 | } | |
1027 | ||
1028 | static void exynos_dsi_remove_transfer(struct exynos_dsi *dsi, | |
1029 | struct exynos_dsi_transfer *xfer) | |
1030 | { | |
1031 | unsigned long flags; | |
1032 | bool start; | |
1033 | ||
1034 | spin_lock_irqsave(&dsi->transfer_lock, flags); | |
1035 | ||
1036 | if (!list_empty(&dsi->transfer_list) && | |
1037 | xfer == list_first_entry(&dsi->transfer_list, | |
1038 | struct exynos_dsi_transfer, list)) { | |
1039 | list_del_init(&xfer->list); | |
1040 | start = !list_empty(&dsi->transfer_list); | |
1041 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
1042 | if (start) | |
1043 | exynos_dsi_transfer_start(dsi); | |
1044 | return; | |
1045 | } | |
1046 | ||
1047 | list_del_init(&xfer->list); | |
1048 | ||
1049 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
1050 | } | |
1051 | ||
1052 | static int exynos_dsi_transfer(struct exynos_dsi *dsi, | |
1053 | struct exynos_dsi_transfer *xfer) | |
1054 | { | |
1055 | unsigned long flags; | |
1056 | bool stopped; | |
1057 | ||
1058 | xfer->tx_done = 0; | |
1059 | xfer->rx_done = 0; | |
1060 | xfer->result = -ETIMEDOUT; | |
1061 | init_completion(&xfer->completed); | |
1062 | ||
1063 | spin_lock_irqsave(&dsi->transfer_lock, flags); | |
1064 | ||
1065 | stopped = list_empty(&dsi->transfer_list); | |
1066 | list_add_tail(&xfer->list, &dsi->transfer_list); | |
1067 | ||
1068 | spin_unlock_irqrestore(&dsi->transfer_lock, flags); | |
1069 | ||
1070 | if (stopped) | |
1071 | exynos_dsi_transfer_start(dsi); | |
1072 | ||
1073 | wait_for_completion_timeout(&xfer->completed, | |
1074 | msecs_to_jiffies(DSI_XFER_TIMEOUT_MS)); | |
1075 | if (xfer->result == -ETIMEDOUT) { | |
1076 | exynos_dsi_remove_transfer(dsi, xfer); | |
1077 | dev_err(dsi->dev, "xfer timed out: %*ph %*ph\n", 2, xfer->data, | |
1078 | xfer->tx_len, xfer->tx_payload); | |
1079 | return -ETIMEDOUT; | |
1080 | } | |
1081 | ||
1082 | /* Also covers hardware timeout condition */ | |
1083 | return xfer->result; | |
1084 | } | |
1085 | ||
1086 | static irqreturn_t exynos_dsi_irq(int irq, void *dev_id) | |
1087 | { | |
1088 | struct exynos_dsi *dsi = dev_id; | |
1089 | u32 status; | |
1090 | ||
1091 | status = readl(dsi->reg_base + DSIM_INTSRC_REG); | |
1092 | if (!status) { | |
1093 | static unsigned long int j; | |
1094 | if (printk_timed_ratelimit(&j, 500)) | |
1095 | dev_warn(dsi->dev, "spurious interrupt\n"); | |
1096 | return IRQ_HANDLED; | |
1097 | } | |
1098 | writel(status, dsi->reg_base + DSIM_INTSRC_REG); | |
1099 | ||
1100 | if (status & DSIM_INT_SW_RST_RELEASE) { | |
1101 | u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY); | |
1102 | writel(mask, dsi->reg_base + DSIM_INTMSK_REG); | |
1103 | complete(&dsi->completed); | |
1104 | return IRQ_HANDLED; | |
1105 | } | |
1106 | ||
1107 | if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY))) | |
1108 | return IRQ_HANDLED; | |
1109 | ||
1110 | if (exynos_dsi_transfer_finish(dsi)) | |
1111 | exynos_dsi_transfer_start(dsi); | |
1112 | ||
1113 | return IRQ_HANDLED; | |
1114 | } | |
1115 | ||
e17ddecc YC |
1116 | static irqreturn_t exynos_dsi_te_irq_handler(int irq, void *dev_id) |
1117 | { | |
1118 | struct exynos_dsi *dsi = (struct exynos_dsi *)dev_id; | |
e5169723 | 1119 | struct drm_encoder *encoder = dsi->display.encoder; |
e17ddecc YC |
1120 | |
1121 | if (dsi->state & DSIM_STATE_ENABLED) | |
1122 | exynos_drm_crtc_te_handler(encoder->crtc); | |
1123 | ||
1124 | return IRQ_HANDLED; | |
1125 | } | |
1126 | ||
1127 | static void exynos_dsi_enable_irq(struct exynos_dsi *dsi) | |
1128 | { | |
1129 | enable_irq(dsi->irq); | |
1130 | ||
1131 | if (gpio_is_valid(dsi->te_gpio)) | |
1132 | enable_irq(gpio_to_irq(dsi->te_gpio)); | |
1133 | } | |
1134 | ||
1135 | static void exynos_dsi_disable_irq(struct exynos_dsi *dsi) | |
1136 | { | |
1137 | if (gpio_is_valid(dsi->te_gpio)) | |
1138 | disable_irq(gpio_to_irq(dsi->te_gpio)); | |
1139 | ||
1140 | disable_irq(dsi->irq); | |
1141 | } | |
1142 | ||
7eb8f069 AH |
1143 | static int exynos_dsi_init(struct exynos_dsi *dsi) |
1144 | { | |
7eb8f069 | 1145 | exynos_dsi_reset(dsi); |
e17ddecc | 1146 | exynos_dsi_enable_irq(dsi); |
9a320415 | 1147 | exynos_dsi_enable_clock(dsi); |
7eb8f069 | 1148 | exynos_dsi_wait_for_reset(dsi); |
9a320415 | 1149 | exynos_dsi_set_phy_ctrl(dsi); |
7eb8f069 AH |
1150 | exynos_dsi_init_link(dsi); |
1151 | ||
1152 | return 0; | |
1153 | } | |
1154 | ||
e17ddecc YC |
1155 | static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi) |
1156 | { | |
1157 | int ret; | |
0cef83a5 | 1158 | int te_gpio_irq; |
e17ddecc YC |
1159 | |
1160 | dsi->te_gpio = of_get_named_gpio(dsi->panel_node, "te-gpios", 0); | |
1161 | if (!gpio_is_valid(dsi->te_gpio)) { | |
1162 | dev_err(dsi->dev, "no te-gpios specified\n"); | |
1163 | ret = dsi->te_gpio; | |
1164 | goto out; | |
1165 | } | |
1166 | ||
1167 | ret = gpio_request_one(dsi->te_gpio, GPIOF_IN, "te_gpio"); | |
1168 | if (ret) { | |
1169 | dev_err(dsi->dev, "gpio request failed with %d\n", ret); | |
1170 | goto out; | |
1171 | } | |
1172 | ||
0cef83a5 YC |
1173 | te_gpio_irq = gpio_to_irq(dsi->te_gpio); |
1174 | ||
1175 | irq_set_status_flags(te_gpio_irq, IRQ_NOAUTOEN); | |
1176 | ret = request_threaded_irq(te_gpio_irq, exynos_dsi_te_irq_handler, NULL, | |
e17ddecc YC |
1177 | IRQF_TRIGGER_RISING, "TE", dsi); |
1178 | if (ret) { | |
1179 | dev_err(dsi->dev, "request interrupt failed with %d\n", ret); | |
1180 | gpio_free(dsi->te_gpio); | |
1181 | goto out; | |
1182 | } | |
1183 | ||
1184 | out: | |
1185 | return ret; | |
1186 | } | |
1187 | ||
1188 | static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi) | |
1189 | { | |
1190 | if (gpio_is_valid(dsi->te_gpio)) { | |
1191 | free_irq(gpio_to_irq(dsi->te_gpio), dsi); | |
1192 | gpio_free(dsi->te_gpio); | |
1193 | dsi->te_gpio = -ENOENT; | |
1194 | } | |
1195 | } | |
1196 | ||
7eb8f069 AH |
1197 | static int exynos_dsi_host_attach(struct mipi_dsi_host *host, |
1198 | struct mipi_dsi_device *device) | |
1199 | { | |
1200 | struct exynos_dsi *dsi = host_to_dsi(host); | |
1201 | ||
1202 | dsi->lanes = device->lanes; | |
1203 | dsi->format = device->format; | |
1204 | dsi->mode_flags = device->mode_flags; | |
1205 | dsi->panel_node = device->dev.of_node; | |
1206 | ||
e17ddecc YC |
1207 | /* |
1208 | * This is a temporary solution and should be made by more generic way. | |
1209 | * | |
1210 | * If attached panel device is for command mode one, dsi should register | |
1211 | * TE interrupt handler. | |
1212 | */ | |
1213 | if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO)) { | |
1214 | int ret = exynos_dsi_register_te_irq(dsi); | |
1215 | ||
1216 | if (ret) | |
1217 | return ret; | |
1218 | } | |
1219 | ||
ecb84157 YC |
1220 | if (dsi->connector.dev) |
1221 | drm_helper_hpd_irq_event(dsi->connector.dev); | |
1222 | ||
7eb8f069 AH |
1223 | return 0; |
1224 | } | |
1225 | ||
1226 | static int exynos_dsi_host_detach(struct mipi_dsi_host *host, | |
1227 | struct mipi_dsi_device *device) | |
1228 | { | |
1229 | struct exynos_dsi *dsi = host_to_dsi(host); | |
1230 | ||
e17ddecc YC |
1231 | exynos_dsi_unregister_te_irq(dsi); |
1232 | ||
7eb8f069 AH |
1233 | dsi->panel_node = NULL; |
1234 | ||
1235 | if (dsi->connector.dev) | |
1236 | drm_helper_hpd_irq_event(dsi->connector.dev); | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | /* distinguish between short and long DSI packet types */ | |
1242 | static bool exynos_dsi_is_short_dsi_type(u8 type) | |
1243 | { | |
1244 | return (type & 0x0f) <= 8; | |
1245 | } | |
1246 | ||
1247 | static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host, | |
ed6ff40e | 1248 | const struct mipi_dsi_msg *msg) |
7eb8f069 AH |
1249 | { |
1250 | struct exynos_dsi *dsi = host_to_dsi(host); | |
1251 | struct exynos_dsi_transfer xfer; | |
1252 | int ret; | |
1253 | ||
1254 | if (!(dsi->state & DSIM_STATE_INITIALIZED)) { | |
1255 | ret = exynos_dsi_init(dsi); | |
1256 | if (ret) | |
1257 | return ret; | |
1258 | dsi->state |= DSIM_STATE_INITIALIZED; | |
1259 | } | |
1260 | ||
1261 | if (msg->tx_len == 0) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | xfer.data_id = msg->type | (msg->channel << 6); | |
1265 | ||
1266 | if (exynos_dsi_is_short_dsi_type(msg->type)) { | |
1267 | const char *tx_buf = msg->tx_buf; | |
1268 | ||
1269 | if (msg->tx_len > 2) | |
1270 | return -EINVAL; | |
1271 | xfer.tx_len = 0; | |
1272 | xfer.data[0] = tx_buf[0]; | |
1273 | xfer.data[1] = (msg->tx_len == 2) ? tx_buf[1] : 0; | |
1274 | } else { | |
1275 | xfer.tx_len = msg->tx_len; | |
1276 | xfer.data[0] = msg->tx_len & 0xff; | |
1277 | xfer.data[1] = msg->tx_len >> 8; | |
1278 | xfer.tx_payload = msg->tx_buf; | |
1279 | } | |
1280 | ||
1281 | xfer.rx_len = msg->rx_len; | |
1282 | xfer.rx_payload = msg->rx_buf; | |
1283 | xfer.flags = msg->flags; | |
1284 | ||
1285 | ret = exynos_dsi_transfer(dsi, &xfer); | |
1286 | return (ret < 0) ? ret : xfer.rx_done; | |
1287 | } | |
1288 | ||
1289 | static const struct mipi_dsi_host_ops exynos_dsi_ops = { | |
1290 | .attach = exynos_dsi_host_attach, | |
1291 | .detach = exynos_dsi_host_detach, | |
1292 | .transfer = exynos_dsi_host_transfer, | |
1293 | }; | |
1294 | ||
1295 | static int exynos_dsi_poweron(struct exynos_dsi *dsi) | |
1296 | { | |
1297 | int ret; | |
1298 | ||
1299 | ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies); | |
1300 | if (ret < 0) { | |
1301 | dev_err(dsi->dev, "cannot enable regulators %d\n", ret); | |
1302 | return ret; | |
1303 | } | |
1304 | ||
1305 | ret = clk_prepare_enable(dsi->bus_clk); | |
1306 | if (ret < 0) { | |
1307 | dev_err(dsi->dev, "cannot enable bus clock %d\n", ret); | |
1308 | goto err_bus_clk; | |
1309 | } | |
1310 | ||
1311 | ret = clk_prepare_enable(dsi->pll_clk); | |
1312 | if (ret < 0) { | |
1313 | dev_err(dsi->dev, "cannot enable pll clock %d\n", ret); | |
1314 | goto err_pll_clk; | |
1315 | } | |
1316 | ||
1317 | ret = phy_power_on(dsi->phy); | |
1318 | if (ret < 0) { | |
1319 | dev_err(dsi->dev, "cannot enable phy %d\n", ret); | |
1320 | goto err_phy; | |
1321 | } | |
1322 | ||
1323 | return 0; | |
1324 | ||
1325 | err_phy: | |
1326 | clk_disable_unprepare(dsi->pll_clk); | |
1327 | err_pll_clk: | |
1328 | clk_disable_unprepare(dsi->bus_clk); | |
1329 | err_bus_clk: | |
1330 | regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies); | |
1331 | ||
1332 | return ret; | |
1333 | } | |
1334 | ||
1335 | static void exynos_dsi_poweroff(struct exynos_dsi *dsi) | |
1336 | { | |
1337 | int ret; | |
1338 | ||
1339 | usleep_range(10000, 20000); | |
1340 | ||
1341 | if (dsi->state & DSIM_STATE_INITIALIZED) { | |
1342 | dsi->state &= ~DSIM_STATE_INITIALIZED; | |
1343 | ||
1344 | exynos_dsi_disable_clock(dsi); | |
1345 | ||
e17ddecc | 1346 | exynos_dsi_disable_irq(dsi); |
7eb8f069 AH |
1347 | } |
1348 | ||
1349 | dsi->state &= ~DSIM_STATE_CMD_LPM; | |
1350 | ||
1351 | phy_power_off(dsi->phy); | |
1352 | ||
1353 | clk_disable_unprepare(dsi->pll_clk); | |
1354 | clk_disable_unprepare(dsi->bus_clk); | |
1355 | ||
1356 | ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies); | |
1357 | if (ret < 0) | |
1358 | dev_err(dsi->dev, "cannot disable regulators %d\n", ret); | |
1359 | } | |
1360 | ||
1361 | static int exynos_dsi_enable(struct exynos_dsi *dsi) | |
1362 | { | |
1363 | int ret; | |
1364 | ||
1365 | if (dsi->state & DSIM_STATE_ENABLED) | |
1366 | return 0; | |
1367 | ||
1368 | ret = exynos_dsi_poweron(dsi); | |
1369 | if (ret < 0) | |
1370 | return ret; | |
1371 | ||
cdfb8694 | 1372 | ret = drm_panel_prepare(dsi->panel); |
7eb8f069 AH |
1373 | if (ret < 0) { |
1374 | exynos_dsi_poweroff(dsi); | |
1375 | return ret; | |
1376 | } | |
1377 | ||
1378 | exynos_dsi_set_display_mode(dsi); | |
1379 | exynos_dsi_set_display_enable(dsi, true); | |
1380 | ||
d41bb38f YC |
1381 | dsi->state |= DSIM_STATE_ENABLED; |
1382 | ||
cdfb8694 AK |
1383 | ret = drm_panel_enable(dsi->panel); |
1384 | if (ret < 0) { | |
d41bb38f | 1385 | dsi->state &= ~DSIM_STATE_ENABLED; |
cdfb8694 AK |
1386 | exynos_dsi_set_display_enable(dsi, false); |
1387 | drm_panel_unprepare(dsi->panel); | |
1388 | exynos_dsi_poweroff(dsi); | |
1389 | return ret; | |
1390 | } | |
1391 | ||
7eb8f069 AH |
1392 | return 0; |
1393 | } | |
1394 | ||
1395 | static void exynos_dsi_disable(struct exynos_dsi *dsi) | |
1396 | { | |
1397 | if (!(dsi->state & DSIM_STATE_ENABLED)) | |
1398 | return; | |
1399 | ||
7eb8f069 | 1400 | drm_panel_disable(dsi->panel); |
cdfb8694 AK |
1401 | exynos_dsi_set_display_enable(dsi, false); |
1402 | drm_panel_unprepare(dsi->panel); | |
7eb8f069 AH |
1403 | exynos_dsi_poweroff(dsi); |
1404 | ||
1405 | dsi->state &= ~DSIM_STATE_ENABLED; | |
1406 | } | |
1407 | ||
1408 | static void exynos_dsi_dpms(struct exynos_drm_display *display, int mode) | |
1409 | { | |
5cd5db80 | 1410 | struct exynos_dsi *dsi = display_to_dsi(display); |
7eb8f069 AH |
1411 | |
1412 | if (dsi->panel) { | |
1413 | switch (mode) { | |
1414 | case DRM_MODE_DPMS_ON: | |
1415 | exynos_dsi_enable(dsi); | |
1416 | break; | |
1417 | case DRM_MODE_DPMS_STANDBY: | |
1418 | case DRM_MODE_DPMS_SUSPEND: | |
1419 | case DRM_MODE_DPMS_OFF: | |
1420 | exynos_dsi_disable(dsi); | |
1421 | break; | |
1422 | default: | |
1423 | break; | |
1424 | } | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | static enum drm_connector_status | |
1429 | exynos_dsi_detect(struct drm_connector *connector, bool force) | |
1430 | { | |
1431 | struct exynos_dsi *dsi = connector_to_dsi(connector); | |
1432 | ||
1433 | if (!dsi->panel) { | |
1434 | dsi->panel = of_drm_find_panel(dsi->panel_node); | |
1435 | if (dsi->panel) | |
1436 | drm_panel_attach(dsi->panel, &dsi->connector); | |
1437 | } else if (!dsi->panel_node) { | |
1438 | struct exynos_drm_display *display; | |
1439 | ||
1440 | display = platform_get_drvdata(to_platform_device(dsi->dev)); | |
1441 | exynos_dsi_dpms(display, DRM_MODE_DPMS_OFF); | |
1442 | drm_panel_detach(dsi->panel); | |
1443 | dsi->panel = NULL; | |
1444 | } | |
1445 | ||
1446 | if (dsi->panel) | |
1447 | return connector_status_connected; | |
1448 | ||
1449 | return connector_status_disconnected; | |
1450 | } | |
1451 | ||
1452 | static void exynos_dsi_connector_destroy(struct drm_connector *connector) | |
1453 | { | |
0ae46015 AH |
1454 | drm_connector_unregister(connector); |
1455 | drm_connector_cleanup(connector); | |
1456 | connector->dev = NULL; | |
7eb8f069 AH |
1457 | } |
1458 | ||
1459 | static struct drm_connector_funcs exynos_dsi_connector_funcs = { | |
1460 | .dpms = drm_helper_connector_dpms, | |
1461 | .detect = exynos_dsi_detect, | |
1462 | .fill_modes = drm_helper_probe_single_connector_modes, | |
1463 | .destroy = exynos_dsi_connector_destroy, | |
1464 | }; | |
1465 | ||
1466 | static int exynos_dsi_get_modes(struct drm_connector *connector) | |
1467 | { | |
1468 | struct exynos_dsi *dsi = connector_to_dsi(connector); | |
1469 | ||
1470 | if (dsi->panel) | |
1471 | return dsi->panel->funcs->get_modes(dsi->panel); | |
1472 | ||
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static int exynos_dsi_mode_valid(struct drm_connector *connector, | |
1477 | struct drm_display_mode *mode) | |
1478 | { | |
1479 | return MODE_OK; | |
1480 | } | |
1481 | ||
1482 | static struct drm_encoder * | |
1483 | exynos_dsi_best_encoder(struct drm_connector *connector) | |
1484 | { | |
1485 | struct exynos_dsi *dsi = connector_to_dsi(connector); | |
1486 | ||
e5169723 | 1487 | return dsi->display.encoder; |
7eb8f069 AH |
1488 | } |
1489 | ||
1490 | static struct drm_connector_helper_funcs exynos_dsi_connector_helper_funcs = { | |
1491 | .get_modes = exynos_dsi_get_modes, | |
1492 | .mode_valid = exynos_dsi_mode_valid, | |
1493 | .best_encoder = exynos_dsi_best_encoder, | |
1494 | }; | |
1495 | ||
1496 | static int exynos_dsi_create_connector(struct exynos_drm_display *display, | |
1497 | struct drm_encoder *encoder) | |
1498 | { | |
5cd5db80 | 1499 | struct exynos_dsi *dsi = display_to_dsi(display); |
7eb8f069 AH |
1500 | struct drm_connector *connector = &dsi->connector; |
1501 | int ret; | |
1502 | ||
7eb8f069 AH |
1503 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
1504 | ||
1505 | ret = drm_connector_init(encoder->dev, connector, | |
1506 | &exynos_dsi_connector_funcs, | |
1507 | DRM_MODE_CONNECTOR_DSI); | |
1508 | if (ret) { | |
1509 | DRM_ERROR("Failed to initialize connector with drm\n"); | |
1510 | return ret; | |
1511 | } | |
1512 | ||
1513 | drm_connector_helper_add(connector, &exynos_dsi_connector_helper_funcs); | |
34ea3d38 | 1514 | drm_connector_register(connector); |
7eb8f069 AH |
1515 | drm_mode_connector_attach_encoder(connector, encoder); |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | static void exynos_dsi_mode_set(struct exynos_drm_display *display, | |
1521 | struct drm_display_mode *mode) | |
1522 | { | |
5cd5db80 | 1523 | struct exynos_dsi *dsi = display_to_dsi(display); |
7eb8f069 AH |
1524 | struct videomode *vm = &dsi->vm; |
1525 | ||
1526 | vm->hactive = mode->hdisplay; | |
1527 | vm->vactive = mode->vdisplay; | |
1528 | vm->vfront_porch = mode->vsync_start - mode->vdisplay; | |
1529 | vm->vback_porch = mode->vtotal - mode->vsync_end; | |
1530 | vm->vsync_len = mode->vsync_end - mode->vsync_start; | |
1531 | vm->hfront_porch = mode->hsync_start - mode->hdisplay; | |
1532 | vm->hback_porch = mode->htotal - mode->hsync_end; | |
1533 | vm->hsync_len = mode->hsync_end - mode->hsync_start; | |
1534 | } | |
1535 | ||
1536 | static struct exynos_drm_display_ops exynos_dsi_display_ops = { | |
1537 | .create_connector = exynos_dsi_create_connector, | |
1538 | .mode_set = exynos_dsi_mode_set, | |
1539 | .dpms = exynos_dsi_dpms | |
1540 | }; | |
1541 | ||
bd024b86 | 1542 | MODULE_DEVICE_TABLE(of, exynos_dsi_of_match); |
7eb8f069 AH |
1543 | |
1544 | /* of_* functions will be removed after merge of of_graph patches */ | |
1545 | static struct device_node * | |
1546 | of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg) | |
1547 | { | |
1548 | struct device_node *np; | |
1549 | ||
1550 | for_each_child_of_node(parent, np) { | |
1551 | u32 r; | |
1552 | ||
1553 | if (!np->name || of_node_cmp(np->name, name)) | |
1554 | continue; | |
1555 | ||
1556 | if (of_property_read_u32(np, "reg", &r) < 0) | |
1557 | r = 0; | |
1558 | ||
1559 | if (reg == r) | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | return np; | |
1564 | } | |
1565 | ||
1566 | static struct device_node *of_graph_get_port_by_reg(struct device_node *parent, | |
1567 | u32 reg) | |
1568 | { | |
1569 | struct device_node *ports, *port; | |
1570 | ||
1571 | ports = of_get_child_by_name(parent, "ports"); | |
1572 | if (ports) | |
1573 | parent = ports; | |
1574 | ||
1575 | port = of_get_child_by_name_reg(parent, "port", reg); | |
1576 | ||
1577 | of_node_put(ports); | |
1578 | ||
1579 | return port; | |
1580 | } | |
1581 | ||
1582 | static struct device_node * | |
1583 | of_graph_get_endpoint_by_reg(struct device_node *port, u32 reg) | |
1584 | { | |
1585 | return of_get_child_by_name_reg(port, "endpoint", reg); | |
1586 | } | |
1587 | ||
1588 | static int exynos_dsi_of_read_u32(const struct device_node *np, | |
1589 | const char *propname, u32 *out_value) | |
1590 | { | |
1591 | int ret = of_property_read_u32(np, propname, out_value); | |
1592 | ||
1593 | if (ret < 0) | |
1594 | pr_err("%s: failed to get '%s' property\n", np->full_name, | |
1595 | propname); | |
1596 | ||
1597 | return ret; | |
1598 | } | |
1599 | ||
1600 | enum { | |
1601 | DSI_PORT_IN, | |
1602 | DSI_PORT_OUT | |
1603 | }; | |
1604 | ||
1605 | static int exynos_dsi_parse_dt(struct exynos_dsi *dsi) | |
1606 | { | |
1607 | struct device *dev = dsi->dev; | |
1608 | struct device_node *node = dev->of_node; | |
1609 | struct device_node *port, *ep; | |
1610 | int ret; | |
1611 | ||
1612 | ret = exynos_dsi_of_read_u32(node, "samsung,pll-clock-frequency", | |
1613 | &dsi->pll_clk_rate); | |
1614 | if (ret < 0) | |
1615 | return ret; | |
1616 | ||
1617 | port = of_graph_get_port_by_reg(node, DSI_PORT_OUT); | |
1618 | if (!port) { | |
1619 | dev_err(dev, "no output port specified\n"); | |
1620 | return -EINVAL; | |
1621 | } | |
1622 | ||
1623 | ep = of_graph_get_endpoint_by_reg(port, 0); | |
1624 | of_node_put(port); | |
1625 | if (!ep) { | |
1626 | dev_err(dev, "no endpoint specified in output port\n"); | |
1627 | return -EINVAL; | |
1628 | } | |
1629 | ||
1630 | ret = exynos_dsi_of_read_u32(ep, "samsung,burst-clock-frequency", | |
1631 | &dsi->burst_clk_rate); | |
1632 | if (ret < 0) | |
1633 | goto end; | |
1634 | ||
1635 | ret = exynos_dsi_of_read_u32(ep, "samsung,esc-clock-frequency", | |
1636 | &dsi->esc_clk_rate); | |
1637 | ||
1638 | end: | |
1639 | of_node_put(ep); | |
1640 | ||
1641 | return ret; | |
1642 | } | |
1643 | ||
f37cd5e8 ID |
1644 | static int exynos_dsi_bind(struct device *dev, struct device *master, |
1645 | void *data) | |
1646 | { | |
2900c69c | 1647 | struct exynos_drm_display *display = dev_get_drvdata(dev); |
5cd5db80 | 1648 | struct exynos_dsi *dsi = display_to_dsi(display); |
f37cd5e8 | 1649 | struct drm_device *drm_dev = data; |
f37cd5e8 ID |
1650 | int ret; |
1651 | ||
2900c69c | 1652 | ret = exynos_drm_create_enc_conn(drm_dev, display); |
f37cd5e8 ID |
1653 | if (ret) { |
1654 | DRM_ERROR("Encoder create [%d] failed with %d\n", | |
2900c69c | 1655 | display->type, ret); |
f37cd5e8 ID |
1656 | return ret; |
1657 | } | |
1658 | ||
f37cd5e8 ID |
1659 | return mipi_dsi_host_register(&dsi->dsi_host); |
1660 | } | |
1661 | ||
1662 | static void exynos_dsi_unbind(struct device *dev, struct device *master, | |
1663 | void *data) | |
1664 | { | |
2900c69c | 1665 | struct exynos_drm_display *display = dev_get_drvdata(dev); |
5cd5db80 | 1666 | struct exynos_dsi *dsi = display_to_dsi(display); |
f37cd5e8 | 1667 | |
2900c69c | 1668 | exynos_dsi_dpms(display, DRM_MODE_DPMS_OFF); |
f37cd5e8 | 1669 | |
0ae46015 | 1670 | mipi_dsi_host_unregister(&dsi->dsi_host); |
f37cd5e8 ID |
1671 | } |
1672 | ||
f37cd5e8 ID |
1673 | static const struct component_ops exynos_dsi_component_ops = { |
1674 | .bind = exynos_dsi_bind, | |
1675 | .unbind = exynos_dsi_unbind, | |
1676 | }; | |
1677 | ||
7eb8f069 AH |
1678 | static int exynos_dsi_probe(struct platform_device *pdev) |
1679 | { | |
2900c69c | 1680 | struct device *dev = &pdev->dev; |
7eb8f069 AH |
1681 | struct resource *res; |
1682 | struct exynos_dsi *dsi; | |
1683 | int ret; | |
1684 | ||
2900c69c AH |
1685 | dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); |
1686 | if (!dsi) | |
1687 | return -ENOMEM; | |
1688 | ||
1689 | dsi->display.type = EXYNOS_DISPLAY_TYPE_LCD; | |
1690 | dsi->display.ops = &exynos_dsi_display_ops; | |
1691 | ||
1692 | ret = exynos_drm_component_add(dev, EXYNOS_DEVICE_TYPE_CONNECTOR, | |
1693 | dsi->display.type); | |
df5225bc ID |
1694 | if (ret) |
1695 | return ret; | |
1696 | ||
e17ddecc YC |
1697 | /* To be checked as invalid one */ |
1698 | dsi->te_gpio = -ENOENT; | |
1699 | ||
7eb8f069 AH |
1700 | init_completion(&dsi->completed); |
1701 | spin_lock_init(&dsi->transfer_lock); | |
1702 | INIT_LIST_HEAD(&dsi->transfer_list); | |
1703 | ||
1704 | dsi->dsi_host.ops = &exynos_dsi_ops; | |
e2d2a1e0 | 1705 | dsi->dsi_host.dev = dev; |
7eb8f069 | 1706 | |
e2d2a1e0 | 1707 | dsi->dev = dev; |
9a320415 | 1708 | dsi->driver_data = exynos_dsi_get_driver_data(pdev); |
7eb8f069 AH |
1709 | |
1710 | ret = exynos_dsi_parse_dt(dsi); | |
1711 | if (ret) | |
df5225bc | 1712 | goto err_del_component; |
7eb8f069 AH |
1713 | |
1714 | dsi->supplies[0].supply = "vddcore"; | |
1715 | dsi->supplies[1].supply = "vddio"; | |
e2d2a1e0 | 1716 | ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies), |
7eb8f069 AH |
1717 | dsi->supplies); |
1718 | if (ret) { | |
e2d2a1e0 | 1719 | dev_info(dev, "failed to get regulators: %d\n", ret); |
7eb8f069 AH |
1720 | return -EPROBE_DEFER; |
1721 | } | |
1722 | ||
e2d2a1e0 | 1723 | dsi->pll_clk = devm_clk_get(dev, "pll_clk"); |
7eb8f069 | 1724 | if (IS_ERR(dsi->pll_clk)) { |
e2d2a1e0 | 1725 | dev_info(dev, "failed to get dsi pll input clock\n"); |
df5225bc ID |
1726 | ret = PTR_ERR(dsi->pll_clk); |
1727 | goto err_del_component; | |
7eb8f069 AH |
1728 | } |
1729 | ||
e2d2a1e0 | 1730 | dsi->bus_clk = devm_clk_get(dev, "bus_clk"); |
7eb8f069 | 1731 | if (IS_ERR(dsi->bus_clk)) { |
e2d2a1e0 | 1732 | dev_info(dev, "failed to get dsi bus clock\n"); |
df5225bc ID |
1733 | ret = PTR_ERR(dsi->bus_clk); |
1734 | goto err_del_component; | |
7eb8f069 AH |
1735 | } |
1736 | ||
1737 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
e2d2a1e0 | 1738 | dsi->reg_base = devm_ioremap_resource(dev, res); |
293d3f6a | 1739 | if (IS_ERR(dsi->reg_base)) { |
e2d2a1e0 | 1740 | dev_err(dev, "failed to remap io region\n"); |
df5225bc ID |
1741 | ret = PTR_ERR(dsi->reg_base); |
1742 | goto err_del_component; | |
7eb8f069 AH |
1743 | } |
1744 | ||
e2d2a1e0 | 1745 | dsi->phy = devm_phy_get(dev, "dsim"); |
7eb8f069 | 1746 | if (IS_ERR(dsi->phy)) { |
e2d2a1e0 | 1747 | dev_info(dev, "failed to get dsim phy\n"); |
df5225bc ID |
1748 | ret = PTR_ERR(dsi->phy); |
1749 | goto err_del_component; | |
7eb8f069 AH |
1750 | } |
1751 | ||
1752 | dsi->irq = platform_get_irq(pdev, 0); | |
1753 | if (dsi->irq < 0) { | |
e2d2a1e0 | 1754 | dev_err(dev, "failed to request dsi irq resource\n"); |
df5225bc ID |
1755 | ret = dsi->irq; |
1756 | goto err_del_component; | |
7eb8f069 AH |
1757 | } |
1758 | ||
1759 | irq_set_status_flags(dsi->irq, IRQ_NOAUTOEN); | |
e2d2a1e0 | 1760 | ret = devm_request_threaded_irq(dev, dsi->irq, NULL, |
7eb8f069 | 1761 | exynos_dsi_irq, IRQF_ONESHOT, |
e2d2a1e0 | 1762 | dev_name(dev), dsi); |
7eb8f069 | 1763 | if (ret) { |
e2d2a1e0 | 1764 | dev_err(dev, "failed to request dsi irq\n"); |
df5225bc | 1765 | goto err_del_component; |
7eb8f069 AH |
1766 | } |
1767 | ||
e2d2a1e0 | 1768 | platform_set_drvdata(pdev, &dsi->display); |
7eb8f069 | 1769 | |
e2d2a1e0 | 1770 | ret = component_add(dev, &exynos_dsi_component_ops); |
df5225bc ID |
1771 | if (ret) |
1772 | goto err_del_component; | |
1773 | ||
1774 | return ret; | |
1775 | ||
1776 | err_del_component: | |
e2d2a1e0 | 1777 | exynos_drm_component_del(dev, EXYNOS_DEVICE_TYPE_CONNECTOR); |
df5225bc | 1778 | return ret; |
7eb8f069 AH |
1779 | } |
1780 | ||
1781 | static int exynos_dsi_remove(struct platform_device *pdev) | |
1782 | { | |
df5225bc ID |
1783 | component_del(&pdev->dev, &exynos_dsi_component_ops); |
1784 | exynos_drm_component_del(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR); | |
1785 | ||
7eb8f069 AH |
1786 | return 0; |
1787 | } | |
1788 | ||
7eb8f069 AH |
1789 | struct platform_driver dsi_driver = { |
1790 | .probe = exynos_dsi_probe, | |
1791 | .remove = exynos_dsi_remove, | |
1792 | .driver = { | |
1793 | .name = "exynos-dsi", | |
1794 | .owner = THIS_MODULE, | |
7eb8f069 AH |
1795 | .of_match_table = exynos_dsi_of_match, |
1796 | }, | |
1797 | }; | |
1798 | ||
1799 | MODULE_AUTHOR("Tomasz Figa <t.figa@samsung.com>"); | |
1800 | MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>"); | |
1801 | MODULE_DESCRIPTION("Samsung SoC MIPI DSI Master"); | |
1802 | MODULE_LICENSE("GPL v2"); |