1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (c) 2019 Theobroma Systems Design und Consulting GmbH
4 *
5 * base on panel-kingdisplay-kd097d04.c
6 * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
7 */
8
9#include <linux/backlight.h>
10#include <linux/delay.h>
11#include <linux/gpio/consumer.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15#include <linux/regulator/consumer.h>
16
17#include <video/mipi_display.h>
18
19#include <drm/drm_crtc.h>
20#include <drm/drm_device.h>
21#include <drm/drm_mipi_dsi.h>
22#include <drm/drm_modes.h>
23#include <drm/drm_panel.h>
24
25struct ltk500hd1829_cmd {
26 char cmd;
27 char data;
28};
29
30struct ltk500hd1829_desc {
31 const struct drm_display_mode *mode;
32 const struct ltk500hd1829_cmd *init;
33 unsigned int num_init;
34};
35
36struct ltk500hd1829 {
37 struct device *dev;
38 struct drm_panel panel;
39 struct gpio_desc *reset_gpio;
40 struct regulator *vcc;
41 struct regulator *iovcc;
42 const struct ltk500hd1829_desc *panel_desc;
43 bool prepared;
44};
45
46static const struct ltk500hd1829_cmd ltk101b4029w_init[] = {
47 /* Page0 */
48 { 0xE0, 0x00 },
49 /* PASSWORD */
50 { 0xE1, 0x93 },
51 { 0xE2, 0x65 },
52 { 0xE3, 0xF8 },
53 { 0x80, 0x03 }, /* 0X03:4-LANE; 0X02:3-LANE; 0X01:2-LANE */
54 /* Page1 */
55 { 0xE0, 0x01 },
56 /* Set VCOM */
57 { 0x00, 0x00 },
58 { 0x01, 0x6F },
59 /* Set Gamma Power, VGMP,VGMN,VGSP,VGSN */
60 { 0x17, 0x00 },
61 { 0x18, 0xAF }, /* 4.3V */
62 { 0x19, 0x01 }, /* 0.3V */
63 { 0x1A, 0x00 },
64 { 0x1B, 0xAF }, /* 4.3V */
65 { 0x1C, 0x01 }, /* 0.3V */
66 /* Set Gate Power */
67 { 0x1F, 0x3E }, /* VGH_R = 15V */
68 { 0x20, 0x28 }, /* VGL_R = -12V */
69 { 0x21, 0x28 }, /* VGL_R2 = -12V */
70 { 0x22, 0x7E },
71 /* SETPANEL */
72 { 0x35, 0x26 },
73 { 0x37, 0x09 },
74 /* SET RGBCYC */
75 { 0x38, 0x04 },
76 { 0x39, 0x00 },
77 { 0x3A, 0x01 },
78 { 0x3C, 0x7C },
79 { 0x3D, 0xFF },
80 { 0x3E, 0xFF },
81 { 0x3F, 0x7F },
82 /* Set TCON */
83 { 0x40, 0x06 }, /* RSO = 800 RGB */
84 { 0x41, 0xA0 }, /* LN = 640->1280 line */
85 { 0x42, 0x81 },
86 { 0x43, 0x08 }, /* VFP = 8 */
87 { 0x44, 0x0B }, /* VBP = 12 */
88 { 0x45, 0x28 }, /* HBP = 40 */
89 /* power voltage */
90 { 0x55, 0x0F }, /* DCDCM = 0001, JD PWR_IC */
91 { 0x57, 0x69 },
92 { 0x59, 0x0A }, /* VCL = -2.9V */
93 { 0x5A, 0x28 }, /* VGH = 15V */
94 { 0x5B, 0x14 }, /* VGL = -11V */
95 /* Gamma */
96 { 0x5D, 0x7C },
97 { 0x5E, 0x65 },
98 { 0x5F, 0x55 },
99 { 0x60, 0x47 },
100 { 0x61, 0x43 },
101 { 0x62, 0x32 },
102 { 0x63, 0x34 },
103 { 0x64, 0x1C },
104 { 0x65, 0x33 },
105 { 0x66, 0x31 },
106 { 0x67, 0x30 },
107 { 0x68, 0x4E },
108 { 0x69, 0x3C },
109 { 0x6A, 0x44 },
110 { 0x6B, 0x35 },
111 { 0x6C, 0x31 },
112 { 0x6D, 0x23 },
113 { 0x6E, 0x11 },
114 { 0x6F, 0x00 },
115 { 0x70, 0x7C },
116 { 0x71, 0x65 },
117 { 0x72, 0x55 },
118 { 0x73, 0x47 },
119 { 0x74, 0x43 },
120 { 0x75, 0x32 },
121 { 0x76, 0x34 },
122 { 0x77, 0x1C },
123 { 0x78, 0x33 },
124 { 0x79, 0x31 },
125 { 0x7A, 0x30 },
126 { 0x7B, 0x4E },
127 { 0x7C, 0x3C },
128 { 0x7D, 0x44 },
129 { 0x7E, 0x35 },
130 { 0x7F, 0x31 },
131 { 0x80, 0x23 },
132 { 0x81, 0x11 },
133 { 0x82, 0x00 },
134 /* Page2, for GIP */
135 { 0xE0, 0x02 },
136 /* GIP_L Pin mapping */
137 { 0x00, 0x1E },
138 { 0x01, 0x1E },
139 { 0x02, 0x41 },
140 { 0x03, 0x41 },
141 { 0x04, 0x43 },
142 { 0x05, 0x43 },
143 { 0x06, 0x1F },
144 { 0x07, 0x1F },
145 { 0x08, 0x35 },
146 { 0x09, 0x1F },
147 { 0x0A, 0x15 },
148 { 0x0B, 0x15 },
149 { 0x0C, 0x1F },
150 { 0x0D, 0x47 },
151 { 0x0E, 0x47 },
152 { 0x0F, 0x45 },
153 { 0x10, 0x45 },
154 { 0x11, 0x4B },
155 { 0x12, 0x4B },
156 { 0x13, 0x49 },
157 { 0x14, 0x49 },
158 { 0x15, 0x1F },
159 /* GIP_R Pin mapping */
160 { 0x16, 0x1E },
161 { 0x17, 0x1E },
162 { 0x18, 0x40 },
163 { 0x19, 0x40 },
164 { 0x1A, 0x42 },
165 { 0x1B, 0x42 },
166 { 0x1C, 0x1F },
167 { 0x1D, 0x1F },
168 { 0x1E, 0x35 },
169 { 0x1F, 0x1F },
170 { 0x20, 0x15 },
171 { 0x21, 0x15 },
172 { 0x22, 0x1f },
173 { 0x23, 0x46 },
174 { 0x24, 0x46 },
175 { 0x25, 0x44 },
176 { 0x26, 0x44 },
177 { 0x27, 0x4A },
178 { 0x28, 0x4A },
179 { 0x29, 0x48 },
180 { 0x2A, 0x48 },
181 { 0x2B, 0x1F },
182 /* GIP Timing */
183 { 0x58, 0x40 },
184 { 0x5B, 0x30 },
185 { 0x5C, 0x03 },
186 { 0x5D, 0x30 },
187 { 0x5E, 0x01 },
188 { 0x5F, 0x02 },
189 { 0x63, 0x14 },
190 { 0x64, 0x6A },
191 { 0x67, 0x73 },
192 { 0x68, 0x05 },
193 { 0x69, 0x14 },
194 { 0x6A, 0x6A },
195 { 0x6B, 0x08 },
196 { 0x6C, 0x00 },
197 { 0x6D, 0x00 },
198 { 0x6E, 0x00 },
199 { 0x6F, 0x88 },
200 { 0x77, 0xDD },
201 { 0x79, 0x0E },
202 { 0x7A, 0x03 },
203 { 0x7D, 0x14 },
204 { 0x7E, 0x6A },
205 /* Page4 */
206 { 0xE0, 0x04 },
207 { 0x09, 0x11 },
208 { 0x0E, 0x48 },
209 { 0x2B, 0x2B },
210 { 0x2D, 0x03 },
211 { 0x2E, 0x44 },
212 /* Page0 */
213 { 0xE0, 0x00 },
214 { 0xE6, 0x02 },
215 { 0xE7, 0x0C },
216};
217
218static const struct drm_display_mode ltk101b4029w_mode = {
219 .hdisplay = 800,
220 .hsync_start = 800 + 18,
221 .hsync_end = 800 + 18 + 18,
222 .htotal = 800 + 18 + 18 + 18,
223 .vdisplay = 1280,
224 .vsync_start = 1280 + 24,
225 .vsync_end = 1280 + 24 + 4,
226 .vtotal = 1280 + 24 + 4 + 8,
227 .clock = 67330,
228 .width_mm = 136,
229 .height_mm = 218,
230};
231
232static const struct ltk500hd1829_desc ltk101b4029w_data = {
233 .mode = &ltk101b4029w_mode,
234 .init = ltk101b4029w_init,
235 .num_init = ARRAY_SIZE(ltk101b4029w_init),
236};
237
238/*
239 * There is no description in the Reference Manual about these commands.
240 * We received them from the vendor, so just use them as is.
241 */
242static const struct ltk500hd1829_cmd ltk500hd1829_init[] = {
243 { 0xE0, 0x00 },
244 { 0xE1, 0x93 },
245 { 0xE2, 0x65 },
246 { 0xE3, 0xF8 },
247 { 0x80, 0x03 },
248 { 0xE0, 0x04 },
249 { 0x2D, 0x03 },
250 { 0xE0, 0x01 },
251 { 0x00, 0x00 },
252 { 0x01, 0xB6 },
253 { 0x03, 0x00 },
254 { 0x04, 0xC5 },
255 { 0x17, 0x00 },
256 { 0x18, 0xBF },
257 { 0x19, 0x01 },
258 { 0x1A, 0x00 },
259 { 0x1B, 0xBF },
260 { 0x1C, 0x01 },
261 { 0x1F, 0x7C },
262 { 0x20, 0x26 },
263 { 0x21, 0x26 },
264 { 0x22, 0x4E },
265 { 0x37, 0x09 },
266 { 0x38, 0x04 },
267 { 0x39, 0x08 },
268 { 0x3A, 0x1F },
269 { 0x3B, 0x1F },
270 { 0x3C, 0x78 },
271 { 0x3D, 0xFF },
272 { 0x3E, 0xFF },
273 { 0x3F, 0x00 },
274 { 0x40, 0x04 },
275 { 0x41, 0xA0 },
276 { 0x43, 0x0F },
277 { 0x44, 0x0A },
278 { 0x45, 0x24 },
279 { 0x55, 0x01 },
280 { 0x56, 0x01 },
281 { 0x57, 0xA5 },
282 { 0x58, 0x0A },
283 { 0x59, 0x4A },
284 { 0x5A, 0x38 },
285 { 0x5B, 0x10 },
286 { 0x5C, 0x19 },
287 { 0x5D, 0x7C },
288 { 0x5E, 0x64 },
289 { 0x5F, 0x54 },
290 { 0x60, 0x48 },
291 { 0x61, 0x44 },
292 { 0x62, 0x35 },
293 { 0x63, 0x3A },
294 { 0x64, 0x24 },
295 { 0x65, 0x3B },
296 { 0x66, 0x39 },
297 { 0x67, 0x37 },
298 { 0x68, 0x56 },
299 { 0x69, 0x41 },
300 { 0x6A, 0x47 },
301 { 0x6B, 0x2F },
302 { 0x6C, 0x23 },
303 { 0x6D, 0x13 },
304 { 0x6E, 0x02 },
305 { 0x6F, 0x08 },
306 { 0x70, 0x7C },
307 { 0x71, 0x64 },
308 { 0x72, 0x54 },
309 { 0x73, 0x48 },
310 { 0x74, 0x44 },
311 { 0x75, 0x35 },
312 { 0x76, 0x3A },
313 { 0x77, 0x22 },
314 { 0x78, 0x3B },
315 { 0x79, 0x39 },
316 { 0x7A, 0x38 },
317 { 0x7B, 0x52 },
318 { 0x7C, 0x41 },
319 { 0x7D, 0x47 },
320 { 0x7E, 0x2F },
321 { 0x7F, 0x23 },
322 { 0x80, 0x13 },
323 { 0x81, 0x02 },
324 { 0x82, 0x08 },
325 { 0xE0, 0x02 },
326 { 0x00, 0x57 },
327 { 0x01, 0x77 },
328 { 0x02, 0x44 },
329 { 0x03, 0x46 },
330 { 0x04, 0x48 },
331 { 0x05, 0x4A },
332 { 0x06, 0x4C },
333 { 0x07, 0x4E },
334 { 0x08, 0x50 },
335 { 0x09, 0x55 },
336 { 0x0A, 0x52 },
337 { 0x0B, 0x55 },
338 { 0x0C, 0x55 },
339 { 0x0D, 0x55 },
340 { 0x0E, 0x55 },
341 { 0x0F, 0x55 },
342 { 0x10, 0x55 },
343 { 0x11, 0x55 },
344 { 0x12, 0x55 },
345 { 0x13, 0x40 },
346 { 0x14, 0x55 },
347 { 0x15, 0x55 },
348 { 0x16, 0x57 },
349 { 0x17, 0x77 },
350 { 0x18, 0x45 },
351 { 0x19, 0x47 },
352 { 0x1A, 0x49 },
353 { 0x1B, 0x4B },
354 { 0x1C, 0x4D },
355 { 0x1D, 0x4F },
356 { 0x1E, 0x51 },
357 { 0x1F, 0x55 },
358 { 0x20, 0x53 },
359 { 0x21, 0x55 },
360 { 0x22, 0x55 },
361 { 0x23, 0x55 },
362 { 0x24, 0x55 },
363 { 0x25, 0x55 },
364 { 0x26, 0x55 },
365 { 0x27, 0x55 },
366 { 0x28, 0x55 },
367 { 0x29, 0x41 },
368 { 0x2A, 0x55 },
369 { 0x2B, 0x55 },
370 { 0x2C, 0x57 },
371 { 0x2D, 0x77 },
372 { 0x2E, 0x4F },
373 { 0x2F, 0x4D },
374 { 0x30, 0x4B },
375 { 0x31, 0x49 },
376 { 0x32, 0x47 },
377 { 0x33, 0x45 },
378 { 0x34, 0x41 },
379 { 0x35, 0x55 },
380 { 0x36, 0x53 },
381 { 0x37, 0x55 },
382 { 0x38, 0x55 },
383 { 0x39, 0x55 },
384 { 0x3A, 0x55 },
385 { 0x3B, 0x55 },
386 { 0x3C, 0x55 },
387 { 0x3D, 0x55 },
388 { 0x3E, 0x55 },
389 { 0x3F, 0x51 },
390 { 0x40, 0x55 },
391 { 0x41, 0x55 },
392 { 0x42, 0x57 },
393 { 0x43, 0x77 },
394 { 0x44, 0x4E },
395 { 0x45, 0x4C },
396 { 0x46, 0x4A },
397 { 0x47, 0x48 },
398 { 0x48, 0x46 },
399 { 0x49, 0x44 },
400 { 0x4A, 0x40 },
401 { 0x4B, 0x55 },
402 { 0x4C, 0x52 },
403 { 0x4D, 0x55 },
404 { 0x4E, 0x55 },
405 { 0x4F, 0x55 },
406 { 0x50, 0x55 },
407 { 0x51, 0x55 },
408 { 0x52, 0x55 },
409 { 0x53, 0x55 },
410 { 0x54, 0x55 },
411 { 0x55, 0x50 },
412 { 0x56, 0x55 },
413 { 0x57, 0x55 },
414 { 0x58, 0x40 },
415 { 0x59, 0x00 },
416 { 0x5A, 0x00 },
417 { 0x5B, 0x10 },
418 { 0x5C, 0x09 },
419 { 0x5D, 0x30 },
420 { 0x5E, 0x01 },
421 { 0x5F, 0x02 },
422 { 0x60, 0x30 },
423 { 0x61, 0x03 },
424 { 0x62, 0x04 },
425 { 0x63, 0x06 },
426 { 0x64, 0x6A },
427 { 0x65, 0x75 },
428 { 0x66, 0x0F },
429 { 0x67, 0xB3 },
430 { 0x68, 0x0B },
431 { 0x69, 0x06 },
432 { 0x6A, 0x6A },
433 { 0x6B, 0x10 },
434 { 0x6C, 0x00 },
435 { 0x6D, 0x04 },
436 { 0x6E, 0x04 },
437 { 0x6F, 0x88 },
438 { 0x70, 0x00 },
439 { 0x71, 0x00 },
440 { 0x72, 0x06 },
441 { 0x73, 0x7B },
442 { 0x74, 0x00 },
443 { 0x75, 0xBC },
444 { 0x76, 0x00 },
445 { 0x77, 0x05 },
446 { 0x78, 0x2E },
447 { 0x79, 0x00 },
448 { 0x7A, 0x00 },
449 { 0x7B, 0x00 },
450 { 0x7C, 0x00 },
451 { 0x7D, 0x03 },
452 { 0x7E, 0x7B },
453 { 0xE0, 0x04 },
454 { 0x09, 0x10 },
455 { 0x2B, 0x2B },
456 { 0x2E, 0x44 },
457 { 0xE0, 0x00 },
458 { 0xE6, 0x02 },
459 { 0xE7, 0x02 },
460 { 0x35, 0x00 },
461};
462
463static const struct drm_display_mode ltk500hd1829_mode = {
464 .hdisplay = 720,
465 .hsync_start = 720 + 50,
466 .hsync_end = 720 + 50 + 50,
467 .htotal = 720 + 50 + 50 + 50,
468 .vdisplay = 1280,
469 .vsync_start = 1280 + 30,
470 .vsync_end = 1280 + 30 + 4,
471 .vtotal = 1280 + 30 + 4 + 12,
472 .clock = 69217,
473 .width_mm = 62,
474 .height_mm = 110,
475};
476
477static const struct ltk500hd1829_desc ltk500hd1829_data = {
478 .mode = &ltk500hd1829_mode,
479 .init = ltk500hd1829_init,
480 .num_init = ARRAY_SIZE(ltk500hd1829_init),
481};
482
483static inline
484struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel)
485{
486 return container_of(panel, struct ltk500hd1829, panel);
487}
488
489static int ltk500hd1829_unprepare(struct drm_panel *panel)
490{
491 struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
492 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
493 int ret;
494
495 if (!ctx->prepared)
496 return 0;
497
498 ret = mipi_dsi_dcs_set_display_off(dsi);
499 if (ret < 0)
500 dev_err(panel->dev, "failed to set display off: %d\n", ret);
501
502 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
503 if (ret < 0) {
504 dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);
505 }
506
507 /* 120ms to enter sleep mode */
508 msleep(msecs: 120);
509
510 regulator_disable(regulator: ctx->iovcc);
511 regulator_disable(regulator: ctx->vcc);
512
513 ctx->prepared = false;
514
515 return 0;
516}
517
518static int ltk500hd1829_prepare(struct drm_panel *panel)
519{
520 struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
521 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
522 unsigned int i;
523 int ret;
524
525 if (ctx->prepared)
526 return 0;
527
528 ret = regulator_enable(regulator: ctx->vcc);
529 if (ret < 0) {
530 dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);
531 return ret;
532 }
533 ret = regulator_enable(regulator: ctx->iovcc);
534 if (ret < 0) {
535 dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
536 goto disable_vcc;
537 }
538
539 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 1);
540 /* tRW: 10us */
541 usleep_range(min: 10, max: 20);
542 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 0);
543
544 /* tRT: >= 5ms */
545 usleep_range(min: 5000, max: 6000);
546
547 for (i = 0; i < ctx->panel_desc->num_init; i++) {
548 ret = mipi_dsi_generic_write(dsi, payload: &ctx->panel_desc->init[i],
549 size: sizeof(struct ltk500hd1829_cmd));
550 if (ret < 0) {
551 dev_err(panel->dev, "failed to write init cmds: %d\n", ret);
552 goto disable_iovcc;
553 }
554 }
555
556 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
557 if (ret < 0) {
558 dev_err(panel->dev, "failed to exit sleep mode: %d\n", ret);
559 goto disable_iovcc;
560 }
561
562 /* 120ms to exit sleep mode */
563 msleep(msecs: 120);
564
565 ret = mipi_dsi_dcs_set_display_on(dsi);
566 if (ret < 0) {
567 dev_err(panel->dev, "failed to set display on: %d\n", ret);
568 goto disable_iovcc;
569 }
570
571 ctx->prepared = true;
572
573 return 0;
574
575disable_iovcc:
576 regulator_disable(regulator: ctx->iovcc);
577disable_vcc:
578 regulator_disable(regulator: ctx->vcc);
579 return ret;
580}
581
582static int ltk500hd1829_get_modes(struct drm_panel *panel,
583 struct drm_connector *connector)
584{
585 struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
586 struct drm_display_mode *mode;
587
588 mode = drm_mode_duplicate(dev: connector->dev, mode: ctx->panel_desc->mode);
589 if (!mode) {
590 dev_err(ctx->dev, "failed to add mode %ux%u@%u\n",
591 ctx->panel_desc->mode->hdisplay, ctx->panel_desc->mode->vdisplay,
592 drm_mode_vrefresh(ctx->panel_desc->mode));
593 return -ENOMEM;
594 }
595
596 drm_mode_set_name(mode);
597
598 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
599 connector->display_info.width_mm = mode->width_mm;
600 connector->display_info.height_mm = mode->height_mm;
601 drm_mode_probed_add(connector, mode);
602
603 return 1;
604}
605
606static const struct drm_panel_funcs ltk500hd1829_funcs = {
607 .unprepare = ltk500hd1829_unprepare,
608 .prepare = ltk500hd1829_prepare,
609 .get_modes = ltk500hd1829_get_modes,
610};
611
612static int ltk500hd1829_probe(struct mipi_dsi_device *dsi)
613{
614 struct ltk500hd1829 *ctx;
615 struct device *dev = &dsi->dev;
616 int ret;
617
618 ctx = devm_kzalloc(dev: &dsi->dev, size: sizeof(*ctx), GFP_KERNEL);
619 if (!ctx)
620 return -ENOMEM;
621
622 ctx->panel_desc = of_device_get_match_data(dev);
623 if (!ctx->panel_desc)
624 return -EINVAL;
625
626 ctx->reset_gpio = devm_gpiod_get_optional(dev, con_id: "reset", flags: GPIOD_OUT_LOW);
627 if (IS_ERR(ptr: ctx->reset_gpio)) {
628 dev_err(dev, "cannot get reset gpio\n");
629 return PTR_ERR(ptr: ctx->reset_gpio);
630 }
631
632 ctx->vcc = devm_regulator_get(dev, id: "vcc");
633 if (IS_ERR(ptr: ctx->vcc)) {
634 ret = PTR_ERR(ptr: ctx->vcc);
635 if (ret != -EPROBE_DEFER)
636 dev_err(dev, "Failed to request vcc regulator: %d\n", ret);
637 return ret;
638 }
639
640 ctx->iovcc = devm_regulator_get(dev, id: "iovcc");
641 if (IS_ERR(ptr: ctx->iovcc)) {
642 ret = PTR_ERR(ptr: ctx->iovcc);
643 if (ret != -EPROBE_DEFER)
644 dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);
645 return ret;
646 }
647
648 mipi_dsi_set_drvdata(dsi, data: ctx);
649
650 ctx->dev = dev;
651
652 dsi->lanes = 4;
653 dsi->format = MIPI_DSI_FMT_RGB888;
654 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
655 MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET;
656
657 drm_panel_init(panel: &ctx->panel, dev: &dsi->dev, funcs: &ltk500hd1829_funcs,
658 DRM_MODE_CONNECTOR_DSI);
659
660 ret = drm_panel_of_backlight(panel: &ctx->panel);
661 if (ret)
662 return ret;
663
664 drm_panel_add(panel: &ctx->panel);
665
666 ret = mipi_dsi_attach(dsi);
667 if (ret < 0) {
668 dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
669 drm_panel_remove(panel: &ctx->panel);
670 return ret;
671 }
672
673 return 0;
674}
675
676static void ltk500hd1829_shutdown(struct mipi_dsi_device *dsi)
677{
678 struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
679 int ret;
680
681 ret = drm_panel_unprepare(panel: &ctx->panel);
682 if (ret < 0)
683 dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
684
685 ret = drm_panel_disable(panel: &ctx->panel);
686 if (ret < 0)
687 dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
688}
689
690static void ltk500hd1829_remove(struct mipi_dsi_device *dsi)
691{
692 struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
693 int ret;
694
695 ltk500hd1829_shutdown(dsi);
696
697 ret = mipi_dsi_detach(dsi);
698 if (ret < 0)
699 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
700
701 drm_panel_remove(panel: &ctx->panel);
702}
703
704static const struct of_device_id ltk500hd1829_of_match[] = {
705 {
706 .compatible = "leadtek,ltk101b4029w",
707 .data = &ltk101b4029w_data,
708 },
709 {
710 .compatible = "leadtek,ltk500hd1829",
711 .data = &ltk500hd1829_data,
712 },
713 { /* sentinel */ }
714};
715MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match);
716
717static struct mipi_dsi_driver ltk500hd1829_driver = {
718 .driver = {
719 .name = "panel-leadtek-ltk500hd1829",
720 .of_match_table = ltk500hd1829_of_match,
721 },
722 .probe = ltk500hd1829_probe,
723 .remove = ltk500hd1829_remove,
724 .shutdown = ltk500hd1829_shutdown,
725};
726module_mipi_dsi_driver(ltk500hd1829_driver);
727
728MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
729MODULE_DESCRIPTION("Leadtek LTK500HD1829 panel driver");
730MODULE_LICENSE("GPL v2");
731

source code of linux/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c