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(120);
509
510	regulator_disable(ctx->iovcc);
511	regulator_disable(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(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(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(ctx->reset_gpio, 1);
540	/* tRW: 10us */
541	usleep_range(10, 20);
542	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
543
544	/* tRT: >= 5ms */
545	usleep_range(5000, 6000);
546
547	for (i = 0; i < ctx->panel_desc->num_init; i++) {
548		ret = mipi_dsi_generic_write(dsi, &ctx->panel_desc->init[i],
549					     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(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(ctx->iovcc);
577disable_vcc:
578	regulator_disable(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(connector->dev, 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(&dsi->dev, 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, "reset", GPIOD_OUT_LOW);
627	if (IS_ERR(ctx->reset_gpio)) {
628		dev_err(dev, "cannot get reset gpio\n");
629		return PTR_ERR(ctx->reset_gpio);
630	}
631
632	ctx->vcc = devm_regulator_get(dev, "vcc");
633	if (IS_ERR(ctx->vcc)) {
634		ret = PTR_ERR(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, "iovcc");
641	if (IS_ERR(ctx->iovcc)) {
642		ret = PTR_ERR(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, 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(&ctx->panel, &dsi->dev, &ltk500hd1829_funcs,
658		       DRM_MODE_CONNECTOR_DSI);
659
660	ret = drm_panel_of_backlight(&ctx->panel);
661	if (ret)
662		return ret;
663
664	drm_panel_add(&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(&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(&ctx->panel);
682	if (ret < 0)
683		dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
684
685	ret = drm_panel_disable(&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(&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