1// SPDX-License-Identifier: GPL-2.0
2/*
3 * NewVision NV3052C IPS LCD panel driver
4 *
5 * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
6 * Copyright (C) 2022, Christophe Branchereau <cbranchereau@gmail.com>
7 */
8
9#include <linux/delay.h>
10#include <linux/device.h>
11#include <linux/gpio/consumer.h>
12#include <linux/media-bus-format.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/platform_device.h>
16#include <linux/regulator/consumer.h>
17#include <linux/spi/spi.h>
18#include <video/mipi_display.h>
19#include <drm/drm_mipi_dbi.h>
20#include <drm/drm_modes.h>
21#include <drm/drm_panel.h>
22
23struct nv3052c_reg {
24 u8 cmd;
25 u8 val;
26};
27
28struct nv3052c_panel_info {
29 const struct drm_display_mode *display_modes;
30 unsigned int num_modes;
31 u16 width_mm, height_mm;
32 u32 bus_format, bus_flags;
33 const struct nv3052c_reg *panel_regs;
34 unsigned int panel_regs_len;
35};
36
37struct nv3052c {
38 struct device *dev;
39 struct drm_panel panel;
40 struct mipi_dbi dbi;
41 const struct nv3052c_panel_info *panel_info;
42 struct regulator *supply;
43 struct gpio_desc *reset_gpio;
44};
45
46static const struct nv3052c_reg ltk035c5444t_panel_regs[] = {
47 // EXTC Command set enable, select page 1
48 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x01 },
49 // Mostly unknown registers
50 { 0xe3, 0x00 },
51 { 0x40, 0x00 },
52 { 0x03, 0x40 },
53 { 0x04, 0x00 },
54 { 0x05, 0x03 },
55 { 0x08, 0x00 },
56 { 0x09, 0x07 },
57 { 0x0a, 0x01 },
58 { 0x0b, 0x32 },
59 { 0x0c, 0x32 },
60 { 0x0d, 0x0b },
61 { 0x0e, 0x00 },
62 { 0x23, 0xa0 },
63 { 0x24, 0x0c },
64 { 0x25, 0x06 },
65 { 0x26, 0x14 },
66 { 0x27, 0x14 },
67 { 0x38, 0xcc }, // VCOM_ADJ1
68 { 0x39, 0xd7 }, // VCOM_ADJ2
69 { 0x3a, 0x4a }, // VCOM_ADJ3
70 { 0x28, 0x40 },
71 { 0x29, 0x01 },
72 { 0x2a, 0xdf },
73 { 0x49, 0x3c },
74 { 0x91, 0x77 }, // EXTPW_CTRL2
75 { 0x92, 0x77 }, // EXTPW_CTRL3
76 { 0xa0, 0x55 },
77 { 0xa1, 0x50 },
78 { 0xa4, 0x9c },
79 { 0xa7, 0x02 },
80 { 0xa8, 0x01 },
81 { 0xa9, 0x01 },
82 { 0xaa, 0xfc },
83 { 0xab, 0x28 },
84 { 0xac, 0x06 },
85 { 0xad, 0x06 },
86 { 0xae, 0x06 },
87 { 0xaf, 0x03 },
88 { 0xb0, 0x08 },
89 { 0xb1, 0x26 },
90 { 0xb2, 0x28 },
91 { 0xb3, 0x28 },
92 { 0xb4, 0x33 },
93 { 0xb5, 0x08 },
94 { 0xb6, 0x26 },
95 { 0xb7, 0x08 },
96 { 0xb8, 0x26 },
97 { 0xf0, 0x00 },
98 { 0xf6, 0xc0 },
99 // EXTC Command set enable, select page 2
100 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x02 },
101 // Set gray scale voltage to adjust gamma
102 { 0xb0, 0x0b }, // PGAMVR0
103 { 0xb1, 0x16 }, // PGAMVR1
104 { 0xb2, 0x17 }, // PGAMVR2
105 { 0xb3, 0x2c }, // PGAMVR3
106 { 0xb4, 0x32 }, // PGAMVR4
107 { 0xb5, 0x3b }, // PGAMVR5
108 { 0xb6, 0x29 }, // PGAMPR0
109 { 0xb7, 0x40 }, // PGAMPR1
110 { 0xb8, 0x0d }, // PGAMPK0
111 { 0xb9, 0x05 }, // PGAMPK1
112 { 0xba, 0x12 }, // PGAMPK2
113 { 0xbb, 0x10 }, // PGAMPK3
114 { 0xbc, 0x12 }, // PGAMPK4
115 { 0xbd, 0x15 }, // PGAMPK5
116 { 0xbe, 0x19 }, // PGAMPK6
117 { 0xbf, 0x0e }, // PGAMPK7
118 { 0xc0, 0x16 }, // PGAMPK8
119 { 0xc1, 0x0a }, // PGAMPK9
120 // Set gray scale voltage to adjust gamma
121 { 0xd0, 0x0c }, // NGAMVR0
122 { 0xd1, 0x17 }, // NGAMVR0
123 { 0xd2, 0x14 }, // NGAMVR1
124 { 0xd3, 0x2e }, // NGAMVR2
125 { 0xd4, 0x32 }, // NGAMVR3
126 { 0xd5, 0x3c }, // NGAMVR4
127 { 0xd6, 0x22 }, // NGAMPR0
128 { 0xd7, 0x3d }, // NGAMPR1
129 { 0xd8, 0x0d }, // NGAMPK0
130 { 0xd9, 0x07 }, // NGAMPK1
131 { 0xda, 0x13 }, // NGAMPK2
132 { 0xdb, 0x13 }, // NGAMPK3
133 { 0xdc, 0x11 }, // NGAMPK4
134 { 0xdd, 0x15 }, // NGAMPK5
135 { 0xde, 0x19 }, // NGAMPK6
136 { 0xdf, 0x10 }, // NGAMPK7
137 { 0xe0, 0x17 }, // NGAMPK8
138 { 0xe1, 0x0a }, // NGAMPK9
139 // EXTC Command set enable, select page 3
140 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x03 },
141 // Set various timing settings
142 { 0x00, 0x2a }, // GIP_VST_1
143 { 0x01, 0x2a }, // GIP_VST_2
144 { 0x02, 0x2a }, // GIP_VST_3
145 { 0x03, 0x2a }, // GIP_VST_4
146 { 0x04, 0x61 }, // GIP_VST_5
147 { 0x05, 0x80 }, // GIP_VST_6
148 { 0x06, 0xc7 }, // GIP_VST_7
149 { 0x07, 0x01 }, // GIP_VST_8
150 { 0x08, 0x03 }, // GIP_VST_9
151 { 0x09, 0x04 }, // GIP_VST_10
152 { 0x70, 0x22 }, // GIP_ECLK1
153 { 0x71, 0x80 }, // GIP_ECLK2
154 { 0x30, 0x2a }, // GIP_CLK_1
155 { 0x31, 0x2a }, // GIP_CLK_2
156 { 0x32, 0x2a }, // GIP_CLK_3
157 { 0x33, 0x2a }, // GIP_CLK_4
158 { 0x34, 0x61 }, // GIP_CLK_5
159 { 0x35, 0xc5 }, // GIP_CLK_6
160 { 0x36, 0x80 }, // GIP_CLK_7
161 { 0x37, 0x23 }, // GIP_CLK_8
162 { 0x40, 0x03 }, // GIP_CLKA_1
163 { 0x41, 0x04 }, // GIP_CLKA_2
164 { 0x42, 0x05 }, // GIP_CLKA_3
165 { 0x43, 0x06 }, // GIP_CLKA_4
166 { 0x44, 0x11 }, // GIP_CLKA_5
167 { 0x45, 0xe8 }, // GIP_CLKA_6
168 { 0x46, 0xe9 }, // GIP_CLKA_7
169 { 0x47, 0x11 }, // GIP_CLKA_8
170 { 0x48, 0xea }, // GIP_CLKA_9
171 { 0x49, 0xeb }, // GIP_CLKA_10
172 { 0x50, 0x07 }, // GIP_CLKB_1
173 { 0x51, 0x08 }, // GIP_CLKB_2
174 { 0x52, 0x09 }, // GIP_CLKB_3
175 { 0x53, 0x0a }, // GIP_CLKB_4
176 { 0x54, 0x11 }, // GIP_CLKB_5
177 { 0x55, 0xec }, // GIP_CLKB_6
178 { 0x56, 0xed }, // GIP_CLKB_7
179 { 0x57, 0x11 }, // GIP_CLKB_8
180 { 0x58, 0xef }, // GIP_CLKB_9
181 { 0x59, 0xf0 }, // GIP_CLKB_10
182 // Map internal GOA signals to GOA output pad
183 { 0xb1, 0x01 }, // PANELD2U2
184 { 0xb4, 0x15 }, // PANELD2U5
185 { 0xb5, 0x16 }, // PANELD2U6
186 { 0xb6, 0x09 }, // PANELD2U7
187 { 0xb7, 0x0f }, // PANELD2U8
188 { 0xb8, 0x0d }, // PANELD2U9
189 { 0xb9, 0x0b }, // PANELD2U10
190 { 0xba, 0x00 }, // PANELD2U11
191 { 0xc7, 0x02 }, // PANELD2U24
192 { 0xca, 0x17 }, // PANELD2U27
193 { 0xcb, 0x18 }, // PANELD2U28
194 { 0xcc, 0x0a }, // PANELD2U29
195 { 0xcd, 0x10 }, // PANELD2U30
196 { 0xce, 0x0e }, // PANELD2U31
197 { 0xcf, 0x0c }, // PANELD2U32
198 { 0xd0, 0x00 }, // PANELD2U33
199 // Map internal GOA signals to GOA output pad
200 { 0x81, 0x00 }, // PANELU2D2
201 { 0x84, 0x15 }, // PANELU2D5
202 { 0x85, 0x16 }, // PANELU2D6
203 { 0x86, 0x10 }, // PANELU2D7
204 { 0x87, 0x0a }, // PANELU2D8
205 { 0x88, 0x0c }, // PANELU2D9
206 { 0x89, 0x0e }, // PANELU2D10
207 { 0x8a, 0x02 }, // PANELU2D11
208 { 0x97, 0x00 }, // PANELU2D24
209 { 0x9a, 0x17 }, // PANELU2D27
210 { 0x9b, 0x18 }, // PANELU2D28
211 { 0x9c, 0x0f }, // PANELU2D29
212 { 0x9d, 0x09 }, // PANELU2D30
213 { 0x9e, 0x0b }, // PANELU2D31
214 { 0x9f, 0x0d }, // PANELU2D32
215 { 0xa0, 0x01 }, // PANELU2D33
216 // EXTC Command set enable, select page 2
217 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x02 },
218 // Unknown registers
219 { 0x01, 0x01 },
220 { 0x02, 0xda },
221 { 0x03, 0xba },
222 { 0x04, 0xa8 },
223 { 0x05, 0x9a },
224 { 0x06, 0x70 },
225 { 0x07, 0xff },
226 { 0x08, 0x91 },
227 { 0x09, 0x90 },
228 { 0x0a, 0xff },
229 { 0x0b, 0x8f },
230 { 0x0c, 0x60 },
231 { 0x0d, 0x58 },
232 { 0x0e, 0x48 },
233 { 0x0f, 0x38 },
234 { 0x10, 0x2b },
235 // EXTC Command set enable, select page 0
236 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x00 },
237 // Display Access Control
238 { 0x36, 0x0a }, // bgr = 1, ss = 1, gs = 0
239};
240
241static const struct nv3052c_reg fs035vg158_panel_regs[] = {
242 // EXTC Command set enable, select page 1
243 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x01 },
244 // Mostly unknown registers
245 { 0xe3, 0x00 },
246 { 0x40, 0x00 },
247 { 0x03, 0x40 },
248 { 0x04, 0x00 },
249 { 0x05, 0x03 },
250 { 0x08, 0x00 },
251 { 0x09, 0x07 },
252 { 0x0a, 0x01 },
253 { 0x0b, 0x32 },
254 { 0x0c, 0x32 },
255 { 0x0d, 0x0b },
256 { 0x0e, 0x00 },
257 { 0x23, 0x20 }, // RGB interface control: DE MODE PCLK-N
258 { 0x24, 0x0c },
259 { 0x25, 0x06 },
260 { 0x26, 0x14 },
261 { 0x27, 0x14 },
262 { 0x38, 0x9c }, //VCOM_ADJ1, different to ltk035c5444t
263 { 0x39, 0xa7 }, //VCOM_ADJ2, different to ltk035c5444t
264 { 0x3a, 0x50 }, //VCOM_ADJ3, different to ltk035c5444t
265 { 0x28, 0x40 },
266 { 0x29, 0x01 },
267 { 0x2a, 0xdf },
268 { 0x49, 0x3c },
269 { 0x91, 0x57 }, //EXTPW_CTRL2, different to ltk035c5444t
270 { 0x92, 0x57 }, //EXTPW_CTRL3, different to ltk035c5444t
271 { 0xa0, 0x55 },
272 { 0xa1, 0x50 },
273 { 0xa4, 0x9c },
274 { 0xa7, 0x02 },
275 { 0xa8, 0x01 },
276 { 0xa9, 0x01 },
277 { 0xaa, 0xfc },
278 { 0xab, 0x28 },
279 { 0xac, 0x06 },
280 { 0xad, 0x06 },
281 { 0xae, 0x06 },
282 { 0xaf, 0x03 },
283 { 0xb0, 0x08 },
284 { 0xb1, 0x26 },
285 { 0xb2, 0x28 },
286 { 0xb3, 0x28 },
287 { 0xb4, 0x03 }, // Unknown, different to ltk035c5444
288 { 0xb5, 0x08 },
289 { 0xb6, 0x26 },
290 { 0xb7, 0x08 },
291 { 0xb8, 0x26 },
292 { 0xf0, 0x00 },
293 { 0xf6, 0xc0 },
294 // EXTC Command set enable, select page 0
295 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x02 },
296 // Set gray scale voltage to adjust gamma
297 { 0xb0, 0x0b }, // PGAMVR0
298 { 0xb1, 0x16 }, // PGAMVR1
299 { 0xb2, 0x17 }, // PGAMVR2
300 { 0xb3, 0x2c }, // PGAMVR3
301 { 0xb4, 0x32 }, // PGAMVR4
302 { 0xb5, 0x3b }, // PGAMVR5
303 { 0xb6, 0x29 }, // PGAMPR0
304 { 0xb7, 0x40 }, // PGAMPR1
305 { 0xb8, 0x0d }, // PGAMPK0
306 { 0xb9, 0x05 }, // PGAMPK1
307 { 0xba, 0x12 }, // PGAMPK2
308 { 0xbb, 0x10 }, // PGAMPK3
309 { 0xbc, 0x12 }, // PGAMPK4
310 { 0xbd, 0x15 }, // PGAMPK5
311 { 0xbe, 0x19 }, // PGAMPK6
312 { 0xbf, 0x0e }, // PGAMPK7
313 { 0xc0, 0x16 }, // PGAMPK8
314 { 0xc1, 0x0a }, // PGAMPK9
315 // Set gray scale voltage to adjust gamma
316 { 0xd0, 0x0c }, // NGAMVR0
317 { 0xd1, 0x17 }, // NGAMVR0
318 { 0xd2, 0x14 }, // NGAMVR1
319 { 0xd3, 0x2e }, // NGAMVR2
320 { 0xd4, 0x32 }, // NGAMVR3
321 { 0xd5, 0x3c }, // NGAMVR4
322 { 0xd6, 0x22 }, // NGAMPR0
323 { 0xd7, 0x3d }, // NGAMPR1
324 { 0xd8, 0x0d }, // NGAMPK0
325 { 0xd9, 0x07 }, // NGAMPK1
326 { 0xda, 0x13 }, // NGAMPK2
327 { 0xdb, 0x13 }, // NGAMPK3
328 { 0xdc, 0x11 }, // NGAMPK4
329 { 0xdd, 0x15 }, // NGAMPK5
330 { 0xde, 0x19 }, // NGAMPK6
331 { 0xdf, 0x10 }, // NGAMPK7
332 { 0xe0, 0x17 }, // NGAMPK8
333 { 0xe1, 0x0a }, // NGAMPK9
334 // EXTC Command set enable, select page 3
335 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x03 },
336 // Set various timing settings
337 { 0x00, 0x2a }, // GIP_VST_1
338 { 0x01, 0x2a }, // GIP_VST_2
339 { 0x02, 0x2a }, // GIP_VST_3
340 { 0x03, 0x2a }, // GIP_VST_4
341 { 0x04, 0x61 }, // GIP_VST_5
342 { 0x05, 0x80 }, // GIP_VST_6
343 { 0x06, 0xc7 }, // GIP_VST_7
344 { 0x07, 0x01 }, // GIP_VST_8
345 { 0x08, 0x03 }, // GIP_VST_9
346 { 0x09, 0x04 }, // GIP_VST_10
347 { 0x70, 0x22 }, // GIP_ECLK1
348 { 0x71, 0x80 }, // GIP_ECLK2
349 { 0x30, 0x2a }, // GIP_CLK_1
350 { 0x31, 0x2a }, // GIP_CLK_2
351 { 0x32, 0x2a }, // GIP_CLK_3
352 { 0x33, 0x2a }, // GIP_CLK_4
353 { 0x34, 0x61 }, // GIP_CLK_5
354 { 0x35, 0xc5 }, // GIP_CLK_6
355 { 0x36, 0x80 }, // GIP_CLK_7
356 { 0x37, 0x23 }, // GIP_CLK_8
357 { 0x40, 0x03 }, // GIP_CLKA_1
358 { 0x41, 0x04 }, // GIP_CLKA_2
359 { 0x42, 0x05 }, // GIP_CLKA_3
360 { 0x43, 0x06 }, // GIP_CLKA_4
361 { 0x44, 0x11 }, // GIP_CLKA_5
362 { 0x45, 0xe8 }, // GIP_CLKA_6
363 { 0x46, 0xe9 }, // GIP_CLKA_7
364 { 0x47, 0x11 }, // GIP_CLKA_8
365 { 0x48, 0xea }, // GIP_CLKA_9
366 { 0x49, 0xeb }, // GIP_CLKA_10
367 { 0x50, 0x07 }, // GIP_CLKB_1
368 { 0x51, 0x08 }, // GIP_CLKB_2
369 { 0x52, 0x09 }, // GIP_CLKB_3
370 { 0x53, 0x0a }, // GIP_CLKB_4
371 { 0x54, 0x11 }, // GIP_CLKB_5
372 { 0x55, 0xec }, // GIP_CLKB_6
373 { 0x56, 0xed }, // GIP_CLKB_7
374 { 0x57, 0x11 }, // GIP_CLKB_8
375 { 0x58, 0xef }, // GIP_CLKB_9
376 { 0x59, 0xf0 }, // GIP_CLKB_10
377 // Map internal GOA signals to GOA output pad
378 { 0xb1, 0x01 }, // PANELD2U2
379 { 0xb4, 0x15 }, // PANELD2U5
380 { 0xb5, 0x16 }, // PANELD2U6
381 { 0xb6, 0x09 }, // PANELD2U7
382 { 0xb7, 0x0f }, // PANELD2U8
383 { 0xb8, 0x0d }, // PANELD2U9
384 { 0xb9, 0x0b }, // PANELD2U10
385 { 0xba, 0x00 }, // PANELD2U11
386 { 0xc7, 0x02 }, // PANELD2U24
387 { 0xca, 0x17 }, // PANELD2U27
388 { 0xcb, 0x18 }, // PANELD2U28
389 { 0xcc, 0x0a }, // PANELD2U29
390 { 0xcd, 0x10 }, // PANELD2U30
391 { 0xce, 0x0e }, // PANELD2U31
392 { 0xcf, 0x0c }, // PANELD2U32
393 { 0xd0, 0x00 }, // PANELD2U33
394 // Map internal GOA signals to GOA output pad
395 { 0x81, 0x00 }, // PANELU2D2
396 { 0x84, 0x15 }, // PANELU2D5
397 { 0x85, 0x16 }, // PANELU2D6
398 { 0x86, 0x10 }, // PANELU2D7
399 { 0x87, 0x0a }, // PANELU2D8
400 { 0x88, 0x0c }, // PANELU2D9
401 { 0x89, 0x0e }, // PANELU2D10
402 { 0x8a, 0x02 }, // PANELU2D11
403 { 0x97, 0x00 }, // PANELU2D24
404 { 0x9a, 0x17 }, // PANELU2D27
405 { 0x9b, 0x18 }, // PANELU2D28
406 { 0x9c, 0x0f }, // PANELU2D29
407 { 0x9d, 0x09 }, // PANELU2D30
408 { 0x9e, 0x0b }, // PANELU2D31
409 { 0x9f, 0x0d }, // PANELU2D32
410 { 0xa0, 0x01 }, // PANELU2D33
411 // EXTC Command set enable, select page 2
412 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x02 },
413 // Unknown registers
414 { 0x01, 0x01 },
415 { 0x02, 0xda },
416 { 0x03, 0xba },
417 { 0x04, 0xa8 },
418 { 0x05, 0x9a },
419 { 0x06, 0x70 },
420 { 0x07, 0xff },
421 { 0x08, 0x91 },
422 { 0x09, 0x90 },
423 { 0x0a, 0xff },
424 { 0x0b, 0x8f },
425 { 0x0c, 0x60 },
426 { 0x0d, 0x58 },
427 { 0x0e, 0x48 },
428 { 0x0f, 0x38 },
429 { 0x10, 0x2b },
430 // EXTC Command set enable, select page 0
431 { 0xff, 0x30 }, { 0xff, 0x52 }, { 0xff, 0x00 },
432 // Display Access Control
433 { 0x36, 0x0a }, // bgr = 1, ss = 1, gs = 0
434};
435
436static inline struct nv3052c *to_nv3052c(struct drm_panel *panel)
437{
438 return container_of(panel, struct nv3052c, panel);
439}
440
441static int nv3052c_prepare(struct drm_panel *panel)
442{
443 struct nv3052c *priv = to_nv3052c(panel);
444 const struct nv3052c_reg *panel_regs = priv->panel_info->panel_regs;
445 unsigned int panel_regs_len = priv->panel_info->panel_regs_len;
446 struct mipi_dbi *dbi = &priv->dbi;
447 unsigned int i;
448 int err;
449
450 err = regulator_enable(regulator: priv->supply);
451 if (err) {
452 dev_err(priv->dev, "Failed to enable power supply: %d\n", err);
453 return err;
454 }
455
456 /* Reset the chip */
457 gpiod_set_value_cansleep(desc: priv->reset_gpio, value: 1);
458 usleep_range(min: 10, max: 1000);
459 gpiod_set_value_cansleep(desc: priv->reset_gpio, value: 0);
460 usleep_range(min: 5000, max: 20000);
461
462 for (i = 0; i < panel_regs_len; i++) {
463 err = mipi_dbi_command(dbi, panel_regs[i].cmd,
464 panel_regs[i].val);
465
466 if (err) {
467 dev_err(priv->dev, "Unable to set register: %d\n", err);
468 goto err_disable_regulator;
469 }
470 }
471
472 err = mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
473 if (err) {
474 dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);
475 goto err_disable_regulator;
476 }
477
478 return 0;
479
480err_disable_regulator:
481 regulator_disable(regulator: priv->supply);
482 return err;
483}
484
485static int nv3052c_unprepare(struct drm_panel *panel)
486{
487 struct nv3052c *priv = to_nv3052c(panel);
488 struct mipi_dbi *dbi = &priv->dbi;
489 int err;
490
491 err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
492 if (err)
493 dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);
494
495 gpiod_set_value_cansleep(desc: priv->reset_gpio, value: 1);
496 regulator_disable(regulator: priv->supply);
497
498 return 0;
499}
500
501static int nv3052c_enable(struct drm_panel *panel)
502{
503 struct nv3052c *priv = to_nv3052c(panel);
504 struct mipi_dbi *dbi = &priv->dbi;
505 int err;
506
507 err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
508 if (err) {
509 dev_err(priv->dev, "Unable to enable display: %d\n", err);
510 return err;
511 }
512
513 if (panel->backlight) {
514 /* Wait for the picture to be ready before enabling backlight */
515 msleep(msecs: 120);
516 }
517
518 return 0;
519}
520
521static int nv3052c_disable(struct drm_panel *panel)
522{
523 struct nv3052c *priv = to_nv3052c(panel);
524 struct mipi_dbi *dbi = &priv->dbi;
525 int err;
526
527 err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
528 if (err) {
529 dev_err(priv->dev, "Unable to disable display: %d\n", err);
530 return err;
531 }
532
533 return 0;
534}
535
536static int nv3052c_get_modes(struct drm_panel *panel,
537 struct drm_connector *connector)
538{
539 struct nv3052c *priv = to_nv3052c(panel);
540 const struct nv3052c_panel_info *panel_info = priv->panel_info;
541 struct drm_display_mode *mode;
542 unsigned int i;
543
544 for (i = 0; i < panel_info->num_modes; i++) {
545 mode = drm_mode_duplicate(dev: connector->dev,
546 mode: &panel_info->display_modes[i]);
547 if (!mode)
548 return -ENOMEM;
549
550 drm_mode_set_name(mode);
551
552 mode->type = DRM_MODE_TYPE_DRIVER;
553 if (panel_info->num_modes == 1)
554 mode->type |= DRM_MODE_TYPE_PREFERRED;
555
556 drm_mode_probed_add(connector, mode);
557 }
558
559 connector->display_info.bpc = 8;
560 connector->display_info.width_mm = panel_info->width_mm;
561 connector->display_info.height_mm = panel_info->height_mm;
562
563 drm_display_info_set_bus_formats(info: &connector->display_info,
564 formats: &panel_info->bus_format, num_formats: 1);
565 connector->display_info.bus_flags = panel_info->bus_flags;
566
567 return panel_info->num_modes;
568}
569
570static const struct drm_panel_funcs nv3052c_funcs = {
571 .prepare = nv3052c_prepare,
572 .unprepare = nv3052c_unprepare,
573 .enable = nv3052c_enable,
574 .disable = nv3052c_disable,
575 .get_modes = nv3052c_get_modes,
576};
577
578static int nv3052c_probe(struct spi_device *spi)
579{
580 struct device *dev = &spi->dev;
581 struct nv3052c *priv;
582 int err;
583
584 priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL);
585 if (!priv)
586 return -ENOMEM;
587
588 priv->dev = dev;
589
590 priv->panel_info = of_device_get_match_data(dev);
591 if (!priv->panel_info)
592 return -EINVAL;
593
594 priv->supply = devm_regulator_get(dev, id: "power");
595 if (IS_ERR(ptr: priv->supply))
596 return dev_err_probe(dev, err: PTR_ERR(ptr: priv->supply), fmt: "Failed to get power supply\n");
597
598 priv->reset_gpio = devm_gpiod_get(dev, con_id: "reset", flags: GPIOD_OUT_HIGH);
599 if (IS_ERR(ptr: priv->reset_gpio))
600 return dev_err_probe(dev, err: PTR_ERR(ptr: priv->reset_gpio), fmt: "Failed to get reset GPIO\n");
601
602 err = mipi_dbi_spi_init(spi, dbi: &priv->dbi, NULL);
603 if (err)
604 return dev_err_probe(dev, err, fmt: "MIPI DBI init failed\n");
605
606 priv->dbi.read_commands = NULL;
607
608 spi_set_drvdata(spi, data: priv);
609
610 drm_panel_init(panel: &priv->panel, dev, funcs: &nv3052c_funcs,
611 DRM_MODE_CONNECTOR_DPI);
612
613 err = drm_panel_of_backlight(panel: &priv->panel);
614 if (err)
615 return dev_err_probe(dev, err, fmt: "Failed to attach backlight\n");
616
617 drm_panel_add(panel: &priv->panel);
618
619 return 0;
620}
621
622static void nv3052c_remove(struct spi_device *spi)
623{
624 struct nv3052c *priv = spi_get_drvdata(spi);
625
626 drm_panel_remove(panel: &priv->panel);
627 drm_panel_disable(panel: &priv->panel);
628 drm_panel_unprepare(panel: &priv->panel);
629}
630
631static const struct drm_display_mode ltk035c5444t_modes[] = {
632 { /* 60 Hz */
633 .clock = 24000,
634 .hdisplay = 640,
635 .hsync_start = 640 + 96,
636 .hsync_end = 640 + 96 + 16,
637 .htotal = 640 + 96 + 16 + 48,
638 .vdisplay = 480,
639 .vsync_start = 480 + 5,
640 .vsync_end = 480 + 5 + 2,
641 .vtotal = 480 + 5 + 2 + 13,
642 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
643 },
644 { /* 50 Hz */
645 .clock = 18000,
646 .hdisplay = 640,
647 .hsync_start = 640 + 39,
648 .hsync_end = 640 + 39 + 2,
649 .htotal = 640 + 39 + 2 + 39,
650 .vdisplay = 480,
651 .vsync_start = 480 + 5,
652 .vsync_end = 480 + 5 + 2,
653 .vtotal = 480 + 5 + 2 + 13,
654 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
655 },
656};
657
658static const struct drm_display_mode fs035vg158_modes[] = {
659 { /* 60 Hz */
660 .clock = 21000,
661 .hdisplay = 640,
662 .hsync_start = 640 + 34,
663 .hsync_end = 640 + 34 + 4,
664 .htotal = 640 + 34 + 4 + 20,
665 .vdisplay = 480,
666 .vsync_start = 480 + 12,
667 .vsync_end = 480 + 12 + 4,
668 .vtotal = 480 + 12 + 4 + 6,
669 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
670 },
671};
672
673static const struct nv3052c_panel_info ltk035c5444t_panel_info = {
674 .display_modes = ltk035c5444t_modes,
675 .num_modes = ARRAY_SIZE(ltk035c5444t_modes),
676 .width_mm = 77,
677 .height_mm = 64,
678 .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
679 .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
680 .panel_regs = ltk035c5444t_panel_regs,
681 .panel_regs_len = ARRAY_SIZE(ltk035c5444t_panel_regs),
682};
683
684static const struct nv3052c_panel_info fs035vg158_panel_info = {
685 .display_modes = fs035vg158_modes,
686 .num_modes = ARRAY_SIZE(fs035vg158_modes),
687 .width_mm = 70,
688 .height_mm = 53,
689 .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
690 .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
691 .panel_regs = fs035vg158_panel_regs,
692 .panel_regs_len = ARRAY_SIZE(fs035vg158_panel_regs),
693};
694
695static const struct spi_device_id nv3052c_ids[] = {
696 { "ltk035c5444t", },
697 { "fs035vg158", },
698 { /* sentinel */ }
699};
700MODULE_DEVICE_TABLE(spi, nv3052c_ids);
701
702static const struct of_device_id nv3052c_of_match[] = {
703 { .compatible = "leadtek,ltk035c5444t", .data = &ltk035c5444t_panel_info },
704 { .compatible = "fascontek,fs035vg158", .data = &fs035vg158_panel_info },
705 { /* sentinel */ }
706};
707MODULE_DEVICE_TABLE(of, nv3052c_of_match);
708
709static struct spi_driver nv3052c_driver = {
710 .driver = {
711 .name = "nv3052c",
712 .of_match_table = nv3052c_of_match,
713 },
714 .id_table = nv3052c_ids,
715 .probe = nv3052c_probe,
716 .remove = nv3052c_remove,
717};
718module_spi_driver(nv3052c_driver);
719
720MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
721MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
722MODULE_LICENSE("GPL v2");
723

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source code of linux/drivers/gpu/drm/panel/panel-newvision-nv3052c.c