1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
4 */
5
6 #include <linux/delay.h>
7 #include <linux/gpio/consumer.h>
8 #include <linux/module.h>
9 #include <linux/of.h>
10 #include <linux/of_device.h>
11 #include <linux/regulator/consumer.h>
12
13 #include <video/mipi_display.h>
14
15 #include <drm/drm_crtc.h>
16 #include <drm/drm_device.h>
17 #include <drm/drm_mipi_dsi.h>
18 #include <drm/drm_modes.h>
19 #include <drm/drm_panel.h>
20
21 struct panel_init_cmd {
22 size_t len;
23 const char *data;
24 };
25
26 #define _INIT_CMD(...) { \
27 .len = sizeof((char[]){__VA_ARGS__}), \
28 .data = (char[]){__VA_ARGS__} }
29
30 struct panel_desc {
31 const struct drm_display_mode *mode;
32 unsigned int bpc;
33 struct {
34 unsigned int width;
35 unsigned int height;
36 } size;
37
38 unsigned long flags;
39 enum mipi_dsi_pixel_format format;
40 const struct panel_init_cmd *init_cmds;
41 unsigned int lanes;
42 const char * const *supply_names;
43 unsigned int num_supplies;
44 unsigned int sleep_mode_delay;
45 unsigned int power_down_delay;
46 };
47
48 struct innolux_panel {
49 struct drm_panel base;
50 struct mipi_dsi_device *link;
51 const struct panel_desc *desc;
52
53 struct regulator_bulk_data *supplies;
54 struct gpio_desc *enable_gpio;
55
56 bool prepared;
57 bool enabled;
58 };
59
to_innolux_panel(struct drm_panel * panel)60 static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
61 {
62 return container_of(panel, struct innolux_panel, base);
63 }
64
innolux_panel_disable(struct drm_panel * panel)65 static int innolux_panel_disable(struct drm_panel *panel)
66 {
67 struct innolux_panel *innolux = to_innolux_panel(panel);
68
69 if (!innolux->enabled)
70 return 0;
71
72 innolux->enabled = false;
73
74 return 0;
75 }
76
innolux_panel_unprepare(struct drm_panel * panel)77 static int innolux_panel_unprepare(struct drm_panel *panel)
78 {
79 struct innolux_panel *innolux = to_innolux_panel(panel);
80 int err;
81
82 if (!innolux->prepared)
83 return 0;
84
85 err = mipi_dsi_dcs_set_display_off(innolux->link);
86 if (err < 0)
87 dev_err(panel->dev, "failed to set display off: %d\n", err);
88
89 err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
90 if (err < 0) {
91 dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
92 return err;
93 }
94
95 if (innolux->desc->sleep_mode_delay)
96 msleep(innolux->desc->sleep_mode_delay);
97
98 gpiod_set_value_cansleep(innolux->enable_gpio, 0);
99
100 if (innolux->desc->power_down_delay)
101 msleep(innolux->desc->power_down_delay);
102
103 err = regulator_bulk_disable(innolux->desc->num_supplies,
104 innolux->supplies);
105 if (err < 0)
106 return err;
107
108 innolux->prepared = false;
109
110 return 0;
111 }
112
innolux_panel_prepare(struct drm_panel * panel)113 static int innolux_panel_prepare(struct drm_panel *panel)
114 {
115 struct innolux_panel *innolux = to_innolux_panel(panel);
116 int err;
117
118 if (innolux->prepared)
119 return 0;
120
121 gpiod_set_value_cansleep(innolux->enable_gpio, 0);
122
123 err = regulator_bulk_enable(innolux->desc->num_supplies,
124 innolux->supplies);
125 if (err < 0)
126 return err;
127
128 /* p079zca: t2 (20ms), p097pfg: t4 (15ms) */
129 usleep_range(20000, 21000);
130
131 gpiod_set_value_cansleep(innolux->enable_gpio, 1);
132
133 /* p079zca: t4, p097pfg: t5 */
134 usleep_range(20000, 21000);
135
136 if (innolux->desc->init_cmds) {
137 const struct panel_init_cmd *cmds =
138 innolux->desc->init_cmds;
139 unsigned int i;
140
141 for (i = 0; cmds[i].len != 0; i++) {
142 const struct panel_init_cmd *cmd = &cmds[i];
143
144 err = mipi_dsi_generic_write(innolux->link, cmd->data,
145 cmd->len);
146 if (err < 0) {
147 dev_err(panel->dev, "failed to write command %u\n", i);
148 goto poweroff;
149 }
150
151 /*
152 * Included by random guessing, because without this
153 * (or at least, some delay), the panel sometimes
154 * didn't appear to pick up the command sequence.
155 */
156 err = mipi_dsi_dcs_nop(innolux->link);
157 if (err < 0) {
158 dev_err(panel->dev, "failed to send DCS nop: %d\n", err);
159 goto poweroff;
160 }
161 }
162 }
163
164 err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
165 if (err < 0) {
166 dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
167 goto poweroff;
168 }
169
170 /* T6: 120ms - 1000ms*/
171 msleep(120);
172
173 err = mipi_dsi_dcs_set_display_on(innolux->link);
174 if (err < 0) {
175 dev_err(panel->dev, "failed to set display on: %d\n", err);
176 goto poweroff;
177 }
178
179 /* T7: 5ms */
180 usleep_range(5000, 6000);
181
182 innolux->prepared = true;
183
184 return 0;
185
186 poweroff:
187 gpiod_set_value_cansleep(innolux->enable_gpio, 0);
188 regulator_bulk_disable(innolux->desc->num_supplies, innolux->supplies);
189
190 return err;
191 }
192
innolux_panel_enable(struct drm_panel * panel)193 static int innolux_panel_enable(struct drm_panel *panel)
194 {
195 struct innolux_panel *innolux = to_innolux_panel(panel);
196
197 if (innolux->enabled)
198 return 0;
199
200 innolux->enabled = true;
201
202 return 0;
203 }
204
205 static const char * const innolux_p079zca_supply_names[] = {
206 "power",
207 };
208
209 static const struct drm_display_mode innolux_p079zca_mode = {
210 .clock = 56900,
211 .hdisplay = 768,
212 .hsync_start = 768 + 40,
213 .hsync_end = 768 + 40 + 40,
214 .htotal = 768 + 40 + 40 + 40,
215 .vdisplay = 1024,
216 .vsync_start = 1024 + 20,
217 .vsync_end = 1024 + 20 + 4,
218 .vtotal = 1024 + 20 + 4 + 20,
219 };
220
221 static const struct panel_desc innolux_p079zca_panel_desc = {
222 .mode = &innolux_p079zca_mode,
223 .bpc = 8,
224 .size = {
225 .width = 120,
226 .height = 160,
227 },
228 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
229 MIPI_DSI_MODE_LPM,
230 .format = MIPI_DSI_FMT_RGB888,
231 .lanes = 4,
232 .supply_names = innolux_p079zca_supply_names,
233 .num_supplies = ARRAY_SIZE(innolux_p079zca_supply_names),
234 .power_down_delay = 80, /* T8: 80ms - 1000ms */
235 };
236
237 static const char * const innolux_p097pfg_supply_names[] = {
238 "avdd",
239 "avee",
240 };
241
242 static const struct drm_display_mode innolux_p097pfg_mode = {
243 .clock = 229000,
244 .hdisplay = 1536,
245 .hsync_start = 1536 + 100,
246 .hsync_end = 1536 + 100 + 24,
247 .htotal = 1536 + 100 + 24 + 100,
248 .vdisplay = 2048,
249 .vsync_start = 2048 + 100,
250 .vsync_end = 2048 + 100 + 2,
251 .vtotal = 2048 + 100 + 2 + 18,
252 };
253
254 /*
255 * Display manufacturer failed to provide init sequencing according to
256 * https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/892065/
257 * so the init sequence stems from a register dump of a working panel.
258 */
259 static const struct panel_init_cmd innolux_p097pfg_init_cmds[] = {
260 /* page 0 */
261 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x00),
262 _INIT_CMD(0xB1, 0xE8, 0x11),
263 _INIT_CMD(0xB2, 0x25, 0x02),
264 _INIT_CMD(0xB5, 0x08, 0x00),
265 _INIT_CMD(0xBC, 0x0F, 0x00),
266 _INIT_CMD(0xB8, 0x03, 0x06, 0x00, 0x00),
267 _INIT_CMD(0xBD, 0x01, 0x90, 0x14, 0x14),
268 _INIT_CMD(0x6F, 0x01),
269 _INIT_CMD(0xC0, 0x03),
270 _INIT_CMD(0x6F, 0x02),
271 _INIT_CMD(0xC1, 0x0D),
272 _INIT_CMD(0xD9, 0x01, 0x09, 0x70),
273 _INIT_CMD(0xC5, 0x12, 0x21, 0x00),
274 _INIT_CMD(0xBB, 0x93, 0x93),
275
276 /* page 1 */
277 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x01),
278 _INIT_CMD(0xB3, 0x3C, 0x3C),
279 _INIT_CMD(0xB4, 0x0F, 0x0F),
280 _INIT_CMD(0xB9, 0x45, 0x45),
281 _INIT_CMD(0xBA, 0x14, 0x14),
282 _INIT_CMD(0xCA, 0x02),
283 _INIT_CMD(0xCE, 0x04),
284 _INIT_CMD(0xC3, 0x9B, 0x9B),
285 _INIT_CMD(0xD8, 0xC0, 0x03),
286 _INIT_CMD(0xBC, 0x82, 0x01),
287 _INIT_CMD(0xBD, 0x9E, 0x01),
288
289 /* page 2 */
290 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x02),
291 _INIT_CMD(0xB0, 0x82),
292 _INIT_CMD(0xD1, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x82, 0x00, 0xA5,
293 0x00, 0xC1, 0x00, 0xEA, 0x01, 0x0D, 0x01, 0x40),
294 _INIT_CMD(0xD2, 0x01, 0x6A, 0x01, 0xA8, 0x01, 0xDC, 0x02, 0x29,
295 0x02, 0x67, 0x02, 0x68, 0x02, 0xA8, 0x02, 0xF0),
296 _INIT_CMD(0xD3, 0x03, 0x19, 0x03, 0x49, 0x03, 0x67, 0x03, 0x8C,
297 0x03, 0xA6, 0x03, 0xC7, 0x03, 0xDE, 0x03, 0xEC),
298 _INIT_CMD(0xD4, 0x03, 0xFF, 0x03, 0xFF),
299 _INIT_CMD(0xE0, 0x00, 0x00, 0x00, 0x86, 0x00, 0xC5, 0x00, 0xE5,
300 0x00, 0xFF, 0x01, 0x26, 0x01, 0x45, 0x01, 0x75),
301 _INIT_CMD(0xE1, 0x01, 0x9C, 0x01, 0xD5, 0x02, 0x05, 0x02, 0x4D,
302 0x02, 0x86, 0x02, 0x87, 0x02, 0xC3, 0x03, 0x03),
303 _INIT_CMD(0xE2, 0x03, 0x2A, 0x03, 0x56, 0x03, 0x72, 0x03, 0x94,
304 0x03, 0xAC, 0x03, 0xCB, 0x03, 0xE0, 0x03, 0xED),
305 _INIT_CMD(0xE3, 0x03, 0xFF, 0x03, 0xFF),
306
307 /* page 3 */
308 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x03),
309 _INIT_CMD(0xB0, 0x00, 0x00, 0x00, 0x00),
310 _INIT_CMD(0xB1, 0x00, 0x00, 0x00, 0x00),
311 _INIT_CMD(0xB2, 0x00, 0x00, 0x06, 0x04, 0x01, 0x40, 0x85),
312 _INIT_CMD(0xB3, 0x10, 0x07, 0xFC, 0x04, 0x01, 0x40, 0x80),
313 _INIT_CMD(0xB6, 0xF0, 0x08, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01,
314 0x40, 0x80),
315 _INIT_CMD(0xBA, 0xC5, 0x07, 0x00, 0x04, 0x11, 0x25, 0x8C),
316 _INIT_CMD(0xBB, 0xC5, 0x07, 0x00, 0x03, 0x11, 0x25, 0x8C),
317 _INIT_CMD(0xC0, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80),
318 _INIT_CMD(0xC1, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80),
319 _INIT_CMD(0xC4, 0x00, 0x00),
320 _INIT_CMD(0xEF, 0x41),
321
322 /* page 4 */
323 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x04),
324 _INIT_CMD(0xEC, 0x4C),
325
326 /* page 5 */
327 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x05),
328 _INIT_CMD(0xB0, 0x13, 0x03, 0x03, 0x01),
329 _INIT_CMD(0xB1, 0x30, 0x00),
330 _INIT_CMD(0xB2, 0x02, 0x02, 0x00),
331 _INIT_CMD(0xB3, 0x82, 0x23, 0x82, 0x9D),
332 _INIT_CMD(0xB4, 0xC5, 0x75, 0x24, 0x57),
333 _INIT_CMD(0xB5, 0x00, 0xD4, 0x72, 0x11, 0x11, 0xAB, 0x0A),
334 _INIT_CMD(0xB6, 0x00, 0x00, 0xD5, 0x72, 0x24, 0x56),
335 _INIT_CMD(0xB7, 0x5C, 0xDC, 0x5C, 0x5C),
336 _INIT_CMD(0xB9, 0x0C, 0x00, 0x00, 0x01, 0x00),
337 _INIT_CMD(0xC0, 0x75, 0x11, 0x11, 0x54, 0x05),
338 _INIT_CMD(0xC6, 0x00, 0x00, 0x00, 0x00),
339 _INIT_CMD(0xD0, 0x00, 0x48, 0x08, 0x00, 0x00),
340 _INIT_CMD(0xD1, 0x00, 0x48, 0x09, 0x00, 0x00),
341
342 /* page 6 */
343 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x06),
344 _INIT_CMD(0xB0, 0x02, 0x32, 0x32, 0x08, 0x2F),
345 _INIT_CMD(0xB1, 0x2E, 0x15, 0x14, 0x13, 0x12),
346 _INIT_CMD(0xB2, 0x11, 0x10, 0x00, 0x3D, 0x3D),
347 _INIT_CMD(0xB3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
348 _INIT_CMD(0xB4, 0x3D, 0x32),
349 _INIT_CMD(0xB5, 0x03, 0x32, 0x32, 0x09, 0x2F),
350 _INIT_CMD(0xB6, 0x2E, 0x1B, 0x1A, 0x19, 0x18),
351 _INIT_CMD(0xB7, 0x17, 0x16, 0x01, 0x3D, 0x3D),
352 _INIT_CMD(0xB8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
353 _INIT_CMD(0xB9, 0x3D, 0x32),
354 _INIT_CMD(0xC0, 0x01, 0x32, 0x32, 0x09, 0x2F),
355 _INIT_CMD(0xC1, 0x2E, 0x1A, 0x1B, 0x16, 0x17),
356 _INIT_CMD(0xC2, 0x18, 0x19, 0x03, 0x3D, 0x3D),
357 _INIT_CMD(0xC3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
358 _INIT_CMD(0xC4, 0x3D, 0x32),
359 _INIT_CMD(0xC5, 0x00, 0x32, 0x32, 0x08, 0x2F),
360 _INIT_CMD(0xC6, 0x2E, 0x14, 0x15, 0x10, 0x11),
361 _INIT_CMD(0xC7, 0x12, 0x13, 0x02, 0x3D, 0x3D),
362 _INIT_CMD(0xC8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
363 _INIT_CMD(0xC9, 0x3D, 0x32),
364
365 {},
366 };
367
368 static const struct panel_desc innolux_p097pfg_panel_desc = {
369 .mode = &innolux_p097pfg_mode,
370 .bpc = 8,
371 .size = {
372 .width = 147,
373 .height = 196,
374 },
375 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
376 MIPI_DSI_MODE_LPM,
377 .format = MIPI_DSI_FMT_RGB888,
378 .init_cmds = innolux_p097pfg_init_cmds,
379 .lanes = 4,
380 .supply_names = innolux_p097pfg_supply_names,
381 .num_supplies = ARRAY_SIZE(innolux_p097pfg_supply_names),
382 .sleep_mode_delay = 100, /* T15 */
383 };
384
innolux_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)385 static int innolux_panel_get_modes(struct drm_panel *panel,
386 struct drm_connector *connector)
387 {
388 struct innolux_panel *innolux = to_innolux_panel(panel);
389 const struct drm_display_mode *m = innolux->desc->mode;
390 struct drm_display_mode *mode;
391
392 mode = drm_mode_duplicate(connector->dev, m);
393 if (!mode) {
394 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
395 m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
396 return -ENOMEM;
397 }
398
399 drm_mode_set_name(mode);
400
401 drm_mode_probed_add(connector, mode);
402
403 connector->display_info.width_mm = innolux->desc->size.width;
404 connector->display_info.height_mm = innolux->desc->size.height;
405 connector->display_info.bpc = innolux->desc->bpc;
406
407 return 1;
408 }
409
410 static const struct drm_panel_funcs innolux_panel_funcs = {
411 .disable = innolux_panel_disable,
412 .unprepare = innolux_panel_unprepare,
413 .prepare = innolux_panel_prepare,
414 .enable = innolux_panel_enable,
415 .get_modes = innolux_panel_get_modes,
416 };
417
418 static const struct of_device_id innolux_of_match[] = {
419 { .compatible = "innolux,p079zca",
420 .data = &innolux_p079zca_panel_desc
421 },
422 { .compatible = "innolux,p097pfg",
423 .data = &innolux_p097pfg_panel_desc
424 },
425 { }
426 };
427 MODULE_DEVICE_TABLE(of, innolux_of_match);
428
innolux_panel_add(struct mipi_dsi_device * dsi,const struct panel_desc * desc)429 static int innolux_panel_add(struct mipi_dsi_device *dsi,
430 const struct panel_desc *desc)
431 {
432 struct innolux_panel *innolux;
433 struct device *dev = &dsi->dev;
434 int err, i;
435
436 innolux = devm_kzalloc(dev, sizeof(*innolux), GFP_KERNEL);
437 if (!innolux)
438 return -ENOMEM;
439
440 innolux->desc = desc;
441
442 innolux->supplies = devm_kcalloc(dev, desc->num_supplies,
443 sizeof(*innolux->supplies),
444 GFP_KERNEL);
445 if (!innolux->supplies)
446 return -ENOMEM;
447
448 for (i = 0; i < desc->num_supplies; i++)
449 innolux->supplies[i].supply = desc->supply_names[i];
450
451 err = devm_regulator_bulk_get(dev, desc->num_supplies,
452 innolux->supplies);
453 if (err < 0)
454 return err;
455
456 innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
457 GPIOD_OUT_HIGH);
458 if (IS_ERR(innolux->enable_gpio)) {
459 err = PTR_ERR(innolux->enable_gpio);
460 dev_dbg(dev, "failed to get enable gpio: %d\n", err);
461 innolux->enable_gpio = NULL;
462 }
463
464 drm_panel_init(&innolux->base, dev, &innolux_panel_funcs,
465 DRM_MODE_CONNECTOR_DSI);
466
467 err = drm_panel_of_backlight(&innolux->base);
468 if (err)
469 return err;
470
471 drm_panel_add(&innolux->base);
472
473 mipi_dsi_set_drvdata(dsi, innolux);
474 innolux->link = dsi;
475
476 return 0;
477 }
478
innolux_panel_del(struct innolux_panel * innolux)479 static void innolux_panel_del(struct innolux_panel *innolux)
480 {
481 drm_panel_remove(&innolux->base);
482 }
483
innolux_panel_probe(struct mipi_dsi_device * dsi)484 static int innolux_panel_probe(struct mipi_dsi_device *dsi)
485 {
486 const struct panel_desc *desc;
487 struct innolux_panel *innolux;
488 int err;
489
490 desc = of_device_get_match_data(&dsi->dev);
491 dsi->mode_flags = desc->flags;
492 dsi->format = desc->format;
493 dsi->lanes = desc->lanes;
494
495 err = innolux_panel_add(dsi, desc);
496 if (err < 0)
497 return err;
498
499 err = mipi_dsi_attach(dsi);
500 if (err < 0) {
501 innolux = mipi_dsi_get_drvdata(dsi);
502 innolux_panel_del(innolux);
503 return err;
504 }
505
506 return 0;
507 }
508
innolux_panel_remove(struct mipi_dsi_device * dsi)509 static int innolux_panel_remove(struct mipi_dsi_device *dsi)
510 {
511 struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
512 int err;
513
514 err = drm_panel_unprepare(&innolux->base);
515 if (err < 0)
516 dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err);
517
518 err = drm_panel_disable(&innolux->base);
519 if (err < 0)
520 dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
521
522 err = mipi_dsi_detach(dsi);
523 if (err < 0)
524 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
525
526 innolux_panel_del(innolux);
527
528 return 0;
529 }
530
innolux_panel_shutdown(struct mipi_dsi_device * dsi)531 static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
532 {
533 struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
534
535 drm_panel_unprepare(&innolux->base);
536 drm_panel_disable(&innolux->base);
537 }
538
539 static struct mipi_dsi_driver innolux_panel_driver = {
540 .driver = {
541 .name = "panel-innolux-p079zca",
542 .of_match_table = innolux_of_match,
543 },
544 .probe = innolux_panel_probe,
545 .remove = innolux_panel_remove,
546 .shutdown = innolux_panel_shutdown,
547 };
548 module_mipi_dsi_driver(innolux_panel_driver);
549
550 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
551 MODULE_AUTHOR("Lin Huang <hl@rock-chips.com>");
552 MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
553 MODULE_LICENSE("GPL v2");
554