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