1
2
3
4
5
6#include <linux/backlight.h>
7#include <linux/delay.h>
8#include <linux/gpio/consumer.h>
9#include <linux/module.h>
10#include <linux/of_device.h>
11#include <linux/of_graph.h>
12#include <linux/pinctrl/consumer.h>
13#include <linux/regulator/consumer.h>
14
15#include <video/mipi_display.h>
16
17#include <drm/drm_mipi_dsi.h>
18#include <drm/drm_modes.h>
19#include <drm/drm_panel.h>
20#include <drm/drm_print.h>
21
22static const char * const regulator_names[] = {
23 "vdda",
24 "vdispp",
25 "vdispn",
26};
27
28static unsigned long const regulator_enable_loads[] = {
29 62000,
30 100000,
31 100000,
32};
33
34static unsigned long const regulator_disable_loads[] = {
35 80,
36 100,
37 100,
38};
39
40struct cmd_set {
41 u8 commands[4];
42 u8 size;
43};
44
45struct nt35597_config {
46 u32 width_mm;
47 u32 height_mm;
48 const char *panel_name;
49 const struct cmd_set *panel_on_cmds;
50 u32 num_on_cmds;
51 const struct drm_display_mode *dm;
52};
53
54struct truly_nt35597 {
55 struct device *dev;
56 struct drm_panel panel;
57
58 struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
59
60 struct gpio_desc *reset_gpio;
61 struct gpio_desc *mode_gpio;
62
63 struct backlight_device *backlight;
64
65 struct mipi_dsi_device *dsi[2];
66
67 const struct nt35597_config *config;
68 bool prepared;
69 bool enabled;
70};
71
72static inline struct truly_nt35597 *panel_to_ctx(struct drm_panel *panel)
73{
74 return container_of(panel, struct truly_nt35597, panel);
75}
76
77static const struct cmd_set qcom_2k_panel_magic_cmds[] = {
78
79 { { 0xff, 0x20 }, 2 },
80 { { 0xfb, 0x01 }, 2 },
81 { { 0x00, 0x01 }, 2 },
82 { { 0x01, 0x55 }, 2 },
83 { { 0x02, 0x45 }, 2 },
84 { { 0x05, 0x40 }, 2 },
85 { { 0x06, 0x19 }, 2 },
86 { { 0x07, 0x1e }, 2 },
87 { { 0x0b, 0x73 }, 2 },
88 { { 0x0c, 0x73 }, 2 },
89 { { 0x0e, 0xb0 }, 2 },
90 { { 0x0f, 0xae }, 2 },
91 { { 0x11, 0xb8 }, 2 },
92 { { 0x13, 0x00 }, 2 },
93 { { 0x58, 0x80 }, 2 },
94 { { 0x59, 0x01 }, 2 },
95 { { 0x5a, 0x00 }, 2 },
96 { { 0x5b, 0x01 }, 2 },
97 { { 0x5c, 0x80 }, 2 },
98 { { 0x5d, 0x81 }, 2 },
99 { { 0x5e, 0x00 }, 2 },
100 { { 0x5f, 0x01 }, 2 },
101 { { 0x72, 0x11 }, 2 },
102 { { 0x68, 0x03 }, 2 },
103
104 { { 0xFF, 0x24 }, 2 },
105 { { 0xFB, 0x01 }, 2 },
106 { { 0x00, 0x1C }, 2 },
107 { { 0x01, 0x0B }, 2 },
108 { { 0x02, 0x0C }, 2 },
109 { { 0x03, 0x01 }, 2 },
110 { { 0x04, 0x0F }, 2 },
111 { { 0x05, 0x10 }, 2 },
112 { { 0x06, 0x10 }, 2 },
113 { { 0x07, 0x10 }, 2 },
114 { { 0x08, 0x89 }, 2 },
115 { { 0x09, 0x8A }, 2 },
116 { { 0x0A, 0x13 }, 2 },
117 { { 0x0B, 0x13 }, 2 },
118 { { 0x0C, 0x15 }, 2 },
119 { { 0x0D, 0x15 }, 2 },
120 { { 0x0E, 0x17 }, 2 },
121 { { 0x0F, 0x17 }, 2 },
122 { { 0x10, 0x1C }, 2 },
123 { { 0x11, 0x0B }, 2 },
124 { { 0x12, 0x0C }, 2 },
125 { { 0x13, 0x01 }, 2 },
126 { { 0x14, 0x0F }, 2 },
127 { { 0x15, 0x10 }, 2 },
128 { { 0x16, 0x10 }, 2 },
129 { { 0x17, 0x10 }, 2 },
130 { { 0x18, 0x89 }, 2 },
131 { { 0x19, 0x8A }, 2 },
132 { { 0x1A, 0x13 }, 2 },
133 { { 0x1B, 0x13 }, 2 },
134 { { 0x1C, 0x15 }, 2 },
135 { { 0x1D, 0x15 }, 2 },
136 { { 0x1E, 0x17 }, 2 },
137 { { 0x1F, 0x17 }, 2 },
138
139 { { 0x20, 0x40 }, 2 },
140 { { 0x21, 0x01 }, 2 },
141 { { 0x22, 0x00 }, 2 },
142 { { 0x23, 0x40 }, 2 },
143 { { 0x24, 0x40 }, 2 },
144 { { 0x25, 0x6D }, 2 },
145 { { 0x26, 0x40 }, 2 },
146 { { 0x27, 0x40 }, 2 },
147
148 { { 0xE0, 0x00 }, 2 },
149 { { 0xDC, 0x21 }, 2 },
150 { { 0xDD, 0x22 }, 2 },
151 { { 0xDE, 0x07 }, 2 },
152 { { 0xDF, 0x07 }, 2 },
153 { { 0xE3, 0x6D }, 2 },
154 { { 0xE1, 0x07 }, 2 },
155 { { 0xE2, 0x07 }, 2 },
156
157 { { 0x29, 0xD8 }, 2 },
158 { { 0x2A, 0x2A }, 2 },
159
160 { { 0x4B, 0x03 }, 2 },
161 { { 0x4C, 0x11 }, 2 },
162 { { 0x4D, 0x10 }, 2 },
163 { { 0x4E, 0x01 }, 2 },
164 { { 0x4F, 0x01 }, 2 },
165 { { 0x50, 0x10 }, 2 },
166 { { 0x51, 0x00 }, 2 },
167 { { 0x52, 0x80 }, 2 },
168 { { 0x53, 0x00 }, 2 },
169 { { 0x56, 0x00 }, 2 },
170 { { 0x54, 0x07 }, 2 },
171 { { 0x58, 0x07 }, 2 },
172 { { 0x55, 0x25 }, 2 },
173
174 { { 0x5B, 0x43 }, 2 },
175 { { 0x5C, 0x00 }, 2 },
176 { { 0x5F, 0x73 }, 2 },
177 { { 0x60, 0x73 }, 2 },
178 { { 0x63, 0x22 }, 2 },
179 { { 0x64, 0x00 }, 2 },
180 { { 0x67, 0x08 }, 2 },
181 { { 0x68, 0x04 }, 2 },
182
183 { { 0x72, 0x02 }, 2 },
184
185 { { 0x7A, 0x80 }, 2 },
186 { { 0x7B, 0x91 }, 2 },
187 { { 0x7C, 0xD8 }, 2 },
188 { { 0x7D, 0x60 }, 2 },
189 { { 0x7F, 0x15 }, 2 },
190 { { 0x75, 0x15 }, 2 },
191
192 { { 0xB3, 0xC0 }, 2 },
193 { { 0xB4, 0x00 }, 2 },
194 { { 0xB5, 0x00 }, 2 },
195
196 { { 0x78, 0x00 }, 2 },
197 { { 0x79, 0x00 }, 2 },
198 { { 0x80, 0x00 }, 2 },
199 { { 0x83, 0x00 }, 2 },
200
201 { { 0x93, 0x0A }, 2 },
202 { { 0x94, 0x0A }, 2 },
203
204 { { 0x8A, 0x00 }, 2 },
205 { { 0x9B, 0xFF }, 2 },
206
207 { { 0x9D, 0xB0 }, 2 },
208 { { 0x9F, 0x63 }, 2 },
209 { { 0x98, 0x10 }, 2 },
210
211 { { 0xEC, 0x00 }, 2 },
212
213 { { 0xFF, 0x10 }, 2 },
214
215 { { 0x3B, 0x03, 0x0A, 0x0A }, 4 },
216
217 { { 0x35, 0x00 }, 2 },
218
219 { { 0xE5, 0x01 }, 2 },
220
221 { { 0xBB, 0x03 }, 2 },
222
223 { { 0xFB, 0x01 }, 2 },
224};
225
226static int truly_dcs_write(struct drm_panel *panel, u32 command)
227{
228 struct truly_nt35597 *ctx = panel_to_ctx(panel);
229 int i, ret;
230
231 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
232 ret = mipi_dsi_dcs_write(ctx->dsi[i], command, NULL, 0);
233 if (ret < 0) {
234 DRM_DEV_ERROR(ctx->dev,
235 "cmd 0x%x failed for dsi = %d\n",
236 command, i);
237 }
238 }
239
240 return ret;
241}
242
243static int truly_dcs_write_buf(struct drm_panel *panel,
244 u32 size, const u8 *buf)
245{
246 struct truly_nt35597 *ctx = panel_to_ctx(panel);
247 int ret = 0;
248 int i;
249
250 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
251 ret = mipi_dsi_dcs_write_buffer(ctx->dsi[i], buf, size);
252 if (ret < 0) {
253 DRM_DEV_ERROR(ctx->dev,
254 "failed to tx cmd [%d], err: %d\n", i, ret);
255 return ret;
256 }
257 }
258
259 return ret;
260}
261
262static int truly_35597_power_on(struct truly_nt35597 *ctx)
263{
264 int ret, i;
265
266 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
267 ret = regulator_set_load(ctx->supplies[i].consumer,
268 regulator_enable_loads[i]);
269 if (ret)
270 return ret;
271 }
272
273 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
274 if (ret < 0)
275 return ret;
276
277
278
279
280
281
282 gpiod_set_value(ctx->reset_gpio, 0);
283 usleep_range(10000, 20000);
284 gpiod_set_value(ctx->reset_gpio, 1);
285 usleep_range(10000, 20000);
286 gpiod_set_value(ctx->reset_gpio, 0);
287 usleep_range(10000, 20000);
288
289 return 0;
290}
291
292static int truly_nt35597_power_off(struct truly_nt35597 *ctx)
293{
294 int ret = 0;
295 int i;
296
297 gpiod_set_value(ctx->reset_gpio, 1);
298
299 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
300 ret = regulator_set_load(ctx->supplies[i].consumer,
301 regulator_disable_loads[i]);
302 if (ret) {
303 DRM_DEV_ERROR(ctx->dev,
304 "regulator_set_load failed %d\n", ret);
305 return ret;
306 }
307 }
308
309 ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
310 if (ret) {
311 DRM_DEV_ERROR(ctx->dev,
312 "regulator_bulk_disable failed %d\n", ret);
313 }
314 return ret;
315}
316
317static int truly_nt35597_disable(struct drm_panel *panel)
318{
319 struct truly_nt35597 *ctx = panel_to_ctx(panel);
320 int ret;
321
322 if (!ctx->enabled)
323 return 0;
324
325 if (ctx->backlight) {
326 ret = backlight_disable(ctx->backlight);
327 if (ret < 0)
328 DRM_DEV_ERROR(ctx->dev, "backlight disable failed %d\n",
329 ret);
330 }
331
332 ctx->enabled = false;
333 return 0;
334}
335
336static int truly_nt35597_unprepare(struct drm_panel *panel)
337{
338 struct truly_nt35597 *ctx = panel_to_ctx(panel);
339 int ret = 0;
340
341 if (!ctx->prepared)
342 return 0;
343
344 ctx->dsi[0]->mode_flags = 0;
345 ctx->dsi[1]->mode_flags = 0;
346
347 ret = truly_dcs_write(panel, MIPI_DCS_SET_DISPLAY_OFF);
348 if (ret < 0) {
349 DRM_DEV_ERROR(ctx->dev,
350 "set_display_off cmd failed ret = %d\n",
351 ret);
352 }
353
354
355 msleep(120);
356
357 ret = truly_dcs_write(panel, MIPI_DCS_ENTER_SLEEP_MODE);
358 if (ret < 0) {
359 DRM_DEV_ERROR(ctx->dev,
360 "enter_sleep cmd failed ret = %d\n", ret);
361 }
362
363 ret = truly_nt35597_power_off(ctx);
364 if (ret < 0)
365 DRM_DEV_ERROR(ctx->dev, "power_off failed ret = %d\n", ret);
366
367 ctx->prepared = false;
368 return ret;
369}
370
371static int truly_nt35597_prepare(struct drm_panel *panel)
372{
373 struct truly_nt35597 *ctx = panel_to_ctx(panel);
374 int ret;
375 int i;
376 const struct cmd_set *panel_on_cmds;
377 const struct nt35597_config *config;
378 u32 num_cmds;
379
380 if (ctx->prepared)
381 return 0;
382
383 ret = truly_35597_power_on(ctx);
384 if (ret < 0)
385 return ret;
386
387 ctx->dsi[0]->mode_flags |= MIPI_DSI_MODE_LPM;
388 ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;
389
390 config = ctx->config;
391 panel_on_cmds = config->panel_on_cmds;
392 num_cmds = config->num_on_cmds;
393
394 for (i = 0; i < num_cmds; i++) {
395 ret = truly_dcs_write_buf(panel,
396 panel_on_cmds[i].size,
397 panel_on_cmds[i].commands);
398 if (ret < 0) {
399 DRM_DEV_ERROR(ctx->dev,
400 "cmd set tx failed i = %d ret = %d\n",
401 i, ret);
402 goto power_off;
403 }
404 }
405
406 ret = truly_dcs_write(panel, MIPI_DCS_EXIT_SLEEP_MODE);
407 if (ret < 0) {
408 DRM_DEV_ERROR(ctx->dev,
409 "exit_sleep_mode cmd failed ret = %d\n",
410 ret);
411 goto power_off;
412 }
413
414
415 msleep(120);
416
417 ret = truly_dcs_write(panel, MIPI_DCS_SET_DISPLAY_ON);
418 if (ret < 0) {
419 DRM_DEV_ERROR(ctx->dev,
420 "set_display_on cmd failed ret = %d\n", ret);
421 goto power_off;
422 }
423
424
425 msleep(120);
426
427 ctx->prepared = true;
428
429 return 0;
430
431power_off:
432 if (truly_nt35597_power_off(ctx))
433 DRM_DEV_ERROR(ctx->dev, "power_off failed\n");
434 return ret;
435}
436
437static int truly_nt35597_enable(struct drm_panel *panel)
438{
439 struct truly_nt35597 *ctx = panel_to_ctx(panel);
440 int ret;
441
442 if (ctx->enabled)
443 return 0;
444
445 if (ctx->backlight) {
446 ret = backlight_enable(ctx->backlight);
447 if (ret < 0)
448 DRM_DEV_ERROR(ctx->dev, "backlight enable failed %d\n",
449 ret);
450 }
451
452 ctx->enabled = true;
453
454 return 0;
455}
456
457static int truly_nt35597_get_modes(struct drm_panel *panel,
458 struct drm_connector *connector)
459{
460 struct truly_nt35597 *ctx = panel_to_ctx(panel);
461 struct drm_display_mode *mode;
462 const struct nt35597_config *config;
463
464 config = ctx->config;
465 mode = drm_mode_create(connector->dev);
466 if (!mode) {
467 DRM_DEV_ERROR(ctx->dev,
468 "failed to create a new display mode\n");
469 return 0;
470 }
471
472 connector->display_info.width_mm = config->width_mm;
473 connector->display_info.height_mm = config->height_mm;
474 drm_mode_copy(mode, config->dm);
475 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
476 drm_mode_probed_add(connector, mode);
477
478 return 1;
479}
480
481static const struct drm_panel_funcs truly_nt35597_drm_funcs = {
482 .disable = truly_nt35597_disable,
483 .unprepare = truly_nt35597_unprepare,
484 .prepare = truly_nt35597_prepare,
485 .enable = truly_nt35597_enable,
486 .get_modes = truly_nt35597_get_modes,
487};
488
489static int truly_nt35597_panel_add(struct truly_nt35597 *ctx)
490{
491 struct device *dev = ctx->dev;
492 int ret, i;
493 const struct nt35597_config *config;
494
495 config = ctx->config;
496 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++)
497 ctx->supplies[i].supply = regulator_names[i];
498
499 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
500 ctx->supplies);
501 if (ret < 0)
502 return ret;
503
504 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
505 if (IS_ERR(ctx->reset_gpio)) {
506 DRM_DEV_ERROR(dev, "cannot get reset gpio %ld\n",
507 PTR_ERR(ctx->reset_gpio));
508 return PTR_ERR(ctx->reset_gpio);
509 }
510
511 ctx->mode_gpio = devm_gpiod_get(dev, "mode", GPIOD_OUT_LOW);
512 if (IS_ERR(ctx->mode_gpio)) {
513 DRM_DEV_ERROR(dev, "cannot get mode gpio %ld\n",
514 PTR_ERR(ctx->mode_gpio));
515 return PTR_ERR(ctx->mode_gpio);
516 }
517
518
519 gpiod_set_value(ctx->mode_gpio, 0);
520
521 drm_panel_init(&ctx->panel, dev, &truly_nt35597_drm_funcs,
522 DRM_MODE_CONNECTOR_DSI);
523 drm_panel_add(&ctx->panel);
524
525 return 0;
526}
527
528static const struct drm_display_mode qcom_sdm845_mtp_2k_mode = {
529 .name = "1440x2560",
530 .clock = 268316,
531 .hdisplay = 1440,
532 .hsync_start = 1440 + 200,
533 .hsync_end = 1440 + 200 + 32,
534 .htotal = 1440 + 200 + 32 + 64,
535 .vdisplay = 2560,
536 .vsync_start = 2560 + 8,
537 .vsync_end = 2560 + 8 + 1,
538 .vtotal = 2560 + 8 + 1 + 7,
539 .vrefresh = 60,
540 .flags = 0,
541};
542
543static const struct nt35597_config nt35597_dir = {
544 .width_mm = 74,
545 .height_mm = 131,
546 .panel_name = "qcom_sdm845_mtp_2k_panel",
547 .dm = &qcom_sdm845_mtp_2k_mode,
548 .panel_on_cmds = qcom_2k_panel_magic_cmds,
549 .num_on_cmds = ARRAY_SIZE(qcom_2k_panel_magic_cmds),
550};
551
552static int truly_nt35597_probe(struct mipi_dsi_device *dsi)
553{
554 struct device *dev = &dsi->dev;
555 struct truly_nt35597 *ctx;
556 struct mipi_dsi_device *dsi1_device;
557 struct device_node *dsi1;
558 struct mipi_dsi_host *dsi1_host;
559 struct mipi_dsi_device *dsi_dev;
560 int ret = 0;
561 int i;
562
563 const struct mipi_dsi_device_info info = {
564 .type = "trulynt35597",
565 .channel = 0,
566 .node = NULL,
567 };
568
569 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
570
571 if (!ctx)
572 return -ENOMEM;
573
574
575
576
577
578
579
580
581 ctx->config = of_device_get_match_data(dev);
582
583 if (!ctx->config) {
584 dev_err(dev, "missing device configuration\n");
585 return -ENODEV;
586 }
587
588 dsi1 = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
589 if (!dsi1) {
590 DRM_DEV_ERROR(dev,
591 "failed to get remote node for dsi1_device\n");
592 return -ENODEV;
593 }
594
595 dsi1_host = of_find_mipi_dsi_host_by_node(dsi1);
596 of_node_put(dsi1);
597 if (!dsi1_host) {
598 DRM_DEV_ERROR(dev, "failed to find dsi host\n");
599 return -EPROBE_DEFER;
600 }
601
602
603 dsi1_device = mipi_dsi_device_register_full(dsi1_host, &info);
604 if (IS_ERR(dsi1_device)) {
605 DRM_DEV_ERROR(dev, "failed to create dsi device\n");
606 return PTR_ERR(dsi1_device);
607 }
608
609 mipi_dsi_set_drvdata(dsi, ctx);
610
611 ctx->dev = dev;
612 ctx->dsi[0] = dsi;
613 ctx->dsi[1] = dsi1_device;
614
615 ret = truly_nt35597_panel_add(ctx);
616 if (ret) {
617 DRM_DEV_ERROR(dev, "failed to add panel\n");
618 goto err_panel_add;
619 }
620
621 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
622 dsi_dev = ctx->dsi[i];
623 dsi_dev->lanes = 4;
624 dsi_dev->format = MIPI_DSI_FMT_RGB888;
625 dsi_dev->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
626 MIPI_DSI_CLOCK_NON_CONTINUOUS;
627 ret = mipi_dsi_attach(dsi_dev);
628 if (ret < 0) {
629 DRM_DEV_ERROR(dev,
630 "dsi attach failed i = %d\n", i);
631 goto err_dsi_attach;
632 }
633 }
634
635 return 0;
636
637err_dsi_attach:
638 drm_panel_remove(&ctx->panel);
639err_panel_add:
640 mipi_dsi_device_unregister(dsi1_device);
641 return ret;
642}
643
644static int truly_nt35597_remove(struct mipi_dsi_device *dsi)
645{
646 struct truly_nt35597 *ctx = mipi_dsi_get_drvdata(dsi);
647
648 if (ctx->dsi[0])
649 mipi_dsi_detach(ctx->dsi[0]);
650 if (ctx->dsi[1]) {
651 mipi_dsi_detach(ctx->dsi[1]);
652 mipi_dsi_device_unregister(ctx->dsi[1]);
653 }
654
655 drm_panel_remove(&ctx->panel);
656 return 0;
657}
658
659static const struct of_device_id truly_nt35597_of_match[] = {
660 {
661 .compatible = "truly,nt35597-2K-display",
662 .data = &nt35597_dir,
663 },
664 { }
665};
666MODULE_DEVICE_TABLE(of, truly_nt35597_of_match);
667
668static struct mipi_dsi_driver truly_nt35597_driver = {
669 .driver = {
670 .name = "panel-truly-nt35597",
671 .of_match_table = truly_nt35597_of_match,
672 },
673 .probe = truly_nt35597_probe,
674 .remove = truly_nt35597_remove,
675};
676module_mipi_dsi_driver(truly_nt35597_driver);
677
678MODULE_DESCRIPTION("Truly NT35597 DSI Panel Driver");
679MODULE_LICENSE("GPL v2");
680
