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