1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
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.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};
68
69static inline struct truly_nt35597 *panel_to_ctx(struct drm_panel *panel)
70{
71 return container_of(panel, struct truly_nt35597, panel);
72}
73
74static const struct cmd_set qcom_2k_panel_magic_cmds[] = {
75 /* CMD2_P0 */
76 { { 0xff, 0x20 }, 2 },
77 { { 0xfb, 0x01 }, 2 },
78 { { 0x00, 0x01 }, 2 },
79 { { 0x01, 0x55 }, 2 },
80 { { 0x02, 0x45 }, 2 },
81 { { 0x05, 0x40 }, 2 },
82 { { 0x06, 0x19 }, 2 },
83 { { 0x07, 0x1e }, 2 },
84 { { 0x0b, 0x73 }, 2 },
85 { { 0x0c, 0x73 }, 2 },
86 { { 0x0e, 0xb0 }, 2 },
87 { { 0x0f, 0xae }, 2 },
88 { { 0x11, 0xb8 }, 2 },
89 { { 0x13, 0x00 }, 2 },
90 { { 0x58, 0x80 }, 2 },
91 { { 0x59, 0x01 }, 2 },
92 { { 0x5a, 0x00 }, 2 },
93 { { 0x5b, 0x01 }, 2 },
94 { { 0x5c, 0x80 }, 2 },
95 { { 0x5d, 0x81 }, 2 },
96 { { 0x5e, 0x00 }, 2 },
97 { { 0x5f, 0x01 }, 2 },
98 { { 0x72, 0x11 }, 2 },
99 { { 0x68, 0x03 }, 2 },
100 /* CMD2_P4 */
101 { { 0xFF, 0x24 }, 2 },
102 { { 0xFB, 0x01 }, 2 },
103 { { 0x00, 0x1C }, 2 },
104 { { 0x01, 0x0B }, 2 },
105 { { 0x02, 0x0C }, 2 },
106 { { 0x03, 0x01 }, 2 },
107 { { 0x04, 0x0F }, 2 },
108 { { 0x05, 0x10 }, 2 },
109 { { 0x06, 0x10 }, 2 },
110 { { 0x07, 0x10 }, 2 },
111 { { 0x08, 0x89 }, 2 },
112 { { 0x09, 0x8A }, 2 },
113 { { 0x0A, 0x13 }, 2 },
114 { { 0x0B, 0x13 }, 2 },
115 { { 0x0C, 0x15 }, 2 },
116 { { 0x0D, 0x15 }, 2 },
117 { { 0x0E, 0x17 }, 2 },
118 { { 0x0F, 0x17 }, 2 },
119 { { 0x10, 0x1C }, 2 },
120 { { 0x11, 0x0B }, 2 },
121 { { 0x12, 0x0C }, 2 },
122 { { 0x13, 0x01 }, 2 },
123 { { 0x14, 0x0F }, 2 },
124 { { 0x15, 0x10 }, 2 },
125 { { 0x16, 0x10 }, 2 },
126 { { 0x17, 0x10 }, 2 },
127 { { 0x18, 0x89 }, 2 },
128 { { 0x19, 0x8A }, 2 },
129 { { 0x1A, 0x13 }, 2 },
130 { { 0x1B, 0x13 }, 2 },
131 { { 0x1C, 0x15 }, 2 },
132 { { 0x1D, 0x15 }, 2 },
133 { { 0x1E, 0x17 }, 2 },
134 { { 0x1F, 0x17 }, 2 },
135 /* STV */
136 { { 0x20, 0x40 }, 2 },
137 { { 0x21, 0x01 }, 2 },
138 { { 0x22, 0x00 }, 2 },
139 { { 0x23, 0x40 }, 2 },
140 { { 0x24, 0x40 }, 2 },
141 { { 0x25, 0x6D }, 2 },
142 { { 0x26, 0x40 }, 2 },
143 { { 0x27, 0x40 }, 2 },
144 /* Vend */
145 { { 0xE0, 0x00 }, 2 },
146 { { 0xDC, 0x21 }, 2 },
147 { { 0xDD, 0x22 }, 2 },
148 { { 0xDE, 0x07 }, 2 },
149 { { 0xDF, 0x07 }, 2 },
150 { { 0xE3, 0x6D }, 2 },
151 { { 0xE1, 0x07 }, 2 },
152 { { 0xE2, 0x07 }, 2 },
153 /* UD */
154 { { 0x29, 0xD8 }, 2 },
155 { { 0x2A, 0x2A }, 2 },
156 /* CLK */
157 { { 0x4B, 0x03 }, 2 },
158 { { 0x4C, 0x11 }, 2 },
159 { { 0x4D, 0x10 }, 2 },
160 { { 0x4E, 0x01 }, 2 },
161 { { 0x4F, 0x01 }, 2 },
162 { { 0x50, 0x10 }, 2 },
163 { { 0x51, 0x00 }, 2 },
164 { { 0x52, 0x80 }, 2 },
165 { { 0x53, 0x00 }, 2 },
166 { { 0x56, 0x00 }, 2 },
167 { { 0x54, 0x07 }, 2 },
168 { { 0x58, 0x07 }, 2 },
169 { { 0x55, 0x25 }, 2 },
170 /* Reset XDONB */
171 { { 0x5B, 0x43 }, 2 },
172 { { 0x5C, 0x00 }, 2 },
173 { { 0x5F, 0x73 }, 2 },
174 { { 0x60, 0x73 }, 2 },
175 { { 0x63, 0x22 }, 2 },
176 { { 0x64, 0x00 }, 2 },
177 { { 0x67, 0x08 }, 2 },
178 { { 0x68, 0x04 }, 2 },
179 /* Resolution:1440x2560 */
180 { { 0x72, 0x02 }, 2 },
181 /* mux */
182 { { 0x7A, 0x80 }, 2 },
183 { { 0x7B, 0x91 }, 2 },
184 { { 0x7C, 0xD8 }, 2 },
185 { { 0x7D, 0x60 }, 2 },
186 { { 0x7F, 0x15 }, 2 },
187 { { 0x75, 0x15 }, 2 },
188 /* ABOFF */
189 { { 0xB3, 0xC0 }, 2 },
190 { { 0xB4, 0x00 }, 2 },
191 { { 0xB5, 0x00 }, 2 },
192 /* Source EQ */
193 { { 0x78, 0x00 }, 2 },
194 { { 0x79, 0x00 }, 2 },
195 { { 0x80, 0x00 }, 2 },
196 { { 0x83, 0x00 }, 2 },
197 /* FP BP */
198 { { 0x93, 0x0A }, 2 },
199 { { 0x94, 0x0A }, 2 },
200 /* Inversion Type */
201 { { 0x8A, 0x00 }, 2 },
202 { { 0x9B, 0xFF }, 2 },
203 /* IMGSWAP =1 @PortSwap=1 */
204 { { 0x9D, 0xB0 }, 2 },
205 { { 0x9F, 0x63 }, 2 },
206 { { 0x98, 0x10 }, 2 },
207 /* FRM */
208 { { 0xEC, 0x00 }, 2 },
209 /* CMD1 */
210 { { 0xFF, 0x10 }, 2 },
211 /* VBP+VSA=,VFP = 10H */
212 { { 0x3B, 0x03, 0x0A, 0x0A }, 4 },
213 /* FTE on */
214 { { 0x35, 0x00 }, 2 },
215 /* EN_BK =1(auto black) */
216 { { 0xE5, 0x01 }, 2 },
217 /* CMD mode(10) VDO mode(03) */
218 { { 0xBB, 0x03 }, 2 },
219 /* Non Reload MTP */
220 { { 0xFB, 0x01 }, 2 },
221};
222
223static int truly_dcs_write(struct drm_panel *panel, u32 command)
224{
225 struct truly_nt35597 *ctx = panel_to_ctx(panel);
226 int i, ret;
227
228 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
229 ret = mipi_dsi_dcs_write(dsi: ctx->dsi[i], cmd: command, NULL, len: 0);
230 if (ret < 0) {
231 dev_err(ctx->dev, "cmd 0x%x failed for dsi = %d\n", command, i);
232 }
233 }
234
235 return ret;
236}
237
238static int truly_dcs_write_buf(struct drm_panel *panel,
239 u32 size, const u8 *buf)
240{
241 struct truly_nt35597 *ctx = panel_to_ctx(panel);
242 int ret = 0;
243 int i;
244
245 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
246 ret = mipi_dsi_dcs_write_buffer(dsi: ctx->dsi[i], data: buf, len: size);
247 if (ret < 0) {
248 dev_err(ctx->dev, "failed to tx cmd [%d], err: %d\n", i, ret);
249 return ret;
250 }
251 }
252
253 return ret;
254}
255
256static int truly_35597_power_on(struct truly_nt35597 *ctx)
257{
258 int ret, i;
259
260 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
261 ret = regulator_set_load(regulator: ctx->supplies[i].consumer,
262 load_uA: regulator_enable_loads[i]);
263 if (ret)
264 return ret;
265 }
266
267 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), consumers: ctx->supplies);
268 if (ret < 0)
269 return ret;
270
271 /*
272 * Reset sequence of truly panel requires the panel to be
273 * out of reset for 10ms, followed by being held in reset
274 * for 10ms and then out again
275 */
276 gpiod_set_value(desc: ctx->reset_gpio, value: 0);
277 usleep_range(min: 10000, max: 20000);
278 gpiod_set_value(desc: ctx->reset_gpio, value: 1);
279 usleep_range(min: 10000, max: 20000);
280 gpiod_set_value(desc: ctx->reset_gpio, value: 0);
281 usleep_range(min: 10000, max: 20000);
282
283 return 0;
284}
285
286static int truly_nt35597_power_off(struct truly_nt35597 *ctx)
287{
288 int ret = 0;
289 int i;
290
291 gpiod_set_value(desc: ctx->reset_gpio, value: 1);
292
293 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
294 ret = regulator_set_load(regulator: ctx->supplies[i].consumer,
295 load_uA: regulator_disable_loads[i]);
296 if (ret) {
297 dev_err(ctx->dev, "regulator_set_load failed %d\n", ret);
298 return ret;
299 }
300 }
301
302 ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), consumers: ctx->supplies);
303 if (ret) {
304 dev_err(ctx->dev, "regulator_bulk_disable failed %d\n", ret);
305 }
306 return ret;
307}
308
309static int truly_nt35597_disable(struct drm_panel *panel)
310{
311 struct truly_nt35597 *ctx = panel_to_ctx(panel);
312 int ret;
313
314 if (ctx->backlight) {
315 ret = backlight_disable(bd: ctx->backlight);
316 if (ret < 0)
317 dev_err(ctx->dev, "backlight disable failed %d\n", ret);
318 }
319
320 return 0;
321}
322
323static int truly_nt35597_unprepare(struct drm_panel *panel)
324{
325 struct truly_nt35597 *ctx = panel_to_ctx(panel);
326 int ret = 0;
327
328 ctx->dsi[0]->mode_flags = 0;
329 ctx->dsi[1]->mode_flags = 0;
330
331 ret = truly_dcs_write(panel, command: MIPI_DCS_SET_DISPLAY_OFF);
332 if (ret < 0) {
333 dev_err(ctx->dev, "set_display_off cmd failed ret = %d\n", ret);
334 }
335
336 /* 120ms delay required here as per DCS spec */
337 msleep(msecs: 120);
338
339 ret = truly_dcs_write(panel, command: MIPI_DCS_ENTER_SLEEP_MODE);
340 if (ret < 0) {
341 dev_err(ctx->dev, "enter_sleep cmd failed ret = %d\n", ret);
342 }
343
344 ret = truly_nt35597_power_off(ctx);
345 if (ret < 0)
346 dev_err(ctx->dev, "power_off failed ret = %d\n", ret);
347
348 return ret;
349}
350
351static int truly_nt35597_prepare(struct drm_panel *panel)
352{
353 struct truly_nt35597 *ctx = panel_to_ctx(panel);
354 int ret;
355 int i;
356 const struct cmd_set *panel_on_cmds;
357 const struct nt35597_config *config;
358 u32 num_cmds;
359
360 ret = truly_35597_power_on(ctx);
361 if (ret < 0)
362 return ret;
363
364 ctx->dsi[0]->mode_flags |= MIPI_DSI_MODE_LPM;
365 ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;
366
367 config = ctx->config;
368 panel_on_cmds = config->panel_on_cmds;
369 num_cmds = config->num_on_cmds;
370
371 for (i = 0; i < num_cmds; i++) {
372 ret = truly_dcs_write_buf(panel,
373 size: panel_on_cmds[i].size,
374 buf: panel_on_cmds[i].commands);
375 if (ret < 0) {
376 dev_err(ctx->dev, "cmd set tx failed i = %d ret = %d\n", i, ret);
377 goto power_off;
378 }
379 }
380
381 ret = truly_dcs_write(panel, command: MIPI_DCS_EXIT_SLEEP_MODE);
382 if (ret < 0) {
383 dev_err(ctx->dev, "exit_sleep_mode cmd failed ret = %d\n", ret);
384 goto power_off;
385 }
386
387 /* Per DSI spec wait 120ms after sending exit sleep DCS command */
388 msleep(msecs: 120);
389
390 ret = truly_dcs_write(panel, command: MIPI_DCS_SET_DISPLAY_ON);
391 if (ret < 0) {
392 dev_err(ctx->dev, "set_display_on cmd failed ret = %d\n", ret);
393 goto power_off;
394 }
395
396 /* Per DSI spec wait 120ms after sending set_display_on DCS command */
397 msleep(msecs: 120);
398
399 return 0;
400
401power_off:
402 if (truly_nt35597_power_off(ctx))
403 dev_err(ctx->dev, "power_off failed\n");
404 return ret;
405}
406
407static int truly_nt35597_enable(struct drm_panel *panel)
408{
409 struct truly_nt35597 *ctx = panel_to_ctx(panel);
410 int ret;
411
412 if (ctx->backlight) {
413 ret = backlight_enable(bd: ctx->backlight);
414 if (ret < 0)
415 dev_err(ctx->dev, "backlight enable failed %d\n", ret);
416 }
417
418 return 0;
419}
420
421static int truly_nt35597_get_modes(struct drm_panel *panel,
422 struct drm_connector *connector)
423{
424 struct truly_nt35597 *ctx = panel_to_ctx(panel);
425 struct drm_display_mode *mode;
426 const struct nt35597_config *config;
427
428 config = ctx->config;
429 mode = drm_mode_duplicate(dev: connector->dev, mode: config->dm);
430 if (!mode) {
431 dev_err(ctx->dev, "failed to create a new display mode\n");
432 return 0;
433 }
434
435 connector->display_info.width_mm = config->width_mm;
436 connector->display_info.height_mm = config->height_mm;
437 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
438 drm_mode_probed_add(connector, mode);
439
440 return 1;
441}
442
443static const struct drm_panel_funcs truly_nt35597_drm_funcs = {
444 .disable = truly_nt35597_disable,
445 .unprepare = truly_nt35597_unprepare,
446 .prepare = truly_nt35597_prepare,
447 .enable = truly_nt35597_enable,
448 .get_modes = truly_nt35597_get_modes,
449};
450
451static int truly_nt35597_panel_add(struct truly_nt35597 *ctx)
452{
453 struct device *dev = ctx->dev;
454 int ret, i;
455
456 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++)
457 ctx->supplies[i].supply = regulator_names[i];
458
459 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
460 consumers: ctx->supplies);
461 if (ret < 0)
462 return ret;
463
464 ctx->reset_gpio = devm_gpiod_get(dev, con_id: "reset", flags: GPIOD_OUT_LOW);
465 if (IS_ERR(ptr: ctx->reset_gpio)) {
466 dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));
467 return PTR_ERR(ptr: ctx->reset_gpio);
468 }
469
470 ctx->mode_gpio = devm_gpiod_get(dev, con_id: "mode", flags: GPIOD_OUT_LOW);
471 if (IS_ERR(ptr: ctx->mode_gpio)) {
472 dev_err(dev, "cannot get mode gpio %ld\n", PTR_ERR(ctx->mode_gpio));
473 return PTR_ERR(ptr: ctx->mode_gpio);
474 }
475
476 /* dual port */
477 gpiod_set_value(desc: ctx->mode_gpio, value: 0);
478
479 drm_panel_init(panel: &ctx->panel, dev, funcs: &truly_nt35597_drm_funcs,
480 DRM_MODE_CONNECTOR_DSI);
481 drm_panel_add(panel: &ctx->panel);
482
483 return 0;
484}
485
486static const struct drm_display_mode qcom_sdm845_mtp_2k_mode = {
487 .name = "1440x2560",
488 .clock = 268316,
489 .hdisplay = 1440,
490 .hsync_start = 1440 + 200,
491 .hsync_end = 1440 + 200 + 32,
492 .htotal = 1440 + 200 + 32 + 64,
493 .vdisplay = 2560,
494 .vsync_start = 2560 + 8,
495 .vsync_end = 2560 + 8 + 1,
496 .vtotal = 2560 + 8 + 1 + 7,
497 .flags = 0,
498};
499
500static const struct nt35597_config nt35597_dir = {
501 .width_mm = 74,
502 .height_mm = 131,
503 .panel_name = "qcom_sdm845_mtp_2k_panel",
504 .dm = &qcom_sdm845_mtp_2k_mode,
505 .panel_on_cmds = qcom_2k_panel_magic_cmds,
506 .num_on_cmds = ARRAY_SIZE(qcom_2k_panel_magic_cmds),
507};
508
509static int truly_nt35597_probe(struct mipi_dsi_device *dsi)
510{
511 struct device *dev = &dsi->dev;
512 struct truly_nt35597 *ctx;
513 struct mipi_dsi_device *dsi1_device;
514 struct device_node *dsi1;
515 struct mipi_dsi_host *dsi1_host;
516 struct mipi_dsi_device *dsi_dev;
517 int ret = 0;
518 int i;
519
520 const struct mipi_dsi_device_info info = {
521 .type = "trulynt35597",
522 .channel = 0,
523 .node = NULL,
524 };
525
526 ctx = devm_kzalloc(dev, size: sizeof(*ctx), GFP_KERNEL);
527
528 if (!ctx)
529 return -ENOMEM;
530
531 /*
532 * This device represents itself as one with two input ports which are
533 * fed by the output ports of the two DSI controllers . The DSI0 is
534 * the master controller and has most of the panel related info in its
535 * child node.
536 */
537
538 ctx->config = of_device_get_match_data(dev);
539
540 if (!ctx->config) {
541 dev_err(dev, "missing device configuration\n");
542 return -ENODEV;
543 }
544
545 dsi1 = of_graph_get_remote_node(node: dsi->dev.of_node, port: 1, endpoint: -1);
546 if (!dsi1) {
547 dev_err(dev, "failed to get remote node for dsi1_device\n");
548 return -ENODEV;
549 }
550
551 dsi1_host = of_find_mipi_dsi_host_by_node(node: dsi1);
552 of_node_put(node: dsi1);
553 if (!dsi1_host) {
554 dev_err(dev, "failed to find dsi host\n");
555 return -EPROBE_DEFER;
556 }
557
558 /* register the second DSI device */
559 dsi1_device = mipi_dsi_device_register_full(host: dsi1_host, info: &info);
560 if (IS_ERR(ptr: dsi1_device)) {
561 dev_err(dev, "failed to create dsi device\n");
562 return PTR_ERR(ptr: dsi1_device);
563 }
564
565 mipi_dsi_set_drvdata(dsi, data: ctx);
566
567 ctx->dev = dev;
568 ctx->dsi[0] = dsi;
569 ctx->dsi[1] = dsi1_device;
570
571 ret = truly_nt35597_panel_add(ctx);
572 if (ret) {
573 dev_err(dev, "failed to add panel\n");
574 goto err_panel_add;
575 }
576
577 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
578 dsi_dev = ctx->dsi[i];
579 dsi_dev->lanes = 4;
580 dsi_dev->format = MIPI_DSI_FMT_RGB888;
581 dsi_dev->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
582 MIPI_DSI_CLOCK_NON_CONTINUOUS;
583 ret = mipi_dsi_attach(dsi: dsi_dev);
584 if (ret < 0) {
585 dev_err(dev, "dsi attach failed i = %d\n", i);
586 goto err_dsi_attach;
587 }
588 }
589
590 return 0;
591
592err_dsi_attach:
593 drm_panel_remove(panel: &ctx->panel);
594err_panel_add:
595 mipi_dsi_device_unregister(dsi: dsi1_device);
596 return ret;
597}
598
599static void truly_nt35597_remove(struct mipi_dsi_device *dsi)
600{
601 struct truly_nt35597 *ctx = mipi_dsi_get_drvdata(dsi);
602
603 if (ctx->dsi[0])
604 mipi_dsi_detach(dsi: ctx->dsi[0]);
605 if (ctx->dsi[1]) {
606 mipi_dsi_detach(dsi: ctx->dsi[1]);
607 mipi_dsi_device_unregister(dsi: ctx->dsi[1]);
608 }
609
610 drm_panel_remove(panel: &ctx->panel);
611}
612
613static const struct of_device_id truly_nt35597_of_match[] = {
614 {
615 .compatible = "truly,nt35597-2K-display",
616 .data = &nt35597_dir,
617 },
618 { }
619};
620MODULE_DEVICE_TABLE(of, truly_nt35597_of_match);
621
622static struct mipi_dsi_driver truly_nt35597_driver = {
623 .driver = {
624 .name = "panel-truly-nt35597",
625 .of_match_table = truly_nt35597_of_match,
626 },
627 .probe = truly_nt35597_probe,
628 .remove = truly_nt35597_remove,
629};
630module_mipi_dsi_driver(truly_nt35597_driver);
631
632MODULE_DESCRIPTION("Truly NT35597 DSI Panel Driver");
633MODULE_LICENSE("GPL v2");
634

source code of linux/drivers/gpu/drm/panel/panel-truly-nt35597.c