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11#include <linux/backlight.h>
12#include <linux/delay.h>
13#include <linux/gpio/consumer.h>
14#include <linux/module.h>
15#include <linux/regulator/consumer.h>
16
17#include <video/mipi_display.h>
18
19#include <drm/drm_mipi_dsi.h>
20#include <drm/drm_modes.h>
21#include <drm/drm_panel.h>
22#include <drm/drm_print.h>
23
24#define MCS_LEVEL2_KEY 0xf0
25#define MCS_MTP_KEY 0xf1
26#define MCS_MTP_SET3 0xd4
27
28#define MAX_BRIGHTNESS 100
29#define DEFAULT_BRIGHTNESS 80
30
31#define NUM_GAMMA_STEPS 9
32#define GAMMA_CMD_CNT 28
33
34#define FIRST_COLUMN 20
35
36struct s6e63j0x03 {
37 struct device *dev;
38 struct drm_panel panel;
39 struct backlight_device *bl_dev;
40
41 struct regulator_bulk_data supplies[2];
42 struct gpio_desc *reset_gpio;
43};
44
45static const struct drm_display_mode default_mode = {
46 .clock = 4649,
47 .hdisplay = 320,
48 .hsync_start = 320 + 1,
49 .hsync_end = 320 + 1 + 1,
50 .htotal = 320 + 1 + 1 + 1,
51 .vdisplay = 320,
52 .vsync_start = 320 + 150,
53 .vsync_end = 320 + 150 + 1,
54 .vtotal = 320 + 150 + 1 + 2,
55 .vrefresh = 30,
56 .flags = 0,
57};
58
59static const unsigned char gamma_tbl[NUM_GAMMA_STEPS][GAMMA_CMD_CNT] = {
60 {
61 MCS_MTP_SET3,
62 0x00, 0x00, 0x00, 0x7f, 0x7f, 0x7f, 0x52, 0x6b, 0x6f, 0x26,
63 0x28, 0x2d, 0x28, 0x26, 0x27, 0x33, 0x34, 0x32, 0x36, 0x36,
64 0x35, 0x00, 0xab, 0x00, 0xae, 0x00, 0xbf
65 },
66 {
67 MCS_MTP_SET3,
68 0x00, 0x00, 0x00, 0x70, 0x7f, 0x7f, 0x4e, 0x64, 0x69, 0x26,
69 0x27, 0x2a, 0x28, 0x29, 0x27, 0x31, 0x32, 0x31, 0x35, 0x34,
70 0x35, 0x00, 0xc4, 0x00, 0xca, 0x00, 0xdc
71 },
72 {
73 MCS_MTP_SET3,
74 0x00, 0x00, 0x00, 0x65, 0x7b, 0x7d, 0x5f, 0x67, 0x68, 0x2a,
75 0x28, 0x29, 0x28, 0x2a, 0x27, 0x31, 0x2f, 0x30, 0x34, 0x33,
76 0x34, 0x00, 0xd9, 0x00, 0xe4, 0x00, 0xf5
77 },
78 {
79 MCS_MTP_SET3,
80 0x00, 0x00, 0x00, 0x4d, 0x6f, 0x71, 0x67, 0x6a, 0x6c, 0x29,
81 0x28, 0x28, 0x28, 0x29, 0x27, 0x30, 0x2e, 0x30, 0x32, 0x31,
82 0x31, 0x00, 0xea, 0x00, 0xf6, 0x01, 0x09
83 },
84 {
85 MCS_MTP_SET3,
86 0x00, 0x00, 0x00, 0x3d, 0x66, 0x68, 0x69, 0x69, 0x69, 0x28,
87 0x28, 0x27, 0x28, 0x28, 0x27, 0x30, 0x2e, 0x2f, 0x31, 0x31,
88 0x30, 0x00, 0xf9, 0x01, 0x05, 0x01, 0x1b
89 },
90 {
91 MCS_MTP_SET3,
92 0x00, 0x00, 0x00, 0x31, 0x51, 0x53, 0x66, 0x66, 0x67, 0x28,
93 0x29, 0x27, 0x28, 0x27, 0x27, 0x2e, 0x2d, 0x2e, 0x31, 0x31,
94 0x30, 0x01, 0x04, 0x01, 0x11, 0x01, 0x29
95 },
96 {
97 MCS_MTP_SET3,
98 0x00, 0x00, 0x00, 0x2f, 0x4f, 0x51, 0x67, 0x65, 0x65, 0x29,
99 0x2a, 0x28, 0x27, 0x25, 0x26, 0x2d, 0x2c, 0x2c, 0x30, 0x30,
100 0x30, 0x01, 0x14, 0x01, 0x23, 0x01, 0x3b
101 },
102 {
103 MCS_MTP_SET3,
104 0x00, 0x00, 0x00, 0x2c, 0x4d, 0x50, 0x65, 0x63, 0x64, 0x2a,
105 0x2c, 0x29, 0x26, 0x24, 0x25, 0x2c, 0x2b, 0x2b, 0x30, 0x30,
106 0x30, 0x01, 0x1e, 0x01, 0x2f, 0x01, 0x47
107 },
108 {
109 MCS_MTP_SET3,
110 0x00, 0x00, 0x00, 0x38, 0x61, 0x64, 0x65, 0x63, 0x64, 0x28,
111 0x2a, 0x27, 0x26, 0x23, 0x25, 0x2b, 0x2b, 0x2a, 0x30, 0x2f,
112 0x30, 0x01, 0x2d, 0x01, 0x3f, 0x01, 0x57
113 }
114};
115
116static inline struct s6e63j0x03 *panel_to_s6e63j0x03(struct drm_panel *panel)
117{
118 return container_of(panel, struct s6e63j0x03, panel);
119}
120
121static inline ssize_t s6e63j0x03_dcs_write_seq(struct s6e63j0x03 *ctx,
122 const void *seq, size_t len)
123{
124 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
125
126 return mipi_dsi_dcs_write_buffer(dsi, seq, len);
127}
128
129#define s6e63j0x03_dcs_write_seq_static(ctx, seq...) \
130 ({ \
131 static const u8 d[] = { seq }; \
132 s6e63j0x03_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \
133 })
134
135static inline int s6e63j0x03_enable_lv2_command(struct s6e63j0x03 *ctx)
136{
137 return s6e63j0x03_dcs_write_seq_static(ctx, MCS_LEVEL2_KEY, 0x5a, 0x5a);
138}
139
140static inline int s6e63j0x03_apply_mtp_key(struct s6e63j0x03 *ctx, bool on)
141{
142 if (on)
143 return s6e63j0x03_dcs_write_seq_static(ctx,
144 MCS_MTP_KEY, 0x5a, 0x5a);
145
146 return s6e63j0x03_dcs_write_seq_static(ctx, MCS_MTP_KEY, 0xa5, 0xa5);
147}
148
149static int s6e63j0x03_power_on(struct s6e63j0x03 *ctx)
150{
151 int ret;
152
153 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
154 if (ret < 0)
155 return ret;
156
157 msleep(30);
158
159 gpiod_set_value(ctx->reset_gpio, 1);
160 usleep_range(1000, 2000);
161 gpiod_set_value(ctx->reset_gpio, 0);
162 usleep_range(5000, 6000);
163
164 return 0;
165}
166
167static int s6e63j0x03_power_off(struct s6e63j0x03 *ctx)
168{
169 return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
170}
171
172static unsigned int s6e63j0x03_get_brightness_index(unsigned int brightness)
173{
174 unsigned int index;
175
176 index = brightness / (MAX_BRIGHTNESS / NUM_GAMMA_STEPS);
177
178 if (index >= NUM_GAMMA_STEPS)
179 index = NUM_GAMMA_STEPS - 1;
180
181 return index;
182}
183
184static int s6e63j0x03_update_gamma(struct s6e63j0x03 *ctx,
185 unsigned int brightness)
186{
187 struct backlight_device *bl_dev = ctx->bl_dev;
188 unsigned int index = s6e63j0x03_get_brightness_index(brightness);
189 int ret;
190
191 ret = s6e63j0x03_apply_mtp_key(ctx, true);
192 if (ret < 0)
193 return ret;
194
195 ret = s6e63j0x03_dcs_write_seq(ctx, gamma_tbl[index], GAMMA_CMD_CNT);
196 if (ret < 0)
197 return ret;
198
199 ret = s6e63j0x03_apply_mtp_key(ctx, false);
200 if (ret < 0)
201 return ret;
202
203 bl_dev->props.brightness = brightness;
204
205 return 0;
206}
207
208static int s6e63j0x03_set_brightness(struct backlight_device *bl_dev)
209{
210 struct s6e63j0x03 *ctx = bl_get_data(bl_dev);
211 unsigned int brightness = bl_dev->props.brightness;
212
213 return s6e63j0x03_update_gamma(ctx, brightness);
214}
215
216static const struct backlight_ops s6e63j0x03_bl_ops = {
217 .update_status = s6e63j0x03_set_brightness,
218};
219
220static int s6e63j0x03_disable(struct drm_panel *panel)
221{
222 struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
223 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
224 int ret;
225
226 ret = mipi_dsi_dcs_set_display_off(dsi);
227 if (ret < 0)
228 return ret;
229
230 ctx->bl_dev->props.power = FB_BLANK_NORMAL;
231
232 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
233 if (ret < 0)
234 return ret;
235
236 msleep(120);
237
238 return 0;
239}
240
241static int s6e63j0x03_unprepare(struct drm_panel *panel)
242{
243 struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
244 int ret;
245
246 ret = s6e63j0x03_power_off(ctx);
247 if (ret < 0)
248 return ret;
249
250 ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
251
252 return 0;
253}
254
255static int s6e63j0x03_panel_init(struct s6e63j0x03 *ctx)
256{
257 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
258 int ret;
259
260 ret = s6e63j0x03_enable_lv2_command(ctx);
261 if (ret < 0)
262 return ret;
263
264 ret = s6e63j0x03_apply_mtp_key(ctx, true);
265 if (ret < 0)
266 return ret;
267
268
269 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf2, 0x1c, 0x28);
270 if (ret < 0)
271 return ret;
272
273
274 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb5, 0x00, 0x02, 0x00);
275 if (ret < 0)
276 return ret;
277
278
279 ret = mipi_dsi_dcs_set_column_address(dsi, FIRST_COLUMN,
280 default_mode.hdisplay - 1 + FIRST_COLUMN);
281 if (ret < 0)
282 return ret;
283
284 ret = mipi_dsi_dcs_set_page_address(dsi, 0, default_mode.vdisplay - 1);
285 if (ret < 0)
286 return ret;
287
288
289 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf8, 0x08, 0x08, 0x08, 0x17,
290 0x00, 0x2a, 0x02, 0x26, 0x00, 0x00, 0x02, 0x00, 0x00);
291 if (ret < 0)
292 return ret;
293
294 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf7, 0x02);
295 if (ret < 0)
296 return ret;
297
298
299 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb0, 0x01);
300 if (ret < 0)
301 return ret;
302
303
304 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xe2, 0x0f);
305 if (ret < 0)
306 return ret;
307
308
309 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb0, 0x00);
310 if (ret < 0)
311 return ret;
312
313 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
314 if (ret < 0)
315 return ret;
316
317 ret = s6e63j0x03_apply_mtp_key(ctx, false);
318 if (ret < 0)
319 return ret;
320
321 return 0;
322}
323
324static int s6e63j0x03_prepare(struct drm_panel *panel)
325{
326 struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
327 int ret;
328
329 ret = s6e63j0x03_power_on(ctx);
330 if (ret < 0)
331 return ret;
332
333 ret = s6e63j0x03_panel_init(ctx);
334 if (ret < 0)
335 goto err;
336
337 ctx->bl_dev->props.power = FB_BLANK_NORMAL;
338
339 return 0;
340
341err:
342 s6e63j0x03_power_off(ctx);
343 return ret;
344}
345
346static int s6e63j0x03_enable(struct drm_panel *panel)
347{
348 struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
349 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
350 int ret;
351
352 msleep(120);
353
354 ret = s6e63j0x03_apply_mtp_key(ctx, true);
355 if (ret < 0)
356 return ret;
357
358
359 ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb1, 0x00, 0x09);
360 if (ret < 0)
361 return ret;
362
363
364 ret = s6e63j0x03_dcs_write_seq_static(ctx,
365 MIPI_DCS_SET_ADDRESS_MODE, 0x40);
366 if (ret < 0)
367 return ret;
368
369
370 ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x00ff);
371 if (ret < 0)
372 return ret;
373
374
375 ret = s6e63j0x03_dcs_write_seq_static(ctx,
376 MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
377 if (ret < 0)
378 return ret;
379
380
381 ret = s6e63j0x03_dcs_write_seq_static(ctx,
382 MIPI_DCS_WRITE_POWER_SAVE, 0x00);
383 if (ret < 0)
384 return ret;
385
386 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
387 if (ret < 0)
388 return ret;
389
390 ret = s6e63j0x03_apply_mtp_key(ctx, false);
391 if (ret < 0)
392 return ret;
393
394 ret = mipi_dsi_dcs_set_display_on(dsi);
395 if (ret < 0)
396 return ret;
397
398 ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
399
400 return 0;
401}
402
403static int s6e63j0x03_get_modes(struct drm_panel *panel)
404{
405 struct drm_connector *connector = panel->connector;
406 struct drm_display_mode *mode;
407
408 mode = drm_mode_duplicate(panel->drm, &default_mode);
409 if (!mode) {
410 DRM_ERROR("failed to add mode %ux%ux@%u\n",
411 default_mode.hdisplay, default_mode.vdisplay,
412 default_mode.vrefresh);
413 return -ENOMEM;
414 }
415
416 drm_mode_set_name(mode);
417
418 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
419 drm_mode_probed_add(connector, mode);
420
421 connector->display_info.width_mm = 29;
422 connector->display_info.height_mm = 29;
423
424 return 1;
425}
426
427static const struct drm_panel_funcs s6e63j0x03_funcs = {
428 .disable = s6e63j0x03_disable,
429 .unprepare = s6e63j0x03_unprepare,
430 .prepare = s6e63j0x03_prepare,
431 .enable = s6e63j0x03_enable,
432 .get_modes = s6e63j0x03_get_modes,
433};
434
435static int s6e63j0x03_probe(struct mipi_dsi_device *dsi)
436{
437 struct device *dev = &dsi->dev;
438 struct s6e63j0x03 *ctx;
439 int ret;
440
441 ctx = devm_kzalloc(dev, sizeof(struct s6e63j0x03), GFP_KERNEL);
442 if (!ctx)
443 return -ENOMEM;
444
445 mipi_dsi_set_drvdata(dsi, ctx);
446
447 ctx->dev = dev;
448
449 dsi->lanes = 1;
450 dsi->format = MIPI_DSI_FMT_RGB888;
451 dsi->mode_flags = MIPI_DSI_MODE_EOT_PACKET;
452
453 ctx->supplies[0].supply = "vdd3";
454 ctx->supplies[1].supply = "vci";
455 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
456 ctx->supplies);
457 if (ret < 0) {
458 dev_err(dev, "failed to get regulators: %d\n", ret);
459 return ret;
460 }
461
462 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
463 if (IS_ERR(ctx->reset_gpio)) {
464 dev_err(dev, "cannot get reset-gpio: %ld\n",
465 PTR_ERR(ctx->reset_gpio));
466 return PTR_ERR(ctx->reset_gpio);
467 }
468
469 drm_panel_init(&ctx->panel);
470 ctx->panel.dev = dev;
471 ctx->panel.funcs = &s6e63j0x03_funcs;
472
473 ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx,
474 &s6e63j0x03_bl_ops, NULL);
475 if (IS_ERR(ctx->bl_dev)) {
476 dev_err(dev, "failed to register backlight device\n");
477 return PTR_ERR(ctx->bl_dev);
478 }
479
480 ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS;
481 ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS;
482 ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
483
484 ret = drm_panel_add(&ctx->panel);
485 if (ret < 0)
486 goto unregister_backlight;
487
488 ret = mipi_dsi_attach(dsi);
489 if (ret < 0)
490 goto remove_panel;
491
492 return ret;
493
494remove_panel:
495 drm_panel_remove(&ctx->panel);
496
497unregister_backlight:
498 backlight_device_unregister(ctx->bl_dev);
499
500 return ret;
501}
502
503static int s6e63j0x03_remove(struct mipi_dsi_device *dsi)
504{
505 struct s6e63j0x03 *ctx = mipi_dsi_get_drvdata(dsi);
506
507 mipi_dsi_detach(dsi);
508 drm_panel_remove(&ctx->panel);
509
510 backlight_device_unregister(ctx->bl_dev);
511
512 return 0;
513}
514
515static const struct of_device_id s6e63j0x03_of_match[] = {
516 { .compatible = "samsung,s6e63j0x03" },
517 { }
518};
519MODULE_DEVICE_TABLE(of, s6e63j0x03_of_match);
520
521static struct mipi_dsi_driver s6e63j0x03_driver = {
522 .probe = s6e63j0x03_probe,
523 .remove = s6e63j0x03_remove,
524 .driver = {
525 .name = "panel_samsung_s6e63j0x03",
526 .of_match_table = s6e63j0x03_of_match,
527 },
528};
529module_mipi_dsi_driver(s6e63j0x03_driver);
530
531MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
532MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@samsung.com>");
533MODULE_DESCRIPTION("MIPI-DSI based s6e63j0x03 AMOLED LCD Panel Driver");
534MODULE_LICENSE("GPL v2");
535
