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24#include <linux/backlight.h>
25#include <linux/gpio/consumer.h>
26#include <linux/module.h>
27#include <linux/of_platform.h>
28#include <linux/platform_device.h>
29#include <linux/regulator/consumer.h>
30
31#include <drm/drmP.h>
32#include <drm/drm_crtc.h>
33#include <drm/drm_mipi_dsi.h>
34#include <drm/drm_panel.h>
35
36struct panel_desc {
37 const struct drm_display_mode *modes;
38 unsigned int num_modes;
39
40 struct {
41 unsigned int width;
42 unsigned int height;
43 } size;
44};
45
46struct panel_simple {
47 struct drm_panel base;
48 bool enabled;
49
50 const struct panel_desc *desc;
51
52 struct backlight_device *backlight;
53 struct regulator *supply;
54 struct i2c_adapter *ddc;
55
56 struct gpio_desc *enable_gpio;
57};
58
59static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
60{
61 return container_of(panel, struct panel_simple, base);
62}
63
64static int panel_simple_get_fixed_modes(struct panel_simple *panel)
65{
66 struct drm_connector *connector = panel->base.connector;
67 struct drm_device *drm = panel->base.drm;
68 struct drm_display_mode *mode;
69 unsigned int i, num = 0;
70
71 if (!panel->desc)
72 return 0;
73
74 for (i = 0; i < panel->desc->num_modes; i++) {
75 const struct drm_display_mode *m = &panel->desc->modes[i];
76
77 mode = drm_mode_duplicate(drm, m);
78 if (!mode) {
79 dev_err(drm->dev, "failed to add mode %ux%u@%u\n",
80 m->hdisplay, m->vdisplay, m->vrefresh);
81 continue;
82 }
83
84 drm_mode_set_name(mode);
85
86 drm_mode_probed_add(connector, mode);
87 num++;
88 }
89
90 connector->display_info.width_mm = panel->desc->size.width;
91 connector->display_info.height_mm = panel->desc->size.height;
92
93 return num;
94}
95
96static int panel_simple_disable(struct drm_panel *panel)
97{
98 struct panel_simple *p = to_panel_simple(panel);
99
100 if (!p->enabled)
101 return 0;
102
103 if (p->backlight) {
104 p->backlight->props.power = FB_BLANK_POWERDOWN;
105 backlight_update_status(p->backlight);
106 }
107
108 if (p->enable_gpio)
109 gpiod_set_value_cansleep(p->enable_gpio, 0);
110
111 regulator_disable(p->supply);
112 p->enabled = false;
113
114 return 0;
115}
116
117static int panel_simple_enable(struct drm_panel *panel)
118{
119 struct panel_simple *p = to_panel_simple(panel);
120 int err;
121
122 if (p->enabled)
123 return 0;
124
125 err = regulator_enable(p->supply);
126 if (err < 0) {
127 dev_err(panel->dev, "failed to enable supply: %d\n", err);
128 return err;
129 }
130
131 if (p->enable_gpio)
132 gpiod_set_value_cansleep(p->enable_gpio, 1);
133
134 if (p->backlight) {
135 p->backlight->props.power = FB_BLANK_UNBLANK;
136 backlight_update_status(p->backlight);
137 }
138
139 p->enabled = true;
140
141 return 0;
142}
143
144static int panel_simple_get_modes(struct drm_panel *panel)
145{
146 struct panel_simple *p = to_panel_simple(panel);
147 int num = 0;
148
149
150 if (p->ddc) {
151 struct edid *edid = drm_get_edid(panel->connector, p->ddc);
152 drm_mode_connector_update_edid_property(panel->connector, edid);
153 if (edid) {
154 num += drm_add_edid_modes(panel->connector, edid);
155 kfree(edid);
156 }
157 }
158
159
160 num += panel_simple_get_fixed_modes(p);
161
162 return num;
163}
164
165static const struct drm_panel_funcs panel_simple_funcs = {
166 .disable = panel_simple_disable,
167 .enable = panel_simple_enable,
168 .get_modes = panel_simple_get_modes,
169};
170
171static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
172{
173 struct device_node *backlight, *ddc;
174 struct panel_simple *panel;
175 int err;
176
177 panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
178 if (!panel)
179 return -ENOMEM;
180
181 panel->enabled = false;
182 panel->desc = desc;
183
184 panel->supply = devm_regulator_get(dev, "power");
185 if (IS_ERR(panel->supply))
186 return PTR_ERR(panel->supply);
187
188 panel->enable_gpio = devm_gpiod_get(dev, "enable");
189 if (IS_ERR(panel->enable_gpio)) {
190 err = PTR_ERR(panel->enable_gpio);
191 if (err != -ENOENT) {
192 dev_err(dev, "failed to request GPIO: %d\n", err);
193 return err;
194 }
195
196 panel->enable_gpio = NULL;
197 } else {
198 err = gpiod_direction_output(panel->enable_gpio, 0);
199 if (err < 0) {
200 dev_err(dev, "failed to setup GPIO: %d\n", err);
201 return err;
202 }
203 }
204
205 backlight = of_parse_phandle(dev->of_node, "backlight", 0);
206 if (backlight) {
207 panel->backlight = of_find_backlight_by_node(backlight);
208 of_node_put(backlight);
209
210 if (!panel->backlight)
211 return -EPROBE_DEFER;
212 }
213
214 ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
215 if (ddc) {
216 panel->ddc = of_find_i2c_adapter_by_node(ddc);
217 of_node_put(ddc);
218
219 if (!panel->ddc) {
220 err = -EPROBE_DEFER;
221 goto free_backlight;
222 }
223 }
224
225 drm_panel_init(&panel->base);
226 panel->base.dev = dev;
227 panel->base.funcs = &panel_simple_funcs;
228
229 err = drm_panel_add(&panel->base);
230 if (err < 0)
231 goto free_ddc;
232
233 dev_set_drvdata(dev, panel);
234
235 return 0;
236
237free_ddc:
238 if (panel->ddc)
239 put_device(&panel->ddc->dev);
240free_backlight:
241 if (panel->backlight)
242 put_device(&panel->backlight->dev);
243
244 return err;
245}
246
247static int panel_simple_remove(struct device *dev)
248{
249 struct panel_simple *panel = dev_get_drvdata(dev);
250
251 drm_panel_detach(&panel->base);
252 drm_panel_remove(&panel->base);
253
254 panel_simple_disable(&panel->base);
255
256 if (panel->ddc)
257 put_device(&panel->ddc->dev);
258
259 if (panel->backlight)
260 put_device(&panel->backlight->dev);
261
262 return 0;
263}
264
265static void panel_simple_shutdown(struct device *dev)
266{
267 struct panel_simple *panel = dev_get_drvdata(dev);
268
269 panel_simple_disable(&panel->base);
270}
271
272static const struct drm_display_mode auo_b101aw03_mode = {
273 .clock = 51450,
274 .hdisplay = 1024,
275 .hsync_start = 1024 + 156,
276 .hsync_end = 1024 + 156 + 8,
277 .htotal = 1024 + 156 + 8 + 156,
278 .vdisplay = 600,
279 .vsync_start = 600 + 16,
280 .vsync_end = 600 + 16 + 6,
281 .vtotal = 600 + 16 + 6 + 16,
282 .vrefresh = 60,
283};
284
285static const struct panel_desc auo_b101aw03 = {
286 .modes = &auo_b101aw03_mode,
287 .num_modes = 1,
288 .size = {
289 .width = 223,
290 .height = 125,
291 },
292};
293
294static const struct drm_display_mode auo_b133xtn01_mode = {
295 .clock = 69500,
296 .hdisplay = 1366,
297 .hsync_start = 1366 + 48,
298 .hsync_end = 1366 + 48 + 32,
299 .htotal = 1366 + 48 + 32 + 20,
300 .vdisplay = 768,
301 .vsync_start = 768 + 3,
302 .vsync_end = 768 + 3 + 6,
303 .vtotal = 768 + 3 + 6 + 13,
304 .vrefresh = 60,
305};
306
307static const struct panel_desc auo_b133xtn01 = {
308 .modes = &auo_b133xtn01_mode,
309 .num_modes = 1,
310 .size = {
311 .width = 293,
312 .height = 165,
313 },
314};
315
316static const struct drm_display_mode chunghwa_claa101wa01a_mode = {
317 .clock = 72070,
318 .hdisplay = 1366,
319 .hsync_start = 1366 + 58,
320 .hsync_end = 1366 + 58 + 58,
321 .htotal = 1366 + 58 + 58 + 58,
322 .vdisplay = 768,
323 .vsync_start = 768 + 4,
324 .vsync_end = 768 + 4 + 4,
325 .vtotal = 768 + 4 + 4 + 4,
326 .vrefresh = 60,
327};
328
329static const struct panel_desc chunghwa_claa101wa01a = {
330 .modes = &chunghwa_claa101wa01a_mode,
331 .num_modes = 1,
332 .size = {
333 .width = 220,
334 .height = 120,
335 },
336};
337
338static const struct drm_display_mode chunghwa_claa101wb01_mode = {
339 .clock = 69300,
340 .hdisplay = 1366,
341 .hsync_start = 1366 + 48,
342 .hsync_end = 1366 + 48 + 32,
343 .htotal = 1366 + 48 + 32 + 20,
344 .vdisplay = 768,
345 .vsync_start = 768 + 16,
346 .vsync_end = 768 + 16 + 8,
347 .vtotal = 768 + 16 + 8 + 16,
348 .vrefresh = 60,
349};
350
351static const struct panel_desc chunghwa_claa101wb01 = {
352 .modes = &chunghwa_claa101wb01_mode,
353 .num_modes = 1,
354 .size = {
355 .width = 223,
356 .height = 125,
357 },
358};
359
360static const struct drm_display_mode edt_et057090dhu_mode = {
361 .clock = 25175,
362 .hdisplay = 640,
363 .hsync_start = 640 + 16,
364 .hsync_end = 640 + 16 + 30,
365 .htotal = 640 + 16 + 30 + 114,
366 .vdisplay = 480,
367 .vsync_start = 480 + 10,
368 .vsync_end = 480 + 10 + 3,
369 .vtotal = 480 + 10 + 3 + 32,
370 .vrefresh = 60,
371 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
372};
373
374static const struct panel_desc edt_et057090dhu = {
375 .modes = &edt_et057090dhu_mode,
376 .num_modes = 1,
377 .size = {
378 .width = 115,
379 .height = 86,
380 },
381};
382
383static const struct drm_display_mode edt_etm0700g0dh6_mode = {
384 .clock = 33260,
385 .hdisplay = 800,
386 .hsync_start = 800 + 40,
387 .hsync_end = 800 + 40 + 128,
388 .htotal = 800 + 40 + 128 + 88,
389 .vdisplay = 480,
390 .vsync_start = 480 + 10,
391 .vsync_end = 480 + 10 + 2,
392 .vtotal = 480 + 10 + 2 + 33,
393 .vrefresh = 60,
394 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
395};
396
397static const struct panel_desc edt_etm0700g0dh6 = {
398 .modes = &edt_etm0700g0dh6_mode,
399 .num_modes = 1,
400 .size = {
401 .width = 152,
402 .height = 91,
403 },
404};
405
406static const struct drm_display_mode lg_lp129qe_mode = {
407 .clock = 285250,
408 .hdisplay = 2560,
409 .hsync_start = 2560 + 48,
410 .hsync_end = 2560 + 48 + 32,
411 .htotal = 2560 + 48 + 32 + 80,
412 .vdisplay = 1700,
413 .vsync_start = 1700 + 3,
414 .vsync_end = 1700 + 3 + 10,
415 .vtotal = 1700 + 3 + 10 + 36,
416 .vrefresh = 60,
417};
418
419static const struct panel_desc lg_lp129qe = {
420 .modes = &lg_lp129qe_mode,
421 .num_modes = 1,
422 .size = {
423 .width = 272,
424 .height = 181,
425 },
426};
427
428static const struct drm_display_mode samsung_ltn101nt05_mode = {
429 .clock = 54030,
430 .hdisplay = 1024,
431 .hsync_start = 1024 + 24,
432 .hsync_end = 1024 + 24 + 136,
433 .htotal = 1024 + 24 + 136 + 160,
434 .vdisplay = 600,
435 .vsync_start = 600 + 3,
436 .vsync_end = 600 + 3 + 6,
437 .vtotal = 600 + 3 + 6 + 61,
438 .vrefresh = 60,
439};
440
441static const struct panel_desc samsung_ltn101nt05 = {
442 .modes = &samsung_ltn101nt05_mode,
443 .num_modes = 1,
444 .size = {
445 .width = 1024,
446 .height = 600,
447 },
448};
449
450static const struct of_device_id platform_of_match[] = {
451 {
452 .compatible = "auo,b101aw03",
453 .data = &auo_b101aw03,
454 }, {
455 .compatible = "auo,b133xtn01",
456 .data = &auo_b133xtn01,
457 }, {
458 .compatible = "chunghwa,claa101wa01a",
459 .data = &chunghwa_claa101wa01a
460 }, {
461 .compatible = "chunghwa,claa101wb01",
462 .data = &chunghwa_claa101wb01
463 }, {
464 .compatible = "edt,et057090dhu",
465 .data = &edt_et057090dhu,
466 }, {
467 .compatible = "edt,et070080dh6",
468 .data = &edt_etm0700g0dh6,
469 }, {
470 .compatible = "edt,etm0700g0dh6",
471 .data = &edt_etm0700g0dh6,
472 }, {
473 .compatible = "lg,lp129qe",
474 .data = &lg_lp129qe,
475 }, {
476 .compatible = "samsung,ltn101nt05",
477 .data = &samsung_ltn101nt05,
478 }, {
479 .compatible = "simple-panel",
480 }, {
481
482 }
483};
484MODULE_DEVICE_TABLE(of, platform_of_match);
485
486static int panel_simple_platform_probe(struct platform_device *pdev)
487{
488 const struct of_device_id *id;
489
490 id = of_match_node(platform_of_match, pdev->dev.of_node);
491 if (!id)
492 return -ENODEV;
493
494 return panel_simple_probe(&pdev->dev, id->data);
495}
496
497static int panel_simple_platform_remove(struct platform_device *pdev)
498{
499 return panel_simple_remove(&pdev->dev);
500}
501
502static void panel_simple_platform_shutdown(struct platform_device *pdev)
503{
504 panel_simple_shutdown(&pdev->dev);
505}
506
507static struct platform_driver panel_simple_platform_driver = {
508 .driver = {
509 .name = "panel-simple",
510 .owner = THIS_MODULE,
511 .of_match_table = platform_of_match,
512 },
513 .probe = panel_simple_platform_probe,
514 .remove = panel_simple_platform_remove,
515 .shutdown = panel_simple_platform_shutdown,
516};
517
518struct panel_desc_dsi {
519 struct panel_desc desc;
520
521 unsigned long flags;
522 enum mipi_dsi_pixel_format format;
523 unsigned int lanes;
524};
525
526static const struct drm_display_mode lg_ld070wx3_sl01_mode = {
527 .clock = 71000,
528 .hdisplay = 800,
529 .hsync_start = 800 + 32,
530 .hsync_end = 800 + 32 + 1,
531 .htotal = 800 + 32 + 1 + 57,
532 .vdisplay = 1280,
533 .vsync_start = 1280 + 28,
534 .vsync_end = 1280 + 28 + 1,
535 .vtotal = 1280 + 28 + 1 + 14,
536 .vrefresh = 60,
537};
538
539static const struct panel_desc_dsi lg_ld070wx3_sl01 = {
540 .desc = {
541 .modes = &lg_ld070wx3_sl01_mode,
542 .num_modes = 1,
543 .size = {
544 .width = 94,
545 .height = 151,
546 },
547 },
548 .flags = MIPI_DSI_MODE_VIDEO,
549 .format = MIPI_DSI_FMT_RGB888,
550 .lanes = 4,
551};
552
553static const struct drm_display_mode lg_lh500wx1_sd03_mode = {
554 .clock = 67000,
555 .hdisplay = 720,
556 .hsync_start = 720 + 12,
557 .hsync_end = 720 + 12 + 4,
558 .htotal = 720 + 12 + 4 + 112,
559 .vdisplay = 1280,
560 .vsync_start = 1280 + 8,
561 .vsync_end = 1280 + 8 + 4,
562 .vtotal = 1280 + 8 + 4 + 12,
563 .vrefresh = 60,
564};
565
566static const struct panel_desc_dsi lg_lh500wx1_sd03 = {
567 .desc = {
568 .modes = &lg_lh500wx1_sd03_mode,
569 .num_modes = 1,
570 .size = {
571 .width = 62,
572 .height = 110,
573 },
574 },
575 .flags = MIPI_DSI_MODE_VIDEO,
576 .format = MIPI_DSI_FMT_RGB888,
577 .lanes = 4,
578};
579
580static const struct drm_display_mode panasonic_vvx10f004b00_mode = {
581 .clock = 157200,
582 .hdisplay = 1920,
583 .hsync_start = 1920 + 154,
584 .hsync_end = 1920 + 154 + 16,
585 .htotal = 1920 + 154 + 16 + 32,
586 .vdisplay = 1200,
587 .vsync_start = 1200 + 17,
588 .vsync_end = 1200 + 17 + 2,
589 .vtotal = 1200 + 17 + 2 + 16,
590 .vrefresh = 60,
591};
592
593static const struct panel_desc_dsi panasonic_vvx10f004b00 = {
594 .desc = {
595 .modes = &panasonic_vvx10f004b00_mode,
596 .num_modes = 1,
597 .size = {
598 .width = 217,
599 .height = 136,
600 },
601 },
602 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
603 .format = MIPI_DSI_FMT_RGB888,
604 .lanes = 4,
605};
606
607static const struct of_device_id dsi_of_match[] = {
608 {
609 .compatible = "lg,ld070wx3-sl01",
610 .data = &lg_ld070wx3_sl01
611 }, {
612 .compatible = "lg,lh500wx1-sd03",
613 .data = &lg_lh500wx1_sd03
614 }, {
615 .compatible = "panasonic,vvx10f004b00",
616 .data = &panasonic_vvx10f004b00
617 }, {
618
619 }
620};
621MODULE_DEVICE_TABLE(of, dsi_of_match);
622
623static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
624{
625 const struct panel_desc_dsi *desc;
626 const struct of_device_id *id;
627 int err;
628
629 id = of_match_node(dsi_of_match, dsi->dev.of_node);
630 if (!id)
631 return -ENODEV;
632
633 desc = id->data;
634
635 err = panel_simple_probe(&dsi->dev, &desc->desc);
636 if (err < 0)
637 return err;
638
639 dsi->mode_flags = desc->flags;
640 dsi->format = desc->format;
641 dsi->lanes = desc->lanes;
642
643 return mipi_dsi_attach(dsi);
644}
645
646static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi)
647{
648 int err;
649
650 err = mipi_dsi_detach(dsi);
651 if (err < 0)
652 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
653
654 return panel_simple_remove(&dsi->dev);
655}
656
657static void panel_simple_dsi_shutdown(struct mipi_dsi_device *dsi)
658{
659 panel_simple_shutdown(&dsi->dev);
660}
661
662static struct mipi_dsi_driver panel_simple_dsi_driver = {
663 .driver = {
664 .name = "panel-simple-dsi",
665 .owner = THIS_MODULE,
666 .of_match_table = dsi_of_match,
667 },
668 .probe = panel_simple_dsi_probe,
669 .remove = panel_simple_dsi_remove,
670 .shutdown = panel_simple_dsi_shutdown,
671};
672
673static int __init panel_simple_init(void)
674{
675 int err;
676
677 err = platform_driver_register(&panel_simple_platform_driver);
678 if (err < 0)
679 return err;
680
681 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
682 err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
683 if (err < 0)
684 return err;
685 }
686
687 return 0;
688}
689module_init(panel_simple_init);
690
691static void __exit panel_simple_exit(void)
692{
693 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
694 mipi_dsi_driver_unregister(&panel_simple_dsi_driver);
695
696 platform_driver_unregister(&panel_simple_platform_driver);
697}
698module_exit(panel_simple_exit);
699
700MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
701MODULE_DESCRIPTION("DRM Driver for Simple Panels");
702MODULE_LICENSE("GPL and additional rights");
703
