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1/*
2 * Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
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 /* probe EDID if a DDC bus is available */
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 /* add hard-coded panel modes */
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 const struct drm_display_mode auo_b101aw03_mode = {
266 .clock = 51450,
267 .hdisplay = 1024,
268 .hsync_start = 1024 + 156,
269 .hsync_end = 1024 + 156 + 8,
270 .htotal = 1024 + 156 + 8 + 156,
271 .vdisplay = 600,
272 .vsync_start = 600 + 16,
273 .vsync_end = 600 + 16 + 6,
274 .vtotal = 600 + 16 + 6 + 16,
275 .vrefresh = 60,
276};
277
278static const struct panel_desc auo_b101aw03 = {
279 .modes = &auo_b101aw03_mode,
280 .num_modes = 1,
281 .size = {
282 .width = 223,
283 .height = 125,
284 },
285};
286
287static const struct drm_display_mode chunghwa_claa101wa01a_mode = {
288 .clock = 72070,
289 .hdisplay = 1366,
290 .hsync_start = 1366 + 58,
291 .hsync_end = 1366 + 58 + 58,
292 .htotal = 1366 + 58 + 58 + 58,
293 .vdisplay = 768,
294 .vsync_start = 768 + 4,
295 .vsync_end = 768 + 4 + 4,
296 .vtotal = 768 + 4 + 4 + 4,
297 .vrefresh = 60,
298};
299
300static const struct panel_desc chunghwa_claa101wa01a = {
301 .modes = &chunghwa_claa101wa01a_mode,
302 .num_modes = 1,
303 .size = {
304 .width = 220,
305 .height = 120,
306 },
307};
308
309static const struct drm_display_mode chunghwa_claa101wb01_mode = {
310 .clock = 69300,
311 .hdisplay = 1366,
312 .hsync_start = 1366 + 48,
313 .hsync_end = 1366 + 48 + 32,
314 .htotal = 1366 + 48 + 32 + 20,
315 .vdisplay = 768,
316 .vsync_start = 768 + 16,
317 .vsync_end = 768 + 16 + 8,
318 .vtotal = 768 + 16 + 8 + 16,
319 .vrefresh = 60,
320};
321
322static const struct panel_desc chunghwa_claa101wb01 = {
323 .modes = &chunghwa_claa101wb01_mode,
324 .num_modes = 1,
325 .size = {
326 .width = 223,
327 .height = 125,
328 },
329};
330
331static const struct drm_display_mode lg_lp129qe_mode = {
332 .clock = 285250,
333 .hdisplay = 2560,
334 .hsync_start = 2560 + 48,
335 .hsync_end = 2560 + 48 + 32,
336 .htotal = 2560 + 48 + 32 + 80,
337 .vdisplay = 1700,
338 .vsync_start = 1700 + 3,
339 .vsync_end = 1700 + 3 + 10,
340 .vtotal = 1700 + 3 + 10 + 36,
341 .vrefresh = 60,
342};
343
344static const struct panel_desc lg_lp129qe = {
345 .modes = &lg_lp129qe_mode,
346 .num_modes = 1,
347 .size = {
348 .width = 272,
349 .height = 181,
350 },
351};
352
353static const struct drm_display_mode samsung_ltn101nt05_mode = {
354 .clock = 54030,
355 .hdisplay = 1024,
356 .hsync_start = 1024 + 24,
357 .hsync_end = 1024 + 24 + 136,
358 .htotal = 1024 + 24 + 136 + 160,
359 .vdisplay = 600,
360 .vsync_start = 600 + 3,
361 .vsync_end = 600 + 3 + 6,
362 .vtotal = 600 + 3 + 6 + 61,
363 .vrefresh = 60,
364};
365
366static const struct panel_desc samsung_ltn101nt05 = {
367 .modes = &samsung_ltn101nt05_mode,
368 .num_modes = 1,
369 .size = {
370 .width = 1024,
371 .height = 600,
372 },
373};
374
375static const struct of_device_id platform_of_match[] = {
376 {
377 .compatible = "auo,b101aw03",
378 .data = &auo_b101aw03,
379 }, {
380 .compatible = "chunghwa,claa101wa01a",
381 .data = &chunghwa_claa101wa01a
382 }, {
383 .compatible = "chunghwa,claa101wb01",
384 .data = &chunghwa_claa101wb01
385 }, {
386 .compatible = "lg,lp129qe",
387 .data = &lg_lp129qe,
388 }, {
389 .compatible = "samsung,ltn101nt05",
390 .data = &samsung_ltn101nt05,
391 }, {
392 .compatible = "simple-panel",
393 }, {
394 /* sentinel */
395 }
396};
397MODULE_DEVICE_TABLE(of, platform_of_match);
398
399static int panel_simple_platform_probe(struct platform_device *pdev)
400{
401 const struct of_device_id *id;
402
403 id = of_match_node(platform_of_match, pdev->dev.of_node);
404 if (!id)
405 return -ENODEV;
406
407 return panel_simple_probe(&pdev->dev, id->data);
408}
409
410static int panel_simple_platform_remove(struct platform_device *pdev)
411{
412 return panel_simple_remove(&pdev->dev);
413}
414
415static struct platform_driver panel_simple_platform_driver = {
416 .driver = {
417 .name = "panel-simple",
418 .owner = THIS_MODULE,
419 .of_match_table = platform_of_match,
420 },
421 .probe = panel_simple_platform_probe,
422 .remove = panel_simple_platform_remove,
423};
424
425struct panel_desc_dsi {
426 struct panel_desc desc;
427
428 unsigned long flags;
429 enum mipi_dsi_pixel_format format;
430 unsigned int lanes;
431};
432
433static const struct drm_display_mode lg_ld070wx3_sl01_mode = {
434 .clock = 71000,
435 .hdisplay = 800,
436 .hsync_start = 800 + 32,
437 .hsync_end = 800 + 32 + 1,
438 .htotal = 800 + 32 + 1 + 57,
439 .vdisplay = 1280,
440 .vsync_start = 1280 + 28,
441 .vsync_end = 1280 + 28 + 1,
442 .vtotal = 1280 + 28 + 1 + 14,
443 .vrefresh = 60,
444};
445
446static const struct panel_desc_dsi lg_ld070wx3_sl01 = {
447 .desc = {
448 .modes = &lg_ld070wx3_sl01_mode,
449 .num_modes = 1,
450 .size = {
451 .width = 94,
452 .height = 151,
453 },
454 },
455 .flags = MIPI_DSI_MODE_VIDEO,
456 .format = MIPI_DSI_FMT_RGB888,
457 .lanes = 4,
458};
459
460static const struct drm_display_mode lg_lh500wx1_sd03_mode = {
461 .clock = 67000,
462 .hdisplay = 720,
463 .hsync_start = 720 + 12,
464 .hsync_end = 720 + 12 + 4,
465 .htotal = 720 + 12 + 4 + 112,
466 .vdisplay = 1280,
467 .vsync_start = 1280 + 8,
468 .vsync_end = 1280 + 8 + 4,
469 .vtotal = 1280 + 8 + 4 + 12,
470 .vrefresh = 60,
471};
472
473static const struct panel_desc_dsi lg_lh500wx1_sd03 = {
474 .desc = {
475 .modes = &lg_lh500wx1_sd03_mode,
476 .num_modes = 1,
477 .size = {
478 .width = 62,
479 .height = 110,
480 },
481 },
482 .flags = MIPI_DSI_MODE_VIDEO,
483 .format = MIPI_DSI_FMT_RGB888,
484 .lanes = 4,
485};
486
487static const struct drm_display_mode panasonic_vvx10f004b00_mode = {
488 .clock = 157200,
489 .hdisplay = 1920,
490 .hsync_start = 1920 + 154,
491 .hsync_end = 1920 + 154 + 16,
492 .htotal = 1920 + 154 + 16 + 32,
493 .vdisplay = 1200,
494 .vsync_start = 1200 + 17,
495 .vsync_end = 1200 + 17 + 2,
496 .vtotal = 1200 + 17 + 2 + 16,
497 .vrefresh = 60,
498};
499
500static const struct panel_desc_dsi panasonic_vvx10f004b00 = {
501 .desc = {
502 .modes = &panasonic_vvx10f004b00_mode,
503 .num_modes = 1,
504 .size = {
505 .width = 217,
506 .height = 136,
507 },
508 },
509 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
510 .format = MIPI_DSI_FMT_RGB888,
511 .lanes = 4,
512};
513
514static const struct of_device_id dsi_of_match[] = {
515 {
516 .compatible = "lg,ld070wx3-sl01",
517 .data = &lg_ld070wx3_sl01
518 }, {
519 .compatible = "lg,lh500wx1-sd03",
520 .data = &lg_lh500wx1_sd03
521 }, {
522 .compatible = "panasonic,vvx10f004b00",
523 .data = &panasonic_vvx10f004b00
524 }, {
525 /* sentinel */
526 }
527};
528MODULE_DEVICE_TABLE(of, dsi_of_match);
529
530static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
531{
532 const struct panel_desc_dsi *desc;
533 const struct of_device_id *id;
534 int err;
535
536 id = of_match_node(dsi_of_match, dsi->dev.of_node);
537 if (!id)
538 return -ENODEV;
539
540 desc = id->data;
541
542 err = panel_simple_probe(&dsi->dev, &desc->desc);
543 if (err < 0)
544 return err;
545
546 dsi->mode_flags = desc->flags;
547 dsi->format = desc->format;
548 dsi->lanes = desc->lanes;
549
550 return mipi_dsi_attach(dsi);
551}
552
553static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi)
554{
555 int err;
556
557 err = mipi_dsi_detach(dsi);
558 if (err < 0)
559 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
560
561 return panel_simple_remove(&dsi->dev);
562}
563
564static struct mipi_dsi_driver panel_simple_dsi_driver = {
565 .driver = {
566 .name = "panel-simple-dsi",
567 .owner = THIS_MODULE,
568 .of_match_table = dsi_of_match,
569 },
570 .probe = panel_simple_dsi_probe,
571 .remove = panel_simple_dsi_remove,
572};
573
574static int __init panel_simple_init(void)
575{
576 int err;
577
578 err = platform_driver_register(&panel_simple_platform_driver);
579 if (err < 0)
580 return err;
581
582 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
583 err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
584 if (err < 0)
585 return err;
586 }
587
588 return 0;
589}
590module_init(panel_simple_init);
591
592static void __exit panel_simple_exit(void)
593{
594 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
595 mipi_dsi_driver_unregister(&panel_simple_dsi_driver);
596
597 platform_driver_unregister(&panel_simple_platform_driver);
598}
599module_exit(panel_simple_exit);
600
601MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
602MODULE_DESCRIPTION("DRM Driver for Simple Panels");
603MODULE_LICENSE("GPL and additional rights");