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280921de TR |
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.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/of_gpio.h> | |
28 | #include <linux/of_platform.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/regulator/consumer.h> | |
31 | ||
32 | #include <drm/drmP.h> | |
33 | #include <drm/drm_crtc.h> | |
210fcd9d | 34 | #include <drm/drm_mipi_dsi.h> |
280921de TR |
35 | #include <drm/drm_panel.h> |
36 | ||
37 | struct panel_desc { | |
38 | const struct drm_display_mode *modes; | |
39 | unsigned int num_modes; | |
40 | ||
41 | struct { | |
42 | unsigned int width; | |
43 | unsigned int height; | |
44 | } size; | |
45 | }; | |
46 | ||
47 | /* TODO: convert to gpiod_*() API once it's been merged */ | |
48 | #define GPIO_ACTIVE_LOW (1 << 0) | |
49 | ||
50 | struct panel_simple { | |
51 | struct drm_panel base; | |
52 | bool enabled; | |
53 | ||
54 | const struct panel_desc *desc; | |
55 | ||
56 | struct backlight_device *backlight; | |
57 | struct regulator *supply; | |
58 | struct i2c_adapter *ddc; | |
59 | ||
60 | unsigned long enable_gpio_flags; | |
61 | int enable_gpio; | |
62 | }; | |
63 | ||
64 | static inline struct panel_simple *to_panel_simple(struct drm_panel *panel) | |
65 | { | |
66 | return container_of(panel, struct panel_simple, base); | |
67 | } | |
68 | ||
69 | static int panel_simple_get_fixed_modes(struct panel_simple *panel) | |
70 | { | |
71 | struct drm_connector *connector = panel->base.connector; | |
72 | struct drm_device *drm = panel->base.drm; | |
73 | struct drm_display_mode *mode; | |
74 | unsigned int i, num = 0; | |
75 | ||
76 | if (!panel->desc) | |
77 | return 0; | |
78 | ||
79 | for (i = 0; i < panel->desc->num_modes; i++) { | |
80 | const struct drm_display_mode *m = &panel->desc->modes[i]; | |
81 | ||
82 | mode = drm_mode_duplicate(drm, m); | |
83 | if (!mode) { | |
84 | dev_err(drm->dev, "failed to add mode %ux%u@%u\n", | |
85 | m->hdisplay, m->vdisplay, m->vrefresh); | |
86 | continue; | |
87 | } | |
88 | ||
89 | drm_mode_set_name(mode); | |
90 | ||
91 | drm_mode_probed_add(connector, mode); | |
92 | num++; | |
93 | } | |
94 | ||
95 | connector->display_info.width_mm = panel->desc->size.width; | |
96 | connector->display_info.height_mm = panel->desc->size.height; | |
97 | ||
98 | return num; | |
99 | } | |
100 | ||
101 | static int panel_simple_disable(struct drm_panel *panel) | |
102 | { | |
103 | struct panel_simple *p = to_panel_simple(panel); | |
104 | ||
105 | if (!p->enabled) | |
106 | return 0; | |
107 | ||
108 | if (p->backlight) { | |
109 | p->backlight->props.power = FB_BLANK_POWERDOWN; | |
110 | backlight_update_status(p->backlight); | |
111 | } | |
112 | ||
113 | if (gpio_is_valid(p->enable_gpio)) { | |
114 | if (p->enable_gpio_flags & GPIO_ACTIVE_LOW) | |
115 | gpio_set_value(p->enable_gpio, 1); | |
116 | else | |
117 | gpio_set_value(p->enable_gpio, 0); | |
118 | } | |
119 | ||
120 | regulator_disable(p->supply); | |
121 | p->enabled = false; | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static int panel_simple_enable(struct drm_panel *panel) | |
127 | { | |
128 | struct panel_simple *p = to_panel_simple(panel); | |
129 | int err; | |
130 | ||
131 | if (p->enabled) | |
132 | return 0; | |
133 | ||
134 | err = regulator_enable(p->supply); | |
135 | if (err < 0) { | |
136 | dev_err(panel->dev, "failed to enable supply: %d\n", err); | |
137 | return err; | |
138 | } | |
139 | ||
140 | if (gpio_is_valid(p->enable_gpio)) { | |
141 | if (p->enable_gpio_flags & GPIO_ACTIVE_LOW) | |
142 | gpio_set_value(p->enable_gpio, 0); | |
143 | else | |
144 | gpio_set_value(p->enable_gpio, 1); | |
145 | } | |
146 | ||
147 | if (p->backlight) { | |
148 | p->backlight->props.power = FB_BLANK_UNBLANK; | |
149 | backlight_update_status(p->backlight); | |
150 | } | |
151 | ||
152 | p->enabled = true; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static int panel_simple_get_modes(struct drm_panel *panel) | |
158 | { | |
159 | struct panel_simple *p = to_panel_simple(panel); | |
160 | int num = 0; | |
161 | ||
162 | /* probe EDID if a DDC bus is available */ | |
163 | if (p->ddc) { | |
164 | struct edid *edid = drm_get_edid(panel->connector, p->ddc); | |
165 | if (edid) { | |
166 | num += drm_add_edid_modes(panel->connector, edid); | |
167 | kfree(edid); | |
168 | } | |
169 | } | |
170 | ||
171 | /* add hard-coded panel modes */ | |
172 | num += panel_simple_get_fixed_modes(p); | |
173 | ||
174 | return num; | |
175 | } | |
176 | ||
177 | static const struct drm_panel_funcs panel_simple_funcs = { | |
178 | .disable = panel_simple_disable, | |
179 | .enable = panel_simple_enable, | |
180 | .get_modes = panel_simple_get_modes, | |
181 | }; | |
182 | ||
183 | static int panel_simple_probe(struct device *dev, const struct panel_desc *desc) | |
184 | { | |
185 | struct device_node *backlight, *ddc; | |
186 | struct panel_simple *panel; | |
187 | enum of_gpio_flags flags; | |
188 | int err; | |
189 | ||
190 | panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL); | |
191 | if (!panel) | |
192 | return -ENOMEM; | |
193 | ||
194 | panel->enabled = false; | |
195 | panel->desc = desc; | |
196 | ||
197 | panel->supply = devm_regulator_get(dev, "power"); | |
198 | if (IS_ERR(panel->supply)) | |
199 | return PTR_ERR(panel->supply); | |
200 | ||
201 | panel->enable_gpio = of_get_named_gpio_flags(dev->of_node, | |
202 | "enable-gpios", 0, | |
203 | &flags); | |
204 | if (gpio_is_valid(panel->enable_gpio)) { | |
205 | unsigned int value; | |
206 | ||
207 | if (flags & OF_GPIO_ACTIVE_LOW) | |
208 | panel->enable_gpio_flags |= GPIO_ACTIVE_LOW; | |
209 | ||
210 | err = gpio_request(panel->enable_gpio, "enable"); | |
211 | if (err < 0) { | |
212 | dev_err(dev, "failed to request GPIO#%u: %d\n", | |
213 | panel->enable_gpio, err); | |
214 | return err; | |
215 | } | |
216 | ||
217 | value = (panel->enable_gpio_flags & GPIO_ACTIVE_LOW) != 0; | |
218 | ||
219 | err = gpio_direction_output(panel->enable_gpio, value); | |
220 | if (err < 0) { | |
221 | dev_err(dev, "failed to setup GPIO%u: %d\n", | |
222 | panel->enable_gpio, err); | |
223 | goto free_gpio; | |
224 | } | |
225 | } | |
226 | ||
227 | backlight = of_parse_phandle(dev->of_node, "backlight", 0); | |
228 | if (backlight) { | |
229 | panel->backlight = of_find_backlight_by_node(backlight); | |
230 | of_node_put(backlight); | |
231 | ||
232 | if (!panel->backlight) { | |
233 | err = -EPROBE_DEFER; | |
234 | goto free_gpio; | |
235 | } | |
236 | } | |
237 | ||
238 | ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); | |
239 | if (ddc) { | |
240 | panel->ddc = of_find_i2c_adapter_by_node(ddc); | |
241 | of_node_put(ddc); | |
242 | ||
243 | if (!panel->ddc) { | |
244 | err = -EPROBE_DEFER; | |
245 | goto free_backlight; | |
246 | } | |
247 | } | |
248 | ||
249 | drm_panel_init(&panel->base); | |
250 | panel->base.dev = dev; | |
251 | panel->base.funcs = &panel_simple_funcs; | |
252 | ||
253 | err = drm_panel_add(&panel->base); | |
254 | if (err < 0) | |
255 | goto free_ddc; | |
256 | ||
257 | dev_set_drvdata(dev, panel); | |
258 | ||
259 | return 0; | |
260 | ||
261 | free_ddc: | |
262 | if (panel->ddc) | |
263 | put_device(&panel->ddc->dev); | |
264 | free_backlight: | |
265 | if (panel->backlight) | |
266 | put_device(&panel->backlight->dev); | |
267 | free_gpio: | |
268 | if (gpio_is_valid(panel->enable_gpio)) | |
269 | gpio_free(panel->enable_gpio); | |
270 | ||
271 | return err; | |
272 | } | |
273 | ||
274 | static int panel_simple_remove(struct device *dev) | |
275 | { | |
276 | struct panel_simple *panel = dev_get_drvdata(dev); | |
277 | ||
278 | drm_panel_detach(&panel->base); | |
279 | drm_panel_remove(&panel->base); | |
280 | ||
281 | panel_simple_disable(&panel->base); | |
282 | ||
283 | if (panel->ddc) | |
284 | put_device(&panel->ddc->dev); | |
285 | ||
286 | if (panel->backlight) | |
287 | put_device(&panel->backlight->dev); | |
288 | ||
289 | if (gpio_is_valid(panel->enable_gpio)) | |
290 | gpio_free(panel->enable_gpio); | |
291 | ||
292 | regulator_disable(panel->supply); | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static const struct drm_display_mode auo_b101aw03_mode = { | |
298 | .clock = 51450, | |
299 | .hdisplay = 1024, | |
300 | .hsync_start = 1024 + 156, | |
301 | .hsync_end = 1024 + 156 + 8, | |
302 | .htotal = 1024 + 156 + 8 + 156, | |
303 | .vdisplay = 600, | |
304 | .vsync_start = 600 + 16, | |
305 | .vsync_end = 600 + 16 + 6, | |
306 | .vtotal = 600 + 16 + 6 + 16, | |
307 | .vrefresh = 60, | |
308 | }; | |
309 | ||
310 | static const struct panel_desc auo_b101aw03 = { | |
311 | .modes = &auo_b101aw03_mode, | |
312 | .num_modes = 1, | |
313 | .size = { | |
314 | .width = 223, | |
315 | .height = 125, | |
316 | }, | |
317 | }; | |
318 | ||
319 | static const struct drm_display_mode chunghwa_claa101wb01_mode = { | |
320 | .clock = 69300, | |
321 | .hdisplay = 1366, | |
322 | .hsync_start = 1366 + 48, | |
323 | .hsync_end = 1366 + 48 + 32, | |
324 | .htotal = 1366 + 48 + 32 + 20, | |
325 | .vdisplay = 768, | |
326 | .vsync_start = 768 + 16, | |
327 | .vsync_end = 768 + 16 + 8, | |
328 | .vtotal = 768 + 16 + 8 + 16, | |
329 | .vrefresh = 60, | |
330 | }; | |
331 | ||
332 | static const struct panel_desc chunghwa_claa101wb01 = { | |
333 | .modes = &chunghwa_claa101wb01_mode, | |
334 | .num_modes = 1, | |
335 | .size = { | |
336 | .width = 223, | |
337 | .height = 125, | |
338 | }, | |
339 | }; | |
340 | ||
341 | static const struct of_device_id platform_of_match[] = { | |
342 | { | |
343 | .compatible = "auo,b101aw03", | |
344 | .data = &auo_b101aw03, | |
345 | }, { | |
346 | .compatible = "chunghwa,claa101wb01", | |
347 | .data = &chunghwa_claa101wb01 | |
348 | }, { | |
349 | .compatible = "simple-panel", | |
350 | }, { | |
351 | /* sentinel */ | |
352 | } | |
353 | }; | |
354 | MODULE_DEVICE_TABLE(of, platform_of_match); | |
355 | ||
356 | static int panel_simple_platform_probe(struct platform_device *pdev) | |
357 | { | |
358 | const struct of_device_id *id; | |
359 | ||
360 | id = of_match_node(platform_of_match, pdev->dev.of_node); | |
361 | if (!id) | |
362 | return -ENODEV; | |
363 | ||
364 | return panel_simple_probe(&pdev->dev, id->data); | |
365 | } | |
366 | ||
367 | static int panel_simple_platform_remove(struct platform_device *pdev) | |
368 | { | |
369 | return panel_simple_remove(&pdev->dev); | |
370 | } | |
371 | ||
372 | static struct platform_driver panel_simple_platform_driver = { | |
373 | .driver = { | |
374 | .name = "panel-simple", | |
375 | .owner = THIS_MODULE, | |
376 | .of_match_table = platform_of_match, | |
377 | }, | |
378 | .probe = panel_simple_platform_probe, | |
379 | .remove = panel_simple_platform_remove, | |
380 | }; | |
381 | ||
210fcd9d TR |
382 | struct panel_desc_dsi { |
383 | struct panel_desc desc; | |
384 | ||
385 | enum mipi_dsi_pixel_format format; | |
386 | unsigned int lanes; | |
387 | }; | |
388 | ||
280921de TR |
389 | static const struct drm_display_mode panasonic_vvx10f004b00_mode = { |
390 | .clock = 157200, | |
391 | .hdisplay = 1920, | |
392 | .hsync_start = 1920 + 154, | |
393 | .hsync_end = 1920 + 154 + 16, | |
394 | .htotal = 1920 + 154 + 16 + 32, | |
395 | .vdisplay = 1200, | |
396 | .vsync_start = 1200 + 17, | |
397 | .vsync_end = 1200 + 17 + 2, | |
398 | .vtotal = 1200 + 17 + 2 + 16, | |
399 | .vrefresh = 60, | |
400 | }; | |
401 | ||
210fcd9d TR |
402 | static const struct panel_desc_dsi panasonic_vvx10f004b00 = { |
403 | .desc = { | |
404 | .modes = &panasonic_vvx10f004b00_mode, | |
405 | .num_modes = 1, | |
406 | .size = { | |
407 | .width = 217, | |
408 | .height = 136, | |
409 | }, | |
280921de | 410 | }, |
210fcd9d TR |
411 | .format = MIPI_DSI_FMT_RGB888, |
412 | .lanes = 4, | |
413 | }; | |
414 | ||
415 | static const struct of_device_id dsi_of_match[] = { | |
416 | { | |
417 | .compatible = "panasonic,vvx10f004b00", | |
418 | .data = &panasonic_vvx10f004b00 | |
419 | }, { | |
420 | /* sentinel */ | |
421 | } | |
422 | }; | |
423 | MODULE_DEVICE_TABLE(of, dsi_of_match); | |
424 | ||
425 | static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi) | |
426 | { | |
427 | const struct panel_desc_dsi *desc; | |
428 | const struct of_device_id *id; | |
429 | int err; | |
430 | ||
431 | id = of_match_node(dsi_of_match, dsi->dev.of_node); | |
432 | if (!id) | |
433 | return -ENODEV; | |
434 | ||
435 | desc = id->data; | |
436 | ||
437 | err = panel_simple_probe(&dsi->dev, &desc->desc); | |
438 | if (err < 0) | |
439 | return err; | |
440 | ||
441 | dsi->format = desc->format; | |
442 | dsi->lanes = desc->lanes; | |
443 | ||
444 | return mipi_dsi_attach(dsi); | |
445 | } | |
446 | ||
447 | static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi) | |
448 | { | |
449 | int err; | |
450 | ||
451 | err = mipi_dsi_detach(dsi); | |
452 | if (err < 0) | |
453 | dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); | |
454 | ||
455 | return panel_simple_remove(&dsi->dev); | |
456 | } | |
457 | ||
458 | static struct mipi_dsi_driver panel_simple_dsi_driver = { | |
459 | .driver = { | |
460 | .name = "panel-simple-dsi", | |
461 | .owner = THIS_MODULE, | |
462 | .of_match_table = dsi_of_match, | |
463 | }, | |
464 | .probe = panel_simple_dsi_probe, | |
465 | .remove = panel_simple_dsi_remove, | |
280921de TR |
466 | }; |
467 | ||
468 | static int __init panel_simple_init(void) | |
469 | { | |
210fcd9d TR |
470 | int err; |
471 | ||
472 | err = platform_driver_register(&panel_simple_platform_driver); | |
473 | if (err < 0) | |
474 | return err; | |
475 | ||
476 | if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) { | |
477 | err = mipi_dsi_driver_register(&panel_simple_dsi_driver); | |
478 | if (err < 0) | |
479 | return err; | |
480 | } | |
481 | ||
482 | return 0; | |
280921de TR |
483 | } |
484 | module_init(panel_simple_init); | |
485 | ||
486 | static void __exit panel_simple_exit(void) | |
487 | { | |
210fcd9d TR |
488 | if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) |
489 | mipi_dsi_driver_unregister(&panel_simple_dsi_driver); | |
490 | ||
280921de TR |
491 | platform_driver_unregister(&panel_simple_platform_driver); |
492 | } | |
493 | module_exit(panel_simple_exit); | |
494 | ||
495 | MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); | |
496 | MODULE_DESCRIPTION("DRM Driver for Simple Panels"); | |
497 | MODULE_LICENSE("GPL and additional rights"); |