1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd |
4 | */ |
5 | |
6 | #include <linux/delay.h> |
7 | #include <linux/gpio/consumer.h> |
8 | #include <linux/module.h> |
9 | #include <linux/of.h> |
10 | #include <linux/regulator/consumer.h> |
11 | |
12 | #include <video/mipi_display.h> |
13 | |
14 | #include <drm/drm_crtc.h> |
15 | #include <drm/drm_device.h> |
16 | #include <drm/drm_mipi_dsi.h> |
17 | #include <drm/drm_modes.h> |
18 | #include <drm/drm_panel.h> |
19 | |
20 | struct kingdisplay_panel { |
21 | struct drm_panel base; |
22 | struct mipi_dsi_device *link; |
23 | |
24 | struct regulator *supply; |
25 | struct gpio_desc *enable_gpio; |
26 | |
27 | bool prepared; |
28 | bool enabled; |
29 | }; |
30 | |
31 | struct kingdisplay_panel_cmd { |
32 | char cmd; |
33 | char data; |
34 | }; |
35 | |
36 | /* |
37 | * According to the discussion on |
38 | * https://review.coreboot.org/#/c/coreboot/+/22472/ |
39 | * the panel init array is not part of the panels datasheet but instead |
40 | * just came in this form from the panel vendor. |
41 | */ |
42 | static const struct kingdisplay_panel_cmd init_code[] = { |
43 | /* voltage setting */ |
44 | { 0xB0, 0x00 }, |
45 | { 0xB2, 0x02 }, |
46 | { 0xB3, 0x11 }, |
47 | { 0xB4, 0x00 }, |
48 | { 0xB6, 0x80 }, |
49 | /* VCOM disable */ |
50 | { 0xB7, 0x02 }, |
51 | { 0xB8, 0x80 }, |
52 | { 0xBA, 0x43 }, |
53 | /* VCOM setting */ |
54 | { 0xBB, 0x53 }, |
55 | /* VSP setting */ |
56 | { 0xBC, 0x0A }, |
57 | /* VSN setting */ |
58 | { 0xBD, 0x4A }, |
59 | /* VGH setting */ |
60 | { 0xBE, 0x2F }, |
61 | /* VGL setting */ |
62 | { 0xBF, 0x1A }, |
63 | { 0xF0, 0x39 }, |
64 | { 0xF1, 0x22 }, |
65 | /* Gamma setting */ |
66 | { 0xB0, 0x02 }, |
67 | { 0xC0, 0x00 }, |
68 | { 0xC1, 0x01 }, |
69 | { 0xC2, 0x0B }, |
70 | { 0xC3, 0x15 }, |
71 | { 0xC4, 0x22 }, |
72 | { 0xC5, 0x11 }, |
73 | { 0xC6, 0x15 }, |
74 | { 0xC7, 0x19 }, |
75 | { 0xC8, 0x1A }, |
76 | { 0xC9, 0x16 }, |
77 | { 0xCA, 0x18 }, |
78 | { 0xCB, 0x13 }, |
79 | { 0xCC, 0x18 }, |
80 | { 0xCD, 0x13 }, |
81 | { 0xCE, 0x1C }, |
82 | { 0xCF, 0x19 }, |
83 | { 0xD0, 0x21 }, |
84 | { 0xD1, 0x2C }, |
85 | { 0xD2, 0x2F }, |
86 | { 0xD3, 0x30 }, |
87 | { 0xD4, 0x19 }, |
88 | { 0xD5, 0x1F }, |
89 | { 0xD6, 0x00 }, |
90 | { 0xD7, 0x01 }, |
91 | { 0xD8, 0x0B }, |
92 | { 0xD9, 0x15 }, |
93 | { 0xDA, 0x22 }, |
94 | { 0xDB, 0x11 }, |
95 | { 0xDC, 0x15 }, |
96 | { 0xDD, 0x19 }, |
97 | { 0xDE, 0x1A }, |
98 | { 0xDF, 0x16 }, |
99 | { 0xE0, 0x18 }, |
100 | { 0xE1, 0x13 }, |
101 | { 0xE2, 0x18 }, |
102 | { 0xE3, 0x13 }, |
103 | { 0xE4, 0x1C }, |
104 | { 0xE5, 0x19 }, |
105 | { 0xE6, 0x21 }, |
106 | { 0xE7, 0x2C }, |
107 | { 0xE8, 0x2F }, |
108 | { 0xE9, 0x30 }, |
109 | { 0xEA, 0x19 }, |
110 | { 0xEB, 0x1F }, |
111 | /* GOA MUX setting */ |
112 | { 0xB0, 0x01 }, |
113 | { 0xC0, 0x10 }, |
114 | { 0xC1, 0x0F }, |
115 | { 0xC2, 0x0E }, |
116 | { 0xC3, 0x0D }, |
117 | { 0xC4, 0x0C }, |
118 | { 0xC5, 0x0B }, |
119 | { 0xC6, 0x0A }, |
120 | { 0xC7, 0x09 }, |
121 | { 0xC8, 0x08 }, |
122 | { 0xC9, 0x07 }, |
123 | { 0xCA, 0x06 }, |
124 | { 0xCB, 0x05 }, |
125 | { 0xCC, 0x00 }, |
126 | { 0xCD, 0x01 }, |
127 | { 0xCE, 0x02 }, |
128 | { 0xCF, 0x03 }, |
129 | { 0xD0, 0x04 }, |
130 | { 0xD6, 0x10 }, |
131 | { 0xD7, 0x0F }, |
132 | { 0xD8, 0x0E }, |
133 | { 0xD9, 0x0D }, |
134 | { 0xDA, 0x0C }, |
135 | { 0xDB, 0x0B }, |
136 | { 0xDC, 0x0A }, |
137 | { 0xDD, 0x09 }, |
138 | { 0xDE, 0x08 }, |
139 | { 0xDF, 0x07 }, |
140 | { 0xE0, 0x06 }, |
141 | { 0xE1, 0x05 }, |
142 | { 0xE2, 0x00 }, |
143 | { 0xE3, 0x01 }, |
144 | { 0xE4, 0x02 }, |
145 | { 0xE5, 0x03 }, |
146 | { 0xE6, 0x04 }, |
147 | { 0xE7, 0x00 }, |
148 | { 0xEC, 0xC0 }, |
149 | /* GOA timing setting */ |
150 | { 0xB0, 0x03 }, |
151 | { 0xC0, 0x01 }, |
152 | { 0xC2, 0x6F }, |
153 | { 0xC3, 0x6F }, |
154 | { 0xC5, 0x36 }, |
155 | { 0xC8, 0x08 }, |
156 | { 0xC9, 0x04 }, |
157 | { 0xCA, 0x41 }, |
158 | { 0xCC, 0x43 }, |
159 | { 0xCF, 0x60 }, |
160 | { 0xD2, 0x04 }, |
161 | { 0xD3, 0x04 }, |
162 | { 0xD4, 0x03 }, |
163 | { 0xD5, 0x02 }, |
164 | { 0xD6, 0x01 }, |
165 | { 0xD7, 0x00 }, |
166 | { 0xDB, 0x01 }, |
167 | { 0xDE, 0x36 }, |
168 | { 0xE6, 0x6F }, |
169 | { 0xE7, 0x6F }, |
170 | /* GOE setting */ |
171 | { 0xB0, 0x06 }, |
172 | { 0xB8, 0xA5 }, |
173 | { 0xC0, 0xA5 }, |
174 | { 0xD5, 0x3F }, |
175 | }; |
176 | |
177 | static inline |
178 | struct kingdisplay_panel *to_kingdisplay_panel(struct drm_panel *panel) |
179 | { |
180 | return container_of(panel, struct kingdisplay_panel, base); |
181 | } |
182 | |
183 | static int kingdisplay_panel_disable(struct drm_panel *panel) |
184 | { |
185 | struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel); |
186 | int err; |
187 | |
188 | if (!kingdisplay->enabled) |
189 | return 0; |
190 | |
191 | err = mipi_dsi_dcs_set_display_off(dsi: kingdisplay->link); |
192 | if (err < 0) |
193 | dev_err(panel->dev, "failed to set display off: %d\n" , err); |
194 | |
195 | kingdisplay->enabled = false; |
196 | |
197 | return 0; |
198 | } |
199 | |
200 | static int kingdisplay_panel_unprepare(struct drm_panel *panel) |
201 | { |
202 | struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel); |
203 | int err; |
204 | |
205 | if (!kingdisplay->prepared) |
206 | return 0; |
207 | |
208 | err = mipi_dsi_dcs_enter_sleep_mode(dsi: kingdisplay->link); |
209 | if (err < 0) { |
210 | dev_err(panel->dev, "failed to enter sleep mode: %d\n" , err); |
211 | return err; |
212 | } |
213 | |
214 | /* T15: 120ms */ |
215 | msleep(msecs: 120); |
216 | |
217 | gpiod_set_value_cansleep(desc: kingdisplay->enable_gpio, value: 0); |
218 | |
219 | err = regulator_disable(regulator: kingdisplay->supply); |
220 | if (err < 0) |
221 | return err; |
222 | |
223 | kingdisplay->prepared = false; |
224 | |
225 | return 0; |
226 | } |
227 | |
228 | static int kingdisplay_panel_prepare(struct drm_panel *panel) |
229 | { |
230 | struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel); |
231 | int err, regulator_err; |
232 | unsigned int i; |
233 | |
234 | if (kingdisplay->prepared) |
235 | return 0; |
236 | |
237 | gpiod_set_value_cansleep(desc: kingdisplay->enable_gpio, value: 0); |
238 | |
239 | err = regulator_enable(regulator: kingdisplay->supply); |
240 | if (err < 0) |
241 | return err; |
242 | |
243 | /* T2: 15ms */ |
244 | usleep_range(min: 15000, max: 16000); |
245 | |
246 | gpiod_set_value_cansleep(desc: kingdisplay->enable_gpio, value: 1); |
247 | |
248 | /* T4: 15ms */ |
249 | usleep_range(min: 15000, max: 16000); |
250 | |
251 | for (i = 0; i < ARRAY_SIZE(init_code); i++) { |
252 | err = mipi_dsi_generic_write(dsi: kingdisplay->link, payload: &init_code[i], |
253 | size: sizeof(struct kingdisplay_panel_cmd)); |
254 | if (err < 0) { |
255 | dev_err(panel->dev, "failed write init cmds: %d\n" , err); |
256 | goto poweroff; |
257 | } |
258 | } |
259 | |
260 | err = mipi_dsi_dcs_exit_sleep_mode(dsi: kingdisplay->link); |
261 | if (err < 0) { |
262 | dev_err(panel->dev, "failed to exit sleep mode: %d\n" , err); |
263 | goto poweroff; |
264 | } |
265 | |
266 | /* T6: 120ms */ |
267 | msleep(msecs: 120); |
268 | |
269 | err = mipi_dsi_dcs_set_display_on(dsi: kingdisplay->link); |
270 | if (err < 0) { |
271 | dev_err(panel->dev, "failed to set display on: %d\n" , err); |
272 | goto poweroff; |
273 | } |
274 | |
275 | /* T7: 10ms */ |
276 | usleep_range(min: 10000, max: 11000); |
277 | |
278 | kingdisplay->prepared = true; |
279 | |
280 | return 0; |
281 | |
282 | poweroff: |
283 | gpiod_set_value_cansleep(desc: kingdisplay->enable_gpio, value: 0); |
284 | |
285 | regulator_err = regulator_disable(regulator: kingdisplay->supply); |
286 | if (regulator_err) |
287 | dev_err(panel->dev, "failed to disable regulator: %d\n" , regulator_err); |
288 | |
289 | return err; |
290 | } |
291 | |
292 | static int kingdisplay_panel_enable(struct drm_panel *panel) |
293 | { |
294 | struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel); |
295 | |
296 | if (kingdisplay->enabled) |
297 | return 0; |
298 | |
299 | kingdisplay->enabled = true; |
300 | |
301 | return 0; |
302 | } |
303 | |
304 | static const struct drm_display_mode default_mode = { |
305 | .clock = 229000, |
306 | .hdisplay = 1536, |
307 | .hsync_start = 1536 + 100, |
308 | .hsync_end = 1536 + 100 + 24, |
309 | .htotal = 1536 + 100 + 24 + 100, |
310 | .vdisplay = 2048, |
311 | .vsync_start = 2048 + 95, |
312 | .vsync_end = 2048 + 95 + 2, |
313 | .vtotal = 2048 + 95 + 2 + 23, |
314 | }; |
315 | |
316 | static int kingdisplay_panel_get_modes(struct drm_panel *panel, |
317 | struct drm_connector *connector) |
318 | { |
319 | struct drm_display_mode *mode; |
320 | |
321 | mode = drm_mode_duplicate(dev: connector->dev, mode: &default_mode); |
322 | if (!mode) { |
323 | dev_err(panel->dev, "failed to add mode %ux%u@%u\n" , |
324 | default_mode.hdisplay, default_mode.vdisplay, |
325 | drm_mode_vrefresh(&default_mode)); |
326 | return -ENOMEM; |
327 | } |
328 | |
329 | drm_mode_set_name(mode); |
330 | |
331 | drm_mode_probed_add(connector, mode); |
332 | |
333 | connector->display_info.width_mm = 147; |
334 | connector->display_info.height_mm = 196; |
335 | connector->display_info.bpc = 8; |
336 | |
337 | return 1; |
338 | } |
339 | |
340 | static const struct drm_panel_funcs kingdisplay_panel_funcs = { |
341 | .disable = kingdisplay_panel_disable, |
342 | .unprepare = kingdisplay_panel_unprepare, |
343 | .prepare = kingdisplay_panel_prepare, |
344 | .enable = kingdisplay_panel_enable, |
345 | .get_modes = kingdisplay_panel_get_modes, |
346 | }; |
347 | |
348 | static const struct of_device_id kingdisplay_of_match[] = { |
349 | { .compatible = "kingdisplay,kd097d04" , }, |
350 | { } |
351 | }; |
352 | MODULE_DEVICE_TABLE(of, kingdisplay_of_match); |
353 | |
354 | static int kingdisplay_panel_add(struct kingdisplay_panel *kingdisplay) |
355 | { |
356 | struct device *dev = &kingdisplay->link->dev; |
357 | int err; |
358 | |
359 | kingdisplay->supply = devm_regulator_get(dev, id: "power" ); |
360 | if (IS_ERR(ptr: kingdisplay->supply)) |
361 | return PTR_ERR(ptr: kingdisplay->supply); |
362 | |
363 | kingdisplay->enable_gpio = devm_gpiod_get_optional(dev, con_id: "enable" , |
364 | flags: GPIOD_OUT_HIGH); |
365 | if (IS_ERR(ptr: kingdisplay->enable_gpio)) { |
366 | err = PTR_ERR(ptr: kingdisplay->enable_gpio); |
367 | dev_dbg(dev, "failed to get enable gpio: %d\n" , err); |
368 | kingdisplay->enable_gpio = NULL; |
369 | } |
370 | |
371 | drm_panel_init(panel: &kingdisplay->base, dev: &kingdisplay->link->dev, |
372 | funcs: &kingdisplay_panel_funcs, DRM_MODE_CONNECTOR_DSI); |
373 | |
374 | err = drm_panel_of_backlight(panel: &kingdisplay->base); |
375 | if (err) |
376 | return err; |
377 | |
378 | drm_panel_add(panel: &kingdisplay->base); |
379 | |
380 | return 0; |
381 | } |
382 | |
383 | static void kingdisplay_panel_del(struct kingdisplay_panel *kingdisplay) |
384 | { |
385 | drm_panel_remove(panel: &kingdisplay->base); |
386 | } |
387 | |
388 | static int kingdisplay_panel_probe(struct mipi_dsi_device *dsi) |
389 | { |
390 | struct kingdisplay_panel *kingdisplay; |
391 | int err; |
392 | |
393 | dsi->lanes = 4; |
394 | dsi->format = MIPI_DSI_FMT_RGB888; |
395 | dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | |
396 | MIPI_DSI_MODE_LPM; |
397 | |
398 | kingdisplay = devm_kzalloc(dev: &dsi->dev, size: sizeof(*kingdisplay), GFP_KERNEL); |
399 | if (!kingdisplay) |
400 | return -ENOMEM; |
401 | |
402 | mipi_dsi_set_drvdata(dsi, data: kingdisplay); |
403 | kingdisplay->link = dsi; |
404 | |
405 | err = kingdisplay_panel_add(kingdisplay); |
406 | if (err < 0) |
407 | return err; |
408 | |
409 | err = mipi_dsi_attach(dsi); |
410 | if (err < 0) { |
411 | kingdisplay_panel_del(kingdisplay); |
412 | return err; |
413 | } |
414 | |
415 | return 0; |
416 | } |
417 | |
418 | static void kingdisplay_panel_remove(struct mipi_dsi_device *dsi) |
419 | { |
420 | struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi); |
421 | int err; |
422 | |
423 | err = drm_panel_unprepare(panel: &kingdisplay->base); |
424 | if (err < 0) |
425 | dev_err(&dsi->dev, "failed to unprepare panel: %d\n" , err); |
426 | |
427 | err = drm_panel_disable(panel: &kingdisplay->base); |
428 | if (err < 0) |
429 | dev_err(&dsi->dev, "failed to disable panel: %d\n" , err); |
430 | |
431 | err = mipi_dsi_detach(dsi); |
432 | if (err < 0) |
433 | dev_err(&dsi->dev, "failed to detach from DSI host: %d\n" , err); |
434 | |
435 | kingdisplay_panel_del(kingdisplay); |
436 | } |
437 | |
438 | static void kingdisplay_panel_shutdown(struct mipi_dsi_device *dsi) |
439 | { |
440 | struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi); |
441 | |
442 | drm_panel_unprepare(panel: &kingdisplay->base); |
443 | drm_panel_disable(panel: &kingdisplay->base); |
444 | } |
445 | |
446 | static struct mipi_dsi_driver kingdisplay_panel_driver = { |
447 | .driver = { |
448 | .name = "panel-kingdisplay-kd097d04" , |
449 | .of_match_table = kingdisplay_of_match, |
450 | }, |
451 | .probe = kingdisplay_panel_probe, |
452 | .remove = kingdisplay_panel_remove, |
453 | .shutdown = kingdisplay_panel_shutdown, |
454 | }; |
455 | module_mipi_dsi_driver(kingdisplay_panel_driver); |
456 | |
457 | MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>" ); |
458 | MODULE_AUTHOR("Nickey Yang <nickey.yang@rock-chips.com>" ); |
459 | MODULE_DESCRIPTION("kingdisplay KD097D04 panel driver" ); |
460 | MODULE_LICENSE("GPL v2" ); |
461 | |