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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
20struct 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
31struct kingdisplay_panel_cmd {
32 char cmd;
33 char data;
34};
35
36
37
38
39
40
41
42static const struct kingdisplay_panel_cmd init_code[] = {
43
44 { 0xB0, 0x00 },
45 { 0xB2, 0x02 },
46 { 0xB3, 0x11 },
47 { 0xB4, 0x00 },
48 { 0xB6, 0x80 },
49
50 { 0xB7, 0x02 },
51 { 0xB8, 0x80 },
52 { 0xBA, 0x43 },
53
54 { 0xBB, 0x53 },
55
56 { 0xBC, 0x0A },
57
58 { 0xBD, 0x4A },
59
60 { 0xBE, 0x2F },
61
62 { 0xBF, 0x1A },
63 { 0xF0, 0x39 },
64 { 0xF1, 0x22 },
65
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
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
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
171 { 0xB0, 0x06 },
172 { 0xB8, 0xA5 },
173 { 0xC0, 0xA5 },
174 { 0xD5, 0x3F },
175};
176
177static inline
178struct kingdisplay_panel *to_kingdisplay_panel(struct drm_panel *panel)
179{
180 return container_of(panel, struct kingdisplay_panel, base);
181}
182
183static 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(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
200static 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(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
215 msleep(120);
216
217 gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
218
219 err = regulator_disable(kingdisplay->supply);
220 if (err < 0)
221 return err;
222
223 kingdisplay->prepared = false;
224
225 return 0;
226}
227
228static 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(kingdisplay->enable_gpio, 0);
238
239 err = regulator_enable(kingdisplay->supply);
240 if (err < 0)
241 return err;
242
243
244 usleep_range(15000, 16000);
245
246 gpiod_set_value_cansleep(kingdisplay->enable_gpio, 1);
247
248
249 usleep_range(15000, 16000);
250
251 for (i = 0; i < ARRAY_SIZE(init_code); i++) {
252 err = mipi_dsi_generic_write(kingdisplay->link, &init_code[i],
253 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(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
267 msleep(120);
268
269 err = mipi_dsi_dcs_set_display_on(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
276 usleep_range(10000, 11000);
277
278 kingdisplay->prepared = true;
279
280 return 0;
281
282poweroff:
283 gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
284
285 regulator_err = regulator_disable(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
292static 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
304static 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
316static 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(connector->dev, &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
340static 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
348static const struct of_device_id kingdisplay_of_match[] = {
349 { .compatible = "kingdisplay,kd097d04", },
350 { }
351};
352MODULE_DEVICE_TABLE(of, kingdisplay_of_match);
353
354static 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, "power");
360 if (IS_ERR(kingdisplay->supply))
361 return PTR_ERR(kingdisplay->supply);
362
363 kingdisplay->enable_gpio = devm_gpiod_get_optional(dev, "enable",
364 GPIOD_OUT_HIGH);
365 if (IS_ERR(kingdisplay->enable_gpio)) {
366 err = PTR_ERR(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(&kingdisplay->base, &kingdisplay->link->dev,
372 &kingdisplay_panel_funcs, DRM_MODE_CONNECTOR_DSI);
373
374 err = drm_panel_of_backlight(&kingdisplay->base);
375 if (err)
376 return err;
377
378 drm_panel_add(&kingdisplay->base);
379
380 return 0;
381}
382
383static void kingdisplay_panel_del(struct kingdisplay_panel *kingdisplay)
384{
385 drm_panel_remove(&kingdisplay->base);
386}
387
388static 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(&dsi->dev, sizeof(*kingdisplay), GFP_KERNEL);
399 if (!kingdisplay)
400 return -ENOMEM;
401
402 mipi_dsi_set_drvdata(dsi, kingdisplay);
403 kingdisplay->link = dsi;
404
405 err = kingdisplay_panel_add(kingdisplay);
406 if (err < 0)
407 return err;
408
409 return mipi_dsi_attach(dsi);
410}
411
412static int kingdisplay_panel_remove(struct mipi_dsi_device *dsi)
413{
414 struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi);
415 int err;
416
417 err = drm_panel_unprepare(&kingdisplay->base);
418 if (err < 0)
419 dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err);
420
421 err = drm_panel_disable(&kingdisplay->base);
422 if (err < 0)
423 dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
424
425 err = mipi_dsi_detach(dsi);
426 if (err < 0)
427 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
428
429 kingdisplay_panel_del(kingdisplay);
430
431 return 0;
432}
433
434static void kingdisplay_panel_shutdown(struct mipi_dsi_device *dsi)
435{
436 struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi);
437
438 drm_panel_unprepare(&kingdisplay->base);
439 drm_panel_disable(&kingdisplay->base);
440}
441
442static struct mipi_dsi_driver kingdisplay_panel_driver = {
443 .driver = {
444 .name = "panel-kingdisplay-kd097d04",
445 .of_match_table = kingdisplay_of_match,
446 },
447 .probe = kingdisplay_panel_probe,
448 .remove = kingdisplay_panel_remove,
449 .shutdown = kingdisplay_panel_shutdown,
450};
451module_mipi_dsi_driver(kingdisplay_panel_driver);
452
453MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
454MODULE_AUTHOR("Nickey Yang <nickey.yang@rock-chips.com>");
455MODULE_DESCRIPTION("kingdisplay KD097D04 panel driver");
456MODULE_LICENSE("GPL v2");
457
