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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2016 InforceComputing
4 * Author: Vinay Simha BN <simhavcs@gmail.com>
5 *
6 * Copyright (C) 2016 Linaro Ltd
7 * Author: Sumit Semwal <sumit.semwal@linaro.org>
8 *
9 * From internet archives, the panel for Nexus 7 2nd Gen, 2013 model is a
10 * JDI model LT070ME05000, and its data sheet is at:
11 * http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet
12 */
13
14#include <linux/backlight.h>
15#include <linux/delay.h>
16#include <linux/gpio/consumer.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/regulator/consumer.h>
20
21#include <video/mipi_display.h>
22
23#include <drm/drm_crtc.h>
24#include <drm/drm_mipi_dsi.h>
25#include <drm/drm_modes.h>
26#include <drm/drm_panel.h>
27
28static const char * const regulator_names[] = {
29 "vddp",
30 "iovcc"
31};
32
33struct jdi_panel {
34 struct drm_panel base;
35 struct mipi_dsi_device *dsi;
36
37 struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
38
39 struct gpio_desc *enable_gpio;
40 struct gpio_desc *reset_gpio;
41 struct gpio_desc *dcdc_en_gpio;
42 struct backlight_device *backlight;
43
44 bool prepared;
45 bool enabled;
46
47 const struct drm_display_mode *mode;
48};
49
50static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel)
51{
52 return container_of(panel, struct jdi_panel, base);
53}
54
55static int jdi_panel_init(struct jdi_panel *jdi)
56{
57 struct mipi_dsi_device *dsi = jdi->dsi;
58 struct device *dev = &jdi->dsi->dev;
59 int ret;
60
61 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
62
63 ret = mipi_dsi_dcs_soft_reset(dsi);
64 if (ret < 0)
65 return ret;
66
67 usleep_range(10000, 20000);
68
69 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);
70 if (ret < 0) {
71 dev_err(dev, "failed to set pixel format: %d\n", ret);
72 return ret;
73 }
74
75 ret = mipi_dsi_dcs_set_column_address(dsi, 0, jdi->mode->hdisplay - 1);
76 if (ret < 0) {
77 dev_err(dev, "failed to set column address: %d\n", ret);
78 return ret;
79 }
80
81 ret = mipi_dsi_dcs_set_page_address(dsi, 0, jdi->mode->vdisplay - 1);
82 if (ret < 0) {
83 dev_err(dev, "failed to set page address: %d\n", ret);
84 return ret;
85 }
86
87 /*
88 * BIT(5) BCTRL = 1 Backlight Control Block On, Brightness registers
89 * are active
90 * BIT(3) BL = 1 Backlight Control On
91 * BIT(2) DD = 0 Display Dimming is Off
92 */
93 ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
94 (u8[]){ 0x24 }, 1);
95 if (ret < 0) {
96 dev_err(dev, "failed to write control display: %d\n", ret);
97 return ret;
98 }
99
100 /* CABC off */
101 ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
102 (u8[]){ 0x00 }, 1);
103 if (ret < 0) {
104 dev_err(dev, "failed to set cabc off: %d\n", ret);
105 return ret;
106 }
107
108 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
109 if (ret < 0) {
110 dev_err(dev, "failed to set exit sleep mode: %d\n", ret);
111 return ret;
112 }
113
114 msleep(120);
115
116 ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2);
117 if (ret < 0) {
118 dev_err(dev, "failed to set mcap: %d\n", ret);
119 return ret;
120 }
121
122 mdelay(10);
123
124 /* Interface setting, video mode */
125 ret = mipi_dsi_generic_write(dsi, (u8[])
126 {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6);
127 if (ret < 0) {
128 dev_err(dev, "failed to set display interface setting: %d\n"
129 , ret);
130 return ret;
131 }
132
133 mdelay(20);
134
135 ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2);
136 if (ret < 0) {
137 dev_err(dev, "failed to set default values for mcap: %d\n"
138 , ret);
139 return ret;
140 }
141
142 return 0;
143}
144
145static int jdi_panel_on(struct jdi_panel *jdi)
146{
147 struct mipi_dsi_device *dsi = jdi->dsi;
148 struct device *dev = &jdi->dsi->dev;
149 int ret;
150
151 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
152
153 ret = mipi_dsi_dcs_set_display_on(dsi);
154 if (ret < 0)
155 dev_err(dev, "failed to set display on: %d\n", ret);
156
157 return ret;
158}
159
160static void jdi_panel_off(struct jdi_panel *jdi)
161{
162 struct mipi_dsi_device *dsi = jdi->dsi;
163 struct device *dev = &jdi->dsi->dev;
164 int ret;
165
166 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
167
168 ret = mipi_dsi_dcs_set_display_off(dsi);
169 if (ret < 0)
170 dev_err(dev, "failed to set display off: %d\n", ret);
171
172 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
173 if (ret < 0)
174 dev_err(dev, "failed to enter sleep mode: %d\n", ret);
175
176 msleep(100);
177}
178
179static int jdi_panel_disable(struct drm_panel *panel)
180{
181 struct jdi_panel *jdi = to_jdi_panel(panel);
182
183 if (!jdi->enabled)
184 return 0;
185
186 backlight_disable(jdi->backlight);
187
188 jdi->enabled = false;
189
190 return 0;
191}
192
193static int jdi_panel_unprepare(struct drm_panel *panel)
194{
195 struct jdi_panel *jdi = to_jdi_panel(panel);
196 struct device *dev = &jdi->dsi->dev;
197 int ret;
198
199 if (!jdi->prepared)
200 return 0;
201
202 jdi_panel_off(jdi);
203
204 ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
205 if (ret < 0)
206 dev_err(dev, "regulator disable failed, %d\n", ret);
207
208 gpiod_set_value(jdi->enable_gpio, 0);
209
210 gpiod_set_value(jdi->reset_gpio, 1);
211
212 gpiod_set_value(jdi->dcdc_en_gpio, 0);
213
214 jdi->prepared = false;
215
216 return 0;
217}
218
219static int jdi_panel_prepare(struct drm_panel *panel)
220{
221 struct jdi_panel *jdi = to_jdi_panel(panel);
222 struct device *dev = &jdi->dsi->dev;
223 int ret;
224
225 if (jdi->prepared)
226 return 0;
227
228 ret = regulator_bulk_enable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
229 if (ret < 0) {
230 dev_err(dev, "regulator enable failed, %d\n", ret);
231 return ret;
232 }
233
234 msleep(20);
235
236 gpiod_set_value(jdi->dcdc_en_gpio, 1);
237 usleep_range(10, 20);
238
239 gpiod_set_value(jdi->reset_gpio, 0);
240 usleep_range(10, 20);
241
242 gpiod_set_value(jdi->enable_gpio, 1);
243 usleep_range(10, 20);
244
245 ret = jdi_panel_init(jdi);
246 if (ret < 0) {
247 dev_err(dev, "failed to init panel: %d\n", ret);
248 goto poweroff;
249 }
250
251 ret = jdi_panel_on(jdi);
252 if (ret < 0) {
253 dev_err(dev, "failed to set panel on: %d\n", ret);
254 goto poweroff;
255 }
256
257 jdi->prepared = true;
258
259 return 0;
260
261poweroff:
262 ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
263 if (ret < 0)
264 dev_err(dev, "regulator disable failed, %d\n", ret);
265
266 gpiod_set_value(jdi->enable_gpio, 0);
267
268 gpiod_set_value(jdi->reset_gpio, 1);
269
270 gpiod_set_value(jdi->dcdc_en_gpio, 0);
271
272 return ret;
273}
274
275static int jdi_panel_enable(struct drm_panel *panel)
276{
277 struct jdi_panel *jdi = to_jdi_panel(panel);
278
279 if (jdi->enabled)
280 return 0;
281
282 backlight_enable(jdi->backlight);
283
284 jdi->enabled = true;
285
286 return 0;
287}
288
289static const struct drm_display_mode default_mode = {
290 .clock = 155493,
291 .hdisplay = 1200,
292 .hsync_start = 1200 + 48,
293 .hsync_end = 1200 + 48 + 32,
294 .htotal = 1200 + 48 + 32 + 60,
295 .vdisplay = 1920,
296 .vsync_start = 1920 + 3,
297 .vsync_end = 1920 + 3 + 5,
298 .vtotal = 1920 + 3 + 5 + 6,
299 .vrefresh = 60,
300 .flags = 0,
301};
302
303static int jdi_panel_get_modes(struct drm_panel *panel)
304{
305 struct drm_display_mode *mode;
306 struct jdi_panel *jdi = to_jdi_panel(panel);
307 struct device *dev = &jdi->dsi->dev;
308
309 mode = drm_mode_duplicate(panel->drm, &default_mode);
310 if (!mode) {
311 dev_err(dev, "failed to add mode %ux%ux@%u\n",
312 default_mode.hdisplay, default_mode.vdisplay,
313 default_mode.vrefresh);
314 return -ENOMEM;
315 }
316
317 drm_mode_set_name(mode);
318
319 drm_mode_probed_add(panel->connector, mode);
320
321 panel->connector->display_info.width_mm = 95;
322 panel->connector->display_info.height_mm = 151;
323
324 return 1;
325}
326
327static int dsi_dcs_bl_get_brightness(struct backlight_device *bl)
328{
329 struct mipi_dsi_device *dsi = bl_get_data(bl);
330 int ret;
331 u16 brightness = bl->props.brightness;
332
333 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
334
335 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
336 if (ret < 0)
337 return ret;
338
339 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
340
341 return brightness & 0xff;
342}
343
344static int dsi_dcs_bl_update_status(struct backlight_device *bl)
345{
346 struct mipi_dsi_device *dsi = bl_get_data(bl);
347 int ret;
348
349 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
350
351 ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
352 if (ret < 0)
353 return ret;
354
355 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
356
357 return 0;
358}
359
360static const struct backlight_ops dsi_bl_ops = {
361 .update_status = dsi_dcs_bl_update_status,
362 .get_brightness = dsi_dcs_bl_get_brightness,
363};
364
365static struct backlight_device *
366drm_panel_create_dsi_backlight(struct mipi_dsi_device *dsi)
367{
368 struct device *dev = &dsi->dev;
369 struct backlight_properties props;
370
371 memset(&props, 0, sizeof(props));
372 props.type = BACKLIGHT_RAW;
373 props.brightness = 255;
374 props.max_brightness = 255;
375
376 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
377 &dsi_bl_ops, &props);
378}
379
380static const struct drm_panel_funcs jdi_panel_funcs = {
381 .disable = jdi_panel_disable,
382 .unprepare = jdi_panel_unprepare,
383 .prepare = jdi_panel_prepare,
384 .enable = jdi_panel_enable,
385 .get_modes = jdi_panel_get_modes,
386};
387
388static const struct of_device_id jdi_of_match[] = {
389 { .compatible = "jdi,lt070me05000", },
390 { }
391};
392MODULE_DEVICE_TABLE(of, jdi_of_match);
393
394static int jdi_panel_add(struct jdi_panel *jdi)
395{
396 struct device *dev = &jdi->dsi->dev;
397 int ret;
398 unsigned int i;
399
400 jdi->mode = &default_mode;
401
402 for (i = 0; i < ARRAY_SIZE(jdi->supplies); i++)
403 jdi->supplies[i].supply = regulator_names[i];
404
405 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies),
406 jdi->supplies);
407 if (ret < 0) {
408 dev_err(dev, "failed to init regulator, ret=%d\n", ret);
409 return ret;
410 }
411
412 jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
413 if (IS_ERR(jdi->enable_gpio)) {
414 ret = PTR_ERR(jdi->enable_gpio);
415 dev_err(dev, "cannot get enable-gpio %d\n", ret);
416 return ret;
417 }
418
419 jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
420 if (IS_ERR(jdi->reset_gpio)) {
421 ret = PTR_ERR(jdi->reset_gpio);
422 dev_err(dev, "cannot get reset-gpios %d\n", ret);
423 return ret;
424 }
425
426 jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);
427 if (IS_ERR(jdi->dcdc_en_gpio)) {
428 ret = PTR_ERR(jdi->dcdc_en_gpio);
429 dev_err(dev, "cannot get dcdc-en-gpio %d\n", ret);
430 return ret;
431 }
432
433 jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
434 if (IS_ERR(jdi->backlight)) {
435 ret = PTR_ERR(jdi->backlight);
436 dev_err(dev, "failed to register backlight %d\n", ret);
437 return ret;
438 }
439
440 drm_panel_init(&jdi->base);
441 jdi->base.funcs = &jdi_panel_funcs;
442 jdi->base.dev = &jdi->dsi->dev;
443
444 ret = drm_panel_add(&jdi->base);
445
446 return ret;
447}
448
449static void jdi_panel_del(struct jdi_panel *jdi)
450{
451 if (jdi->base.dev)
452 drm_panel_remove(&jdi->base);
453}
454
455static int jdi_panel_probe(struct mipi_dsi_device *dsi)
456{
457 struct jdi_panel *jdi;
458 int ret;
459
460 dsi->lanes = 4;
461 dsi->format = MIPI_DSI_FMT_RGB888;
462 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
463 MIPI_DSI_CLOCK_NON_CONTINUOUS;
464
465 jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
466 if (!jdi)
467 return -ENOMEM;
468
469 mipi_dsi_set_drvdata(dsi, jdi);
470
471 jdi->dsi = dsi;
472
473 ret = jdi_panel_add(jdi);
474 if (ret < 0)
475 return ret;
476
477 return mipi_dsi_attach(dsi);
478}
479
480static int jdi_panel_remove(struct mipi_dsi_device *dsi)
481{
482 struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
483 int ret;
484
485 ret = jdi_panel_disable(&jdi->base);
486 if (ret < 0)
487 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
488
489 ret = mipi_dsi_detach(dsi);
490 if (ret < 0)
491 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
492 ret);
493
494 jdi_panel_del(jdi);
495
496 return 0;
497}
498
499static void jdi_panel_shutdown(struct mipi_dsi_device *dsi)
500{
501 struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
502
503 jdi_panel_disable(&jdi->base);
504}
505
506static struct mipi_dsi_driver jdi_panel_driver = {
507 .driver = {
508 .name = "panel-jdi-lt070me05000",
509 .of_match_table = jdi_of_match,
510 },
511 .probe = jdi_panel_probe,
512 .remove = jdi_panel_remove,
513 .shutdown = jdi_panel_shutdown,
514};
515module_mipi_dsi_driver(jdi_panel_driver);
516
517MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>");
518MODULE_AUTHOR("Vinay Simha BN <simhavcs@gmail.com>");
519MODULE_DESCRIPTION("JDI LT070ME05000 WUXGA");
520MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2016 InforceComputing
4 * Author: Vinay Simha BN <simhavcs@gmail.com>
5 *
6 * Copyright (C) 2016 Linaro Ltd
7 * Author: Sumit Semwal <sumit.semwal@linaro.org>
8 */
9
10#include <linux/backlight.h>
11#include <linux/delay.h>
12#include <linux/gpio/consumer.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/regulator/consumer.h>
16
17#include <video/mipi_display.h>
18
19#include <drm/drm_crtc.h>
20#include <drm/drm_mipi_dsi.h>
21#include <drm/drm_modes.h>
22#include <drm/drm_panel.h>
23
24static const char * const regulator_names[] = {
25 "vddp",
26 "iovcc"
27};
28
29struct jdi_panel {
30 struct drm_panel base;
31 struct mipi_dsi_device *dsi;
32
33 struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
34
35 struct gpio_desc *enable_gpio;
36 struct gpio_desc *reset_gpio;
37 struct gpio_desc *dcdc_en_gpio;
38 struct backlight_device *backlight;
39
40 bool prepared;
41 bool enabled;
42
43 const struct drm_display_mode *mode;
44};
45
46static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel)
47{
48 return container_of(panel, struct jdi_panel, base);
49}
50
51static int jdi_panel_init(struct jdi_panel *jdi)
52{
53 struct mipi_dsi_device *dsi = jdi->dsi;
54 struct device *dev = &jdi->dsi->dev;
55 int ret;
56
57 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
58
59 ret = mipi_dsi_dcs_soft_reset(dsi);
60 if (ret < 0)
61 return ret;
62
63 usleep_range(10000, 20000);
64
65 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);
66 if (ret < 0) {
67 dev_err(dev, "failed to set pixel format: %d\n", ret);
68 return ret;
69 }
70
71 ret = mipi_dsi_dcs_set_column_address(dsi, 0, jdi->mode->hdisplay - 1);
72 if (ret < 0) {
73 dev_err(dev, "failed to set column address: %d\n", ret);
74 return ret;
75 }
76
77 ret = mipi_dsi_dcs_set_page_address(dsi, 0, jdi->mode->vdisplay - 1);
78 if (ret < 0) {
79 dev_err(dev, "failed to set page address: %d\n", ret);
80 return ret;
81 }
82
83 /*
84 * BIT(5) BCTRL = 1 Backlight Control Block On, Brightness registers
85 * are active
86 * BIT(3) BL = 1 Backlight Control On
87 * BIT(2) DD = 0 Display Dimming is Off
88 */
89 ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
90 (u8[]){ 0x24 }, 1);
91 if (ret < 0) {
92 dev_err(dev, "failed to write control display: %d\n", ret);
93 return ret;
94 }
95
96 /* CABC off */
97 ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
98 (u8[]){ 0x00 }, 1);
99 if (ret < 0) {
100 dev_err(dev, "failed to set cabc off: %d\n", ret);
101 return ret;
102 }
103
104 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
105 if (ret < 0) {
106 dev_err(dev, "failed to set exit sleep mode: %d\n", ret);
107 return ret;
108 }
109
110 msleep(120);
111
112 ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2);
113 if (ret < 0) {
114 dev_err(dev, "failed to set mcap: %d\n", ret);
115 return ret;
116 }
117
118 mdelay(10);
119
120 /* Interface setting, video mode */
121 ret = mipi_dsi_generic_write(dsi, (u8[])
122 {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6);
123 if (ret < 0) {
124 dev_err(dev, "failed to set display interface setting: %d\n"
125 , ret);
126 return ret;
127 }
128
129 mdelay(20);
130
131 ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2);
132 if (ret < 0) {
133 dev_err(dev, "failed to set default values for mcap: %d\n"
134 , ret);
135 return ret;
136 }
137
138 return 0;
139}
140
141static int jdi_panel_on(struct jdi_panel *jdi)
142{
143 struct mipi_dsi_device *dsi = jdi->dsi;
144 struct device *dev = &jdi->dsi->dev;
145 int ret;
146
147 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
148
149 ret = mipi_dsi_dcs_set_display_on(dsi);
150 if (ret < 0)
151 dev_err(dev, "failed to set display on: %d\n", ret);
152
153 return ret;
154}
155
156static void jdi_panel_off(struct jdi_panel *jdi)
157{
158 struct mipi_dsi_device *dsi = jdi->dsi;
159 struct device *dev = &jdi->dsi->dev;
160 int ret;
161
162 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
163
164 ret = mipi_dsi_dcs_set_display_off(dsi);
165 if (ret < 0)
166 dev_err(dev, "failed to set display off: %d\n", ret);
167
168 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
169 if (ret < 0)
170 dev_err(dev, "failed to enter sleep mode: %d\n", ret);
171
172 msleep(100);
173}
174
175static int jdi_panel_disable(struct drm_panel *panel)
176{
177 struct jdi_panel *jdi = to_jdi_panel(panel);
178
179 if (!jdi->enabled)
180 return 0;
181
182 backlight_disable(jdi->backlight);
183
184 jdi->enabled = false;
185
186 return 0;
187}
188
189static int jdi_panel_unprepare(struct drm_panel *panel)
190{
191 struct jdi_panel *jdi = to_jdi_panel(panel);
192 struct device *dev = &jdi->dsi->dev;
193 int ret;
194
195 if (!jdi->prepared)
196 return 0;
197
198 jdi_panel_off(jdi);
199
200 ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
201 if (ret < 0)
202 dev_err(dev, "regulator disable failed, %d\n", ret);
203
204 gpiod_set_value(jdi->enable_gpio, 0);
205
206 gpiod_set_value(jdi->reset_gpio, 1);
207
208 gpiod_set_value(jdi->dcdc_en_gpio, 0);
209
210 jdi->prepared = false;
211
212 return 0;
213}
214
215static int jdi_panel_prepare(struct drm_panel *panel)
216{
217 struct jdi_panel *jdi = to_jdi_panel(panel);
218 struct device *dev = &jdi->dsi->dev;
219 int ret;
220
221 if (jdi->prepared)
222 return 0;
223
224 ret = regulator_bulk_enable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
225 if (ret < 0) {
226 dev_err(dev, "regulator enable failed, %d\n", ret);
227 return ret;
228 }
229
230 msleep(20);
231
232 gpiod_set_value(jdi->dcdc_en_gpio, 1);
233 usleep_range(10, 20);
234
235 gpiod_set_value(jdi->reset_gpio, 0);
236 usleep_range(10, 20);
237
238 gpiod_set_value(jdi->enable_gpio, 1);
239 usleep_range(10, 20);
240
241 ret = jdi_panel_init(jdi);
242 if (ret < 0) {
243 dev_err(dev, "failed to init panel: %d\n", ret);
244 goto poweroff;
245 }
246
247 ret = jdi_panel_on(jdi);
248 if (ret < 0) {
249 dev_err(dev, "failed to set panel on: %d\n", ret);
250 goto poweroff;
251 }
252
253 jdi->prepared = true;
254
255 return 0;
256
257poweroff:
258 ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies);
259 if (ret < 0)
260 dev_err(dev, "regulator disable failed, %d\n", ret);
261
262 gpiod_set_value(jdi->enable_gpio, 0);
263
264 gpiod_set_value(jdi->reset_gpio, 1);
265
266 gpiod_set_value(jdi->dcdc_en_gpio, 0);
267
268 return ret;
269}
270
271static int jdi_panel_enable(struct drm_panel *panel)
272{
273 struct jdi_panel *jdi = to_jdi_panel(panel);
274
275 if (jdi->enabled)
276 return 0;
277
278 backlight_enable(jdi->backlight);
279
280 jdi->enabled = true;
281
282 return 0;
283}
284
285static const struct drm_display_mode default_mode = {
286 .clock = 155493,
287 .hdisplay = 1200,
288 .hsync_start = 1200 + 48,
289 .hsync_end = 1200 + 48 + 32,
290 .htotal = 1200 + 48 + 32 + 60,
291 .vdisplay = 1920,
292 .vsync_start = 1920 + 3,
293 .vsync_end = 1920 + 3 + 5,
294 .vtotal = 1920 + 3 + 5 + 6,
295 .flags = 0,
296};
297
298static int jdi_panel_get_modes(struct drm_panel *panel,
299 struct drm_connector *connector)
300{
301 struct drm_display_mode *mode;
302 struct jdi_panel *jdi = to_jdi_panel(panel);
303 struct device *dev = &jdi->dsi->dev;
304
305 mode = drm_mode_duplicate(connector->dev, &default_mode);
306 if (!mode) {
307 dev_err(dev, "failed to add mode %ux%ux@%u\n",
308 default_mode.hdisplay, default_mode.vdisplay,
309 drm_mode_vrefresh(&default_mode));
310 return -ENOMEM;
311 }
312
313 drm_mode_set_name(mode);
314
315 drm_mode_probed_add(connector, mode);
316
317 connector->display_info.width_mm = 95;
318 connector->display_info.height_mm = 151;
319
320 return 1;
321}
322
323static int dsi_dcs_bl_get_brightness(struct backlight_device *bl)
324{
325 struct mipi_dsi_device *dsi = bl_get_data(bl);
326 int ret;
327 u16 brightness = bl->props.brightness;
328
329 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
330
331 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
332 if (ret < 0)
333 return ret;
334
335 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
336
337 return brightness & 0xff;
338}
339
340static int dsi_dcs_bl_update_status(struct backlight_device *bl)
341{
342 struct mipi_dsi_device *dsi = bl_get_data(bl);
343 int ret;
344
345 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
346
347 ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
348 if (ret < 0)
349 return ret;
350
351 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
352
353 return 0;
354}
355
356static const struct backlight_ops dsi_bl_ops = {
357 .update_status = dsi_dcs_bl_update_status,
358 .get_brightness = dsi_dcs_bl_get_brightness,
359};
360
361static struct backlight_device *
362drm_panel_create_dsi_backlight(struct mipi_dsi_device *dsi)
363{
364 struct device *dev = &dsi->dev;
365 struct backlight_properties props;
366
367 memset(&props, 0, sizeof(props));
368 props.type = BACKLIGHT_RAW;
369 props.brightness = 255;
370 props.max_brightness = 255;
371
372 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
373 &dsi_bl_ops, &props);
374}
375
376static const struct drm_panel_funcs jdi_panel_funcs = {
377 .disable = jdi_panel_disable,
378 .unprepare = jdi_panel_unprepare,
379 .prepare = jdi_panel_prepare,
380 .enable = jdi_panel_enable,
381 .get_modes = jdi_panel_get_modes,
382};
383
384static const struct of_device_id jdi_of_match[] = {
385 { .compatible = "jdi,lt070me05000", },
386 { }
387};
388MODULE_DEVICE_TABLE(of, jdi_of_match);
389
390static int jdi_panel_add(struct jdi_panel *jdi)
391{
392 struct device *dev = &jdi->dsi->dev;
393 int ret;
394 unsigned int i;
395
396 jdi->mode = &default_mode;
397
398 for (i = 0; i < ARRAY_SIZE(jdi->supplies); i++)
399 jdi->supplies[i].supply = regulator_names[i];
400
401 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies),
402 jdi->supplies);
403 if (ret < 0)
404 return dev_err_probe(dev, ret,
405 "failed to init regulator, ret=%d\n", ret);
406
407 jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
408 if (IS_ERR(jdi->enable_gpio)) {
409 return dev_err_probe(dev, PTR_ERR(jdi->enable_gpio),
410 "cannot get enable-gpio %d\n", ret);
411 }
412
413 jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
414 if (IS_ERR(jdi->reset_gpio))
415 return dev_err_probe(dev, PTR_ERR(jdi->reset_gpio),
416 "cannot get reset-gpios %d\n", ret);
417
418 jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);
419 if (IS_ERR(jdi->dcdc_en_gpio))
420 return dev_err_probe(dev, PTR_ERR(jdi->dcdc_en_gpio),
421 "cannot get dcdc-en-gpio %d\n", ret);
422
423 jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
424 if (IS_ERR(jdi->backlight))
425 return dev_err_probe(dev, PTR_ERR(jdi->backlight),
426 "failed to register backlight %d\n", ret);
427
428 drm_panel_init(&jdi->base, &jdi->dsi->dev, &jdi_panel_funcs,
429 DRM_MODE_CONNECTOR_DSI);
430
431 drm_panel_add(&jdi->base);
432
433 return 0;
434}
435
436static void jdi_panel_del(struct jdi_panel *jdi)
437{
438 if (jdi->base.dev)
439 drm_panel_remove(&jdi->base);
440}
441
442static int jdi_panel_probe(struct mipi_dsi_device *dsi)
443{
444 struct jdi_panel *jdi;
445 int ret;
446
447 dsi->lanes = 4;
448 dsi->format = MIPI_DSI_FMT_RGB888;
449 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
450 MIPI_DSI_CLOCK_NON_CONTINUOUS;
451
452 jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
453 if (!jdi)
454 return -ENOMEM;
455
456 mipi_dsi_set_drvdata(dsi, jdi);
457
458 jdi->dsi = dsi;
459
460 ret = jdi_panel_add(jdi);
461 if (ret < 0)
462 return ret;
463
464 ret = mipi_dsi_attach(dsi);
465 if (ret < 0) {
466 jdi_panel_del(jdi);
467 return ret;
468 }
469
470 return 0;
471}
472
473static void jdi_panel_remove(struct mipi_dsi_device *dsi)
474{
475 struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
476 int ret;
477
478 ret = jdi_panel_disable(&jdi->base);
479 if (ret < 0)
480 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
481
482 ret = mipi_dsi_detach(dsi);
483 if (ret < 0)
484 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
485 ret);
486
487 jdi_panel_del(jdi);
488}
489
490static void jdi_panel_shutdown(struct mipi_dsi_device *dsi)
491{
492 struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
493
494 jdi_panel_disable(&jdi->base);
495}
496
497static struct mipi_dsi_driver jdi_panel_driver = {
498 .driver = {
499 .name = "panel-jdi-lt070me05000",
500 .of_match_table = jdi_of_match,
501 },
502 .probe = jdi_panel_probe,
503 .remove = jdi_panel_remove,
504 .shutdown = jdi_panel_shutdown,
505};
506module_mipi_dsi_driver(jdi_panel_driver);
507
508MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>");
509MODULE_AUTHOR("Vinay Simha BN <simhavcs@gmail.com>");
510MODULE_DESCRIPTION("JDI LT070ME05000 WUXGA");
511MODULE_LICENSE("GPL v2");