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ee017238 WJ |
1 | /* |
2 | * Copyright (C) 2015 Red Hat | |
3 | * Copyright (C) 2015 Sony Mobile Communications Inc. | |
4 | * Author: Werner Johansson <werner.johansson@sonymobile.com> | |
5 | * | |
6 | * Based on AUO panel driver by Rob Clark <robdclark@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License version 2 as published by | |
10 | * the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
15 | * more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along with | |
18 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <linux/backlight.h> | |
22 | #include <linux/gpio/consumer.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/of.h> | |
25 | #include <linux/regulator/consumer.h> | |
26 | ||
27 | #include <drm/drmP.h> | |
28 | #include <drm/drm_crtc.h> | |
29 | #include <drm/drm_mipi_dsi.h> | |
30 | #include <drm/drm_panel.h> | |
31 | ||
32 | #include <video/mipi_display.h> | |
33 | ||
34 | struct sharp_nt_panel { | |
35 | struct drm_panel base; | |
36 | struct mipi_dsi_device *dsi; | |
37 | ||
38 | struct backlight_device *backlight; | |
39 | struct regulator *supply; | |
40 | struct gpio_desc *reset_gpio; | |
41 | ||
42 | bool prepared; | |
43 | bool enabled; | |
44 | ||
45 | const struct drm_display_mode *mode; | |
46 | }; | |
47 | ||
48 | static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel) | |
49 | { | |
50 | return container_of(panel, struct sharp_nt_panel, base); | |
51 | } | |
52 | ||
53 | static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt) | |
54 | { | |
55 | struct mipi_dsi_device *dsi = sharp_nt->dsi; | |
56 | int ret; | |
57 | ||
58 | dsi->mode_flags |= MIPI_DSI_MODE_LPM; | |
59 | ||
60 | ret = mipi_dsi_dcs_exit_sleep_mode(dsi); | |
61 | if (ret < 0) | |
62 | return ret; | |
63 | ||
64 | msleep(120); | |
65 | ||
66 | /* Novatek two-lane operation */ | |
67 | ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1); | |
68 | if (ret < 0) | |
69 | return ret; | |
70 | ||
71 | /* Set both MCU and RGB I/F to 24bpp */ | |
72 | ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT | | |
73 | (MIPI_DCS_PIXEL_FMT_24BIT << 4)); | |
74 | if (ret < 0) | |
75 | return ret; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt) | |
81 | { | |
82 | struct mipi_dsi_device *dsi = sharp_nt->dsi; | |
83 | int ret; | |
84 | ||
85 | dsi->mode_flags |= MIPI_DSI_MODE_LPM; | |
86 | ||
87 | ret = mipi_dsi_dcs_set_display_on(dsi); | |
88 | if (ret < 0) | |
89 | return ret; | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt) | |
95 | { | |
96 | struct mipi_dsi_device *dsi = sharp_nt->dsi; | |
97 | int ret; | |
98 | ||
99 | dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; | |
100 | ||
101 | ret = mipi_dsi_dcs_set_display_off(dsi); | |
102 | if (ret < 0) | |
103 | return ret; | |
104 | ||
105 | ret = mipi_dsi_dcs_enter_sleep_mode(dsi); | |
106 | if (ret < 0) | |
107 | return ret; | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | ||
113 | static int sharp_nt_panel_disable(struct drm_panel *panel) | |
114 | { | |
115 | struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel); | |
116 | ||
117 | if (!sharp_nt->enabled) | |
118 | return 0; | |
119 | ||
120 | if (sharp_nt->backlight) { | |
121 | sharp_nt->backlight->props.power = FB_BLANK_POWERDOWN; | |
122 | backlight_update_status(sharp_nt->backlight); | |
123 | } | |
124 | ||
125 | sharp_nt->enabled = false; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int sharp_nt_panel_unprepare(struct drm_panel *panel) | |
131 | { | |
132 | struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel); | |
133 | int ret; | |
134 | ||
135 | if (!sharp_nt->prepared) | |
136 | return 0; | |
137 | ||
138 | ret = sharp_nt_panel_off(sharp_nt); | |
139 | if (ret < 0) { | |
140 | dev_err(panel->dev, "failed to set panel off: %d\n", ret); | |
141 | return ret; | |
142 | } | |
143 | ||
144 | regulator_disable(sharp_nt->supply); | |
145 | if (sharp_nt->reset_gpio) | |
146 | gpiod_set_value(sharp_nt->reset_gpio, 0); | |
147 | ||
148 | sharp_nt->prepared = false; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int sharp_nt_panel_prepare(struct drm_panel *panel) | |
154 | { | |
155 | struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel); | |
156 | int ret; | |
157 | ||
158 | if (sharp_nt->prepared) | |
159 | return 0; | |
160 | ||
161 | ret = regulator_enable(sharp_nt->supply); | |
162 | if (ret < 0) | |
163 | return ret; | |
164 | ||
165 | msleep(20); | |
166 | ||
167 | if (sharp_nt->reset_gpio) { | |
168 | gpiod_set_value(sharp_nt->reset_gpio, 1); | |
169 | msleep(1); | |
170 | gpiod_set_value(sharp_nt->reset_gpio, 0); | |
171 | msleep(1); | |
172 | gpiod_set_value(sharp_nt->reset_gpio, 1); | |
173 | msleep(10); | |
174 | } | |
175 | ||
176 | ret = sharp_nt_panel_init(sharp_nt); | |
177 | if (ret < 0) { | |
178 | dev_err(panel->dev, "failed to init panel: %d\n", ret); | |
179 | goto poweroff; | |
180 | } | |
181 | ||
182 | ret = sharp_nt_panel_on(sharp_nt); | |
183 | if (ret < 0) { | |
184 | dev_err(panel->dev, "failed to set panel on: %d\n", ret); | |
185 | goto poweroff; | |
186 | } | |
187 | ||
188 | sharp_nt->prepared = true; | |
189 | ||
190 | return 0; | |
191 | ||
192 | poweroff: | |
193 | regulator_disable(sharp_nt->supply); | |
194 | if (sharp_nt->reset_gpio) | |
195 | gpiod_set_value(sharp_nt->reset_gpio, 0); | |
196 | return ret; | |
197 | } | |
198 | ||
199 | static int sharp_nt_panel_enable(struct drm_panel *panel) | |
200 | { | |
201 | struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel); | |
202 | ||
203 | if (sharp_nt->enabled) | |
204 | return 0; | |
205 | ||
206 | if (sharp_nt->backlight) { | |
207 | sharp_nt->backlight->props.power = FB_BLANK_UNBLANK; | |
208 | backlight_update_status(sharp_nt->backlight); | |
209 | } | |
210 | ||
211 | sharp_nt->enabled = true; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static const struct drm_display_mode default_mode = { | |
217 | .clock = 41118, | |
218 | .hdisplay = 540, | |
219 | .hsync_start = 540 + 48, | |
220 | .hsync_end = 540 + 48 + 80, | |
221 | .htotal = 540 + 48 + 80 + 32, | |
222 | .vdisplay = 960, | |
223 | .vsync_start = 960 + 3, | |
224 | .vsync_end = 960 + 3 + 15, | |
225 | .vtotal = 960 + 3 + 15 + 1, | |
226 | .vrefresh = 60, | |
227 | }; | |
228 | ||
229 | static int sharp_nt_panel_get_modes(struct drm_panel *panel) | |
230 | { | |
231 | struct drm_display_mode *mode; | |
232 | ||
233 | mode = drm_mode_duplicate(panel->drm, &default_mode); | |
234 | if (!mode) { | |
235 | dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n", | |
236 | default_mode.hdisplay, default_mode.vdisplay, | |
237 | default_mode.vrefresh); | |
238 | return -ENOMEM; | |
239 | } | |
240 | ||
241 | drm_mode_set_name(mode); | |
242 | ||
243 | drm_mode_probed_add(panel->connector, mode); | |
244 | ||
245 | panel->connector->display_info.width_mm = 54; | |
246 | panel->connector->display_info.height_mm = 95; | |
247 | ||
248 | return 1; | |
249 | } | |
250 | ||
251 | static const struct drm_panel_funcs sharp_nt_panel_funcs = { | |
252 | .disable = sharp_nt_panel_disable, | |
253 | .unprepare = sharp_nt_panel_unprepare, | |
254 | .prepare = sharp_nt_panel_prepare, | |
255 | .enable = sharp_nt_panel_enable, | |
256 | .get_modes = sharp_nt_panel_get_modes, | |
257 | }; | |
258 | ||
259 | static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt) | |
260 | { | |
261 | struct device *dev = &sharp_nt->dsi->dev; | |
262 | struct device_node *np; | |
263 | int ret; | |
264 | ||
265 | sharp_nt->mode = &default_mode; | |
266 | ||
267 | sharp_nt->supply = devm_regulator_get(dev, "avdd"); | |
268 | if (IS_ERR(sharp_nt->supply)) | |
269 | return PTR_ERR(sharp_nt->supply); | |
270 | ||
271 | sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); | |
272 | if (IS_ERR(sharp_nt->reset_gpio)) { | |
273 | dev_err(dev, "cannot get reset-gpios %ld\n", | |
274 | PTR_ERR(sharp_nt->reset_gpio)); | |
275 | sharp_nt->reset_gpio = NULL; | |
276 | } else { | |
277 | gpiod_set_value(sharp_nt->reset_gpio, 0); | |
278 | } | |
279 | ||
280 | np = of_parse_phandle(dev->of_node, "backlight", 0); | |
281 | if (np) { | |
282 | sharp_nt->backlight = of_find_backlight_by_node(np); | |
283 | of_node_put(np); | |
284 | ||
285 | if (!sharp_nt->backlight) | |
286 | return -EPROBE_DEFER; | |
287 | } | |
288 | ||
289 | drm_panel_init(&sharp_nt->base); | |
290 | sharp_nt->base.funcs = &sharp_nt_panel_funcs; | |
291 | sharp_nt->base.dev = &sharp_nt->dsi->dev; | |
292 | ||
293 | ret = drm_panel_add(&sharp_nt->base); | |
294 | if (ret < 0) | |
295 | goto put_backlight; | |
296 | ||
297 | return 0; | |
298 | ||
299 | put_backlight: | |
300 | if (sharp_nt->backlight) | |
301 | put_device(&sharp_nt->backlight->dev); | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt) | |
307 | { | |
308 | if (sharp_nt->base.dev) | |
309 | drm_panel_remove(&sharp_nt->base); | |
310 | ||
311 | if (sharp_nt->backlight) | |
312 | put_device(&sharp_nt->backlight->dev); | |
313 | } | |
314 | ||
315 | static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi) | |
316 | { | |
317 | struct sharp_nt_panel *sharp_nt; | |
318 | int ret; | |
319 | ||
320 | dsi->lanes = 2; | |
321 | dsi->format = MIPI_DSI_FMT_RGB888; | |
322 | dsi->mode_flags = MIPI_DSI_MODE_VIDEO | | |
323 | MIPI_DSI_MODE_VIDEO_HSE | | |
324 | MIPI_DSI_CLOCK_NON_CONTINUOUS | | |
325 | MIPI_DSI_MODE_EOT_PACKET; | |
326 | ||
327 | sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL); | |
328 | if (!sharp_nt) | |
329 | return -ENOMEM; | |
330 | ||
331 | mipi_dsi_set_drvdata(dsi, sharp_nt); | |
332 | ||
333 | sharp_nt->dsi = dsi; | |
334 | ||
335 | ret = sharp_nt_panel_add(sharp_nt); | |
336 | if (ret < 0) | |
337 | return ret; | |
338 | ||
339 | return mipi_dsi_attach(dsi); | |
340 | } | |
341 | ||
342 | static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi) | |
343 | { | |
344 | struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi); | |
345 | int ret; | |
346 | ||
347 | ret = sharp_nt_panel_disable(&sharp_nt->base); | |
348 | if (ret < 0) | |
349 | dev_err(&dsi->dev, "failed to disable panel: %d\n", ret); | |
350 | ||
351 | ret = mipi_dsi_detach(dsi); | |
352 | if (ret < 0) | |
353 | dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret); | |
354 | ||
355 | drm_panel_detach(&sharp_nt->base); | |
356 | sharp_nt_panel_del(sharp_nt); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi) | |
362 | { | |
363 | struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi); | |
364 | ||
365 | sharp_nt_panel_disable(&sharp_nt->base); | |
366 | } | |
367 | ||
368 | static const struct of_device_id sharp_nt_of_match[] = { | |
369 | { .compatible = "sharp,ls043t1le01-qhd", }, | |
370 | { } | |
371 | }; | |
372 | MODULE_DEVICE_TABLE(of, sharp_nt_of_match); | |
373 | ||
374 | static struct mipi_dsi_driver sharp_nt_panel_driver = { | |
375 | .driver = { | |
376 | .name = "panel-sharp-ls043t1le01-qhd", | |
377 | .of_match_table = sharp_nt_of_match, | |
378 | }, | |
379 | .probe = sharp_nt_panel_probe, | |
380 | .remove = sharp_nt_panel_remove, | |
381 | .shutdown = sharp_nt_panel_shutdown, | |
382 | }; | |
383 | module_mipi_dsi_driver(sharp_nt_panel_driver); | |
384 | ||
385 | MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>"); | |
386 | MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver"); | |
387 | MODULE_LICENSE("GPL v2"); |