1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2015 Red Hat
4 * Copyright (C) 2015 Sony Mobile Communications Inc.
5 * Author: Werner Johansson <werner.johansson@sonymobile.com>
6 *
7 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
8 */
9
10 #include <linux/delay.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/regulator/consumer.h>
15
16 #include <video/mipi_display.h>
17
18 #include <drm/drm_crtc.h>
19 #include <drm/drm_device.h>
20 #include <drm/drm_mipi_dsi.h>
21 #include <drm/drm_panel.h>
22
23 struct sharp_nt_panel {
24 struct drm_panel base;
25 struct mipi_dsi_device *dsi;
26
27 struct regulator *supply;
28 struct gpio_desc *reset_gpio;
29
30 bool prepared;
31 bool enabled;
32
33 const struct drm_display_mode *mode;
34 };
35
to_sharp_nt_panel(struct drm_panel * panel)36 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
37 {
38 return container_of(panel, struct sharp_nt_panel, base);
39 }
40
sharp_nt_panel_init(struct sharp_nt_panel * sharp_nt)41 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
42 {
43 struct mipi_dsi_device *dsi = sharp_nt->dsi;
44 int ret;
45
46 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
47
48 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
49 if (ret < 0)
50 return ret;
51
52 msleep(120);
53
54 /* Novatek two-lane operation */
55 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
56 if (ret < 0)
57 return ret;
58
59 /* Set both MCU and RGB I/F to 24bpp */
60 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
61 (MIPI_DCS_PIXEL_FMT_24BIT << 4));
62 if (ret < 0)
63 return ret;
64
65 return 0;
66 }
67
sharp_nt_panel_on(struct sharp_nt_panel * sharp_nt)68 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
69 {
70 struct mipi_dsi_device *dsi = sharp_nt->dsi;
71 int ret;
72
73 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
74
75 ret = mipi_dsi_dcs_set_display_on(dsi);
76 if (ret < 0)
77 return ret;
78
79 return 0;
80 }
81
sharp_nt_panel_off(struct sharp_nt_panel * sharp_nt)82 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
83 {
84 struct mipi_dsi_device *dsi = sharp_nt->dsi;
85 int ret;
86
87 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
88
89 ret = mipi_dsi_dcs_set_display_off(dsi);
90 if (ret < 0)
91 return ret;
92
93 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
94 if (ret < 0)
95 return ret;
96
97 return 0;
98 }
99
100
sharp_nt_panel_disable(struct drm_panel * panel)101 static int sharp_nt_panel_disable(struct drm_panel *panel)
102 {
103 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
104
105 if (!sharp_nt->enabled)
106 return 0;
107
108 sharp_nt->enabled = false;
109
110 return 0;
111 }
112
sharp_nt_panel_unprepare(struct drm_panel * panel)113 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
114 {
115 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
116 int ret;
117
118 if (!sharp_nt->prepared)
119 return 0;
120
121 ret = sharp_nt_panel_off(sharp_nt);
122 if (ret < 0) {
123 dev_err(panel->dev, "failed to set panel off: %d\n", ret);
124 return ret;
125 }
126
127 regulator_disable(sharp_nt->supply);
128 if (sharp_nt->reset_gpio)
129 gpiod_set_value(sharp_nt->reset_gpio, 0);
130
131 sharp_nt->prepared = false;
132
133 return 0;
134 }
135
sharp_nt_panel_prepare(struct drm_panel * panel)136 static int sharp_nt_panel_prepare(struct drm_panel *panel)
137 {
138 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
139 int ret;
140
141 if (sharp_nt->prepared)
142 return 0;
143
144 ret = regulator_enable(sharp_nt->supply);
145 if (ret < 0)
146 return ret;
147
148 msleep(20);
149
150 if (sharp_nt->reset_gpio) {
151 gpiod_set_value(sharp_nt->reset_gpio, 1);
152 msleep(1);
153 gpiod_set_value(sharp_nt->reset_gpio, 0);
154 msleep(1);
155 gpiod_set_value(sharp_nt->reset_gpio, 1);
156 msleep(10);
157 }
158
159 ret = sharp_nt_panel_init(sharp_nt);
160 if (ret < 0) {
161 dev_err(panel->dev, "failed to init panel: %d\n", ret);
162 goto poweroff;
163 }
164
165 ret = sharp_nt_panel_on(sharp_nt);
166 if (ret < 0) {
167 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
168 goto poweroff;
169 }
170
171 sharp_nt->prepared = true;
172
173 return 0;
174
175 poweroff:
176 regulator_disable(sharp_nt->supply);
177 if (sharp_nt->reset_gpio)
178 gpiod_set_value(sharp_nt->reset_gpio, 0);
179 return ret;
180 }
181
sharp_nt_panel_enable(struct drm_panel * panel)182 static int sharp_nt_panel_enable(struct drm_panel *panel)
183 {
184 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
185
186 if (sharp_nt->enabled)
187 return 0;
188
189 sharp_nt->enabled = true;
190
191 return 0;
192 }
193
194 static const struct drm_display_mode default_mode = {
195 .clock = (540 + 48 + 32 + 80) * (960 + 3 + 10 + 15) * 60 / 1000,
196 .hdisplay = 540,
197 .hsync_start = 540 + 48,
198 .hsync_end = 540 + 48 + 32,
199 .htotal = 540 + 48 + 32 + 80,
200 .vdisplay = 960,
201 .vsync_start = 960 + 3,
202 .vsync_end = 960 + 3 + 10,
203 .vtotal = 960 + 3 + 10 + 15,
204 };
205
sharp_nt_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)206 static int sharp_nt_panel_get_modes(struct drm_panel *panel,
207 struct drm_connector *connector)
208 {
209 struct drm_display_mode *mode;
210
211 mode = drm_mode_duplicate(connector->dev, &default_mode);
212 if (!mode) {
213 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
214 default_mode.hdisplay, default_mode.vdisplay,
215 drm_mode_vrefresh(&default_mode));
216 return -ENOMEM;
217 }
218
219 drm_mode_set_name(mode);
220
221 drm_mode_probed_add(connector, mode);
222
223 connector->display_info.width_mm = 54;
224 connector->display_info.height_mm = 95;
225
226 return 1;
227 }
228
229 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
230 .disable = sharp_nt_panel_disable,
231 .unprepare = sharp_nt_panel_unprepare,
232 .prepare = sharp_nt_panel_prepare,
233 .enable = sharp_nt_panel_enable,
234 .get_modes = sharp_nt_panel_get_modes,
235 };
236
sharp_nt_panel_add(struct sharp_nt_panel * sharp_nt)237 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
238 {
239 struct device *dev = &sharp_nt->dsi->dev;
240 int ret;
241
242 sharp_nt->mode = &default_mode;
243
244 sharp_nt->supply = devm_regulator_get(dev, "avdd");
245 if (IS_ERR(sharp_nt->supply))
246 return PTR_ERR(sharp_nt->supply);
247
248 sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
249 if (IS_ERR(sharp_nt->reset_gpio)) {
250 dev_err(dev, "cannot get reset-gpios %ld\n",
251 PTR_ERR(sharp_nt->reset_gpio));
252 sharp_nt->reset_gpio = NULL;
253 } else {
254 gpiod_set_value(sharp_nt->reset_gpio, 0);
255 }
256
257 drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
258 &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
259
260 ret = drm_panel_of_backlight(&sharp_nt->base);
261 if (ret)
262 return ret;
263
264 drm_panel_add(&sharp_nt->base);
265
266 return 0;
267 }
268
sharp_nt_panel_del(struct sharp_nt_panel * sharp_nt)269 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
270 {
271 if (sharp_nt->base.dev)
272 drm_panel_remove(&sharp_nt->base);
273 }
274
sharp_nt_panel_probe(struct mipi_dsi_device * dsi)275 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
276 {
277 struct sharp_nt_panel *sharp_nt;
278 int ret;
279
280 dsi->lanes = 2;
281 dsi->format = MIPI_DSI_FMT_RGB888;
282 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
283 MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
284 MIPI_DSI_MODE_VIDEO_HSE |
285 MIPI_DSI_CLOCK_NON_CONTINUOUS |
286 MIPI_DSI_MODE_NO_EOT_PACKET;
287
288 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
289 if (!sharp_nt)
290 return -ENOMEM;
291
292 mipi_dsi_set_drvdata(dsi, sharp_nt);
293
294 sharp_nt->dsi = dsi;
295
296 ret = sharp_nt_panel_add(sharp_nt);
297 if (ret < 0)
298 return ret;
299
300 ret = mipi_dsi_attach(dsi);
301 if (ret < 0) {
302 sharp_nt_panel_del(sharp_nt);
303 return ret;
304 }
305
306 return 0;
307 }
308
sharp_nt_panel_remove(struct mipi_dsi_device * dsi)309 static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
310 {
311 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
312 int ret;
313
314 ret = drm_panel_disable(&sharp_nt->base);
315 if (ret < 0)
316 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
317
318 ret = mipi_dsi_detach(dsi);
319 if (ret < 0)
320 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
321
322 sharp_nt_panel_del(sharp_nt);
323 }
324
sharp_nt_panel_shutdown(struct mipi_dsi_device * dsi)325 static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
326 {
327 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
328
329 drm_panel_disable(&sharp_nt->base);
330 }
331
332 static const struct of_device_id sharp_nt_of_match[] = {
333 { .compatible = "sharp,ls043t1le01-qhd", },
334 { }
335 };
336 MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
337
338 static struct mipi_dsi_driver sharp_nt_panel_driver = {
339 .driver = {
340 .name = "panel-sharp-ls043t1le01-qhd",
341 .of_match_table = sharp_nt_of_match,
342 },
343 .probe = sharp_nt_panel_probe,
344 .remove = sharp_nt_panel_remove,
345 .shutdown = sharp_nt_panel_shutdown,
346 };
347 module_mipi_dsi_driver(sharp_nt_panel_driver);
348
349 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
350 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
351 MODULE_LICENSE("GPL v2");
352