This source file includes following definitions.
- to_sharp_nt_panel
- sharp_nt_panel_init
- sharp_nt_panel_on
- sharp_nt_panel_off
- sharp_nt_panel_disable
- sharp_nt_panel_unprepare
- sharp_nt_panel_prepare
- sharp_nt_panel_enable
- sharp_nt_panel_get_modes
- sharp_nt_panel_add
- sharp_nt_panel_del
- sharp_nt_panel_probe
- sharp_nt_panel_remove
- sharp_nt_panel_shutdown
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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_device.h>
21 #include <drm/drm_mipi_dsi.h>
22 #include <drm/drm_panel.h>
23
24 struct sharp_nt_panel {
25 struct drm_panel base;
26 struct mipi_dsi_device *dsi;
27
28 struct backlight_device *backlight;
29 struct regulator *supply;
30 struct gpio_desc *reset_gpio;
31
32 bool prepared;
33 bool enabled;
34
35 const struct drm_display_mode *mode;
36 };
37
38 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
39 {
40 return container_of(panel, struct sharp_nt_panel, base);
41 }
42
43 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
44 {
45 struct mipi_dsi_device *dsi = sharp_nt->dsi;
46 int ret;
47
48 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
49
50 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
51 if (ret < 0)
52 return ret;
53
54 msleep(120);
55
56
57 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
58 if (ret < 0)
59 return ret;
60
61
62 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
63 (MIPI_DCS_PIXEL_FMT_24BIT << 4));
64 if (ret < 0)
65 return ret;
66
67 return 0;
68 }
69
70 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
71 {
72 struct mipi_dsi_device *dsi = sharp_nt->dsi;
73 int ret;
74
75 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
76
77 ret = mipi_dsi_dcs_set_display_on(dsi);
78 if (ret < 0)
79 return ret;
80
81 return 0;
82 }
83
84 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
85 {
86 struct mipi_dsi_device *dsi = sharp_nt->dsi;
87 int ret;
88
89 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
90
91 ret = mipi_dsi_dcs_set_display_off(dsi);
92 if (ret < 0)
93 return ret;
94
95 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
96 if (ret < 0)
97 return ret;
98
99 return 0;
100 }
101
102
103 static int sharp_nt_panel_disable(struct drm_panel *panel)
104 {
105 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
106
107 if (!sharp_nt->enabled)
108 return 0;
109
110 backlight_disable(sharp_nt->backlight);
111
112 sharp_nt->enabled = false;
113
114 return 0;
115 }
116
117 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
118 {
119 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
120 int ret;
121
122 if (!sharp_nt->prepared)
123 return 0;
124
125 ret = sharp_nt_panel_off(sharp_nt);
126 if (ret < 0) {
127 dev_err(panel->dev, "failed to set panel off: %d\n", ret);
128 return ret;
129 }
130
131 regulator_disable(sharp_nt->supply);
132 if (sharp_nt->reset_gpio)
133 gpiod_set_value(sharp_nt->reset_gpio, 0);
134
135 sharp_nt->prepared = false;
136
137 return 0;
138 }
139
140 static int sharp_nt_panel_prepare(struct drm_panel *panel)
141 {
142 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
143 int ret;
144
145 if (sharp_nt->prepared)
146 return 0;
147
148 ret = regulator_enable(sharp_nt->supply);
149 if (ret < 0)
150 return ret;
151
152 msleep(20);
153
154 if (sharp_nt->reset_gpio) {
155 gpiod_set_value(sharp_nt->reset_gpio, 1);
156 msleep(1);
157 gpiod_set_value(sharp_nt->reset_gpio, 0);
158 msleep(1);
159 gpiod_set_value(sharp_nt->reset_gpio, 1);
160 msleep(10);
161 }
162
163 ret = sharp_nt_panel_init(sharp_nt);
164 if (ret < 0) {
165 dev_err(panel->dev, "failed to init panel: %d\n", ret);
166 goto poweroff;
167 }
168
169 ret = sharp_nt_panel_on(sharp_nt);
170 if (ret < 0) {
171 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
172 goto poweroff;
173 }
174
175 sharp_nt->prepared = true;
176
177 return 0;
178
179 poweroff:
180 regulator_disable(sharp_nt->supply);
181 if (sharp_nt->reset_gpio)
182 gpiod_set_value(sharp_nt->reset_gpio, 0);
183 return ret;
184 }
185
186 static int sharp_nt_panel_enable(struct drm_panel *panel)
187 {
188 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
189
190 if (sharp_nt->enabled)
191 return 0;
192
193 backlight_enable(sharp_nt->backlight);
194
195 sharp_nt->enabled = true;
196
197 return 0;
198 }
199
200 static const struct drm_display_mode default_mode = {
201 .clock = 41118,
202 .hdisplay = 540,
203 .hsync_start = 540 + 48,
204 .hsync_end = 540 + 48 + 80,
205 .htotal = 540 + 48 + 80 + 32,
206 .vdisplay = 960,
207 .vsync_start = 960 + 3,
208 .vsync_end = 960 + 3 + 15,
209 .vtotal = 960 + 3 + 15 + 1,
210 .vrefresh = 60,
211 };
212
213 static int sharp_nt_panel_get_modes(struct drm_panel *panel)
214 {
215 struct drm_display_mode *mode;
216
217 mode = drm_mode_duplicate(panel->drm, &default_mode);
218 if (!mode) {
219 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
220 default_mode.hdisplay, default_mode.vdisplay,
221 default_mode.vrefresh);
222 return -ENOMEM;
223 }
224
225 drm_mode_set_name(mode);
226
227 drm_mode_probed_add(panel->connector, mode);
228
229 panel->connector->display_info.width_mm = 54;
230 panel->connector->display_info.height_mm = 95;
231
232 return 1;
233 }
234
235 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
236 .disable = sharp_nt_panel_disable,
237 .unprepare = sharp_nt_panel_unprepare,
238 .prepare = sharp_nt_panel_prepare,
239 .enable = sharp_nt_panel_enable,
240 .get_modes = sharp_nt_panel_get_modes,
241 };
242
243 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
244 {
245 struct device *dev = &sharp_nt->dsi->dev;
246
247 sharp_nt->mode = &default_mode;
248
249 sharp_nt->supply = devm_regulator_get(dev, "avdd");
250 if (IS_ERR(sharp_nt->supply))
251 return PTR_ERR(sharp_nt->supply);
252
253 sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
254 if (IS_ERR(sharp_nt->reset_gpio)) {
255 dev_err(dev, "cannot get reset-gpios %ld\n",
256 PTR_ERR(sharp_nt->reset_gpio));
257 sharp_nt->reset_gpio = NULL;
258 } else {
259 gpiod_set_value(sharp_nt->reset_gpio, 0);
260 }
261
262 sharp_nt->backlight = devm_of_find_backlight(dev);
263
264 if (IS_ERR(sharp_nt->backlight))
265 return PTR_ERR(sharp_nt->backlight);
266
267 drm_panel_init(&sharp_nt->base);
268 sharp_nt->base.funcs = &sharp_nt_panel_funcs;
269 sharp_nt->base.dev = &sharp_nt->dsi->dev;
270
271 return drm_panel_add(&sharp_nt->base);
272 }
273
274 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
275 {
276 if (sharp_nt->base.dev)
277 drm_panel_remove(&sharp_nt->base);
278 }
279
280 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
281 {
282 struct sharp_nt_panel *sharp_nt;
283 int ret;
284
285 dsi->lanes = 2;
286 dsi->format = MIPI_DSI_FMT_RGB888;
287 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
288 MIPI_DSI_MODE_VIDEO_HSE |
289 MIPI_DSI_CLOCK_NON_CONTINUOUS |
290 MIPI_DSI_MODE_EOT_PACKET;
291
292 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
293 if (!sharp_nt)
294 return -ENOMEM;
295
296 mipi_dsi_set_drvdata(dsi, sharp_nt);
297
298 sharp_nt->dsi = dsi;
299
300 ret = sharp_nt_panel_add(sharp_nt);
301 if (ret < 0)
302 return ret;
303
304 return mipi_dsi_attach(dsi);
305 }
306
307 static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
308 {
309 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
310 int ret;
311
312 ret = sharp_nt_panel_disable(&sharp_nt->base);
313 if (ret < 0)
314 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
315
316 ret = mipi_dsi_detach(dsi);
317 if (ret < 0)
318 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
319
320 sharp_nt_panel_del(sharp_nt);
321
322 return 0;
323 }
324
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 sharp_nt_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");