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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
23struct 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
36static 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
41static 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
55 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
56 if (ret < 0)
57 return ret;
58
59
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
68static 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
82static 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
101static 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
113static 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
136static 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
175poweroff:
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
182static 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
194static const struct drm_display_mode default_mode = {
195 .clock = 41118,
196 .hdisplay = 540,
197 .hsync_start = 540 + 48,
198 .hsync_end = 540 + 48 + 80,
199 .htotal = 540 + 48 + 80 + 32,
200 .vdisplay = 960,
201 .vsync_start = 960 + 3,
202 .vsync_end = 960 + 3 + 15,
203 .vtotal = 960 + 3 + 15 + 1,
204};
205
206static 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
229static 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
237static 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
269static 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
275static 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_HSE |
284 MIPI_DSI_CLOCK_NON_CONTINUOUS |
285 MIPI_DSI_MODE_NO_EOT_PACKET;
286
287 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
288 if (!sharp_nt)
289 return -ENOMEM;
290
291 mipi_dsi_set_drvdata(dsi, sharp_nt);
292
293 sharp_nt->dsi = dsi;
294
295 ret = sharp_nt_panel_add(sharp_nt);
296 if (ret < 0)
297 return ret;
298
299 return mipi_dsi_attach(dsi);
300}
301
302static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
303{
304 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
305 int ret;
306
307 ret = drm_panel_disable(&sharp_nt->base);
308 if (ret < 0)
309 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
310
311 ret = mipi_dsi_detach(dsi);
312 if (ret < 0)
313 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
314
315 sharp_nt_panel_del(sharp_nt);
316
317 return 0;
318}
319
320static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
321{
322 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
323
324 drm_panel_disable(&sharp_nt->base);
325}
326
327static const struct of_device_id sharp_nt_of_match[] = {
328 { .compatible = "sharp,ls043t1le01-qhd", },
329 { }
330};
331MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
332
333static struct mipi_dsi_driver sharp_nt_panel_driver = {
334 .driver = {
335 .name = "panel-sharp-ls043t1le01-qhd",
336 .of_match_table = sharp_nt_of_match,
337 },
338 .probe = sharp_nt_panel_probe,
339 .remove = sharp_nt_panel_remove,
340 .shutdown = sharp_nt_panel_shutdown,
341};
342module_mipi_dsi_driver(sharp_nt_panel_driver);
343
344MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
345MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
346MODULE_LICENSE("GPL v2");
347
