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21#include <linux/backlight.h>
22#include <linux/module.h>
23#include <linux/of.h>
24#include <linux/regulator/consumer.h>
25
26#include <drm/drmP.h>
27#include <drm/drm_crtc.h>
28#include <drm/drm_mipi_dsi.h>
29#include <drm/drm_panel.h>
30
31#include <video/mipi_display.h>
32
33
34
35
36
37
38#define MIN_POFF_MS (500)
39
40struct wuxga_nt_panel {
41 struct drm_panel base;
42 struct mipi_dsi_device *dsi;
43
44 struct backlight_device *backlight;
45 struct regulator *supply;
46
47 bool prepared;
48 bool enabled;
49
50 ktime_t earliest_wake;
51
52 const struct drm_display_mode *mode;
53};
54
55static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)
56{
57 return container_of(panel, struct wuxga_nt_panel, base);
58}
59
60static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
61{
62 struct mipi_dsi_device *dsi = wuxga_nt->dsi;
63 int ret;
64
65 ret = mipi_dsi_turn_on_peripheral(dsi);
66 if (ret < 0)
67 return ret;
68
69 return 0;
70}
71
72static int wuxga_nt_panel_disable(struct drm_panel *panel)
73{
74 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
75
76 if (!wuxga_nt->enabled)
77 return 0;
78
79 mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
80
81 if (wuxga_nt->backlight) {
82 wuxga_nt->backlight->props.power = FB_BLANK_POWERDOWN;
83 wuxga_nt->backlight->props.state |= BL_CORE_FBBLANK;
84 backlight_update_status(wuxga_nt->backlight);
85 }
86
87 wuxga_nt->enabled = false;
88
89 return 0;
90}
91
92static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
93{
94 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
95
96 if (!wuxga_nt->prepared)
97 return 0;
98
99 regulator_disable(wuxga_nt->supply);
100 wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
101 wuxga_nt->prepared = false;
102
103 return 0;
104}
105
106static int wuxga_nt_panel_prepare(struct drm_panel *panel)
107{
108 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
109 int ret;
110 s64 enablewait;
111
112 if (wuxga_nt->prepared)
113 return 0;
114
115
116
117
118
119 enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
120
121
122 if (enablewait > MIN_POFF_MS)
123 enablewait = MIN_POFF_MS;
124
125 if (enablewait > 0)
126 msleep(enablewait);
127
128 ret = regulator_enable(wuxga_nt->supply);
129 if (ret < 0)
130 return ret;
131
132
133
134
135
136 msleep(250);
137
138 ret = wuxga_nt_panel_on(wuxga_nt);
139 if (ret < 0) {
140 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
141 goto poweroff;
142 }
143
144 wuxga_nt->prepared = true;
145
146 return 0;
147
148poweroff:
149 regulator_disable(wuxga_nt->supply);
150
151 return ret;
152}
153
154static int wuxga_nt_panel_enable(struct drm_panel *panel)
155{
156 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
157
158 if (wuxga_nt->enabled)
159 return 0;
160
161 if (wuxga_nt->backlight) {
162 wuxga_nt->backlight->props.power = FB_BLANK_UNBLANK;
163 wuxga_nt->backlight->props.state &= ~BL_CORE_FBBLANK;
164 backlight_update_status(wuxga_nt->backlight);
165 }
166
167 wuxga_nt->enabled = true;
168
169 return 0;
170}
171
172static const struct drm_display_mode default_mode = {
173 .clock = 164402,
174 .hdisplay = 1920,
175 .hsync_start = 1920 + 152,
176 .hsync_end = 1920 + 152 + 52,
177 .htotal = 1920 + 152 + 52 + 20,
178 .vdisplay = 1200,
179 .vsync_start = 1200 + 24,
180 .vsync_end = 1200 + 24 + 6,
181 .vtotal = 1200 + 24 + 6 + 48,
182 .vrefresh = 60,
183};
184
185static int wuxga_nt_panel_get_modes(struct drm_panel *panel)
186{
187 struct drm_display_mode *mode;
188
189 mode = drm_mode_duplicate(panel->drm, &default_mode);
190 if (!mode) {
191 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
192 default_mode.hdisplay, default_mode.vdisplay,
193 default_mode.vrefresh);
194 return -ENOMEM;
195 }
196
197 drm_mode_set_name(mode);
198
199 drm_mode_probed_add(panel->connector, mode);
200
201 panel->connector->display_info.width_mm = 217;
202 panel->connector->display_info.height_mm = 136;
203
204 return 1;
205}
206
207static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
208 .disable = wuxga_nt_panel_disable,
209 .unprepare = wuxga_nt_panel_unprepare,
210 .prepare = wuxga_nt_panel_prepare,
211 .enable = wuxga_nt_panel_enable,
212 .get_modes = wuxga_nt_panel_get_modes,
213};
214
215static const struct of_device_id wuxga_nt_of_match[] = {
216 { .compatible = "panasonic,vvx10f034n00", },
217 { }
218};
219MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
220
221static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
222{
223 struct device *dev = &wuxga_nt->dsi->dev;
224 struct device_node *np;
225 int ret;
226
227 wuxga_nt->mode = &default_mode;
228
229 wuxga_nt->supply = devm_regulator_get(dev, "power");
230 if (IS_ERR(wuxga_nt->supply))
231 return PTR_ERR(wuxga_nt->supply);
232
233 np = of_parse_phandle(dev->of_node, "backlight", 0);
234 if (np) {
235 wuxga_nt->backlight = of_find_backlight_by_node(np);
236 of_node_put(np);
237
238 if (!wuxga_nt->backlight)
239 return -EPROBE_DEFER;
240 }
241
242 drm_panel_init(&wuxga_nt->base);
243 wuxga_nt->base.funcs = &wuxga_nt_panel_funcs;
244 wuxga_nt->base.dev = &wuxga_nt->dsi->dev;
245
246 ret = drm_panel_add(&wuxga_nt->base);
247 if (ret < 0)
248 goto put_backlight;
249
250 return 0;
251
252put_backlight:
253 if (wuxga_nt->backlight)
254 put_device(&wuxga_nt->backlight->dev);
255
256 return ret;
257}
258
259static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
260{
261 if (wuxga_nt->base.dev)
262 drm_panel_remove(&wuxga_nt->base);
263
264 if (wuxga_nt->backlight)
265 put_device(&wuxga_nt->backlight->dev);
266}
267
268static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
269{
270 struct wuxga_nt_panel *wuxga_nt;
271 int ret;
272
273 dsi->lanes = 4;
274 dsi->format = MIPI_DSI_FMT_RGB888;
275 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
276 MIPI_DSI_MODE_VIDEO_HSE |
277 MIPI_DSI_CLOCK_NON_CONTINUOUS |
278 MIPI_DSI_MODE_LPM;
279
280 wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
281 if (!wuxga_nt)
282 return -ENOMEM;
283
284 mipi_dsi_set_drvdata(dsi, wuxga_nt);
285
286 wuxga_nt->dsi = dsi;
287
288 ret = wuxga_nt_panel_add(wuxga_nt);
289 if (ret < 0)
290 return ret;
291
292 return mipi_dsi_attach(dsi);
293}
294
295static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
296{
297 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
298 int ret;
299
300 ret = wuxga_nt_panel_disable(&wuxga_nt->base);
301 if (ret < 0)
302 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
303
304 ret = mipi_dsi_detach(dsi);
305 if (ret < 0)
306 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
307
308 drm_panel_detach(&wuxga_nt->base);
309 wuxga_nt_panel_del(wuxga_nt);
310
311 return 0;
312}
313
314static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi)
315{
316 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
317
318 wuxga_nt_panel_disable(&wuxga_nt->base);
319}
320
321static struct mipi_dsi_driver wuxga_nt_panel_driver = {
322 .driver = {
323 .name = "panel-panasonic-vvx10f034n00",
324 .of_match_table = wuxga_nt_of_match,
325 },
326 .probe = wuxga_nt_panel_probe,
327 .remove = wuxga_nt_panel_remove,
328 .shutdown = wuxga_nt_panel_shutdown,
329};
330module_mipi_dsi_driver(wuxga_nt_panel_driver);
331
332MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
333MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
334MODULE_LICENSE("GPL v2");
335
