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