1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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 return mipi_dsi_turn_on_peripheral(wuxga_nt->dsi);
63}
64
65static int wuxga_nt_panel_disable(struct drm_panel *panel)
66{
67 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
68 int mipi_ret, bl_ret = 0;
69
70 if (!wuxga_nt->enabled)
71 return 0;
72
73 mipi_ret = mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
74
75 if (wuxga_nt->backlight) {
76 wuxga_nt->backlight->props.power = FB_BLANK_POWERDOWN;
77 wuxga_nt->backlight->props.state |= BL_CORE_FBBLANK;
78 bl_ret = backlight_update_status(wuxga_nt->backlight);
79 }
80
81 wuxga_nt->enabled = false;
82
83 return mipi_ret ? mipi_ret : bl_ret;
84}
85
86static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
87{
88 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
89
90 if (!wuxga_nt->prepared)
91 return 0;
92
93 regulator_disable(wuxga_nt->supply);
94 wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
95 wuxga_nt->prepared = false;
96
97 return 0;
98}
99
100static int wuxga_nt_panel_prepare(struct drm_panel *panel)
101{
102 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
103 int ret;
104 s64 enablewait;
105
106 if (wuxga_nt->prepared)
107 return 0;
108
109
110
111
112
113 enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
114
115
116 if (enablewait > MIN_POFF_MS)
117 enablewait = MIN_POFF_MS;
118
119 if (enablewait > 0)
120 msleep(enablewait);
121
122 ret = regulator_enable(wuxga_nt->supply);
123 if (ret < 0)
124 return ret;
125
126
127
128
129
130 msleep(250);
131
132 ret = wuxga_nt_panel_on(wuxga_nt);
133 if (ret < 0) {
134 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
135 goto poweroff;
136 }
137
138 wuxga_nt->prepared = true;
139
140 return 0;
141
142poweroff:
143 regulator_disable(wuxga_nt->supply);
144
145 return ret;
146}
147
148static int wuxga_nt_panel_enable(struct drm_panel *panel)
149{
150 struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
151
152 if (wuxga_nt->enabled)
153 return 0;
154
155 if (wuxga_nt->backlight) {
156 wuxga_nt->backlight->props.power = FB_BLANK_UNBLANK;
157 wuxga_nt->backlight->props.state &= ~BL_CORE_FBBLANK;
158 backlight_update_status(wuxga_nt->backlight);
159 }
160
161 wuxga_nt->enabled = true;
162
163 return 0;
164}
165
166static const struct drm_display_mode default_mode = {
167 .clock = 164402,
168 .hdisplay = 1920,
169 .hsync_start = 1920 + 152,
170 .hsync_end = 1920 + 152 + 52,
171 .htotal = 1920 + 152 + 52 + 20,
172 .vdisplay = 1200,
173 .vsync_start = 1200 + 24,
174 .vsync_end = 1200 + 24 + 6,
175 .vtotal = 1200 + 24 + 6 + 48,
176 .vrefresh = 60,
177};
178
179static int wuxga_nt_panel_get_modes(struct drm_panel *panel)
180{
181 struct drm_display_mode *mode;
182
183 mode = drm_mode_duplicate(panel->drm, &default_mode);
184 if (!mode) {
185 dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
186 default_mode.hdisplay, default_mode.vdisplay,
187 default_mode.vrefresh);
188 return -ENOMEM;
189 }
190
191 drm_mode_set_name(mode);
192
193 drm_mode_probed_add(panel->connector, mode);
194
195 panel->connector->display_info.width_mm = 217;
196 panel->connector->display_info.height_mm = 136;
197
198 return 1;
199}
200
201static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
202 .disable = wuxga_nt_panel_disable,
203 .unprepare = wuxga_nt_panel_unprepare,
204 .prepare = wuxga_nt_panel_prepare,
205 .enable = wuxga_nt_panel_enable,
206 .get_modes = wuxga_nt_panel_get_modes,
207};
208
209static const struct of_device_id wuxga_nt_of_match[] = {
210 { .compatible = "panasonic,vvx10f034n00", },
211 { }
212};
213MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
214
215static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
216{
217 struct device *dev = &wuxga_nt->dsi->dev;
218 struct device_node *np;
219 int ret;
220
221 wuxga_nt->mode = &default_mode;
222
223 wuxga_nt->supply = devm_regulator_get(dev, "power");
224 if (IS_ERR(wuxga_nt->supply))
225 return PTR_ERR(wuxga_nt->supply);
226
227 np = of_parse_phandle(dev->of_node, "backlight", 0);
228 if (np) {
229 wuxga_nt->backlight = of_find_backlight_by_node(np);
230 of_node_put(np);
231
232 if (!wuxga_nt->backlight)
233 return -EPROBE_DEFER;
234 }
235
236 drm_panel_init(&wuxga_nt->base);
237 wuxga_nt->base.funcs = &wuxga_nt_panel_funcs;
238 wuxga_nt->base.dev = &wuxga_nt->dsi->dev;
239
240 ret = drm_panel_add(&wuxga_nt->base);
241 if (ret < 0)
242 goto put_backlight;
243
244 return 0;
245
246put_backlight:
247 if (wuxga_nt->backlight)
248 put_device(&wuxga_nt->backlight->dev);
249
250 return ret;
251}
252
253static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
254{
255 if (wuxga_nt->base.dev)
256 drm_panel_remove(&wuxga_nt->base);
257
258 if (wuxga_nt->backlight)
259 put_device(&wuxga_nt->backlight->dev);
260}
261
262static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
263{
264 struct wuxga_nt_panel *wuxga_nt;
265 int ret;
266
267 dsi->lanes = 4;
268 dsi->format = MIPI_DSI_FMT_RGB888;
269 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
270 MIPI_DSI_MODE_VIDEO_HSE |
271 MIPI_DSI_CLOCK_NON_CONTINUOUS |
272 MIPI_DSI_MODE_LPM;
273
274 wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
275 if (!wuxga_nt)
276 return -ENOMEM;
277
278 mipi_dsi_set_drvdata(dsi, wuxga_nt);
279
280 wuxga_nt->dsi = dsi;
281
282 ret = wuxga_nt_panel_add(wuxga_nt);
283 if (ret < 0)
284 return ret;
285
286 return mipi_dsi_attach(dsi);
287}
288
289static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
290{
291 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
292 int ret;
293
294 ret = wuxga_nt_panel_disable(&wuxga_nt->base);
295 if (ret < 0)
296 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
297
298 ret = mipi_dsi_detach(dsi);
299 if (ret < 0)
300 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
301
302 drm_panel_detach(&wuxga_nt->base);
303 wuxga_nt_panel_del(wuxga_nt);
304
305 return 0;
306}
307
308static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi)
309{
310 struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
311
312 wuxga_nt_panel_disable(&wuxga_nt->base);
313}
314
315static struct mipi_dsi_driver wuxga_nt_panel_driver = {
316 .driver = {
317 .name = "panel-panasonic-vvx10f034n00",
318 .of_match_table = wuxga_nt_of_match,
319 },
320 .probe = wuxga_nt_panel_probe,
321 .remove = wuxga_nt_panel_remove,
322 .shutdown = wuxga_nt_panel_shutdown,
323};
324module_mipi_dsi_driver(wuxga_nt_panel_driver);
325
326MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
327MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
328MODULE_LICENSE("GPL v2");
329
