1
2
3
4
5
6
7
8
9
10
11
12#include <linux/gpio/consumer.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/slab.h>
16#include <linux/of.h>
17#include <linux/of_gpio.h>
18#include <linux/regulator/consumer.h>
19
20#include <video/omap-panel-data.h>
21#include <video/of_display_timing.h>
22
23#include "../dss/omapdss.h"
24
25struct panel_drv_data {
26 struct omap_dss_device dssdev;
27 struct omap_dss_device *in;
28
29 int data_lines;
30
31 struct omap_video_timings videomode;
32
33
34 int backlight_gpio;
35
36 struct gpio_desc *enable_gpio;
37 struct regulator *vcc_supply;
38};
39
40#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
41
42static int panel_dpi_connect(struct omap_dss_device *dssdev)
43{
44 struct panel_drv_data *ddata = to_panel_data(dssdev);
45 struct omap_dss_device *in = ddata->in;
46 int r;
47
48 if (omapdss_device_is_connected(dssdev))
49 return 0;
50
51 r = in->ops.dpi->connect(in, dssdev);
52 if (r)
53 return r;
54
55 return 0;
56}
57
58static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
59{
60 struct panel_drv_data *ddata = to_panel_data(dssdev);
61 struct omap_dss_device *in = ddata->in;
62
63 if (!omapdss_device_is_connected(dssdev))
64 return;
65
66 in->ops.dpi->disconnect(in, dssdev);
67}
68
69static int panel_dpi_enable(struct omap_dss_device *dssdev)
70{
71 struct panel_drv_data *ddata = to_panel_data(dssdev);
72 struct omap_dss_device *in = ddata->in;
73 int r;
74
75 if (!omapdss_device_is_connected(dssdev))
76 return -ENODEV;
77
78 if (omapdss_device_is_enabled(dssdev))
79 return 0;
80
81 if (ddata->data_lines)
82 in->ops.dpi->set_data_lines(in, ddata->data_lines);
83 in->ops.dpi->set_timings(in, &ddata->videomode);
84
85 r = in->ops.dpi->enable(in);
86 if (r)
87 return r;
88
89 r = regulator_enable(ddata->vcc_supply);
90 if (r) {
91 in->ops.dpi->disable(in);
92 return r;
93 }
94
95 gpiod_set_value_cansleep(ddata->enable_gpio, 1);
96
97 if (gpio_is_valid(ddata->backlight_gpio))
98 gpio_set_value_cansleep(ddata->backlight_gpio, 1);
99
100 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
101
102 return 0;
103}
104
105static void panel_dpi_disable(struct omap_dss_device *dssdev)
106{
107 struct panel_drv_data *ddata = to_panel_data(dssdev);
108 struct omap_dss_device *in = ddata->in;
109
110 if (!omapdss_device_is_enabled(dssdev))
111 return;
112
113 if (gpio_is_valid(ddata->backlight_gpio))
114 gpio_set_value_cansleep(ddata->backlight_gpio, 0);
115
116 gpiod_set_value_cansleep(ddata->enable_gpio, 0);
117 regulator_disable(ddata->vcc_supply);
118
119 in->ops.dpi->disable(in);
120
121 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
122}
123
124static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
125 struct omap_video_timings *timings)
126{
127 struct panel_drv_data *ddata = to_panel_data(dssdev);
128 struct omap_dss_device *in = ddata->in;
129
130 ddata->videomode = *timings;
131 dssdev->panel.timings = *timings;
132
133 in->ops.dpi->set_timings(in, timings);
134}
135
136static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
137 struct omap_video_timings *timings)
138{
139 struct panel_drv_data *ddata = to_panel_data(dssdev);
140
141 *timings = ddata->videomode;
142}
143
144static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
145 struct omap_video_timings *timings)
146{
147 struct panel_drv_data *ddata = to_panel_data(dssdev);
148 struct omap_dss_device *in = ddata->in;
149
150 return in->ops.dpi->check_timings(in, timings);
151}
152
153static struct omap_dss_driver panel_dpi_ops = {
154 .connect = panel_dpi_connect,
155 .disconnect = panel_dpi_disconnect,
156
157 .enable = panel_dpi_enable,
158 .disable = panel_dpi_disable,
159
160 .set_timings = panel_dpi_set_timings,
161 .get_timings = panel_dpi_get_timings,
162 .check_timings = panel_dpi_check_timings,
163
164 .get_resolution = omapdss_default_get_resolution,
165};
166
167static int panel_dpi_probe_pdata(struct platform_device *pdev)
168{
169 const struct panel_dpi_platform_data *pdata;
170 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
171 struct omap_dss_device *dssdev, *in;
172 struct videomode vm;
173 int r;
174
175 pdata = dev_get_platdata(&pdev->dev);
176
177 in = omap_dss_find_output(pdata->source);
178 if (in == NULL) {
179 dev_err(&pdev->dev, "failed to find video source '%s'\n",
180 pdata->source);
181 return -EPROBE_DEFER;
182 }
183
184 ddata->in = in;
185
186 ddata->data_lines = pdata->data_lines;
187
188 videomode_from_timing(pdata->display_timing, &vm);
189 videomode_to_omap_video_timings(&vm, &ddata->videomode);
190
191 dssdev = &ddata->dssdev;
192 dssdev->name = pdata->name;
193
194 r = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
195 GPIOF_OUT_INIT_LOW, "panel enable");
196 if (r)
197 goto err_gpio;
198
199 ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio);
200
201 ddata->backlight_gpio = pdata->backlight_gpio;
202
203 return 0;
204
205err_gpio:
206 omap_dss_put_device(ddata->in);
207 return r;
208}
209
210static int panel_dpi_probe_of(struct platform_device *pdev)
211{
212 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
213 struct device_node *node = pdev->dev.of_node;
214 struct omap_dss_device *in;
215 int r;
216 struct display_timing timing;
217 struct videomode vm;
218 struct gpio_desc *gpio;
219
220 gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
221 if (IS_ERR(gpio))
222 return PTR_ERR(gpio);
223
224 ddata->enable_gpio = gpio;
225
226
227
228
229
230
231
232 gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
233 if (IS_ERR(gpio))
234 return PTR_ERR(gpio);
235
236 ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc");
237 if (IS_ERR(ddata->vcc_supply))
238 return PTR_ERR(ddata->vcc_supply);
239
240 ddata->backlight_gpio = -ENOENT;
241
242 r = of_get_display_timing(node, "panel-timing", &timing);
243 if (r) {
244 dev_err(&pdev->dev, "failed to get video timing\n");
245 return r;
246 }
247
248 videomode_from_timing(&timing, &vm);
249 videomode_to_omap_video_timings(&vm, &ddata->videomode);
250
251 in = omapdss_of_find_source_for_first_ep(node);
252 if (IS_ERR(in)) {
253 dev_err(&pdev->dev, "failed to find video source\n");
254 return PTR_ERR(in);
255 }
256
257 ddata->in = in;
258
259 return 0;
260}
261
262static int panel_dpi_probe(struct platform_device *pdev)
263{
264 struct panel_drv_data *ddata;
265 struct omap_dss_device *dssdev;
266 int r;
267
268 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
269 if (ddata == NULL)
270 return -ENOMEM;
271
272 platform_set_drvdata(pdev, ddata);
273
274 if (dev_get_platdata(&pdev->dev)) {
275 r = panel_dpi_probe_pdata(pdev);
276 if (r)
277 return r;
278 } else if (pdev->dev.of_node) {
279 r = panel_dpi_probe_of(pdev);
280 if (r)
281 return r;
282 } else {
283 return -ENODEV;
284 }
285
286 if (gpio_is_valid(ddata->backlight_gpio)) {
287 r = devm_gpio_request_one(&pdev->dev, ddata->backlight_gpio,
288 GPIOF_OUT_INIT_LOW, "panel backlight");
289 if (r)
290 goto err_gpio;
291 }
292
293 dssdev = &ddata->dssdev;
294 dssdev->dev = &pdev->dev;
295 dssdev->driver = &panel_dpi_ops;
296 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
297 dssdev->owner = THIS_MODULE;
298 dssdev->panel.timings = ddata->videomode;
299 dssdev->phy.dpi.data_lines = ddata->data_lines;
300
301 r = omapdss_register_display(dssdev);
302 if (r) {
303 dev_err(&pdev->dev, "Failed to register panel\n");
304 goto err_reg;
305 }
306
307 return 0;
308
309err_reg:
310err_gpio:
311 omap_dss_put_device(ddata->in);
312 return r;
313}
314
315static int __exit panel_dpi_remove(struct platform_device *pdev)
316{
317 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
318 struct omap_dss_device *dssdev = &ddata->dssdev;
319 struct omap_dss_device *in = ddata->in;
320
321 omapdss_unregister_display(dssdev);
322
323 panel_dpi_disable(dssdev);
324 panel_dpi_disconnect(dssdev);
325
326 omap_dss_put_device(in);
327
328 return 0;
329}
330
331static const struct of_device_id panel_dpi_of_match[] = {
332 { .compatible = "omapdss,panel-dpi", },
333 {},
334};
335
336MODULE_DEVICE_TABLE(of, panel_dpi_of_match);
337
338static struct platform_driver panel_dpi_driver = {
339 .probe = panel_dpi_probe,
340 .remove = __exit_p(panel_dpi_remove),
341 .driver = {
342 .name = "panel-dpi",
343 .of_match_table = panel_dpi_of_match,
344 .suppress_bind_attrs = true,
345 },
346};
347
348module_platform_driver(panel_dpi_driver);
349
350MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
351MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
352MODULE_LICENSE("GPL");
353
