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12#include <linux/gpio/consumer.h>
13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/of.h>
17#include <linux/of_gpio.h>
18
19#include <drm/drm_edid.h>
20#include <video/omap-panel-data.h>
21
22#include "../dss/omapdss.h"
23
24static const struct omap_video_timings hdmic_default_timings = {
25 .x_res = 640,
26 .y_res = 480,
27 .pixelclock = 25175000,
28 .hsw = 96,
29 .hfp = 16,
30 .hbp = 48,
31 .vsw = 2,
32 .vfp = 11,
33 .vbp = 31,
34
35 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
36 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
37
38 .interlace = false,
39};
40
41struct panel_drv_data {
42 struct omap_dss_device dssdev;
43 struct omap_dss_device *in;
44
45 struct device *dev;
46
47 struct omap_video_timings timings;
48
49 int hpd_gpio;
50};
51
52#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
53
54static int hdmic_connect(struct omap_dss_device *dssdev)
55{
56 struct panel_drv_data *ddata = to_panel_data(dssdev);
57 struct omap_dss_device *in = ddata->in;
58 int r;
59
60 dev_dbg(ddata->dev, "connect\n");
61
62 if (omapdss_device_is_connected(dssdev))
63 return 0;
64
65 r = in->ops.hdmi->connect(in, dssdev);
66 if (r)
67 return r;
68
69 return 0;
70}
71
72static void hdmic_disconnect(struct omap_dss_device *dssdev)
73{
74 struct panel_drv_data *ddata = to_panel_data(dssdev);
75 struct omap_dss_device *in = ddata->in;
76
77 dev_dbg(ddata->dev, "disconnect\n");
78
79 if (!omapdss_device_is_connected(dssdev))
80 return;
81
82 in->ops.hdmi->disconnect(in, dssdev);
83}
84
85static int hdmic_enable(struct omap_dss_device *dssdev)
86{
87 struct panel_drv_data *ddata = to_panel_data(dssdev);
88 struct omap_dss_device *in = ddata->in;
89 int r;
90
91 dev_dbg(ddata->dev, "enable\n");
92
93 if (!omapdss_device_is_connected(dssdev))
94 return -ENODEV;
95
96 if (omapdss_device_is_enabled(dssdev))
97 return 0;
98
99 in->ops.hdmi->set_timings(in, &ddata->timings);
100
101 r = in->ops.hdmi->enable(in);
102 if (r)
103 return r;
104
105 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
106
107 return r;
108}
109
110static void hdmic_disable(struct omap_dss_device *dssdev)
111{
112 struct panel_drv_data *ddata = to_panel_data(dssdev);
113 struct omap_dss_device *in = ddata->in;
114
115 dev_dbg(ddata->dev, "disable\n");
116
117 if (!omapdss_device_is_enabled(dssdev))
118 return;
119
120 in->ops.hdmi->disable(in);
121
122 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
123}
124
125static void hdmic_set_timings(struct omap_dss_device *dssdev,
126 struct omap_video_timings *timings)
127{
128 struct panel_drv_data *ddata = to_panel_data(dssdev);
129 struct omap_dss_device *in = ddata->in;
130
131 ddata->timings = *timings;
132 dssdev->panel.timings = *timings;
133
134 in->ops.hdmi->set_timings(in, timings);
135}
136
137static void hdmic_get_timings(struct omap_dss_device *dssdev,
138 struct omap_video_timings *timings)
139{
140 struct panel_drv_data *ddata = to_panel_data(dssdev);
141
142 *timings = ddata->timings;
143}
144
145static int hdmic_check_timings(struct omap_dss_device *dssdev,
146 struct omap_video_timings *timings)
147{
148 struct panel_drv_data *ddata = to_panel_data(dssdev);
149 struct omap_dss_device *in = ddata->in;
150
151 return in->ops.hdmi->check_timings(in, timings);
152}
153
154static int hdmic_read_edid(struct omap_dss_device *dssdev,
155 u8 *edid, int len)
156{
157 struct panel_drv_data *ddata = to_panel_data(dssdev);
158 struct omap_dss_device *in = ddata->in;
159
160 return in->ops.hdmi->read_edid(in, edid, len);
161}
162
163static bool hdmic_detect(struct omap_dss_device *dssdev)
164{
165 struct panel_drv_data *ddata = to_panel_data(dssdev);
166 struct omap_dss_device *in = ddata->in;
167
168 if (gpio_is_valid(ddata->hpd_gpio))
169 return gpio_get_value_cansleep(ddata->hpd_gpio);
170 else
171 return in->ops.hdmi->detect(in);
172}
173
174static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode)
175{
176 struct panel_drv_data *ddata = to_panel_data(dssdev);
177 struct omap_dss_device *in = ddata->in;
178
179 return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
180}
181
182static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
183 const struct hdmi_avi_infoframe *avi)
184{
185 struct panel_drv_data *ddata = to_panel_data(dssdev);
186 struct omap_dss_device *in = ddata->in;
187
188 return in->ops.hdmi->set_infoframe(in, avi);
189}
190
191static struct omap_dss_driver hdmic_driver = {
192 .connect = hdmic_connect,
193 .disconnect = hdmic_disconnect,
194
195 .enable = hdmic_enable,
196 .disable = hdmic_disable,
197
198 .set_timings = hdmic_set_timings,
199 .get_timings = hdmic_get_timings,
200 .check_timings = hdmic_check_timings,
201
202 .get_resolution = omapdss_default_get_resolution,
203
204 .read_edid = hdmic_read_edid,
205 .detect = hdmic_detect,
206 .set_hdmi_mode = hdmic_set_hdmi_mode,
207 .set_hdmi_infoframe = hdmic_set_infoframe,
208};
209
210static int hdmic_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 gpio;
216
217
218 gpio = of_get_named_gpio(node, "hpd-gpios", 0);
219 if (gpio_is_valid(gpio))
220 ddata->hpd_gpio = gpio;
221 else
222 ddata->hpd_gpio = -ENODEV;
223
224 in = omapdss_of_find_source_for_first_ep(node);
225 if (IS_ERR(in)) {
226 dev_err(&pdev->dev, "failed to find video source\n");
227 return PTR_ERR(in);
228 }
229
230 ddata->in = in;
231
232 return 0;
233}
234
235static int hdmic_probe(struct platform_device *pdev)
236{
237 struct panel_drv_data *ddata;
238 struct omap_dss_device *dssdev;
239 int r;
240
241 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
242 if (!ddata)
243 return -ENOMEM;
244
245 platform_set_drvdata(pdev, ddata);
246 ddata->dev = &pdev->dev;
247
248 if (!pdev->dev.of_node)
249 return -ENODEV;
250
251 r = hdmic_probe_of(pdev);
252 if (r)
253 return r;
254
255 if (gpio_is_valid(ddata->hpd_gpio)) {
256 r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
257 GPIOF_DIR_IN, "hdmi_hpd");
258 if (r)
259 goto err_reg;
260 }
261
262 ddata->timings = hdmic_default_timings;
263
264 dssdev = &ddata->dssdev;
265 dssdev->driver = &hdmic_driver;
266 dssdev->dev = &pdev->dev;
267 dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
268 dssdev->owner = THIS_MODULE;
269 dssdev->panel.timings = hdmic_default_timings;
270
271 r = omapdss_register_display(dssdev);
272 if (r) {
273 dev_err(&pdev->dev, "Failed to register panel\n");
274 goto err_reg;
275 }
276
277 return 0;
278err_reg:
279 omap_dss_put_device(ddata->in);
280 return r;
281}
282
283static int __exit hdmic_remove(struct platform_device *pdev)
284{
285 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
286 struct omap_dss_device *dssdev = &ddata->dssdev;
287 struct omap_dss_device *in = ddata->in;
288
289 omapdss_unregister_display(&ddata->dssdev);
290
291 hdmic_disable(dssdev);
292 hdmic_disconnect(dssdev);
293
294 omap_dss_put_device(in);
295
296 return 0;
297}
298
299static const struct of_device_id hdmic_of_match[] = {
300 { .compatible = "omapdss,hdmi-connector", },
301 {},
302};
303
304MODULE_DEVICE_TABLE(of, hdmic_of_match);
305
306static struct platform_driver hdmi_connector_driver = {
307 .probe = hdmic_probe,
308 .remove = __exit_p(hdmic_remove),
309 .driver = {
310 .name = "connector-hdmi",
311 .of_match_table = hdmic_of_match,
312 .suppress_bind_attrs = true,
313 },
314};
315
316module_platform_driver(hdmi_connector_driver);
317
318MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
319MODULE_DESCRIPTION("HDMI Connector driver");
320MODULE_LICENSE("GPL");
321
