2 * HDMI Connector driver
4 * Copyright (C) 2013 Texas Instruments
5 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
16 #include <linux/of_gpio.h>
18 #include <drm/drm_edid.h>
20 #include <video/omapdss.h>
21 #include <video/omap-panel-data.h>
23 static const struct omap_video_timings hdmic_default_timings = {
26 .pixelclock = 25175000,
34 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
35 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
40 struct panel_drv_data {
41 struct omap_dss_device dssdev;
42 struct omap_dss_device *in;
46 struct omap_video_timings timings;
51 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
53 static int hdmic_connect(struct omap_dss_device *dssdev)
55 struct panel_drv_data *ddata = to_panel_data(dssdev);
56 struct omap_dss_device *in = ddata->in;
59 dev_dbg(ddata->dev, "connect\n");
61 if (omapdss_device_is_connected(dssdev))
64 r = in->ops.hdmi->connect(in, dssdev);
71 static void hdmic_disconnect(struct omap_dss_device *dssdev)
73 struct panel_drv_data *ddata = to_panel_data(dssdev);
74 struct omap_dss_device *in = ddata->in;
76 dev_dbg(ddata->dev, "disconnect\n");
78 if (!omapdss_device_is_connected(dssdev))
81 in->ops.hdmi->disconnect(in, dssdev);
84 static int hdmic_enable(struct omap_dss_device *dssdev)
86 struct panel_drv_data *ddata = to_panel_data(dssdev);
87 struct omap_dss_device *in = ddata->in;
90 dev_dbg(ddata->dev, "enable\n");
92 if (!omapdss_device_is_connected(dssdev))
95 if (omapdss_device_is_enabled(dssdev))
98 in->ops.hdmi->set_timings(in, &ddata->timings);
100 r = in->ops.hdmi->enable(in);
104 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
109 static void hdmic_disable(struct omap_dss_device *dssdev)
111 struct panel_drv_data *ddata = to_panel_data(dssdev);
112 struct omap_dss_device *in = ddata->in;
114 dev_dbg(ddata->dev, "disable\n");
116 if (!omapdss_device_is_enabled(dssdev))
119 in->ops.hdmi->disable(in);
121 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
124 static void hdmic_set_timings(struct omap_dss_device *dssdev,
125 struct omap_video_timings *timings)
127 struct panel_drv_data *ddata = to_panel_data(dssdev);
128 struct omap_dss_device *in = ddata->in;
130 ddata->timings = *timings;
131 dssdev->panel.timings = *timings;
133 in->ops.hdmi->set_timings(in, timings);
136 static void hdmic_get_timings(struct omap_dss_device *dssdev,
137 struct omap_video_timings *timings)
139 struct panel_drv_data *ddata = to_panel_data(dssdev);
141 *timings = ddata->timings;
144 static int hdmic_check_timings(struct omap_dss_device *dssdev,
145 struct omap_video_timings *timings)
147 struct panel_drv_data *ddata = to_panel_data(dssdev);
148 struct omap_dss_device *in = ddata->in;
150 return in->ops.hdmi->check_timings(in, timings);
153 static int hdmic_read_edid(struct omap_dss_device *dssdev,
156 struct panel_drv_data *ddata = to_panel_data(dssdev);
157 struct omap_dss_device *in = ddata->in;
159 return in->ops.hdmi->read_edid(in, edid, len);
162 static bool hdmic_detect(struct omap_dss_device *dssdev)
164 struct panel_drv_data *ddata = to_panel_data(dssdev);
165 struct omap_dss_device *in = ddata->in;
167 if (gpio_is_valid(ddata->hpd_gpio))
168 return gpio_get_value_cansleep(ddata->hpd_gpio);
170 return in->ops.hdmi->detect(in);
173 static int hdmic_audio_enable(struct omap_dss_device *dssdev)
175 struct panel_drv_data *ddata = to_panel_data(dssdev);
176 struct omap_dss_device *in = ddata->in;
179 /* enable audio only if the display is active */
180 if (!omapdss_device_is_enabled(dssdev))
183 r = in->ops.hdmi->audio_enable(in);
187 dssdev->audio_state = OMAP_DSS_AUDIO_ENABLED;
192 static void hdmic_audio_disable(struct omap_dss_device *dssdev)
194 struct panel_drv_data *ddata = to_panel_data(dssdev);
195 struct omap_dss_device *in = ddata->in;
197 in->ops.hdmi->audio_disable(in);
199 dssdev->audio_state = OMAP_DSS_AUDIO_DISABLED;
202 static int hdmic_audio_start(struct omap_dss_device *dssdev)
204 struct panel_drv_data *ddata = to_panel_data(dssdev);
205 struct omap_dss_device *in = ddata->in;
209 * No need to check the panel state. It was checked when trasitioning
212 if (dssdev->audio_state != OMAP_DSS_AUDIO_ENABLED)
215 r = in->ops.hdmi->audio_start(in);
219 dssdev->audio_state = OMAP_DSS_AUDIO_PLAYING;
224 static void hdmic_audio_stop(struct omap_dss_device *dssdev)
226 struct panel_drv_data *ddata = to_panel_data(dssdev);
227 struct omap_dss_device *in = ddata->in;
229 in->ops.hdmi->audio_stop(in);
231 dssdev->audio_state = OMAP_DSS_AUDIO_ENABLED;
234 static bool hdmic_audio_supported(struct omap_dss_device *dssdev)
236 struct panel_drv_data *ddata = to_panel_data(dssdev);
237 struct omap_dss_device *in = ddata->in;
239 if (!omapdss_device_is_enabled(dssdev))
242 return in->ops.hdmi->audio_supported(in);
245 static int hdmic_audio_config(struct omap_dss_device *dssdev,
246 struct omap_dss_audio *audio)
248 struct panel_drv_data *ddata = to_panel_data(dssdev);
249 struct omap_dss_device *in = ddata->in;
252 /* config audio only if the display is active */
253 if (!omapdss_device_is_enabled(dssdev))
256 r = in->ops.hdmi->audio_config(in, audio);
260 dssdev->audio_state = OMAP_DSS_AUDIO_CONFIGURED;
265 static struct omap_dss_driver hdmic_driver = {
266 .connect = hdmic_connect,
267 .disconnect = hdmic_disconnect,
269 .enable = hdmic_enable,
270 .disable = hdmic_disable,
272 .set_timings = hdmic_set_timings,
273 .get_timings = hdmic_get_timings,
274 .check_timings = hdmic_check_timings,
276 .get_resolution = omapdss_default_get_resolution,
278 .read_edid = hdmic_read_edid,
279 .detect = hdmic_detect,
281 .audio_enable = hdmic_audio_enable,
282 .audio_disable = hdmic_audio_disable,
283 .audio_start = hdmic_audio_start,
284 .audio_stop = hdmic_audio_stop,
285 .audio_supported = hdmic_audio_supported,
286 .audio_config = hdmic_audio_config,
289 static int hdmic_probe_pdata(struct platform_device *pdev)
291 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
292 struct connector_hdmi_platform_data *pdata;
293 struct omap_dss_device *in, *dssdev;
295 pdata = dev_get_platdata(&pdev->dev);
297 ddata->hpd_gpio = -ENODEV;
299 in = omap_dss_find_output(pdata->source);
301 dev_err(&pdev->dev, "Failed to find video source\n");
302 return -EPROBE_DEFER;
307 dssdev = &ddata->dssdev;
308 dssdev->name = pdata->name;
313 static int hdmic_probe_of(struct platform_device *pdev)
315 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
316 struct device_node *node = pdev->dev.of_node;
317 struct omap_dss_device *in;
321 gpio = of_get_named_gpio(node, "hpd-gpios", 0);
322 if (gpio_is_valid(gpio))
323 ddata->hpd_gpio = gpio;
325 ddata->hpd_gpio = -ENODEV;
327 in = omapdss_of_find_source_for_first_ep(node);
329 dev_err(&pdev->dev, "failed to find video source\n");
338 static int hdmic_probe(struct platform_device *pdev)
340 struct panel_drv_data *ddata;
341 struct omap_dss_device *dssdev;
344 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
348 platform_set_drvdata(pdev, ddata);
349 ddata->dev = &pdev->dev;
351 if (dev_get_platdata(&pdev->dev)) {
352 r = hdmic_probe_pdata(pdev);
355 } else if (pdev->dev.of_node) {
356 r = hdmic_probe_of(pdev);
363 if (gpio_is_valid(ddata->hpd_gpio)) {
364 r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
365 GPIOF_DIR_IN, "hdmi_hpd");
370 ddata->timings = hdmic_default_timings;
372 dssdev = &ddata->dssdev;
373 dssdev->driver = &hdmic_driver;
374 dssdev->dev = &pdev->dev;
375 dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
376 dssdev->owner = THIS_MODULE;
377 dssdev->panel.timings = hdmic_default_timings;
379 r = omapdss_register_display(dssdev);
381 dev_err(&pdev->dev, "Failed to register panel\n");
387 omap_dss_put_device(ddata->in);
391 static int __exit hdmic_remove(struct platform_device *pdev)
393 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
394 struct omap_dss_device *dssdev = &ddata->dssdev;
395 struct omap_dss_device *in = ddata->in;
397 omapdss_unregister_display(&ddata->dssdev);
399 hdmic_disable(dssdev);
400 hdmic_disconnect(dssdev);
402 omap_dss_put_device(in);
407 static const struct of_device_id hdmic_of_match[] = {
408 { .compatible = "omapdss,hdmi-connector", },
412 MODULE_DEVICE_TABLE(of, hdmic_of_match);
414 static struct platform_driver hdmi_connector_driver = {
415 .probe = hdmic_probe,
416 .remove = __exit_p(hdmic_remove),
418 .name = "connector-hdmi",
419 .owner = THIS_MODULE,
420 .of_match_table = hdmic_of_match,
424 module_platform_driver(hdmi_connector_driver);
426 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
427 MODULE_DESCRIPTION("HDMI Connector driver");
428 MODULE_LICENSE("GPL");