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/gpio/consumer.h>
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/mutex.h>
20 #include <drm/drm_edid.h>
22 #include "../dss/omapdss.h"
24 static const struct videomode hdmic_default_vm = {
27 .pixelclock = 25175000,
35 .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
38 struct panel_drv_data {
39 struct omap_dss_device dssdev;
40 struct omap_dss_device *in;
41 void (*hpd_cb)(void *cb_data, enum drm_connector_status status);
44 struct mutex hpd_lock;
53 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
55 static int hdmic_connect(struct omap_dss_device *dssdev)
57 struct panel_drv_data *ddata = to_panel_data(dssdev);
58 struct omap_dss_device *in = ddata->in;
61 dev_dbg(ddata->dev, "connect\n");
63 if (omapdss_device_is_connected(dssdev))
66 r = in->ops.hdmi->connect(in, dssdev);
73 static void hdmic_disconnect(struct omap_dss_device *dssdev)
75 struct panel_drv_data *ddata = to_panel_data(dssdev);
76 struct omap_dss_device *in = ddata->in;
78 dev_dbg(ddata->dev, "disconnect\n");
80 if (!omapdss_device_is_connected(dssdev))
83 in->ops.hdmi->disconnect(in, dssdev);
86 static int hdmic_enable(struct omap_dss_device *dssdev)
88 struct panel_drv_data *ddata = to_panel_data(dssdev);
89 struct omap_dss_device *in = ddata->in;
92 dev_dbg(ddata->dev, "enable\n");
94 if (!omapdss_device_is_connected(dssdev))
97 if (omapdss_device_is_enabled(dssdev))
100 in->ops.hdmi->set_timings(in, &ddata->vm);
102 r = in->ops.hdmi->enable(in);
106 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
111 static void hdmic_disable(struct omap_dss_device *dssdev)
113 struct panel_drv_data *ddata = to_panel_data(dssdev);
114 struct omap_dss_device *in = ddata->in;
116 dev_dbg(ddata->dev, "disable\n");
118 if (!omapdss_device_is_enabled(dssdev))
121 in->ops.hdmi->disable(in);
123 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
126 static void hdmic_set_timings(struct omap_dss_device *dssdev,
127 struct videomode *vm)
129 struct panel_drv_data *ddata = to_panel_data(dssdev);
130 struct omap_dss_device *in = ddata->in;
133 dssdev->panel.vm = *vm;
135 in->ops.hdmi->set_timings(in, vm);
138 static void hdmic_get_timings(struct omap_dss_device *dssdev,
139 struct videomode *vm)
141 struct panel_drv_data *ddata = to_panel_data(dssdev);
146 static int hdmic_check_timings(struct omap_dss_device *dssdev,
147 struct videomode *vm)
149 struct panel_drv_data *ddata = to_panel_data(dssdev);
150 struct omap_dss_device *in = ddata->in;
152 return in->ops.hdmi->check_timings(in, vm);
155 static int hdmic_read_edid(struct omap_dss_device *dssdev,
158 struct panel_drv_data *ddata = to_panel_data(dssdev);
159 struct omap_dss_device *in = ddata->in;
161 return in->ops.hdmi->read_edid(in, edid, len);
164 static bool hdmic_detect(struct omap_dss_device *dssdev)
166 struct panel_drv_data *ddata = to_panel_data(dssdev);
167 struct omap_dss_device *in = ddata->in;
169 if (gpio_is_valid(ddata->hpd_gpio))
170 return gpio_get_value_cansleep(ddata->hpd_gpio);
172 return in->ops.hdmi->detect(in);
175 static int hdmic_register_hpd_cb(struct omap_dss_device *dssdev,
176 void (*cb)(void *cb_data,
177 enum drm_connector_status status),
180 struct panel_drv_data *ddata = to_panel_data(dssdev);
181 struct omap_dss_device *in = ddata->in;
183 if (gpio_is_valid(ddata->hpd_gpio)) {
184 mutex_lock(&ddata->hpd_lock);
186 ddata->hpd_cb_data = cb_data;
187 mutex_unlock(&ddata->hpd_lock);
189 } else if (in->ops.hdmi->register_hpd_cb) {
190 return in->ops.hdmi->register_hpd_cb(in, cb, cb_data);
196 static void hdmic_unregister_hpd_cb(struct omap_dss_device *dssdev)
198 struct panel_drv_data *ddata = to_panel_data(dssdev);
199 struct omap_dss_device *in = ddata->in;
201 if (gpio_is_valid(ddata->hpd_gpio)) {
202 mutex_lock(&ddata->hpd_lock);
203 ddata->hpd_cb = NULL;
204 ddata->hpd_cb_data = NULL;
205 mutex_unlock(&ddata->hpd_lock);
206 } else if (in->ops.hdmi->unregister_hpd_cb) {
207 in->ops.hdmi->unregister_hpd_cb(in);
211 static void hdmic_enable_hpd(struct omap_dss_device *dssdev)
213 struct panel_drv_data *ddata = to_panel_data(dssdev);
214 struct omap_dss_device *in = ddata->in;
216 if (gpio_is_valid(ddata->hpd_gpio)) {
217 mutex_lock(&ddata->hpd_lock);
218 ddata->hpd_enabled = true;
219 mutex_unlock(&ddata->hpd_lock);
220 } else if (in->ops.hdmi->enable_hpd) {
221 in->ops.hdmi->enable_hpd(in);
225 static void hdmic_disable_hpd(struct omap_dss_device *dssdev)
227 struct panel_drv_data *ddata = to_panel_data(dssdev);
228 struct omap_dss_device *in = ddata->in;
230 if (gpio_is_valid(ddata->hpd_gpio)) {
231 mutex_lock(&ddata->hpd_lock);
232 ddata->hpd_enabled = false;
233 mutex_unlock(&ddata->hpd_lock);
234 } else if (in->ops.hdmi->disable_hpd) {
235 in->ops.hdmi->disable_hpd(in);
239 static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode)
241 struct panel_drv_data *ddata = to_panel_data(dssdev);
242 struct omap_dss_device *in = ddata->in;
244 return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
247 static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
248 const struct hdmi_avi_infoframe *avi)
250 struct panel_drv_data *ddata = to_panel_data(dssdev);
251 struct omap_dss_device *in = ddata->in;
253 return in->ops.hdmi->set_infoframe(in, avi);
256 static struct omap_dss_driver hdmic_driver = {
257 .connect = hdmic_connect,
258 .disconnect = hdmic_disconnect,
260 .enable = hdmic_enable,
261 .disable = hdmic_disable,
263 .set_timings = hdmic_set_timings,
264 .get_timings = hdmic_get_timings,
265 .check_timings = hdmic_check_timings,
267 .read_edid = hdmic_read_edid,
268 .detect = hdmic_detect,
269 .register_hpd_cb = hdmic_register_hpd_cb,
270 .unregister_hpd_cb = hdmic_unregister_hpd_cb,
271 .enable_hpd = hdmic_enable_hpd,
272 .disable_hpd = hdmic_disable_hpd,
273 .set_hdmi_mode = hdmic_set_hdmi_mode,
274 .set_hdmi_infoframe = hdmic_set_infoframe,
277 static irqreturn_t hdmic_hpd_isr(int irq, void *data)
279 struct panel_drv_data *ddata = data;
281 mutex_lock(&ddata->hpd_lock);
282 if (ddata->hpd_enabled && ddata->hpd_cb) {
283 enum drm_connector_status status;
285 if (hdmic_detect(&ddata->dssdev))
286 status = connector_status_connected;
288 status = connector_status_disconnected;
290 ddata->hpd_cb(ddata->hpd_cb_data, status);
292 mutex_unlock(&ddata->hpd_lock);
297 static int hdmic_probe_of(struct platform_device *pdev)
299 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
300 struct device_node *node = pdev->dev.of_node;
301 struct omap_dss_device *in;
305 gpio = of_get_named_gpio(node, "hpd-gpios", 0);
306 if (gpio_is_valid(gpio))
307 ddata->hpd_gpio = gpio;
309 ddata->hpd_gpio = -ENODEV;
311 in = omapdss_of_find_source_for_first_ep(node);
313 dev_err(&pdev->dev, "failed to find video source\n");
322 static int hdmic_probe(struct platform_device *pdev)
324 struct panel_drv_data *ddata;
325 struct omap_dss_device *dssdev;
328 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
332 platform_set_drvdata(pdev, ddata);
333 ddata->dev = &pdev->dev;
335 if (!pdev->dev.of_node)
338 r = hdmic_probe_of(pdev);
342 mutex_init(&ddata->hpd_lock);
344 if (gpio_is_valid(ddata->hpd_gpio)) {
345 r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
346 GPIOF_DIR_IN, "hdmi_hpd");
350 r = devm_request_threaded_irq(&pdev->dev,
351 gpio_to_irq(ddata->hpd_gpio),
353 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
360 ddata->vm = hdmic_default_vm;
362 dssdev = &ddata->dssdev;
363 dssdev->driver = &hdmic_driver;
364 dssdev->dev = &pdev->dev;
365 dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
366 dssdev->owner = THIS_MODULE;
367 dssdev->panel.vm = hdmic_default_vm;
369 r = omapdss_register_display(dssdev);
371 dev_err(&pdev->dev, "Failed to register panel\n");
377 omap_dss_put_device(ddata->in);
381 static int __exit hdmic_remove(struct platform_device *pdev)
383 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
384 struct omap_dss_device *dssdev = &ddata->dssdev;
385 struct omap_dss_device *in = ddata->in;
387 omapdss_unregister_display(&ddata->dssdev);
389 hdmic_disable(dssdev);
390 hdmic_disconnect(dssdev);
392 omap_dss_put_device(in);
397 static const struct of_device_id hdmic_of_match[] = {
398 { .compatible = "omapdss,hdmi-connector", },
402 MODULE_DEVICE_TABLE(of, hdmic_of_match);
404 static struct platform_driver hdmi_connector_driver = {
405 .probe = hdmic_probe,
406 .remove = __exit_p(hdmic_remove),
408 .name = "connector-hdmi",
409 .of_match_table = hdmic_of_match,
410 .suppress_bind_attrs = true,
414 module_platform_driver(hdmi_connector_driver);
416 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
417 MODULE_DESCRIPTION("HDMI Connector driver");
418 MODULE_LICENSE("GPL");