318 lines
6.9 KiB
C
318 lines
6.9 KiB
C
/*
|
|
* HDMI Connector driver
|
|
*
|
|
* Copyright (C) 2013 Texas Instruments
|
|
* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_gpio.h>
|
|
|
|
#include <drm/drm_edid.h>
|
|
#include <video/omap-panel-data.h>
|
|
|
|
#include "../dss/omapdss.h"
|
|
|
|
static const struct videomode hdmic_default_vm = {
|
|
.hactive = 640,
|
|
.vactive = 480,
|
|
.pixelclock = 25175000,
|
|
.hsync_len = 96,
|
|
.hfront_porch = 16,
|
|
.hback_porch = 48,
|
|
.vsync_len = 2,
|
|
.vfront_porch = 11,
|
|
.vback_porch = 31,
|
|
|
|
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
|
|
};
|
|
|
|
struct panel_drv_data {
|
|
struct omap_dss_device dssdev;
|
|
struct omap_dss_device *in;
|
|
|
|
struct device *dev;
|
|
|
|
struct videomode vm;
|
|
|
|
int hpd_gpio;
|
|
};
|
|
|
|
#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
|
|
|
|
static int hdmic_connect(struct omap_dss_device *dssdev)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
int r;
|
|
|
|
dev_dbg(ddata->dev, "connect\n");
|
|
|
|
if (omapdss_device_is_connected(dssdev))
|
|
return 0;
|
|
|
|
r = in->ops.hdmi->connect(in, dssdev);
|
|
if (r)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hdmic_disconnect(struct omap_dss_device *dssdev)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
dev_dbg(ddata->dev, "disconnect\n");
|
|
|
|
if (!omapdss_device_is_connected(dssdev))
|
|
return;
|
|
|
|
in->ops.hdmi->disconnect(in, dssdev);
|
|
}
|
|
|
|
static int hdmic_enable(struct omap_dss_device *dssdev)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
int r;
|
|
|
|
dev_dbg(ddata->dev, "enable\n");
|
|
|
|
if (!omapdss_device_is_connected(dssdev))
|
|
return -ENODEV;
|
|
|
|
if (omapdss_device_is_enabled(dssdev))
|
|
return 0;
|
|
|
|
in->ops.hdmi->set_timings(in, &ddata->vm);
|
|
|
|
r = in->ops.hdmi->enable(in);
|
|
if (r)
|
|
return r;
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
|
|
|
return r;
|
|
}
|
|
|
|
static void hdmic_disable(struct omap_dss_device *dssdev)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
dev_dbg(ddata->dev, "disable\n");
|
|
|
|
if (!omapdss_device_is_enabled(dssdev))
|
|
return;
|
|
|
|
in->ops.hdmi->disable(in);
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
|
|
}
|
|
|
|
static void hdmic_set_timings(struct omap_dss_device *dssdev,
|
|
struct videomode *vm)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
ddata->vm = *vm;
|
|
dssdev->panel.vm = *vm;
|
|
|
|
in->ops.hdmi->set_timings(in, vm);
|
|
}
|
|
|
|
static void hdmic_get_timings(struct omap_dss_device *dssdev,
|
|
struct videomode *vm)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
|
|
*vm = ddata->vm;
|
|
}
|
|
|
|
static int hdmic_check_timings(struct omap_dss_device *dssdev,
|
|
struct videomode *vm)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
return in->ops.hdmi->check_timings(in, vm);
|
|
}
|
|
|
|
static int hdmic_read_edid(struct omap_dss_device *dssdev,
|
|
u8 *edid, int len)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
return in->ops.hdmi->read_edid(in, edid, len);
|
|
}
|
|
|
|
static bool hdmic_detect(struct omap_dss_device *dssdev)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
if (gpio_is_valid(ddata->hpd_gpio))
|
|
return gpio_get_value_cansleep(ddata->hpd_gpio);
|
|
else
|
|
return in->ops.hdmi->detect(in);
|
|
}
|
|
|
|
static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
|
|
}
|
|
|
|
static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
|
|
const struct hdmi_avi_infoframe *avi)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
return in->ops.hdmi->set_infoframe(in, avi);
|
|
}
|
|
|
|
static struct omap_dss_driver hdmic_driver = {
|
|
.connect = hdmic_connect,
|
|
.disconnect = hdmic_disconnect,
|
|
|
|
.enable = hdmic_enable,
|
|
.disable = hdmic_disable,
|
|
|
|
.set_timings = hdmic_set_timings,
|
|
.get_timings = hdmic_get_timings,
|
|
.check_timings = hdmic_check_timings,
|
|
|
|
.get_resolution = omapdss_default_get_resolution,
|
|
|
|
.read_edid = hdmic_read_edid,
|
|
.detect = hdmic_detect,
|
|
.set_hdmi_mode = hdmic_set_hdmi_mode,
|
|
.set_hdmi_infoframe = hdmic_set_infoframe,
|
|
};
|
|
|
|
static int hdmic_probe_of(struct platform_device *pdev)
|
|
{
|
|
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct omap_dss_device *in;
|
|
int gpio;
|
|
|
|
/* HPD GPIO */
|
|
gpio = of_get_named_gpio(node, "hpd-gpios", 0);
|
|
if (gpio_is_valid(gpio))
|
|
ddata->hpd_gpio = gpio;
|
|
else
|
|
ddata->hpd_gpio = -ENODEV;
|
|
|
|
in = omapdss_of_find_source_for_first_ep(node);
|
|
if (IS_ERR(in)) {
|
|
dev_err(&pdev->dev, "failed to find video source\n");
|
|
return PTR_ERR(in);
|
|
}
|
|
|
|
ddata->in = in;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hdmic_probe(struct platform_device *pdev)
|
|
{
|
|
struct panel_drv_data *ddata;
|
|
struct omap_dss_device *dssdev;
|
|
int r;
|
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (!ddata)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, ddata);
|
|
ddata->dev = &pdev->dev;
|
|
|
|
if (!pdev->dev.of_node)
|
|
return -ENODEV;
|
|
|
|
r = hdmic_probe_of(pdev);
|
|
if (r)
|
|
return r;
|
|
|
|
if (gpio_is_valid(ddata->hpd_gpio)) {
|
|
r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
|
|
GPIOF_DIR_IN, "hdmi_hpd");
|
|
if (r)
|
|
goto err_reg;
|
|
}
|
|
|
|
ddata->vm = hdmic_default_vm;
|
|
|
|
dssdev = &ddata->dssdev;
|
|
dssdev->driver = &hdmic_driver;
|
|
dssdev->dev = &pdev->dev;
|
|
dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
|
|
dssdev->owner = THIS_MODULE;
|
|
dssdev->panel.vm = hdmic_default_vm;
|
|
|
|
r = omapdss_register_display(dssdev);
|
|
if (r) {
|
|
dev_err(&pdev->dev, "Failed to register panel\n");
|
|
goto err_reg;
|
|
}
|
|
|
|
return 0;
|
|
err_reg:
|
|
omap_dss_put_device(ddata->in);
|
|
return r;
|
|
}
|
|
|
|
static int __exit hdmic_remove(struct platform_device *pdev)
|
|
{
|
|
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
|
|
struct omap_dss_device *dssdev = &ddata->dssdev;
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
omapdss_unregister_display(&ddata->dssdev);
|
|
|
|
hdmic_disable(dssdev);
|
|
hdmic_disconnect(dssdev);
|
|
|
|
omap_dss_put_device(in);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id hdmic_of_match[] = {
|
|
{ .compatible = "omapdss,hdmi-connector", },
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, hdmic_of_match);
|
|
|
|
static struct platform_driver hdmi_connector_driver = {
|
|
.probe = hdmic_probe,
|
|
.remove = __exit_p(hdmic_remove),
|
|
.driver = {
|
|
.name = "connector-hdmi",
|
|
.of_match_table = hdmic_of_match,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(hdmi_connector_driver);
|
|
|
|
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
|
|
MODULE_DESCRIPTION("HDMI Connector driver");
|
|
MODULE_LICENSE("GPL");
|