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OMAPDSS: connector-hdmi: hpd support 

Add support to handle HPD GPIO in the HDMI connector driver. For the
time being, the driver only uses HPD GPIO to report is the cable is
connected via detect() calll.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2014-04-17 10:18:58 +03:00
parent 905b1383d7
commit 2c75e3cb6e
1 changed files with 24 additions and 1 deletions
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23
drivers/video/fbdev/omap2/displays-new/connector-hdmi.c
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@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <drm/drm_edid.h>
@ -43,6 +44,8 @@ struct panel_drv_data {
struct device *dev;
struct omap_video_timings timings;
int hpd_gpio;
};
#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
@ -161,6 +164,9 @@ 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);
}
@ -288,6 +294,8 @@ static int hdmic_probe_pdata(struct platform_device *pdev)
pdata = dev_get_platdata(&pdev->dev);
ddata->hpd_gpio = -ENODEV;
in = omap_dss_find_output(pdata->source);
if (in == NULL) {
dev_err(&pdev->dev, "Failed to find video source\n");
@ -307,6 +315,14 @@ 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)) {
@ -344,6 +360,13 @@ static int hdmic_probe(struct platform_device *pdev)
return -ENODEV;
}
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->timings = hdmic_default_timings;
dssdev = &ddata->dssdev;