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>
diff --git a/drivers/video/fbdev/omap2/displays-new/connector-hdmi.c b/drivers/video/fbdev/omap2/displays-new/connector-hdmi.c
index 29ed21b..4420ccb 100644
--- a/drivers/video/fbdev/omap2/displays-new/connector-hdmi.c
+++ b/drivers/video/fbdev/omap2/displays-new/connector-hdmi.c
@@ -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 device *dev;
struct omap_video_timings timings;
+
+ int hpd_gpio;
};
#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
@@ -161,7 +164,10 @@
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
- return in->ops.hdmi->detect(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_audio_enable(struct omap_dss_device *dssdev)
@@ -288,6 +294,8 @@
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 @@
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 @@
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;