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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-04-18 10:46:45 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-04-25 16:13:56 -0700
commit98dbeadaf050335df8655d8d9be7a324b6cd896e (patch)
tree95def35ae0da1bd3d86e9dfbdb241d21608bb26d /drivers/staging/imx-drm
parent60d857bffcac67c77a33c06d8dfe405f3a293d2b (diff)
downloadlinux-stericsson-98dbeadaf050335df8655d8d9be7a324b6cd896e.tar.gz
imx-drm: fix hdmi hotplug detection initial state
The initial state at boot is assumed to be disconnected, and we hope to receive an interrupt to update the status. Let's be more explicit about the current state - reading the PHY status register tells us the current level of the hotplug signal, which we can report back in the _detect() method. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/imx-drm')
-rw-r--r--drivers/staging/imx-drm/imx-hdmi.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/staging/imx-drm/imx-hdmi.c b/drivers/staging/imx-drm/imx-hdmi.c
index 0e638210d827..886a0d49031b 100644
--- a/drivers/staging/imx-drm/imx-hdmi.c
+++ b/drivers/staging/imx-drm/imx-hdmi.c
@@ -120,8 +120,6 @@ struct imx_hdmi {
struct clk *isfr_clk;
struct clk *iahb_clk;
- enum drm_connector_status connector_status;
-
struct hdmi_data_info hdmi_data;
int vic;
@@ -1379,7 +1377,9 @@ static enum drm_connector_status imx_hdmi_connector_detect(struct drm_connector
{
struct imx_hdmi *hdmi = container_of(connector, struct imx_hdmi,
connector);
- return hdmi->connector_status;
+
+ return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
+ connector_status_connected : connector_status_disconnected;
}
static int imx_hdmi_connector_get_modes(struct drm_connector *connector)
@@ -1521,7 +1521,6 @@ static irqreturn_t imx_hdmi_irq(int irq, void *dev_id)
hdmi_modb(hdmi, 0, HDMI_PHY_HPD, HDMI_PHY_POL0);
- hdmi->connector_status = connector_status_connected;
imx_hdmi_poweron(hdmi);
} else {
dev_dbg(hdmi->dev, "EVENT=plugout\n");
@@ -1529,7 +1528,6 @@ static irqreturn_t imx_hdmi_irq(int irq, void *dev_id)
hdmi_modb(hdmi, HDMI_PHY_HPD, HDMI_PHY_HPD,
HDMI_PHY_POL0);
- hdmi->connector_status = connector_status_disconnected;
imx_hdmi_poweroff(hdmi);
}
drm_helper_hpd_irq_event(hdmi->connector.dev);
@@ -1603,7 +1601,6 @@ static int imx_hdmi_bind(struct device *dev, struct device *master, void *data)
return -ENOMEM;
hdmi->dev = dev;
- hdmi->connector_status = connector_status_disconnected;
hdmi->sample_rate = 48000;
hdmi->ratio = 100;