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imx-drm: fix hdmi hotplug detection initial state

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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>
This commit is contained in:
Russell King 2014-04-18 10:46:45 +01:00 committed by Greg Kroah-Hartman
parent 60d857bffc
commit 98dbeadaf0
1 changed files with 3 additions and 6 deletions
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9
drivers/staging/imx-drm/imx-hdmi.c
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@ -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;