This is a note to let you know that I've just added the patch titled
imx-drm: fix hdmi hotplug detection initial state
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
imx-drm-fix-hdmi-hotplug-detection-initial-state.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 98dbeadaf050335df8655d8d9be7a324b6cd896e Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Date: Fri, 18 Apr 2014 10:46:45 +0100
Subject: imx-drm: fix hdmi hotplug detection initial state
From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
commit 98dbeadaf050335df8655d8d9be7a324b6cd896e upstream.
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@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/imx-drm/imx-hdmi.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
--- 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;
@@ -1382,7 +1380,9 @@ static enum drm_connector_status imx_hdm
{
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)
@@ -1524,7 +1524,6 @@ static irqreturn_t imx_hdmi_irq(int irq,
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");
@@ -1532,7 +1531,6 @@ static irqreturn_t imx_hdmi_irq(int irq,
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);
@@ -1606,7 +1604,6 @@ static int imx_hdmi_bind(struct device *
return -ENOMEM;
hdmi->dev = dev;
- hdmi->connector_status = connector_status_disconnected;
hdmi->sample_rate = 48000;
hdmi->ratio = 100;
Patches currently in stable-queue which might be from rmk+kernel@xxxxxxxxxxxxxxxx are
queue-3.15/imx-drm-fix-hdmi-hotplug-detection-initial-state.patch
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