drm: bridge: analogix/dp: try force hpd after plug in lookup failed
Some edp screen do not have hpd signal, so we can't just return
failed when hpd plug in detect failed.
This is an hardware property, so we need add a devicetree property
"analogix,need-force-hpd" to indicate this sutiation.
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Caesar Wang <wxt@rock-chips.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
diff --git a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
index 7659a7a..4f2ba8c 100644
--- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
+++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
@@ -22,6 +22,9 @@
from general PHY binding: Should be "dp".
Optional properties for dp-controller:
+ -force-hpd:
+ Indicate driver need force hpd when hpd detect failed, this
+ is used for some eDP screen which don't have hpd signal.
-hpd-gpios:
Hotplug detect GPIO.
Indicates which GPIO should be used for hotplug detection
@@ -31,7 +34,6 @@
* Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
* Documentation/devicetree/bindings/video/analogix_dp-rockchip.txt
-
[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
-------------------------------------------------------------------------------
diff --git a/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt b/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
index 4fa8aca..ade5d8e 100644
--- a/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
+++ b/Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
@@ -56,6 +56,7 @@
-phys (required)
-phy-names (required)
-hpd-gpios (optional)
+ force-hpd (optional)
Deprecated properties for DisplayPort:
-interlaced: deprecated prop that can parsed from drm_display_mode.
diff --git a/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
index 04d99e3..e832ff9 100644
--- a/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
+++ b/Documentation/devicetree/bindings/display/rockchip/analogix_dp-rockchip.txt
@@ -32,6 +32,7 @@
- phys (required)
- phy-names (required)
- hpd-gpios (optional)
+- force-hpd (optional)
-------------------------------------------------------------------------------
Example: