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drm: bridge: analogix/dp: try force hpd after plug in lookup failed

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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>
This commit is contained in:
Yakir Yang
2016-02-15 19:11:15 +08:00
parent 0d0abd894e
commit 5cff007c58
6 changed files with 46 additions and 6 deletions
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4
Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
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@@ -22,6 +22,9 @@ Required properties for dp-controller:
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 @@ Optional properties for dp-controller:
* Documentation/devicetree/bindings/display/exynos/exynos_dp.txt
* Documentation/devicetree/bindings/video/analogix_dp-rockchip.txt
[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
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