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dt-bindings: display: Add hpd-gpios to panel-common bindings

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In the cases where there is no connector in a system there's no great
place to put "hpd-gpios".  As per discussion [1] the best place to put
it is in the panel.  Add this to the device tree bindings.

[1] https://lore.kernel.org/r/20200417180819.GE5861@pendragon.ideasonboard.com

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200507143354.v5.2.I1976736b400a3b30e46efa47782248b86b3bc627@changeid
This commit is contained in:
Douglas Anderson 2020-05-07 14:34:56 -07:00 committed by Sam Ravnborg
parent cfe40d0223
commit d252830652
1 changed files with 6 additions and 0 deletions
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6
Documentation/devicetree/bindings/display/panel/panel-common.yaml
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@ -96,6 +96,12 @@ properties:
(hot plug detect) signal, but the signal isn't hooked up so we should
hardcode the max delay from the panel spec when powering up the panel.
hpd-gpios:
maxItems: 1
description:
If Hot Plug Detect (HPD) is connected to a GPIO in the system rather
than a dedicated HPD pin the pin can be specified here.
# Control I/Os
# Many display panels can be controlled through pins driven by GPIOs. The nature