| Message ID | 20200430124442.v4.2.I1976736b400a3b30e46efa47782248b86b3bc627@changeid (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Prepare to use a GPIO on ti-sn65dsi86 for Hot Plug Detect | expand |
Hi Doug, Thank you for the patch. On Thu, Apr 30, 2020 at 12:46:13PM -0700, Douglas Anderson wrote: > 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> > --- > > Changes in v4: None > Changes in v3: None > Changes in v2: > - ("dt-bindings: display: Add hpd-gpios to panel-common...") new for v2 > > .../devicetree/bindings/display/panel/panel-common.yaml | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/Documentation/devicetree/bindings/display/panel/panel-common.yaml b/Documentation/devicetree/bindings/display/panel/panel-common.yaml > index ed051ba12084..e9a04a3a4f5f 100644 > --- a/Documentation/devicetree/bindings/display/panel/panel-common.yaml > +++ b/Documentation/devicetree/bindings/display/panel/panel-common.yaml > @@ -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
diff --git a/Documentation/devicetree/bindings/display/panel/panel-common.yaml b/Documentation/devicetree/bindings/display/panel/panel-common.yaml index ed051ba12084..e9a04a3a4f5f 100644 --- a/Documentation/devicetree/bindings/display/panel/panel-common.yaml +++ b/Documentation/devicetree/bindings/display/panel/panel-common.yaml @@ -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