[PATCH 2/2] dt-bindings: display: Add "disable-hpd" binding
Neil Armstrong
narmstrong at baylibre.com
Mon Feb 8 09:18:00 UTC 2021
Hi,
On 31/01/2021 10:57, Mykyta Poturai wrote:
> Add the "disable-hpd" binding, used to disable hotplug detected
> functionality in the driver. When it's enabled the driver assumes that
> the connector is always connected and disables the hotplug detect
> related IRQ.
DT describes the hardware, not the software behaviour.
So if the HPD is broken, then add a "snps,broken-hpd" instead, or if you want to force output, use the DRM mode forcing, which is handled by the dw-hdmi code:
https://wiki.archlinux.org/index.php/kernel_mode_setting#Forcing_modes
Neil
>
> Signed-off-by: Mykyta Poturai <ddone at aruko.org>
> ---
> .../devicetree/bindings/display/bridge/renesas,dw-hdmi.txt | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt b/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
> index 3f6072651182..b2b899f46b86 100644
> --- a/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
> +++ b/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
> @@ -39,6 +39,7 @@ Optional properties:
>
> - power-domains: Shall reference the power domain that contains the DWC HDMI,
> if any.
> +- disable-hpd: Disables the hotplug detect feature
>
>
> Example:
>
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