Re: [PATCH v2 3/3] dt-bindings: display/msm: Require DSI graph endpoint

[Dmitry Baryshkov]

On Wed, Nov 11, 2026 at 06:45:02PM +0100, Krzysztof Kozlowski wrote:
> Technically, DSI controllers do not need OF graphs with endpoint to the
> panel and could rely directly on their child node (when panel is the
> child of DSI).
> 
> However Linux Qualcomm MSM DRM DSI driver never implemented such
> approach and it requires a valid graph endpoint pointing to the panel.
> If it is missing, the drivers will silently accept such DTS in
> dsi_host_parse_dt(), but later fail on dsi_host_attach() because number
> of lanes is not initialized.  The number of lanes is initialized to safe
> default only when there is a valid endpoint which is missing data-lanes.
> 
> Extend the bindings to validate existing DTS to match expected ABI.
> 
> Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxxxxx>
> 
> ---
> 
> Please apply after Qualcomm Soc takes DTS changes to next.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>


-- 
With best wishes
Dmitry