The MediaTek DP hardware supports audio and exposes a DAI, so the
'#sound-dai-cells' property is needed for describing the DAI links.

Reference the dai-common.yaml schema to allow '#sound-dai-cells' to be
used, and filter out non-DP compatibles as MediaTek eDP in the same
binding doesn't support audio.

This fixes dtbs_check error:
  '#sound-dai-cells' does not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Fei Shao <fshao@chromium.org>
---

Changes in v2:
- reference to dai-common.yaml since the hardware exposes DAI
  and update to `unevaluatedProperties: false`
- update commit message

 .../display/mediatek/mediatek,dp.yaml         | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
index 2aef1eb32e11..75ce92f4a5fd 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
@@ -42,6 +42,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  '#sound-dai-cells':
+    const: 0
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
     properties:
@@ -85,7 +88,21 @@ required:
   - ports
   - max-linkrate-mhz
 
-additionalProperties: false
+allOf:
+  - $ref: /schemas/sound/dai-common.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - mediatek,mt8188-dp-tx
+                - mediatek,mt8195-dp-tx
+    then:
+      properties:
+        '#sound-dai-cells': false
+
+unevaluatedProperties: false
 
 examples:
   - |
-- 
2.47.0.277.g8800431eea-goog

Hi, Fei:

Fei Shao <fshao@chromium.org> 於 2024年11月5日 週二 下午5:02寫道：
>
> The MediaTek DP hardware supports audio and exposes a DAI, so the
> '#sound-dai-cells' property is needed for describing the DAI links.
>
> Reference the dai-common.yaml schema to allow '#sound-dai-cells' to be
> used, and filter out non-DP compatibles as MediaTek eDP in the same
> binding doesn't support audio.
>
> This fixes dtbs_check error:
>   '#sound-dai-cells' does not match any of the regexes: 'pinctrl-[0-9]+'

Applied to mediatek-drm-fixes [1], thanks.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-fixes

Regards,
Chun-Kuang.

>
> Signed-off-by: Fei Shao <fshao@chromium.org>
> ---
>
> Changes in v2:
> - reference to dai-common.yaml since the hardware exposes DAI
>   and update to `unevaluatedProperties: false`
> - update commit message
>
>  .../display/mediatek/mediatek,dp.yaml         | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
> index 2aef1eb32e11..75ce92f4a5fd 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dp.yaml
> @@ -42,6 +42,9 @@ properties:
>    interrupts:
>      maxItems: 1
>
> +  '#sound-dai-cells':
> +    const: 0
> +
>    ports:
>      $ref: /schemas/graph.yaml#/properties/ports
>      properties:
> @@ -85,7 +88,21 @@ required:
>    - ports
>    - max-linkrate-mhz
>
> -additionalProperties: false
> +allOf:
> +  - $ref: /schemas/sound/dai-common.yaml#
> +  - if:
> +      not:
> +        properties:
> +          compatible:
> +            contains:
> +              enum:
> +                - mediatek,mt8188-dp-tx
> +                - mediatek,mt8195-dp-tx
> +    then:
> +      properties:
> +        '#sound-dai-cells': false
> +
> +unevaluatedProperties: false
>
>  examples:
>    - |
> --
> 2.47.0.277.g8800431eea-goog
>

On Tue, 05 Nov 2024 17:00:28 +0800, Fei Shao wrote:
> The MediaTek DP hardware supports audio and exposes a DAI, so the
> '#sound-dai-cells' property is needed for describing the DAI links.
> 
> Reference the dai-common.yaml schema to allow '#sound-dai-cells' to be
> used, and filter out non-DP compatibles as MediaTek eDP in the same
> binding doesn't support audio.
> 
> This fixes dtbs_check error:
>   '#sound-dai-cells' does not match any of the regexes: 'pinctrl-[0-9]+'
> 
> Signed-off-by: Fei Shao <fshao@chromium.org>
> ---
> 
> Changes in v2:
> - reference to dai-common.yaml since the hardware exposes DAI
>   and update to `unevaluatedProperties: false`
> - update commit message
> 
>  .../display/mediatek/mediatek,dp.yaml         | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>