dt-bindings: display: mediatek: dpi: correct power-domains property

The MediaTek DPI module is typically associated with one of the
following multimedia power domains:
 - POWER_DOMAIN_DISPLAY
 - POWER_DOMAIN_VDOSYS
 - POWER_DOMAIN_MM
The specific power domain used varies depending on the SoC design.

These power domains are shared by multiple devices within the SoC.
In most cases, these power domains are enabled by other devices.
As a result, the DPI module of legacy SoCs often functions correctly
even without explicit configuration.

It is recommended to explicitly add the appropriate power domain
property to the DPI node in the device tree. Hence drop the
compatible checking for specific SoCs.

Fixes: 5474d49 ("dt-bindings: display: mediatek: dpi: Add power domains")
Signed-off-by: Macpaul Lin <[email protected]>
Signed-off-by: Jitao Shi <[email protected]>
Signed-off-by: Pablo Sun <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>

Author: macpaul-lin-mtk

Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml

@@ -63,6 +63,16 @@ properties:
       - const: sleep
 
   power-domains:
+    description: |
+      The MediaTek DPI module is typically associated with one of the
+      following multimedia power domains:
+        POWER_DOMAIN_DISPLAY
+        POWER_DOMAIN_VDOSYS
+        POWER_DOMAIN_MM
+      The specific power domain used varies depending on the SoC design.
+
+      It is recommended to explicitly add the appropriate power domain
+      property to the DPI node in the device tree.
     maxItems: 1
 
   port:
@@ -79,20 +89,6 @@ required:
   - clock-names
   - port
 
-allOf:
-  - if:
-      not:
-        properties:
-          compatible:
-            contains:
-              enum:
-                - mediatek,mt6795-dpi
-                - mediatek,mt8173-dpi
-                - mediatek,mt8186-dpi
-    then:
-      properties:
-        power-domains: false
-
 additionalProperties: false
 
 examples: