[v2] Enable display support for STM32MP25

[PATCH v2 01/13] dt-bindings: display: st: add new compatible to LTDC device

Posted by Raphael Gallais-Pou 1 month, 3 weeks ago

The new STMicroelectronics SoC features a display controller similar to
the one used in previous SoCs.  Because there is additional registers,
it is incompatible with existing IPs.

Add the new name to the list of compatible string.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
---
 .../devicetree/bindings/display/st,stm32-ltdc.yaml | 30 ++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml b/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
index d6ea4d62a2cfae26353c9f20a326a4329fed3a2f..33e814f8b85679a09df697246d2f8ccdbfc44223 100644
--- a/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
+++ b/Documentation/devicetree/bindings/display/st,stm32-ltdc.yaml
@@ -12,7 +12,9 @@ maintainers:
 
 properties:
   compatible:
-    const: st,stm32-ltdc
+    enum:
+      - st,stm32-ltdc
+      - st,stm32mp251-ltdc
 
   reg:
     maxItems: 1
@@ -24,11 +26,16 @@ properties:
     minItems: 1
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    maxItems: 4
 
   clock-names:
     items:
       - const: lcd
+      - const: bus
+      - const: ref
+      - const: lvds
+    minItems: 1
 
   resets:
     maxItems: 1
@@ -51,6 +58,25 @@ required:
   - resets
   - port
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - st,stm32-ltdc
+then:
+  properties:
+    clocks:
+      maxItems: 1
+    clock-names:
+      maxItems: 1
+else:
+  properties:
+    clocks:
+      maxItems: 4
+    clock-names:
+      maxItems: 4
+
 additionalProperties: false
 
 examples:

-- 
2.25.1

Re: [PATCH v2 01/13] dt-bindings: display: st: add new compatible to LTDC device

Posted by Krzysztof Kozlowski 1 month, 3 weeks ago

On Tue, Aug 12, 2025 at 03:48:58PM +0200, Raphael Gallais-Pou wrote:
> +else:
> +  properties:
> +    clocks:
> +      maxItems: 4

minItems instead

> +    clock-names:
> +      maxItems: 4

minItems instead

> +
>  additionalProperties: false

Best regards,
Krzysztof

Re: [PATCH v2 01/13] dt-bindings: display: st: add new compatible to LTDC device

Posted by Raphael Gallais-Pou 1 month, 3 weeks ago


On 8/14/25 11:08, Krzysztof Kozlowski wrote:
> On Tue, Aug 12, 2025 at 03:48:58PM +0200, Raphael Gallais-Pou wrote:
>> +else:
>> +  properties:
>> +    clocks:
>> +      maxItems: 4
> minItems instead
>
>> +    clock-names:
>> +      maxItems: 4
> minItems instead

Ack, indeed I wrongly clamped the values here.

Best regards,
Raphaël
>
>> +
>>  additionalProperties: false
> Best regards,
> Krzysztof
>