Add compatible string for the DisplayPort controller found on the
Qualcomm QCS8300 SoC.

The Qualcomm QCS8300 platform comes with one DisplayPort controller
that supports 4 MST streams.

Signed-off-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com>
---
 .../bindings/display/msm/dp-controller.yaml        | 26 +++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index 68a6fd27506fda004e53174db5bcc88a29e8d2a6..4da22a211442b7abe2dc18e769d8fd14d224eb40 100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -18,6 +18,7 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - qcom,qcs8300-dp
           - qcom,sa8775p-dp
           - qcom,sc7180-dp
           - qcom,sc7280-dp
@@ -179,6 +180,7 @@ allOf:
           compatible:
             contains:
               enum:
+                - qcom,qcs8300-dp
                 - qcom,sa8775p-dp
                 - qcom,x1e80100-dp
       then:
@@ -241,11 +243,25 @@ allOf:
               minItems: 5
               maxItems: 6
         else:
-          # Default to 2 streams MST
-          properties:
-            clocks:
-              minItems: 6
-              maxItems: 6
+          if:
+            properties:
+              compatible:
+                contains:
+                  enum:
+                    # QCS8300 only has one DP controller that supports 4
+                    # streams MST.
+                    - qcom,qcs8300-dp
+          then:
+            properties:
+              clocks:
+                minItems: 8
+                maxItems: 8
+          else:
+            # Default to 2 streams MST
+            properties:
+              clocks:
+                minItems: 6
+                maxItems: 6
 
 
 additionalProperties: false

-- 
2.34.1

On Mon, Aug 25, 2025 at 11:34:21AM +0800, Yongxing Mou wrote:
> Add compatible string for the DisplayPort controller found on the
> Qualcomm QCS8300 SoC.
> 
> The Qualcomm QCS8300 platform comes with one DisplayPort controller
> that supports 4 MST streams.
> 
> Signed-off-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com>
> ---
>  .../bindings/display/msm/dp-controller.yaml        | 26 +++++++++++++++++-----
>  1 file changed, 21 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> index 68a6fd27506fda004e53174db5bcc88a29e8d2a6..4da22a211442b7abe2dc18e769d8fd14d224eb40 100644
> --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> @@ -18,6 +18,7 @@ properties:
>    compatible:
>      oneOf:
>        - enum:
> +          - qcom,qcs8300-dp
>            - qcom,sa8775p-dp
>            - qcom,sc7180-dp
>            - qcom,sc7280-dp
> @@ -179,6 +180,7 @@ allOf:
>            compatible:
>              contains:
>                enum:
> +                - qcom,qcs8300-dp
>                  - qcom,sa8775p-dp
>                  - qcom,x1e80100-dp
>        then:
> @@ -241,11 +243,25 @@ allOf:
>                minItems: 5
>                maxItems: 6
>          else:
> -          # Default to 2 streams MST
> -          properties:
> -            clocks:
> -              minItems: 6
> -              maxItems: 6
> +          if:

Please do not nest if:then:if:then. It gets unreadable very fast.

I don't even understand why you need this. The code does not exist in
the next, either. That does not help.

Best regards,
Krzysztof

On Thu, Aug 28, 2025 at 09:36:24AM +0200, Krzysztof Kozlowski wrote:
> On Mon, Aug 25, 2025 at 11:34:21AM +0800, Yongxing Mou wrote:
> > Add compatible string for the DisplayPort controller found on the
> > Qualcomm QCS8300 SoC.
> > 
> > The Qualcomm QCS8300 platform comes with one DisplayPort controller
> > that supports 4 MST streams.
> > 
> > Signed-off-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com>
> > ---
> >  .../bindings/display/msm/dp-controller.yaml        | 26 +++++++++++++++++-----
> >  1 file changed, 21 insertions(+), 5 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> > index 68a6fd27506fda004e53174db5bcc88a29e8d2a6..4da22a211442b7abe2dc18e769d8fd14d224eb40 100644
> > --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> > +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> > @@ -18,6 +18,7 @@ properties:
> >    compatible:
> >      oneOf:
> >        - enum:
> > +          - qcom,qcs8300-dp
> >            - qcom,sa8775p-dp
> >            - qcom,sc7180-dp
> >            - qcom,sc7280-dp
> > @@ -179,6 +180,7 @@ allOf:
> >            compatible:
> >              contains:
> >                enum:
> > +                - qcom,qcs8300-dp
> >                  - qcom,sa8775p-dp
> >                  - qcom,x1e80100-dp
> >        then:
> > @@ -241,11 +243,25 @@ allOf:
> >                minItems: 5
> >                maxItems: 6
> >          else:
> > -          # Default to 2 streams MST
> > -          properties:
> > -            clocks:
> > -              minItems: 6
> > -              maxItems: 6
> > +          if:
> 
> Please do not nest if:then:if:then. It gets unreadable very fast.
> 
> I don't even understand why you need this. The code does not exist in
> the next, either. That does not help.

I picked up the MST bindings patchset, so the code should be in linux-next
soon. It already contains nested if-then-else which defines the number
of MST streams available on the platform (R-B'ed by RobH). If you think
that we should remove the nested if's I'd repost the bindings series
first.

-- 
With best wishes
Dmitry