The Glymur platform has four DisplayPort controllers. All the
controllers support four streams (MST). However, the first three only
have two streams wired up physically to the display subsystem, while the
fourth controller has only one stream (SST).

So add a dedicated clause for Glymur compatible to enforce reg ranges to
describing all four streams while allowing either one pixel clock, for the
third DP controller, or two pixel clocks, for the rest of them.

Cc: stable@vger.kernel.org # v6.19
Fixes: 8f63bf908213 ("dt-bindings: display: msm: Document the Glymur DiplayPort controller")
Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
---
 .../bindings/display/msm/dp-controller.yaml         | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
index ebda78db87a6..02ddfaab5f56 100644
--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
@@ -253,7 +253,6 @@ allOf:
             enum:
               # these platforms support 2 streams MST on some interfaces,
               # others are SST only
-              - qcom,glymur-dp
               - qcom,sc8280xp-dp
               - qcom,x1e80100-dp
     then:
@@ -310,6 +309,26 @@ allOf:
           minItems: 6
           maxItems: 8
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              # these platforms support 2 streams MST on some interfaces,
+              # others are SST only, but all controllers have 4 ports
+              - qcom,glymur-dp
+    then:
+      properties:
+        reg:
+          minItems: 9
+          maxItems: 9
+        clocks:
+          minItems: 5
+          maxItems: 6
+        clocks-names:
+          minItems: 5
+          maxItems: 6
+
 unevaluatedProperties: false
 
 examples:

---
base-commit: 7c21b660e919698b10efa8bdb120f0f9bc3d3832
change-id: 20260227-glymur-fix-dp-bindings-reg-clocks-704d0ccbeef9

Best regards,
--  
Abel Vesa <abel.vesa@oss.qualcomm.com>

On Fri, 27 Feb 2026 16:23:00 +0200, Abel Vesa wrote:
> The Glymur platform has four DisplayPort controllers. All the
> controllers support four streams (MST). However, the first three only
> have two streams wired up physically to the display subsystem, while the
> fourth controller has only one stream (SST).
> 
> So add a dedicated clause for Glymur compatible to enforce reg ranges to
> describing all four streams while allowing either one pixel clock, for the
> third DP controller, or two pixel clocks, for the rest of them.
> 
> Cc: stable@vger.kernel.org # v6.19
> Fixes: 8f63bf908213 ("dt-bindings: display: msm: Document the Glymur DiplayPort controller")
> Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
> ---
>  .../bindings/display/msm/dp-controller.yaml         | 21 ++++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/msm/qcom,glymur-mdss.example.dtb: displayport-controller@ae90000 (qcom,glymur-dp): reg: [[183042048, 512], [183042560, 512], [183043072, 1536], [183046144, 1024], [183047168, 1024]] is too short
	from schema $id: http://devicetree.org/schemas/display/msm/dp-controller.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260227-glymur-fix-dp-bindings-reg-clocks-v1-1-99f7b42b43aa@oss.qualcomm.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

On 26-02-27 10:57:25, Rob Herring (Arm) wrote:
> 
> On Fri, 27 Feb 2026 16:23:00 +0200, Abel Vesa wrote:
> > The Glymur platform has four DisplayPort controllers. All the
> > controllers support four streams (MST). However, the first three only
> > have two streams wired up physically to the display subsystem, while the
> > fourth controller has only one stream (SST).
> > 
> > So add a dedicated clause for Glymur compatible to enforce reg ranges to
> > describing all four streams while allowing either one pixel clock, for the
> > third DP controller, or two pixel clocks, for the rest of them.
> > 
> > Cc: stable@vger.kernel.org # v6.19
> > Fixes: 8f63bf908213 ("dt-bindings: display: msm: Document the Glymur DiplayPort controller")
> > Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
> > ---
> >  .../bindings/display/msm/dp-controller.yaml         | 21 ++++++++++++++++++++-
> >  1 file changed, 20 insertions(+), 1 deletion(-)
> > 
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/msm/qcom,glymur-mdss.example.dtb: displayport-controller@ae90000 (qcom,glymur-dp): reg: [[183042048, 512], [183042560, 512], [183043072, 1536], [183046144, 1024], [183047168, 1024]] is too short
> 	from schema $id: http://devicetree.org/schemas/display/msm/dp-controller.yaml

Yep, I need to fix the qcom,glymur-mdss.yaml as well. Will do in v2.