[PATCH v3 1/3] dt-bindings: display: msm: Add INT2 GDSC to Kaanapali DPU

[Yongxing Mou]

Kaanapali (SM8850) has two display GDSCs. CORE_GDSC supplies shared
MDSS hardware and most of the DPU, while INT2 GDSC supplies the
VIG2/VIG3/DMA5 source pipes. Without INT2 GDSC, these source pipes
remain inaccessible.

Describe CORE and INT2 as power domains of the DPU device, matching
the hardware partitioning. INT2 only supplies DPU-local source pipes,
while CORE also remains attached to the parent MDSS device because it
supplies shared MDSS hardware. DPU performance-state votes on CORE are
propagated through the genpd hierarchy to its parent MMCX domain.

Restrict the two-domain schema to the Kaanapali DPU compatible, so other
platforms sharing qcom,sm8650-dpu.yaml retain the existing single
power-domain constraint.

Signed-off-by: Yongxing Mou <yongxing.mou@xxxxxxxxxxxxxxxx>
---
 .../devicetree/bindings/display/msm/dpu-common.yaml | 19 +++++++++++++++++--
 .../bindings/display/msm/qcom,kaanapali-mdss.yaml   |  4 +++-
 .../bindings/display/msm/qcom,sm8650-dpu.yaml       | 21 +++++++++++++++++++++
 3 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dpu-common.yaml b/Documentation/devicetree/bindings/display/msm/dpu-common.yaml
index 3f953aa5e694..19b791a857b5 100644
--- a/Documentation/devicetree/bindings/display/msm/dpu-common.yaml
+++ b/Documentation/devicetree/bindings/display/msm/dpu-common.yaml
@@ -25,8 +25,7 @@ properties:
   interrupts:
     maxItems: 1
 
-  power-domains:
-    maxItems: 1
+  power-domains: true
 
   operating-points-v2: true
   opp-table:
@@ -53,4 +52,20 @@ required:
   - operating-points-v2
   - ports
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,kaanapali-dpu
+    then:
+      properties:
+        power-domains:
+          minItems: 2
+          maxItems: 2
+    else:
+      properties:
+        power-domains:
+          maxItems: 1
+
 additionalProperties: true
diff --git a/Documentation/devicetree/bindings/display/msm/qcom,kaanapali-mdss.yaml b/Documentation/devicetree/bindings/display/msm/qcom,kaanapali-mdss.yaml
index 9f935defd6b1..6d6391970d6b 100644
--- a/Documentation/devicetree/bindings/display/msm/qcom,kaanapali-mdss.yaml
+++ b/Documentation/devicetree/bindings/display/msm/qcom,kaanapali-mdss.yaml
@@ -125,7 +125,9 @@ examples:
 
             operating-points-v2 = <&mdp_opp_table>;
 
-            power-domains = <&rpmhpd RPMHPD_MMCX>;
+            power-domains = <&mdss_gdsc>,
+                            <&mdss_int2_gdsc>;
+            power-domain-names = "core", "int2";
 
             ports {
                 #address-cells = <1>;
diff --git a/Documentation/devicetree/bindings/display/msm/qcom,sm8650-dpu.yaml b/Documentation/devicetree/bindings/display/msm/qcom,sm8650-dpu.yaml
index aa0cf0ec5b93..512143402083 100644
--- a/Documentation/devicetree/bindings/display/msm/qcom,sm8650-dpu.yaml
+++ b/Documentation/devicetree/bindings/display/msm/qcom,sm8650-dpu.yaml
@@ -61,6 +61,27 @@ required:
   - clocks
   - clock-names
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,kaanapali-dpu
+    then:
+      properties:
+        power-domains:
+          items:
+            - description: CORE GDSC power domain
+            - description: INT2 GDSC power domain
+
+        power-domain-names:
+          items:
+            - const: core
+            - const: int2
+
+      required:
+        - power-domain-names
+
 unevaluatedProperties: false
 
 examples:

-- 
2.43.0