dt-bindings: display: tegra: Allow dma-coherent on Tegra194 and later

Tegra194 and later chips have a coherency fabric, so some devices can be marked as DMA coherent to avoid unnecessary cache maintenance. Reviewed-by: Krzysztof Kozlowski <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
wafgo · Apr 26, 2024 · 22b92b2 · 22b92b2
1 parent 4cece76
commit 22b92b2
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml
@@ -177,6 +177,15 @@ allOf:
 
       required:
         - reg-names
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra194-host1x
+    then:
+      properties:
+        dma-coherent: true
   - if:
       properties:
         compatible:
@@ -226,6 +235,8 @@ allOf:
             use. Should be a mapping of IDs 0..n to IOMMU entries corresponding to
             usable stream IDs.
 
+        dma-coherent: true
+
       required:
         - reg-names