Update the img,powervr-rogue.yaml device tree bindings to include the
T-HEAD TH1520 SoC's specific GPU compatible string.

The thead,th1520-gpu compatible, along with its full chain
img,img-bxm-4-64, and img,img-rogue, is added to the
list of recognized GPU types. This allows the Imagination DRM driver
to correctly bind to the GPU node defined in the TH1520 device tree.

The power-domains property requirement for img,img-bxm-4-64 is also
ensured by adding it to the relevant allOf condition.

Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
---
 Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
index 4450e2e73b3ccf74d29f0e31e2e6687d7cbe5d65..c12837a0d39b8c3043b9133d444cc33a59135c33 100644
--- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
+++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
@@ -26,6 +26,11 @@ properties:
               - ti,j721s2-gpu
           - const: img,img-bxs-4-64
           - const: img,img-rogue
+      - items:
+          - enum:
+              - thead,th1520-gpu
+          - const: img,img-bxm-4-64
+          - const: img,img-rogue
 
       # This legacy combination of compatible strings was introduced early on
       # before the more specific GPU identifiers were used.
@@ -93,7 +98,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: img,img-axe-1-16m
+            enum:
+              - img,img-axe-1-16m
+              - img,img-bxm-4-64
     then:
       properties:
         power-domains:

-- 
2.34.1

On Fri, May 30, 2025 at 12:23:51AM GMT, Michal Wilczynski wrote:
> Update the img,powervr-rogue.yaml device tree bindings to include the
> T-HEAD TH1520 SoC's specific GPU compatible string.
> 
> The thead,th1520-gpu compatible, along with its full chain
> img,img-bxm-4-64, and img,img-rogue, is added to the
> list of recognized GPU types. This allows the Imagination DRM driver
> to correctly bind to the GPU node defined in the TH1520 device tree.

If there is going to be any new version:

Last sentence feels redundant or obvious. That's the point of DT anyway,
so not need to state that. I suggest dropping it or replacing with some
hardware description.

A nit, subject: drop second/last, redundant "to Imagination bindings". The
"dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18
Use proper prefix, so:
dt-bindings: gpu: img,powervr-rogue: Add foo bar

> 
> The power-domains property requirement for img,img-bxm-4-64 is also
> ensured by adding it to the relevant allOf condition.
> 
> Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
> ---
>  Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
> index 4450e2e73b3ccf74d29f0e31e2e6687d7cbe5d65..c12837a0d39b8c3043b9133d444cc33a59135c33 100644
> --- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
> +++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
> @@ -26,6 +26,11 @@ properties:
>                - ti,j721s2-gpu
>            - const: img,img-bxs-4-64
>            - const: img,img-rogue
> +      - items:
> +          - enum:
> +              - thead,th1520-gpu
> +          - const: img,img-bxm-4-64

We keep ordering by fallbacks, so this should go above items with
img,img-bxs-4-64 fallback (m < s).

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof