Re: [PATCH] arm64: dts: qcom: mahua-t14s: Enable GPU and GMU

[Akhil P Oommen]

On 11/2/2026 7:58 PM, Lukas Märdian wrote:
> The GPU and GMU were disabled when the ThinkPad T14s Gen 7 device tree
> was introduced, as the Adreno X2-85 found in the Mahua SoC was not
> supported yet. Until then, mahua.dtsi inherited the GPU and GMU nodes
> from glymur.dtsi unchanged, describing them as Glymur's larger Adreno
> X2-90, which is not what the Mahua hardware is.
> 
> Mahua's own GPU is now described: mahua.dtsi overrides the compatibles
> with "qcom,adreno-44060000" and "qcom,adreno-gmu-x285.0", and the msm
> driver carries a matching Adreno X2-85 entry. With that, the nodes
> work as-is on this laptop, so drop the board-level overrides and let
> them inherit the default enabled status.
> 
> Tested on a ThinkPad T14s Gen 7 (LCD): the GPU and GMU bind, the
> gen80100 SQE/AQE/GMU firmware loads (GMU firmware v5.2.38), and Mesa
> 26.3.0-rc2 reports "Adreno (TM) X2-85" for both OpenGL 4.6 (freedreno)
> and Vulkan (turnip).
> 
> Assisted-by: LLM
> Signed-off-by: Lukas Märdian <lukas.maerdian@xxxxxxxxxxxxxxxx>
> ---
> This depends on the Mahua GPU support series, specifically
> "drm/msm/a8xx: Add Mahua GPU support" and "arm64: dts: qcom: mahua:
> Support GPU and GMU", which are not merged yet:
> https://lore.kernel.org/all/20260925-mahua-gpu-v1-0-0fa0bfd8d315@xxxxxxxxxxxxxxxx/
> 
>  .../dts/qcom/mahua-lenovo-thinkpad-t14s-gen7-lcd.dts     | 9 ---------
>  1 file changed, 9 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/mahua-lenovo-thinkpad-t14s-gen7-lcd.dts b/arch/arm64/boot/dts/qcom/mahua-lenovo-thinkpad-t14s-gen7-lcd.dts
> index 255857cda9b..189dc3fe542 100644
> --- a/arch/arm64/boot/dts/qcom/mahua-lenovo-thinkpad-t14s-gen7-lcd.dts
> +++ b/arch/arm64/boot/dts/qcom/mahua-lenovo-thinkpad-t14s-gen7-lcd.dts
> @@ -693,15 +693,6 @@ vreg_l4h_e0_1p2: ldo4 {
>  	};
>  };
>  
> -/* GPU/GMU not fully functional yet on this platform. */
> -&gmu {
> -	status = "disabled";
> -};
> -
> -&gpu {
> -	status = "disabled";
> -};
> -
>  &i2c0 {
>  	clock-frequency = <400000>;
>  

Reviewed-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>

-Akhil.