[PATCH] ARM: dts: bcm2835: Enable 3D rendering through V3D

[Krzysztof Kozlowski]

On 12/04/2024 15:25, Maíra Canal wrote:
> RPi 0-3 is packed with a GPU that provides 3D rendering capabilities to
> the RPi. Currently, the downstream kernel uses an overlay to enable the
> GPU and use GPU hardware acceleration. When deploying a mainline kernel
> to the RPi 0-3, we end up without any GPU hardware acceleration
> (essentially, we can't use the OpenGL driver).
> 
> Therefore, enable the V3D core for the RPi 0-3 in the mainline kernel.
> 
> Signed-off-by: Maíra Canal <mcanal at igalia.com>
> ---
> 
> I decided to add the status property to the `bcm2835-common.dtsi`, but
> there are two other options:
> 
> 1. To add the status property to the `bcm2835-rpi-common.dtsi` file
> 2. To add the status property to each individual RPi model, e.g.
> `bcm2837-rpi-3-b.dts`.
> 
> Let me know which option is more suitable, and if `bcm2835-common.dtsi`
> is not the best option, I can send a v2.
> 
> Best Regards,
> - Maíra
> 
>  arch/arm/boot/dts/broadcom/bcm2835-common.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi b/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi
> index 9261b67dbee1..851a6bce1939 100644
> --- a/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi
> +++ b/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi
> @@ -139,6 +139,7 @@ v3d: v3d at 7ec00000 {
>  			compatible = "brcm,bcm2835-v3d";
>  			reg = <0x7ec00000 0x1000>;
>  			interrupts = <1 10>;
> +			status = "okay";

Please point me where this is being disabled? Could not find.

Anyway, enabling should be done in last place of override/extend, which
provides additional properties. I believe it is being extend further, so
that's not the place.

Best regards,
Krzysztof