Re: [PATCH] arm64: dts: rockchip: Fix wrong register range of rk3576 gpu

[Nicolas Frattaroli]

On Tuesday, 30 December 2025 10:02:46 Central European Standard Time Chaoyi Chen wrote:
> From: Chaoyi Chen <chaoyi.chen@xxxxxxxxxxxxxx>
> 
> According to RK3576 TRM part1 page13, the size of the GPU registers
> is 128 KB.
> 
> Fixes: 57b1ce903966 ("arm64: dts: rockchip: Add rk3576 SoC base DT")
> Signed-off-by: Chaoyi Chen <chaoyi.chen@xxxxxxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/rockchip/rk3576.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3576.dtsi b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> index 6284e7bdc442..b375015f0662 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
> @@ -1271,7 +1271,7 @@ power-domain@RK3576_PD_VO1 {
>  
>  		gpu: gpu@27800000 {
>  			compatible = "rockchip,rk3576-mali", "arm,mali-bifrost";
> -			reg = <0x0 0x27800000 0x0 0x200000>;
> +			reg = <0x0 0x27800000 0x0 0x20000>;
>  			assigned-clocks = <&scmi_clk SCMI_CLK_GPU>;
>  			assigned-clock-rates = <198000000>;
>  			clocks = <&cru CLK_GPU>;
> 

This is only true if you only consider the GPU_CONTROL and
JOB_CONTROL register ranges, and leave out the MMU_STAGE1
and MMU_STAGE2 ranges. I don't know if those need to be
mapped, since the MMU control registers are < 0x2000.

What do other bifrost devices do?

Kind regards,
Nicolas Frattaroli