linux-kernel - Re: [PATCH] arm64: dts: rockchip: quartzpro64: Enable the GPU

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Date: Tue, 26 Mar 2024 20:54:31 +0100
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: Dragan Simic <dsimic@...jaro.org>
Cc: linux-rockchip@...ts.infradead.org, heiko@...ech.de, 
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, robh+dt@...nel.org, 
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, boris.brezillon@...labora.com, 
	linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH] arm64: dts: rockchip: quartzpro64: Enable the GPU

Hi,

On Mon, Mar 25, 2024 at 05:19:04PM +0100, Dragan Simic wrote:
> Following the approach used to enable the Mali GPU on the rk3588-evb1, [1]
> do the same for the Pine64 QuartzPro64, which uses nearly identical hardware
> design as the RK3588 EVB1.
> 
> The slight disadvantage is that the regulator coupling logic requires the
> regulators to be always on, which is also noted in the comments.  This is
> obviously something to be improved at some point in the future, but should
> be fine for now, especially because the QuartzPro64 isn't a battery-powered
> board, so low power consumption isn't paramount.
> 
> [1] https://lore.kernel.org/linux-rockchip/20240325153850.189128-5-sebastian.reichel@collabora.com/
> 
> Signed-off-by: Dragan Simic <dsimic@...jaro.org>
> ---

FWIW

Reviewed-by: Sebastian Reichel <sebastian.reichel@...labora.com>

-- Sebastian

>  .../arm64/boot/dts/rockchip/rk3588-quartzpro64.dts | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-quartzpro64.dts b/arch/arm64/boot/dts/rockchip/rk3588-quartzpro64.dts
> index 67414d72e2b6..68d432c61ea5 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-quartzpro64.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-quartzpro64.dts
> @@ -285,6 +285,12 @@ &gmac0_rgmii_clk
>  	status = "okay";
>  };
>  
> +&gpu {
> +	mali-supply = <&vdd_gpu_s0>;
> +	sram-supply = <&vdd_gpu_mem_s0>;
> +	status = "okay";
> +};
> +
>  &i2c2 {
>  	status = "okay";
>  
> @@ -491,11 +497,15 @@ rk806_dvs3_null: dvs3-null-pins {
>  		regulators {
>  			vdd_gpu_s0: dcdc-reg1 {
>  				regulator-name = "vdd_gpu_s0";
> +				/* regulator coupling requires always-on */
> +				regulator-always-on;
>  				regulator-boot-on;
>  				regulator-enable-ramp-delay = <400>;
>  				regulator-min-microvolt = <550000>;
>  				regulator-max-microvolt = <950000>;
>  				regulator-ramp-delay = <12500>;
> +				regulator-coupled-with = <&vdd_gpu_mem_s0>;
> +				regulator-coupled-max-spread = <10000>;
>  
>  				regulator-state-mem {
>  					regulator-off-in-suspend;
> @@ -545,11 +555,15 @@ regulator-state-mem {
>  
>  			vdd_gpu_mem_s0: dcdc-reg5 {
>  				regulator-name = "vdd_gpu_mem_s0";
> +				/* regulator coupling requires always-on */
> +				regulator-always-on;
>  				regulator-boot-on;
>  				regulator-enable-ramp-delay = <400>;
>  				regulator-min-microvolt = <675000>;
>  				regulator-max-microvolt = <950000>;
>  				regulator-ramp-delay = <12500>;
> +				regulator-coupled-with = <&vdd_gpu_s0>;
> +				regulator-coupled-max-spread = <10000>;
>  
>  				regulator-state-mem {
>  					regulator-off-in-suspend;

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