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

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Message-ID: <78f5ee0cc543aa4406c15fcafa50f2e8@manjaro.org>
Date: Tue, 26 Mar 2024 20:57:16 +0100
From: Dragan Simic <dsimic@...jaro.org>
To: Sebastian Reichel <sebastian.reichel@...labora.com>
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

Hello Sebastian,

On 2024-03-26 20:54, Sebastian Reichel wrote:
> 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>

Great, thanks for your review!

>>  .../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;
> 
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

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