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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date: Mon, 25 Mar 2024 17:19:04 +0100
From: Dragan Simic <dsimic@...jaro.org>
To: linux-rockchip@...ts.infradead.org
Cc: 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,
	sebastian.reichel@...labora.com
Subject: [PATCH] arm64: dts: rockchip: quartzpro64: Enable the GPU

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>
---
 .../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;