linux-kernel - [PATCH v2 4/4] arm64: dts: rockchip: rk3588-evb1: Enable GPU

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Date: Tue, 26 Mar 2024 17:52:08 +0100
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: Heiko Stuebner <heiko@...ech.de>,
	linux-rockchip@...ts.infradead.org
Cc: Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel@...labora.com,
	Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCH v2 4/4] arm64: dts: rockchip: rk3588-evb1: Enable GPU

From: Boris Brezillon <boris.brezillon@...labora.com>

Enable the Mali GPU in the RK3588 EVB1.

This marks the GPU regulators as always-on, because the generic
coupler regulator logic from the kernel can only handle them
when they are marked as always-on. Technically it's okay to
disable the regulators, when the GPU is not used.

Considering the RK3588 EVB1 is not battery powered, the slightly
increased power consumption for keeping the regulator always
enabled is not a big deal. Thus it's better to enable GPU support
than wait for a better solution.

Signed-off-by: Boris Brezillon <boris.brezillon@...labora.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-evb1-v10.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3588-evb1-v10.dts
index de30c2632b8e..56c019b25fa8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-evb1-v10.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-evb1-v10.dts
@@ -281,6 +281,12 @@ &gmac0_rgmii_clk
 	status = "okay";
 };
 
+&gpu {
+	mali-supply = <&vdd_gpu_s0>;
+	sram-supply = <&vdd_gpu_mem_s0>;
+	status = "okay";
+};
+
 &i2c2 {
 	status = "okay";
 
@@ -484,12 +490,16 @@ rk806_dvs3_null: dvs3-null-pins {
 
 		regulators {
 			vdd_gpu_s0: dcdc-reg1 {
+				/* regulator coupling requires always-on */
+				regulator-always-on;
 				regulator-boot-on;
 				regulator-min-microvolt = <550000>;
 				regulator-max-microvolt = <950000>;
 				regulator-ramp-delay = <12500>;
 				regulator-name = "vdd_gpu_s0";
 				regulator-enable-ramp-delay = <400>;
+				regulator-coupled-with = <&vdd_gpu_mem_s0>;
+				regulator-coupled-max-spread = <10000>;
 				regulator-state-mem {
 					regulator-off-in-suspend;
 				};
@@ -534,12 +544,16 @@ regulator-state-mem {
 			};
 
 			vdd_gpu_mem_s0: dcdc-reg5 {
+				/* regulator coupling requires always-on */
+				regulator-always-on;
 				regulator-boot-on;
 				regulator-min-microvolt = <675000>;
 				regulator-max-microvolt = <950000>;
 				regulator-ramp-delay = <12500>;
 				regulator-enable-ramp-delay = <400>;
 				regulator-name = "vdd_gpu_mem_s0";
+				regulator-coupled-with = <&vdd_gpu_s0>;
+				regulator-coupled-max-spread = <10000>;
 				regulator-state-mem {
 					regulator-off-in-suspend;
 				};
-- 
2.43.0