linux-kernel - [PATCH] arm64: dts: rockchip: Add dynamic-power-coefficient to rk3399 GPU

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Message-Id: <20231127081511.1911706-1-lukasz.luba@arm.com>
Date:   Mon, 27 Nov 2023 08:15:11 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     lukasz.luba@....com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, heiko@...ech.de,
        conor+dt@...nel.org, daniel.lezcano@...aro.org
Subject: [PATCH] arm64: dts: rockchip: Add dynamic-power-coefficient to rk3399 GPU

Add dynamic-power-coefficient to the GPU node. That will create Energy
Model for the GPU based on the coefficient and OPP table information.
It will enable mechanism such as DTMP or IPA to work with the GPU DVFS.
In similar way the Energy Model for CPUs in rk3399 is created, so both
are aligned in power scale. The maximum power used from this coefficient
is 1.5W at 600MHz.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 9da0b6d77c8d..87cfdf570b19 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -2113,6 +2113,7 @@ gpu: gpu@...a0000 {
 		interrupt-names = "job", "mmu", "gpu";
 		clocks = <&cru ACLK_GPU>;
 		#cooling-cells = <2>;
+		dynamic-power-coefficient = <2640>;
 		power-domains = <&power RK3399_PD_GPU>;
 		status = "disabled";
 	};
-- 
2.25.1