linux-kernel - [PATCH V2 4/4] arm64: dts: imx8mp: Configure VPU clocks for overdrive

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Message-ID: <20250612003924.178251-5-aford173@gmail.com>
Date: Wed, 11 Jun 2025 19:39:22 -0500
From: Adam Ford <aford173@...il.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: aford@...conembedded.com,
	m.felsch@...gutronix.de,
	Adam Ford <aford173@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH V2 4/4] arm64: dts: imx8mp: Configure VPU clocks for overdrive

The defaults for this SoC are configured for overdrive mode, but
the VPU clocks are currently configured for nominal mode.
Increase VPU_G1_CLK_ROOT to 800MHZ from 600MHz,
Increase VPU_G2_CLK_ROOT to 700MHZ from 500MHz, and
Increase VPU_BUS_CLK_ROOT to 800MHz from 600MHz.

This requires adjusting the clock parents. Since there is already
800MHz clock references, move the VPU_BUS and G1 clocks to it.
This frees up the VPU_PLL to be configured at 700MHz to run
the G2 clock at 700MHz.

Signed-off-by: Adam Ford <aford173@...il.com>
---
V2:  Move VPU_PLL assignment into the G2 node, since it's only needed
     for it.

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 909555a5da4b..8884b3fe5e60 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -2256,8 +2256,8 @@ vpu_g1: video-codec@...00000 {
 			interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clk IMX8MP_CLK_VPU_G1_ROOT>;
 			assigned-clocks = <&clk IMX8MP_CLK_VPU_G1>;
-			assigned-clock-parents = <&clk IMX8MP_VPU_PLL_OUT>;
-			assigned-clock-rates = <600000000>;
+			assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_800M>;
+			assigned-clock-rates = <800000000>;
 			power-domains = <&vpumix_blk_ctrl IMX8MP_VPUBLK_PD_G1>;
 		};
 
@@ -2266,9 +2266,9 @@ vpu_g2: video-codec@...10000 {
 			reg = <0x38310000 0x10000>;
 			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clk IMX8MP_CLK_VPU_G2_ROOT>;
-			assigned-clocks = <&clk IMX8MP_CLK_VPU_G2>;
-			assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>;
-			assigned-clock-rates = <500000000>;
+			assigned-clocks = <&clk IMX8MP_CLK_VPU_G2>, <&clk IMX8MP_VPU_PLL_OUT>;
+			assigned-clock-parents = <&clk IMX8MP_VPU_PLL_OUT>;
+			assigned-clock-rates = <700000000>, <700000000>;
 			power-domains = <&vpumix_blk_ctrl IMX8MP_VPUBLK_PD_G2>;
 		};
 
@@ -2283,9 +2283,9 @@ vpumix_blk_ctrl: blk-ctrl@...30000 {
 				 <&clk IMX8MP_CLK_VPU_G2_ROOT>,
 				 <&clk IMX8MP_CLK_VPU_VC8KE_ROOT>;
 			clock-names = "g1", "g2", "vc8000e";
-			assigned-clocks = <&clk IMX8MP_VPU_PLL>, <&clk IMX8MP_CLK_VPU_BUS>;
-			assigned-clock-parents = <0>, <&clk IMX8MP_VPU_PLL_OUT>;
-			assigned-clock-rates = <600000000>, <600000000>;
+			assigned-clocks = <&clk IMX8MP_CLK_VPU_BUS>;
+			assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_800M>;
+			assigned-clock-rates = <800000000>;
 			interconnects = <&noc IMX8MP_ICM_VPU_G1 &noc IMX8MP_ICN_VIDEO>,
 					<&noc IMX8MP_ICM_VPU_G2 &noc IMX8MP_ICN_VIDEO>,
 					<&noc IMX8MP_ICM_VPU_H1 &noc IMX8MP_ICN_VIDEO>;
-- 
2.48.1