6.6-stable review patch. If anyone has any objections, please let me know.
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From: Adam Ford aford173@gmail.com
[ Upstream commit 1f794d3eed5345413c2b0cf1bcccc92d77681220 ]
When the GPU nodes were added, the GPU_PLL_OUT was configured for 1000MHz, but this requires the SoC to run in overdrive mode which requires an elevated voltage operating point.
Since this may run some boards out of spec, the default clock should be set to 800MHz for nominal operating mode. Boards that run at the higher voltage can update their clocks accordingly.
Fixes: 4523be8e46be ("arm64: dts: imx8mm: Add GPU nodes for 2D and 3D core") Signed-off-by: Adam Ford aford173@gmail.com Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/freescale/imx8mm.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi index 738024baaa57..54faf83cb436 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi @@ -1408,7 +1408,7 @@ gpu_3d: gpu@38000000 { assigned-clocks = <&clk IMX8MM_CLK_GPU3D_CORE>, <&clk IMX8MM_GPU_PLL_OUT>; assigned-clock-parents = <&clk IMX8MM_GPU_PLL_OUT>; - assigned-clock-rates = <0>, <1000000000>; + assigned-clock-rates = <0>, <800000000>; power-domains = <&pgc_gpu>; };
@@ -1423,7 +1423,7 @@ gpu_2d: gpu@38008000 { assigned-clocks = <&clk IMX8MM_CLK_GPU2D_CORE>, <&clk IMX8MM_GPU_PLL_OUT>; assigned-clock-parents = <&clk IMX8MM_GPU_PLL_OUT>; - assigned-clock-rates = <0>, <1000000000>; + assigned-clock-rates = <0>, <800000000>; power-domains = <&pgc_gpu>; };