Patch "arm64: dts: imx8mm: Reduce GPU to nominal speed" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    arm64: dts: imx8mm: Reduce GPU to nominal speed

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm64-dts-imx8mm-reduce-gpu-to-nominal-speed.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 75fbd320269d44371f9de746c6f72a0b02b39f05
Author: Adam Ford <aford173@xxxxxxxxx>
Date:   Tue Nov 28 14:02:16 2023 -0600

    arm64: dts: imx8mm: Reduce GPU to nominal speed
    
    [ 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@xxxxxxxxx>
    Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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>;
 		};