Patch "ARM: dts: meson8: Use a higher default GPU clock frequency" has been added to the 5.14-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    ARM: dts: meson8: Use a higher default GPU clock frequency

to the 5.14-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:
     arm-dts-meson8-use-a-higher-default-gpu-clock-freque.patch
and it can be found in the queue-5.14 subdirectory.

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



commit 9ab00a5be7c14ee4afb47854c2cbc4d52c4f660d
Author: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Date:   Sun Jul 11 23:40:23 2021 +0200

    ARM: dts: meson8: Use a higher default GPU clock frequency
    
    [ Upstream commit 44cf630bcb8c5ec78125805c9447dd5766792224 ]
    
    We are seeing "imprecise external abort (0x1406)" errors during boot
    (which then cause the whole board to hang) on Meson8 (but not Meson8m2).
    These are observed while trying to access the GPU's registers when the
    MALI clock is running at it's default setting of 24MHz. The 3.10 vendor
    kernel uses 318.75MHz as "default" GPU frequency. Using that makes the
    "imprecise external aborts" go away.
    Add the assigned-clocks and assigned-clock-rates properties to also bump
    the MALI clock to 318.75MHz before accessing any of it's registers.
    
    Fixes: 7d3f6b536e72c9 ("ARM: dts: meson8: add the Mali-450 MP6 GPU")
    Reported-by: Demetris Ierokipides <ierokipides.dem@xxxxxxxxx>
    Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
    Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
    Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20210711214023.2163565-1-martin.blumenstingl@xxxxxxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index 157a950a55d3..686c7b7c79d5 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -304,8 +304,13 @@
 					  "pp2", "ppmmu2", "pp4", "ppmmu4",
 					  "pp5", "ppmmu5", "pp6", "ppmmu6";
 			resets = <&reset RESET_MALI>;
+
 			clocks = <&clkc CLKID_CLK81>, <&clkc CLKID_MALI>;
 			clock-names = "bus", "core";
+
+			assigned-clocks = <&clkc CLKID_MALI>;
+			assigned-clock-rates = <318750000>;
+
 			operating-points-v2 = <&gpu_opp_table>;
 			#cooling-cells = <2>; /* min followed by max */
 		};