This is a note to let you know that I've just added the patch titled
arm64: tegra: Update AHUB clock parent and rate on Tegra234
to the 6.5-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-tegra-update-ahub-clock-parent-and-rate-on-tegra234.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e483fe34adab3197558b7284044c1b26f5ede20e Mon Sep 17 00:00:00 2001
From: Sheetal <sheetal@xxxxxxxxxx>
Date: Thu, 29 Jun 2023 10:42:16 +0530
Subject: arm64: tegra: Update AHUB clock parent and rate on Tegra234
From: Sheetal <sheetal@xxxxxxxxxx>
commit e483fe34adab3197558b7284044c1b26f5ede20e upstream.
I2S data sanity tests fail beyond a bit clock frequency of 6.144MHz.
This happens because the AHUB clock rate is too low and it shows
9.83MHz on boot.
The maximum rate of PLLA_OUT0 is 49.152MHz and is used to serve I/O
clocks. It is recommended that AHUB clock operates higher than this.
Thus fix this by using PLLP_OUT0 as parent clock for AHUB instead of
PLLA_OUT0 and fix the rate to 81.6MHz.
Fixes: dc94a94daa39 ("arm64: tegra: Add audio devices on Tegra234")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sheetal <sheetal@xxxxxxxxxx>
Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
Reviewed-by: Mohan Kumar D <mkumard@xxxxxxxxxx>
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/nvidia/tegra234.dtsi | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
@@ -180,7 +180,8 @@
clocks = <&bpmp TEGRA234_CLK_AHUB>;
clock-names = "ahub";
assigned-clocks = <&bpmp TEGRA234_CLK_AHUB>;
- assigned-clock-parents = <&bpmp TEGRA234_CLK_PLLA_OUT0>;
+ assigned-clock-parents = <&bpmp TEGRA234_CLK_PLLP_OUT0>;
+ assigned-clock-rates = <81600000>;
status = "disabled";
#address-cells = <2>;
Patches currently in stable-queue which might be from sheetal@xxxxxxxxxx are
queue-6.5/asoc-tegra-fix-sfc-conversion-for-few-rates.patch
queue-6.5/arm64-tegra-update-ahub-clock-parent-and-rate-on-tegra234.patch
