This is a note to let you know that I've just added the patch titled
drm/amdgpu/umsch: reinitialize write pointer in hw init
to the 6.8-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:
drm-amdgpu-umsch-reinitialize-write-pointer-in-hw-init.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0f1bbcc2bab25d5fb2dfb1ee3e08131437690d3d Mon Sep 17 00:00:00 2001
From: Lang Yu <Lang.Yu@xxxxxxx>
Date: Mon, 25 Mar 2024 13:24:31 +0800
Subject: drm/amdgpu/umsch: reinitialize write pointer in hw init
From: Lang Yu <Lang.Yu@xxxxxxx>
commit 0f1bbcc2bab25d5fb2dfb1ee3e08131437690d3d upstream.
Otherwise the old one will be used during GPU reset.
That's not expected.
Signed-off-by: Lang Yu <Lang.Yu@xxxxxxx>
Reviewed-by: Feifei Xu <Feifei.Xu@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/umsch_mm_v4_0.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/umsch_mm_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/umsch_mm_v4_0.c
@@ -225,6 +225,8 @@ static int umsch_mm_v4_0_ring_start(stru
WREG32_SOC15(VCN, 0, regVCN_UMSCH_RB_SIZE, ring->ring_size);
+ ring->wptr = 0;
+
data = RREG32_SOC15(VCN, 0, regVCN_RB_ENABLE);
data &= ~(VCN_RB_ENABLE__AUDIO_RB_EN_MASK);
WREG32_SOC15(VCN, 0, regVCN_RB_ENABLE, data);
Patches currently in stable-queue which might be from Lang.Yu@xxxxxxx are
queue-6.8/drm-amdgpu-umsch-reinitialize-write-pointer-in-hw-init.patch
