This is a note to let you know that I've just added the patch titled
drm/amd/display: Fix prefetch calculations for dcn32
to the 6.0-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-amd-display-fix-prefetch-calculations-for-dcn32.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 246e667079e8d0fc85f842bceca8c5a3c5da5905 Mon Sep 17 00:00:00 2001
From: Dillon Varone <Dillon.Varone@xxxxxxx>
Date: Thu, 3 Nov 2022 18:33:38 -0400
Subject: drm/amd/display: Fix prefetch calculations for dcn32
From: Dillon Varone <Dillon.Varone@xxxxxxx>
commit 246e667079e8d0fc85f842bceca8c5a3c5da5905 upstream.
[Description]
Prefetch calculation loop was not exiting until utilizing all of vstartup if it
failed once. Locals need to be reset on each iteration of the loop.
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Signed-off-by: Dillon Varone <Dillon.Varone@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.0.x
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
@@ -718,6 +718,8 @@ static void DISPCLKDPPCLKDCFCLKDeepSleep
do {
MaxTotalRDBandwidth = 0;
+ DestinationLineTimesForPrefetchLessThan2 = false;
+ VRatioPrefetchMoreThanMax = false;
#ifdef __DML_VBA_DEBUG__
dml_print("DML::%s: Start loop: VStartup = %d\n", __func__, mode_lib->vba.VStartupLines);
#endif
Patches currently in stable-queue which might be from Dillon.Varone@xxxxxxx are
queue-6.0/drm-amd-display-fix-prefetch-calculations-for-dcn32.patch
