This is a note to let you know that I've just added the patch titled
drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
to the 4.9-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-powerplay-smu7-disable-mclk-switching-for-high-refresh-rates.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Thu, 11 May 2017 13:57:41 -0400
Subject: drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
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From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 upstream.
Even if the vblank period would allow it, it still seems to
be problematic on some cards.
bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -2633,7 +2633,8 @@ static int smu7_apply_state_adjust_rules
disable_mclk_switching = ((1 < info.display_count) ||
disable_mclk_switching_for_frame_lock ||
- smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us));
+ smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us) ||
+ (mode_info.refresh_rate > 120));
sclk = smu7_ps->performance_levels[0].engine_clock;
mclk = smu7_ps->performance_levels[0].memory_clock;
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-4.9/drm-amd-powerplay-smu7-add-vblank-check-for-mclk-switching-v2.patch
queue-4.9/drm-radeon-fix-vram_size-visible-values-in-drm_radeon_gem_info-ioctl.patch
queue-4.9/drm-radeon-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch
queue-4.9/drm-radeon-unbreak-hpd-handling-for-r600.patch
queue-4.9/drm-amd-powerplay-smu7-disable-mclk-switching-for-high-refresh-rates.patch