Attachment 131322 Details for Bug 96868 – possible fix 4/4

[patch] possible fix 4/4

0004-drm-amd-powerplay-smu7-disable-mclk-switching-for-hi.patch (text/plain), 1.27 KB, created by Alex Deucher on 2017-05-11 18:00:43 UTC

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Creator: Alex Deucher

Created: 2017-05-11 18:00:43 UTC

Size: 1.27 KB

patch

obsolete

>From f68600f1462133344a62ca716c632b25af3469f9 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Thu, 11 May 2017 13:57:41 -0400
>Subject: [PATCH 4/4] drm/amd/powerplay/smu7: disable mclk switching for high
> refresh rates
>
>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
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>---
> drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
>index d745065..98a1463 100644
>--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
>+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
>@@ -2793,7 +2793,8 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr *hwmgr,
> 
> 	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;
>-- 
>2.5.5
>

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Attachments on bug 96868: 125006 | 125007 | 125011 | 131319 | 131320 | 131321 | 131322 | 131450 | 131451 | 131452 | 131453 | 142660

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