Attachment 113618 Details for Bug 87796 – fix 2/2

[patch] fix 2/2

0002-drm-radeon-disable-mclk-switching-with-120hz-monitor.patch (text/plain), 1.20 KB, created by Alex Deucher on 2015-02-18 14:24:03 UTC

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Creator: Alex Deucher

Created: 2015-02-18 14:24:03 UTC

Size: 1.20 KB

patch

obsolete

>From 2911409a313c67bc999eb5cf4ae1b8fd8af60c32 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Wed, 18 Feb 2015 00:59:45 -0500
>Subject: [PATCH 2/2] drm/radeon: disable mclk switching with 120hz+ monitors
>
>These tend to be problematic even if the vblank period is
>long enough.
>
>bugs:
>https://bugs.freedesktop.org/show_bug.cgi?id=87796
>https://bugs.freedesktop.org/show_bug.cgi?id=89198
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/radeon/radeon_pm.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
>diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
>index 9f758d3..33cf410 100644
>--- a/drivers/gpu/drm/radeon/radeon_pm.c
>+++ b/drivers/gpu/drm/radeon/radeon_pm.c
>@@ -852,6 +852,12 @@ static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev,
> 			single_display = false;
> 	}
> 
>+	/* 120hz tends to be problematic even if they are under the
>+	 * vblank limit.
>+	 */
>+	if (single_display && (r600_dpm_get_vrefresh(rdev) >= 120))
>+		single_display = false;
>+
> 	/* certain older asics have a separare 3D performance state,
> 	 * so try that first if the user selected performance
> 	 */
>-- 
>1.8.3.1
>

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Attachments on bug 87796: 111427 | 112180 | 112181 | 112228 | 113617 | 113618 | 114443 | 114452

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