Attachment 60315 Details for Bug 48880 – possible fix

[patch] possible fix

0001-drm-radeon-kms-use-frac-fb-div-on-APUs.patch (text/plain), 1.05 KB, created by Alex Deucher on 2012-04-19 07:47:09 UTC

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Creator: Alex Deucher

Created: 2012-04-19 07:47:09 UTC

Size: 1.05 KB

patch

obsolete

>From aa3dcb884155e65d984e478a929dc73789b9e966 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Thu, 19 Apr 2012 10:42:55 -0400
>Subject: [PATCH] drm/radeon/kms: use frac fb div on APUs
>
>Seems to be more stable on certain monitors.
>
>Fixes:
>https://bugs.freedesktop.org/show_bug.cgi?id=48880
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/radeon/atombios_crtc.c |    3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
>index b5ff1f7..c5c31e0 100644
>--- a/drivers/gpu/drm/radeon/atombios_crtc.c
>+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
>@@ -575,6 +575,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
> 
> 		if (rdev->family < CHIP_RV770)
> 			pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP;
>+		/* use frac fb div on APUs */
>+		if (ASIC_IS_DCE41(rdev) || ASIC_IS_DCE61(rdev))
>+			pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV;
> 	} else {
> 		pll->flags |= RADEON_PLL_LEGACY;
> 
>-- 
>1.7.7.5
>

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