From: Alex Deucher <alexdeucher@gmail.com>
Date: Thu, 7 Apr 2011 14:31:25 +0000 (-0400)
Subject: drm/radeon/kms: pll tweaks for rv6xx
X-Git-Tag: v5.15~25668^2~10
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=9bb09fa1b5b07459279301ac6220d575f307597b;p=mirror_ubuntu-kernels.git

drm/radeon/kms: pll tweaks for rv6xx

Prefer minm over maxp.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=35994

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index b41ec59c7100..9d516a8c4dfa 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -531,6 +531,12 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
 			pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
 		else
 			pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;
+
+		if ((rdev->family == CHIP_R600) ||
+		    (rdev->family == CHIP_RV610) ||
+		    (rdev->family == CHIP_RV630) ||
+		    (rdev->family == CHIP_RV670))
+			pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP;
 	} else {
 		pll->flags |= RADEON_PLL_LEGACY;