commit: 9bb09fa1b5b07459279301ac6220d575f307597b
From: Alex Deucher <[email protected]>
Date: Thu, 7 Apr 2011 10:31:25 -0400
Subject: [PATCH] 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 <[email protected]>
Cc: [email protected]
Signed-off-by: Dave Airlie <[email protected]>
---
 drivers/gpu/drm/radeon/atombios_crtc.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c 
b/drivers/gpu/drm/radeon/atombios_crtc.c
index b41ec59..9d516a8 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;
 

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