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drm/radeon/kms: pll tweaks for rv6xx

Message ID 1302186685-30590-1-git-send-email-alexdeucher@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Alex Deucher April 7, 2011, 2:31 p.m. UTC
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
---
 drivers/gpu/drm/radeon/atombios_crtc.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
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Patch

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;