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lineage_android_kernel_samsung_jf
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drm/radeon: use frac fb div on RS780/RS880 

commit 411678288d61ba17afe1f8afed92200be6bbc65d upstream.

Monitors seem to prefer it.  Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=37696

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[bwh: Backported to 3.2:
 - Adjust context
 - Add to pll->flags, not radeon_crtc->pll_flags]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2013-04-01 16:06:25 -04:00 committed by Greg Kroah-Hartman
parent ace6581eb5
commit f909046a7b
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -573,6 +573,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
/* use frac fb div on APUs */
if (ASIC_IS_DCE41(rdev) || ASIC_IS_DCE61(rdev))
pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV;
/* use frac fb div on RS780/RS880 */
if ((rdev->family == CHIP_RS780) || (rdev->family == CHIP_RS880))
pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV;
if (ASIC_IS_DCE32(rdev) && mode->clock > 165000)
pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV;
} else {