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Subject[PATCH 051/115] drm/radeon: use frac fb div on RS780/RS880
Date
3.5.7.13 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

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>
[ luis: backported to 3.5:
- adjust context
- use pll->flags instead of radeon_crtc->pll_flags ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 08b71a3..c4e646f 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -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 {
--
1.8.1.2


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