Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=32556
Signed-off-by: Alex Deucher <alexdeuc...@gmail.com>
---
drivers/gpu/drm/radeon/atombios_crtc.c | 16 ++++++++++++++--
1 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c
b/drivers/gpu/drm/radeon/atombios_crtc.c
index b0ab185..0ed2469 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -524,8 +524,8 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
if ((rdev->family == CHIP_RS600) ||
(rdev->family == CHIP_RS690) ||
(rdev->family == CHIP_RS740))
- pll->flags |= (/*RADEON_PLL_USE_FRAC_FB_DIV |*/
- RADEON_PLL_PREFER_CLOSEST_LOWER);
+ pll->flags |= (RADEON_PLL_USE_FRAC_FB_DIV |
+ RADEON_PLL_PREFER_CLOSEST_HIGHER);
if (ASIC_IS_DCE32(rdev) && mode->clock > 200000) /*
range limits??? */
pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
@@ -578,6 +578,18 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
if (encoder->encoder_type ==
DRM_MODE_ENCODER_LVDS)
pll->flags |= RADEON_PLL_USE_REF_DIV;
}
+
+ if ((rdev->family == CHIP_RS600) ||
+ (rdev->family == CHIP_RS690) ||
+ (rdev->family == CHIP_RS740)) {
+ /* TMDS on these chips seems to prefer a
slightly higher clock and
+ * even post dividers
+ */
+ if (radeon_encoder->devices &
(ATOM_DEVICE_DFP_SUPPORT)) {
+ adjusted_clock += 50;
+ pll->flags |=
RADEON_PLL_NO_ODD_POST_DIV;
+ }
+ }
break;
}
}
--
1.7.1.1
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