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| author | Alex Deucher <alexander.deucher@amd.com> | 2013-04-01 16:06:25 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-05-13 15:02:12 +0100 |
| commit | 9ba240246fdb384fa1bd80a5b7528101e47d9bb8 (patch) | |
| tree | 79a7ac2a2b990ee0794b070bf2b601c9bdc29d3f | |
| parent | c54fd985b53459023ef8205fdc09993b7badeedf (diff) | |
| download | lwn-9ba240246fdb384fa1bd80a5b7528101e47d9bb8.tar.gz lwn-9ba240246fdb384fa1bd80a5b7528101e47d9bb8.zip | |
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>
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_crtc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index a25d08af62d8..038570aadf7f 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -544,6 +544,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, /* use frac fb div on APUs */ if (ASIC_IS_DCE41(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 { |