| From: Alex Deucher <alexander.deucher@amd.com> |
| Date: Mon, 1 Apr 2013 16:06:25 -0400 |
| Subject: 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> |
| --- |
| drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- 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 dr |
| /* 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 { |
