From patchwork Wed Jan 16 15:54:46 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [086/222] drm/radeon/dce32+: use fractional fb dividers for high clocks Date: Wed, 16 Jan 2013 05:54:46 -0000 From: Herton Ronaldo Krzesinski X-Patchwork-Id: 212664 Message-Id: <1358351822-7675-87-git-send-email-herton.krzesinski@canonical.com> To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Alex Deucher 3.5.7.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit a02dc74b317d78298cb0587b9b1f6f741fd5c139 upstream. Fixes flickering with some high res montiors. Signed-off-by: Alex Deucher [ herton: on 3.5, set pll->flags instead of radeon_crtc->pll_flags ] Signed-off-by: Herton Ronaldo Krzesinski --- drivers/gpu/drm/radeon/atombios_crtc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 25b8014..80eb8d5 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -577,6 +577,8 @@ 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; + if (ASIC_IS_DCE32(rdev) && mode->clock > 165000) + pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV; } else { pll->flags |= RADEON_PLL_LEGACY;