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authorAlex Deucher <alexander.deucher@amd.com>2014-01-13 16:47:05 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-13 13:48:02 -0800
commit9b0b183e7cd9e9bbef81fe5e0bcc8e1345bd186a (patch)
treec2b9461a1d3bbf7e55e3153d46a539b27f344a15
parent064fb5b674e83757c60f85c7f4d846a13168f484 (diff)
downloadlinaro-lsk-9b0b183e7cd9e9bbef81fe5e0bcc8e1345bd186a.tar.gz
drm/radeon: disable ss on DP for DCE3.x
commit d8e24525094200601236fa64a54cf73e3d682f2e upstream. Seems to cause problems with certain DP monitors. Bug: https://bugs.freedesktop.org/show_bug.cgi?id=40699 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/gpu/drm/radeon/atombios_crtc.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 5285a90e9f5..50684dc6ffd 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -938,11 +938,14 @@ static bool atombios_crtc_prepare_pll(struct drm_crtc *crtc, struct drm_display_
radeon_atombios_get_ppll_ss_info(rdev,
&radeon_crtc->ss,
ATOM_DP_SS_ID1);
- } else
+ } else {
radeon_crtc->ss_enabled =
radeon_atombios_get_ppll_ss_info(rdev,
&radeon_crtc->ss,
ATOM_DP_SS_ID1);
+ }
+ /* disable spread spectrum on DCE3 DP */
+ radeon_crtc->ss_enabled = false;
}
break;
case ATOM_ENCODER_MODE_LVDS: