From 03ee9dc36ecb95b78f91ad111d9340ec37efe969 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 13 Jan 2014 16:47:05 -0500 Subject: [PATCH] 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 [bwh: Backported to 3.2: s/radeon_crtc->//] Signed-off-by: Ben Hutchings --- drivers/gpu/drm/radeon/atombios_crtc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 038570aadf7f..cd98c0618250 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -956,10 +956,13 @@ static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode ss_enabled = radeon_atombios_get_ppll_ss_info(rdev, &ss, ATOM_DP_SS_ID1); - } else + } else { ss_enabled = radeon_atombios_get_ppll_ss_info(rdev, &ss, ATOM_DP_SS_ID1); + } + /* disable spread spectrum on DCE3 DP */ + ss_enabled = false; } break; case ATOM_ENCODER_MODE_LVDS: -- 2.39.5