Attachment 92007 Details for Bug 40699 – disable ss for DP on DCE3

[patch] disable ss for DP on DCE3

0001-drm-radeon-disable-ss-on-DP-for-DCE3.x.patch (text/plain), 1.22 KB, created by Alex Deucher on 2014-01-13 23:09:17 UTC

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Creator: Alex Deucher

Created: 2014-01-13 23:09:17 UTC

Size: 1.22 KB

patch

obsolete

>From d48a6a5fcef4c81ba607be387f0c1a2ea9df9664 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Mon, 13 Jan 2014 16:47:05 -0500
>Subject: [PATCH] drm/radeon: disable ss on DP for DCE3.x
>
>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>
>Cc: stable@vger.kernel.org
>---
> 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 80a2012..5946917 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:
>-- 
>1.8.3.1
>

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