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Commit d8e24525 authored by Alex Deucher's avatar Alex Deucher
Browse files

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: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 6dfa09d7

drivers/gpu/drm/radeon/atombios_crtc.c

+4 −1
Original line number Diff line number Diff line
@@ -938,12 +938,15 @@ 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:

			if (ASIC_IS_DCE4(rdev))