diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index df2b6f2..f2fccb0 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -553,6 +553,15 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
 				if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS)
 					pll->flags |= RADEON_PLL_USE_REF_DIV;
 			}
+
+			if ((rdev->family == CHIP_RS600) ||
+			    (rdev->family == CHIP_RS690) ||
+			    (rdev->family == CHIP_RS740)) {
+				/* TMDS on these chips seems to prefer a slightly higher clock? */
+				if (radeon_encoder->devices & (ATOM_DEVICE_DFP_SUPPORT)) {
+					adjusted_clock += 50;
+				}
+			}
 			break;
 		}
 	}