drm/nv50: obey dcb->duallink_possible

It was once assumed that all G8x had dual-link TMDS everywhere, this isn't
actually the case - especially considering passive DP->DVI converters and
some HDMI connectors only support single-link.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 7e663a7..bfa6562 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -593,8 +593,7 @@ nouveau_connector_mode_valid(struct drm_connector *connector,
                break;
        case OUTPUT_TMDS:
                if ((dev_priv->card_type >= NV_50 && !nouveau_duallink) ||
-                   (dev_priv->card_type < NV_50 &&
-                    !nv_encoder->dcb->duallink_possible))
+                   !nv_encoder->dcb->duallink_possible)
                        max_clock = 165000;
                else
                        max_clock = 330000;