drm/nouveau/disp: fix dithering not being enabled on some eDP macbooks

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

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index fa860358add1..7b11edb077d0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -654,7 +654,13 @@ nouveau_connector_detect_depth(struct drm_connector *connector)
         if (nv_connector->edid && connector->display_info.bpc)
                 return;
 
-        /* if not, we're out of options unless we're LVDS, default to 8bpc */
+        /* EDID 1.4 is *supposed* to be supported on eDP, but, Apple... */
+        if (nv_connector->type == DCB_CONNECTOR_eDP) {
+                connector->display_info.bpc = 6;
+                return;
+        }
+
+        /* we're out of options unless we're LVDS, default to 8bpc */
         if (nv_encoder->dcb->type != OUTPUT_LVDS) {
                 connector->display_info.bpc = 8;
                 return;