[ 01/42] drm/nouveau/disp: fix dithering not being enabled on some eDP macbooks

[Greg KH]

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Skeggs <bskeggs@xxxxxxxxxx>

commit a6a17859f1bdf607650ee055101f54c5f207762b upstream.

Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/nouveau/nouveau_connector.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- 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 dr
 	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;


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