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Subject[ 09/69] drm/nouveau: default to 8bpc for non-LVDS panels if EDID isnt useful
3.2-stable review patch.  If anyone has any objections, please let me know.

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

From: Ben Skeggs <bskeggs@redhat.com>

commit c8435362f2211086b34ce871fa9c3fcc7ca79ff9 upstream.

A few reports of bad behaviour since the autodetection defaulted to 6bpc,
lets fix this.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/gpu/drm/nouveau/nouveau_connector.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 8f510fd..fa86035 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -654,10 +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 6bpc */
- connector->display_info.bpc = 6;
- if (nv_encoder->dcb->type != OUTPUT_LVDS)
+ /* if not, 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;
+ }
+
+ connector->display_info.bpc = 6;

/* LVDS: panel straps */
if (bios->fp_no_ddc) {



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