drm/nouveau: Workaround incorrect DCB entry on a GeForce3 Ti 200.

Fixes the DVI-D output on that board (fdo bug 32645).

Reported-by: Bryan Quigley <BryanQuigley@Ubuntu.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index d304655..c85a715 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -6310,6 +6310,9 @@ void merge_like_dcb_entries(struct drm_device *dev, struct dcb_table *dcb)
 static bool
 apply_dcb_encoder_quirks(struct drm_device *dev, int idx, u32 *conn, u32 *conf)
 {
+       struct drm_nouveau_private *dev_priv = dev->dev_private;
+       struct dcb_table *dcb = &dev_priv->vbios.dcb;
+
        /* Dell Precision M6300
         *   DCB entry 2: 02025312 00000010
         *   DCB entry 3: 02026312 00000020
@@ -6327,6 +6330,18 @@ apply_dcb_encoder_quirks(struct drm_device *dev, int idx, u32 *conn, u32 *conf)
                        return false;
        }
 
+       /* GeForce3 Ti 200
+        *
+        * DCB reports an LVDS output that should be TMDS:
+        *   DCB entry 1: f2005014 ffffffff
+        */
+       if (nv_match_device(dev, 0x0201, 0x1462, 0x8851)) {
+               if (*conn == 0xf2005014 && *conf == 0xffffffff) {
+                       fabricate_dcb_output(dcb, OUTPUT_TMDS, 1, 1, 1);
+                       return false;
+               }
+       }
+
        return true;
 }