From: Francisco Jerez Date: Sat, 25 Dec 2010 14:43:30 +0000 (+0100) Subject: drm/nouveau: Workaround incorrect DCB entry on a GeForce3 Ti 200. X-Git-Tag: firefly_0821_release~7613^2~1688^2~40^2~56 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=670820c0e6a9c82dd2f96663dc4c6aec2a18c32b;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Francisco Jerez Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index d3046559bf05..c85a71596688 100644 --- 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; }