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authorBen Skeggs <bskeggs@redhat.com>2010-03-18 13:38:04 +1000
committerBen Skeggs <bskeggs@redhat.com>2010-03-28 12:24:56 +1000
commit8af36117e23bc36c34d0d25484f7b9de021b51bc (patch)
tree1b09805f6c9521a3470df9209e191570802a449d
parenta383ceb7f61bb03a3f82cc0a299c78b4d79911eb (diff)
drm/nv40: add LVDS table quirk for Dell Latitude D620
Should fix: https://bugzilla.redhat.com/show_bug.cgi?id=505132 https://bugzilla.redhat.com/show_bug.cgi?id=543091 https://bugzilla.redhat.com/show_bug.cgi?id=530425 https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/ +bug/539730 Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_bios.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index dcffc7e68756..a81c738757f3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -3659,6 +3659,21 @@ int nouveau_bios_parse_lvds_table(struct drm_device *dev, int pxclk, bool *dl, b
break;
}
+ /* Dell Latitude D620 reports a too-high value for the dual-link
+ * transition freq, causing us to program the panel incorrectly.
+ *
+ * It doesn't appear the VBIOS actually uses its transition freq
+ * (90000kHz), instead it uses the "Number of LVDS channels" field
+ * out of the panel ID structure (http://www.spwg.org/).
+ *
+ * For the moment, a quirk will do :)
+ */
+ if ((dev->pdev->device == 0x01d7) &&
+ (dev->pdev->subsystem_vendor == 0x1028) &&
+ (dev->pdev->subsystem_device == 0x01c2)) {
+ bios->fp.duallink_transition_clk = 80000;
+ }
+
/* set dual_link flag for EDID case */
if (pxclk && (chip_version < 0x25 || chip_version > 0x28))
bios->fp.dual_link = (pxclk >= bios->fp.duallink_transition_clk);