diff options
author | Ben Skeggs <bskeggs@redhat.com> | 2010-03-18 13:38:04 +1000 |
---|---|---|
committer | Ben Skeggs <bskeggs@redhat.com> | 2010-03-28 12:24:56 +1000 |
commit | 8af36117e23bc36c34d0d25484f7b9de021b51bc (patch) | |
tree | 1b09805f6c9521a3470df9209e191570802a449d | |
parent | a383ceb7f61bb03a3f82cc0a299c78b4d79911eb (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.c | 15 |
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); |