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| author | Ben Skeggs <bskeggs@redhat.com> | 2010-03-18 13:38:04 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-04-09 10:12:15 +1000 |
| commit | 2eb92c80074ecfbc691741720382007417f64523 (patch) | |
| tree | 98c4dd5fe49dfb2049a2e186a52c57451af6f8a2 | |
| parent | f3bbb9ccbf2a0362363ce6d7e4e57dbf34a5cef1 (diff) | |
| download | linux-3.10-2eb92c80074ecfbc691741720382007417f64523.tar.gz linux-3.10-2eb92c80074ecfbc691741720382007417f64523.tar.bz2 linux-3.10-2eb92c80074ecfbc691741720382007417f64523.zip | |
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 075eb894648..ad6c2d4520a 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); |