Gitweb: http://git.kernel.org/linus/2eb92c80074ecfbc691741720382007417f64523
Commit: 2eb92c80074ecfbc691741720382007417f64523
Parent: f3bbb9ccbf2a0362363ce6d7e4e57dbf34a5cef1
Author: Ben Skeggs <bskeggs@redhat.com>
AuthorDate: Thu Mar 18 13:38:04 2010 +1000
Committer: Ben Skeggs <bskeggs@redhat.com>
CommitDate: Fri Apr 9 10:12:15 2010 +1000
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>
---
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 075eb89..ad6c2d4 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);
--
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