Commit 2eb92c80 authored by Ben Skeggs's avatar Ben Skeggs
parent f3bbb9cc
......@@ -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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