This fixes a rather irritating limitation of active dp->foo converters. Many such (including all DP->VGA chips I can find on the market) come equipped with only 2 DP lanes, which clips your dotclock to 144MHz at 8bpc. Of the standard DMT modes, that means you lose 1600x1200@60 and above. Since these adaptors are marketed as supporting 1920x1200, we might as well make that work, otherwise it's the driver that comes out looking bad.
Granted you'll end up with 6bpc, which is hideous, but you're using VGA so you don't get to complain about image quality. Tested with a DP->VGA converter on an HP LP2480zx. - ajax _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
