On Wed, 26 Oct 2011 10:53:11 -0400, Adam Jackson <ajax at redhat.com> wrote: > On Wed, 2011-10-19 at 10:28 -0400, Adam Jackson wrote: > > > I assume the SDVO LVDS options block in the VBT would tell us what bits > > are correct to program here, but intel_bios.h documents only the layout > > of that structure, not its content. Or, we can hope that the SDVO card > > set it up correctly for us (hah). > > > > Intel people, care to shed some light here? > > Just re-raising this. I suspect we can't support SDVO LVDS correctly > without knowing more here. In particular: > > - what "panel type" means in struct bdb_sdvo_lvds_options Which of the four panels in the SDVO info is actually connected. > - what the "misc bits" mean in same LVDS_Misc_Bits_1 Bits [7:6] = Reserved Bit 5 = Dither = 0, off = 1, on Bit 4 = Panel Fitting = 0, Disabled = 1, Enabled Bit 3 = Panel EDID support - Reserved = 0, Disabled = 1, Enabled Bit 2 - 0 = Panel protection Bit 2 - Monitor Pixel Clk (0 = off, 1 = on) Bit 1 - Monitor VSync (0 = off, 1 = on) Bit 0 - Monitor HSync (0 = off, 1 = on) LVDS_Misc_Bits_2 Bit 7 = LVDS SSC Enabled = 0, Disabled = 1, Enabled Bit6 = Disable SSC in Dual Twin Display = 0, Not disabled = 1, Disabled Bits[5:4] = LVDS Channel = 02-03, Reserved = 01, Dual Channel = 00, Single Channel Bits[3:2] = Panel Connector = 01, OpenLDI = 00, SPGW Bits[1:0] = Panel color depth = 02-03, Reserved = 01, 24-bit Color depth = 00, 18-bit Color depth LVDS_Misc_Bits_3 Bits [7:4] = Reserved Bit 3 = Panel #4 = 0, Single Channel = 1, Dual Channel Bit 2 = Panel #3 = 0, Single Channel = 1, Dual Channel Bit 1 = Panel #2 = 0, Single Channel = 1, Dual Channel Bit 0 = Panel #1 = 0, Single Channel = 1, Dual Channel > - whether the BIOS AIM code can be relied on to have set > depth/type/channel correctly or if that's the driver's job That, I'm afraid, I haven't a clue about -- the BIOS does try to light up every display, but it can run out of resources just like Linux, and I don't know what happens when there's not enough pipes to go around. -- keith.packard at intel.com -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 827 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20111128/0c287c6c/attachment.pgp>
