On Tue, 26 August 2014 Andreas Noever <andreas.noever@xxxxxxxxx> wrote: > On Sun, Aug 24, 2014 at 11:09 PM, Bruno Prémont wrote: > > With commit 20cde694027e boot video device detection was moved from > > efifb to x86 and ia64 pci/fixup.c. > > > > For dual-GPU Apple computers above change represents a regression as > > code in efifb did forcefully override vga_default_device while the > > merge did not (vgaarb happens prior to PCI fixup). > > > > To improve on initial device selection by vgaarb (it cannot know if > > PCI device not behind bridges see/decode legacy VGA I/O or not), move > > the screen_info based check from pci_video_fixup to vgaarb's init > > function and use it to refine/override decision taken while adding > > the individual PCI VGA devices. > > This way PCI fixup has no reason to adjust vga_default_device > > anymore but can depend on its value for flagging shadowed VBIOS. > > > > This has the nice benefit of removing duplicated code but does > > introduce a #if defined() block in vgaarb. > > Not all architectures have screen_info and would cause compile to > > fail without it. > > > > Reported-By: Andreas Noever <andreas.noever@xxxxxxxxx> > > CC: Matthew Garrett <matthew.garrett@xxxxxxxxxx> > > CC: stable@xxxxxxxxxxxxxxx # v3.5+ > > Signed-off-by: Bruno Prémont <bonbons@xxxxxxxxxxxxxxxxx> > > --- > > Andreas, does this work properly for you, including the improvement > > on i915 complaint about VBIOS going from KERN_ERR to KERN_INFO? > Yep, thanks! > > > > > Other arches using PCI and vgaarb that have screen_info may want > > to be added to the #if defined() block or even introduce a new > > CONFIG_HAVE_SCREEN_INFO or similar... Bjorn, can you queue these two patches, probably going through -next for a week and passing them to Linus for -rc4, adding Andreas's Tested-by to Patch 1/2 v2? Thanks, Bruno -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
