[PATCH v2] i915: Add option to bypass vbt table.
daniel at ffwll.ch
Thu Mar 1 14:23:43 PST 2012
On Thu, Mar 01, 2012 at 10:41:32PM +0100, Paul Menzel wrote:
> Am Donnerstag, den 01.03.2012, 20:38 +0100 schrieb Daniel Vetter:
> > On Thu, Mar 01, 2012 at 06:44:35AM +0100, Mathias.Froehlich at gmx.net wrote:
> > > From: Mathias Fröhlich <Mathias.Froehlich at web.de>
> > >
> > > Add an option to skip reading the mode entries from
> > > the vbt bios tables.
> > > This change enables the use of displays where the vbt table just
> > > contains inappropriate values, but either the vesa defaults or
> > > the video=... modes do something sensible with the attached display.
> > >
> > > Reviewed-by: Paul Menzel <paulepanter at users.sourceforge.net>
> > > Signed-off-by: Mathias Froehlich <Mathias.Froehlich at web.de>
> > Can you elaborate a bit on why this is required? Is this for a machine
> > (like the chrome machines) that just lack a vbios? Or do we fail to parse
> > the vbt in some way?
> Pasted from Mathias’ message with the first patch iteration.
Ah, that explains things. I've added this to the commit message and queued
it for -next, thanks.
> Am Mittwoch, den 29.02.2012, 20:34 +0100 schrieb Mathias Fröhlich:
> > Attached is a small change to i915 that fixes a customer case that I had in my
> > day job.
> > The problem happens with an embedded board that contains vbt bios tables that
> > do not match the attached display.
> > Using this change and the appropriate kernel boot command line they are able to
> > use an otherwise completely unusable secondary display on that embedded board.
> > Please review.
Mail: daniel at ffwll.ch
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