[PATCH] efifb: BGRT: Add check for new BGRT status field rotation bits

[Ard Biesheuvel]

On Mon, 10 Jun 2019 at 17:12, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote:
>
> On Wed, 29 May 2019 at 17:46, Hans de Goede <hdegoede at redhat.com> wrote:
> >
> > Starting with ACPI 6.2 bits 1 and 2 of the BGRT status field are no longer
> > reserved. These bits are now used to indicate if the image needs to be
> > rotated before being displayed.
> >
> > The efifb code does not support rotating the image before copying it to
> > the screen.
> >
> > This commit adds a check for these new bits and if they are set leaves the
> > fb contents as is instead of trying to use the un-rotated BGRT image.
> >
> > Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>
> Acked-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
>

BTW should we make sure that this patch and the efi-bgrt patch get
merged at the same time? I guess the net result is just that we get
rid of some error in the log, but a rotated BMP will be ignored
otherwise. Or is it relevant for userland in some other way?