libgfxinit: Allow to configure screen rotation

This allows to configure a default screen rotation in 90-degree
steps. The framebuffer contents will then be displayed rotated,
by the same amount in the other direction; i.e. if you turn the
screen to the left, the picture has to be rotated to the right
to accommodate.

This is only supported by libgfxinit from Skylake / Apollo Lake
on (earlier GPUs didn't support the 90-degree steps anyway) and
it only works with the linear-framebuffer option.

Change-Id: Iac75cefbd34f28c55ec20ee152fe67351cc48653
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38922
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

0 files changed, 0 insertions, 0 deletions