gma: Configure panel fitter / pipe scaler

If the framebuffer size is smaller than the display mode's resolution,
enable the panel fitter or pipe scaler (on Skylake+).

Change-Id: I0a648a7e7bf495a80636a589a74b698ecba7e7d5
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17263
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: Nico Huber <nico.h@gmx.de>
3 files changed
tree: 1d173567e74bceb55a7904b3cccc0e1cbb535f57
  1. common/
  2. configs/
  3. .gitignore
  4. COPYING
  5. Makefile
  6. Makefile.inc
  7. TODO