gma pch lvds: Fully initialize port register

This very stale code only ever worked because it left old settings in-
tact (i.e. settings done by the Video BIOS). So initialize everything
needed for known LVDS displays to work.

TEST=none so far

Change-Id: If5dcc186ca1d4a07deb2ca78f018d613f5e029ad
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/17022
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2 files changed
tree: 6e95672ac2d5f858f88ef811df496c53403ac5d0
  1. common/
  2. configs/
  3. .gitignore
  4. COPYING
  5. Makefile
  6. Makefile.inc
  7. TODO