PEPPY/HASWELL: move more support functions from mainboard to the intel i915 driver

Move (and rename to make it clearer) the function that computes display
parameters from the dpcd and edid.

TEST=Build and boot on peppy. Doesn't break falco other builds.

Change-Id: Idfbb56fd312b23c742c52abca1a34ae117a8fece
Signed-off-by: Ronald G. Minnich <>
Reviewed-by: Furquan Shaikh <>
Reviewed-by: Ronald Minnich <>
Tested-by: Ronald Minnich <>
Commit-Queue: Ronald Minnich <>
6 files changed