tree 31d30be1c8b8ec1d1266a24be1a9ea89f978326f
parent 27dfc39efe95025be2271e2e00e9df93b7907840
author Julius Werner <jwerner@chromium.org> 1458001795 -0700
committer chrome-bot <chrome-bot@chromium.org> 1460078254 -0700

UPSTREAM: edid: Add helper function to calculate bits-per-pixel dependent values

Coreboot and most payloads support three basic pixel widths for the
framebuffer. It assumes 32 by default, but several chipsets need to
override that value with whatever else they're supporting. Our struct
edid contains multiple convenience values that are directly derived from
this (and other properties), so changing the bits per pixel always
requires recalculating all those dependents in the chipset code. This
patch provides a small convenience wrapper that can be used to
consistently update the whole struct edid with a new pixel width
instead, so we no longer need to duplicate those calculations
everywhere.

CQ-DEPEND=CL:337692
BRANCH=None
BUG=None
TEST=Booted Oak in all three pixel widths (which it conveniently all
supports), confirmed that images looked good.

Change-Id: I5376dd4e28cf107ac2fba1dc418f5e1c5a2e2de6
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/14158
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
(cherry picked from commit 6911219ccc445f833264cf5a5a4b9439b9670b40)
Reviewed-on: https://chromium-review.googlesource.com/337175
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>