tree 1ccd9878f6cbe93a2fe35a4171ac92018fecbaab
parent ce1d643143bc125aec62920d8f069917b0370749
author Julius Werner <jwerner@chromium.org> 1459972240 -0700
committer chrome-bot <chrome-bot@chromium.org> 1460078255 -0700

UPSTREAM: edid: Make framebuffer row alignment configurable

Our EDID code had always been aligning the framebuffer's
bytes_per_line (and x_resolution dependent on that) to 64. It turns out
that this is a controller-dependent parameter that seems to only really
be necessary for Intel chipsets, and commit 6911219cc (edid: Add helper
function to calculate bits-per-pixel dependent values) probably actually
broke this for some other controllers by applying the alignment too
widely.

This patch makes it explicitly configurable and depends the default on
ARCH_X86 (which seems to be the simplest and least intrusive way to make
it fit most cases for now... boards where this doesn't apply can still
override it manually by calling edid_set_framebuffer_bits_per_pixel()
again).

BRANCH=None
BUG=None
TEST=None

Change-Id: I1c565a72826fc5ddfbb1ae4a5db5e9063b761455
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/14267
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/337692
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>