Patrick Rudolph uploaded patch set #2 to this change.

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drivers/aspeed/common: Add support for high resolution framebuffer

* Implement reading EDID over software I2C.
* Copy the linux kernel code and add a bunch of wrapper structs to make it
  compile.
* Convert the EDID to a drm_display_mode, which is understood by the
  driver.

Tested on Supermicro X11SSH-TF using FullHD VGA monitor.
Initializes the graphics in about 1 second, which is twice as fast as the
VGA Option ROM.

The framebuffer is advertised and woring in tianocore.

Change-Id: I7803566b64158405efc04a39f80a0ec98b44e646
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
---
M src/drivers/aspeed/ast2050/Kconfig
M src/drivers/aspeed/ast2050/ast2050.c
M src/drivers/aspeed/common/Kconfig
M src/drivers/aspeed/common/Makefile.inc
M src/drivers/aspeed/common/ast_drv.h
A src/drivers/aspeed/common/ast_i2c.c
A src/drivers/aspeed/common/ast_mode.c
M src/drivers/aspeed/common/ast_tables.h
8 files changed, 1,160 insertions(+), 85 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/26/35726/2

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