| commit | 1106bcce0df6569a93a36a02326e1eb34b181068 | [log] [tgz] |
|---|---|---|
| author | Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com> | Fri Dec 17 15:57:52 2021 +0900 |
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | Mon Jan 03 21:15:07 2022 +0000 |
| tree | 388be0758486fe96d43a1b80abfeff2e04f7f49c | |
| parent | 2a4858afed4c8618182a78a6de965d1cad6e8630 [diff] |
mb/google/dedede/var/bugzzy: Initialize display signals on user mode
Bugzzy uses panel-built-in touch screen, it needs to set panel power
and reset signal to high for touch screen to work.
On user mode, coreboot doesn't initialize graphics since there is no
screen display before OS. So we would add a WA to initialize required
signals on user mode. It takes under 30 ms delay on booting time.
BUG=b:205496327
BRANCH=dedede
TEST=Verified touch screen worked with test coreboot
and test touch screen 028D firmware
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Change-Id: Iaa4d16deb932f43ae1ab33ff5b4e74120ab670db
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60190
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload.
With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI. This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required.
coreboot was formerly known as LinuxBIOS.
After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot.
See https://www.coreboot.org/Payloads for a list of supported payloads.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case).Optional:
make menuconfig and make nconfig)Please consult https://www.coreboot.org/Build_HOWTO for details.
If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.
Please see https://www.coreboot.org/QEMU for details.
Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website:
You can contact us directly on the coreboot mailing list:
https://www.coreboot.org/Mailinglist
The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details.
coreboot is licensed under the terms of the GNU General Public License (GPL). Some files are licensed under the "GPL (version 2, or any later version)", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other (GPL-compatible) licenses may apply. Please check the individual source files for details.
This makes the resulting coreboot images licensed under the GPL, version 2.