commit | b9a7d779b3cb48bb784d0856b6bb5f3fc6b4c1f7 | [log] [tgz] |
---|---|---|
author | Vinod Polimera <vpolimer@codeaurora.org> | Mon Sep 21 08:55:16 2020 +0530 |
committer | Julius Werner <jwerner@chromium.org> | Fri Oct 09 22:03:35 2020 +0000 |
tree | 60e660db73d247be698ad68d94113e2a2ef2e19e | |
parent | 3c667a2e7d97bd0acd15a28e762bb793b5fa5d62 [diff] |
sc7180: Remove the delay to force hpd detection and always disable HPD HPD on this bridge chip is a bit useless. This is an eDP bridge so the HPD is an internal signal that's only there to signal that the panel is done powering up. But the bridge chip debounces this signal by between 100 ms and 400 ms (depending on process, voltage, and temperate). One particular panel asserted HPD 84 ms after it was powered on meaning that we saw HPD 284 ms after power on. Assume that the panel driver will have the hardcoded delay in its prepare and always disable HPD. Change-Id: Iea7dd75b57fa55ec182c0bee09b0f35208357892 Signed-off-by: Vinod Polimera <vpolimer@codeaurora.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45706 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@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.