commit | d0ded1652927016677e366e2cc8a112a60db251a | [log] [tgz] |
---|---|---|
author | Paul Ma <magf@bitland.corp-partner.google.com> | Fri May 08 14:28:25 2020 +0800 |
committer | Patrick Georgi <pgeorgi@google.com> | Mon May 18 07:10:31 2020 +0000 |
tree | 8ec7afb4d63cce3838a11dc537cd0174ab0eeade | |
parent | e8d1bef8cbd78c00065381848030655d34d0ecd3 [diff] |
soc/mediatek: dsi: adjust hfp_byte and hbp_byte if too small If panel has too small hfp or hbp, hfp_byte or hbp_byte may become very small value or negative value. When very small value or negative value is used, the panel will be scrolling or distorted. This patch adjusts their values so that they are greater than the minimum value and keep total of them unchanged. DSI transfer HBP or HFP, There are some extra packet. ex. packet header(4byte) and eof(2byte) and (next)hs packet header(4 byte). the hfp_byte = HFP * BPP - packet header(4byte) and eof(2byte) and (next)hs packet header(4 byte). So the min hfp_byte is 2 when HFP = 4. This is equivalent to the Linux kernel DSI change in: https://chromium-review.googlesource.com/c/chromiumos/third_party/ kernel/+/2186872 BUG=b:144824303 BRANCH=kukui TEST=boot damu board with panel CMN N120ACA-EA1 (12" panel and its hbp only 6), the panel can display without scrolling or distortions. Signed-off-by: Paul Ma <magf@bitland.corp-partner.google.com> Change-Id: I608c01d41ae93c8d5094647bbf3e0ae4a23d814c Reviewed-on: https://review.coreboot.org/c/coreboot/+/41163 Reviewed-by: Hung-Te Lin <hungte@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.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:
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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.