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add uConsole cm4 patch for kernel

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cuu 2023-06-30 13:17:45 +08:00
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Code/patch/cm4/20230630/0001-patch-cm4.patch Normal file
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# Patch for uConsole CM4
based on `https://github.com/raspberrypi/linux.git`
commit hash: 3a33f11c48572b9dd0fecac164b3990fc9234da8
## Prepares
ubuntu 22.04 with aarch64-linux-gnu-
```
sudo apt install -y build-essential gcc-aarch64-linux-gnu
```
## Example process of compiling
```
cd
git clone https://github.com/raspberrypi/linux.git
cd linux
wget
git reset --hard 3a33f11c48572b9dd0fecac164b3990fc9234da8
git apply 0001-patch-cm4.patch
KERNEL=kernel8 make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig
KERNEL=kernel8 make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j2
rm -rf ./modules/*
INSTALL_MOD_PATH=./modules make modules_install
rm modules/lib/modules/*/build
rm modules/lib/modules/*/source
```
## config.txt
In order to use compiled kernel8.img with CM4 in uConsole ,we have to setup a config.txt
```
disable_overscan=1
dtparam=audio=on
[pi4]
max_framebuffers=2
[all]
ignore_lcd=1
dtoverlay=dwc2,dr_mode=host
dtoverlay=vc4-kms-v3d-pi4,cma-384
dtoverlay=devterm-pmu
dtoverlay=devterm-panel-uc
dtoverlay=devterm-misc
dtoverlay=audremap,pins_12_13
dtparam=spi=on
gpio=10=ip,np
```