This is libdrm, a userspace library for accessing the DRM, direct rendering manager, on Linux, BSD and other operating systems that support the ioctl interface. The library provides wrapper functions

unpack and pack new ramdisk

test-picture

io命令，用于访问和配置芯片寄存器配置 Examples: io 0x1000 Reads one byte from 0x1000 io 0x1000 0x12 Writes 0x12 to location 0

make rk1109_a7_defconfig 生成.config 配置 make menuconfig 配置组件 make savedefconfig 将最新配置保存到configs/rk1109_a7_defconfig make -j32 开始编译