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
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
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
