无法加载fbtft模块——OrangePi Zero Buildroot配置问题排查

已执行的操作 #

• 通过make linux-menuconfig在Device Drivers > Graphics Support > Frame Buffer Devices >路径下开启以下编译选项：

  <M> Support for frame buffer devices  --->
  <M> Support for small TFT LCD display modules  --->
  

• 在Support for small TFT LCD display modules子菜单中启用了<m> FB driver for the ILI9340 LCD Controller
• Buildroot的.config配置文件包含以下相关项：

  ...
  # BR2_LINUX_KERNEL_EXT_EV3DEV_LINUX_DRIVERS is not set
  BR2_LINUX_KERNEL_EXT_FBTFT=y
  # BR2_LINUX_KERNEL_EXT_AUFS is not set
  ...
  ...
  # BR2_PACKAGE_FAN_CTRL is not set
  BR2_PACKAGE_FBTFT=y
  # BR2_PACKAGE_FCONFIG is not set
  ...
  

• 构建过程中能看到内核补丁相关的操作脚本执行：

  if [ -e /some_path/dev/buildroot/buildroot-2023.02.1/output/build/linux-5.15.16/drivers/video/fbdev ]; then dest=drivers/video/fbdev ; else dest=drivers/video ; fi ; mkdir -p /some_path/dev/buildroot/buildroot-2023.02.1/output/build/linux-5.15.16/${dest}/fbtft; cp -dpfr /some_path/dev/buildroot/buildroot-2023.02.1/output/build/fbtft-274035404701245e7491c0c6471c5b72ade4d491/* /some_path/dev/buildroot/buildroot-2023.02.1/output/build/linux-5.15.16/${dest}/fbtft/ ; echo "source \"${dest}/fbtft/Kconfig\"" >> /some_path/dev/buildroot/buildroot-2023.02.1/output/build/linux-5.15.16/${dest}/Kconfig ; echo 'obj-y += fbtft/' >> /some_path/dev/buildroot/buildroot-2023.02.1/output/build/linux-5.15.16/${dest}/Makefile
  

出现的问题 #

• 构建完成后再次运行make linux-menuconfig，之前开启的fbtft相关选项全部变回空白
• 生成的镜像中找不到任何fbtft相关内容，内核日志也无对应模块加载信息
• 在目标板上执行find /lib/modules/$(uname -r) -type f -name '*.ko*'，仅输出：

  /lib/modules/5.15.16/extra/xradio_wlan.ko
  

• 已经尝试过清理构建目录后重新编译，问题仍然存在

请问我遗漏了什么关键配置？

内容的提问来源于stack exchange，提问作者no more sigsegv