kumquat-buildroot/board/stmicroelectronics/stm32f469-disco/linux-sd.fragment

# CONFIG_XIP_KERNEL is not set
CONFIG_DRM=y
CONFIG_DRM_STM=y
CONFIG_DRM_STM_DSI=y
CONFIG_DRM_PANEL_ORISETECH_OTM8009A=y
CONFIG_FB=y
CONFIG_BACKLIGHT_CLASS_DEVICE=y
configs/stm32f469_disco: enable Linux DRM support The patch [1], which is required for DRM to work properly, has been merged into Linux version 5.14-rc3. There's a 5.14.12 now in stable, so I took that one. After Linux boots, /dev/fb0 will be accessible. You can control the brightness of the display after enabling the framebuffer by running the following commands: ~ # echo 0 0 > /sys/class/graphics/fb0/pan ~ # echo 255 >/sys/class/backlight/40016c00.dsi.0/brightness The brightness ranges from 0 to 255, as you can see running the command: ~ # cat /sys/class/backlight/40016c00.dsi.0/max_brightness [1] 24b5b1978cd5 ("clk: stm32f4: fix post divisor setup for I2S/SAI PLLs") Signed-off-by: Dario Binacchi <dariobin@libero.it> Acked-by: Christophe Priouzeau <christophe.priouzeau@foss.st.com> [Arnout: add explanation to readme.txt] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> 2021-10-17 18:28:38 +02:00			`# CONFIG_XIP_KERNEL is not set`
			`CONFIG_DRM=y`
			`CONFIG_DRM_STM=y`
			`CONFIG_DRM_STM_DSI=y`
			`CONFIG_DRM_PANEL_ORISETECH_OTM8009A=y`
			`CONFIG_FB=y`
			`CONFIG_BACKLIGHT_CLASS_DEVICE=y`