830e5227d4
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>
26 lines
1.1 KiB
Plaintext
26 lines
1.1 KiB
Plaintext
BR2_arm=y
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BR2_cortex_m4=y
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BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_14=y
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BR2_ROOTFS_POST_BUILD_SCRIPT="board/stmicroelectronics/common/stm32f4xx/stm32-post-build.sh board/stmicroelectronics/stm32f469-disco/post-build.sh"
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BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
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BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/stmicroelectronics/stm32f469-disco/genimage.cfg"
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BR2_LINUX_KERNEL=y
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BR2_LINUX_KERNEL_CUSTOM_VERSION=y
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BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.14.12"
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BR2_LINUX_KERNEL_DEFCONFIG="stm32"
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BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="$(LINUX_DIR)/arch/arm/configs/dram_0x00000000.config board/stmicroelectronics/stm32f469-disco/linux.fragment"
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BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM=y
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BR2_LINUX_KERNEL_IMAGE_TARGET_NAME="zImage"
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BR2_LINUX_KERNEL_DTS_SUPPORT=y
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BR2_LINUX_KERNEL_INTREE_DTS_NAME="stm32f469-disco"
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BR2_PACKAGE_BUSYBOX_CONFIG="package/busybox/busybox-minimal.config"
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BR2_TARGET_ROOTFS_EXT2=y
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BR2_TARGET_ROOTFS_EXT2_SIZE="32M"
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# BR2_TARGET_ROOTFS_TAR is not set
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BR2_TARGET_UBOOT=y
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BR2_TARGET_UBOOT_BOARD_DEFCONFIG="stm32f469-discovery"
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BR2_PACKAGE_HOST_DOSFSTOOLS=y
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BR2_PACKAGE_HOST_GENIMAGE=y
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BR2_PACKAGE_HOST_MTOOLS=y
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BR2_PACKAGE_HOST_OPENOCD=y
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