Hi All,
I read on the forum that somebody was kind enough to make the BB View 4” screen working again with recent kernels. I happen to have a 7” screen attached to a BBB that is currenlty running Debian 8.7, I believe with a custom kernel. Would it be possible to get that going with debian 13.5 / kernel 6.18 as well? I know much of the docs and the dbto can still be found online. I can help out, but even though I’m a software engineer, II have no idea where to begin to get this working.
Please share the Serial boot log with recent images so we can see what overlay it’s looking for..
Regards,
HI Robert,
thanks for your quick reply. Let me firt give you some input from the 8.7 uEnv.txt:
##Disable HDMI
cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
cape_enable=capemgr.enable_partno=BB-VIEW-LCD7-01
Also, as far as I can see, there is no i2c eeprom on the cape. There seem to be some pads where one could be, but the position on the PBC is unpopulated, so I’m not sure if there is anything to be learned from anything but the docs.
root@BeagleBone:~# beagle-version
eeprom:[A335BNLT00C0414BBBK1163?]
model:[TI_AM335x_BeagleBone_Black]
dogtag:[BeagleBoard.org Debian Trixie Base Image 2026-05-19]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot SPL 2022.04-g5509547b (Jan 22 2026 - 19:56:08 +0000)]:[location: dd MBR]
bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2014.04-00014-g47880f5]:[location: fatfs /boot/uboot/MLO]
UBOOT: Booted Device-Tree:[am335x-boneblack-uboot.dts]
UBOOT: Loaded Overlay:[BB-ADC-00A0.kernel]
UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0.kernel]
UBOOT: Loaded Overlay:[BB-HDMI-TDA998x-00A0.kernel]
kernel:[6.18.32-bone35]
/boot/uEnv.txt Settings:
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]
pkg:[bb-customizations]:[1.20250808.0-0~trixie+20250808]
pkg:[bb-usb-gadgets]:[1.20260427.1-0~trixie+20260427]
pkg:[bb-wl18xx-firmware]:[1.20230703.0-0~trixie+20240703]
pkg:[kmod]:[34.2-2bbbio1~trixie+20250522]
groups:[remco : remco adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal input render netdev i2c bluetooth gpio admin tisdk weston-launch]
cmdline:[console=ttyS0,115200n8 root=/dev/mmcblk0p3 ro rootfstype=ext4 rootwait fsck.repair=yes earlycon coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100]
dmesg | grep remote
[ 3.592867] remoteproc remoteproc0: wkup_m3 is available
[ 5.835656] remoteproc remoteproc0: powering up wkup_m3
[ 5.883292] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217148
[ 5.929562] remoteproc remoteproc0: remote processor wkup_m3 is now up
[ 17.742178] systemd[1]: Reached target remote-fs.target - Remote File Systems.
[ 57.843603] remoteproc remoteproc1: 4a334000.pru is available
[ 57.905831] remoteproc remoteproc2: 4a338000.pru is available
dmesg | grep pru
[ 57.843603] remoteproc remoteproc1: 4a334000.pru is available
[ 57.905831] remoteproc remoteproc2: 4a338000.pru is available
dmesg | grep pinctrl-single
[ 3.614888] pinctrl-single 44e10800.pinmux: 142 pins, size 568
dmesg | grep gpio-of-helper
dmesg | grep wlcore
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END
dmesg.txt (30.1 KB)
I’ve attached the dmesg. I’ve also attached the user manual.
BB VIEW User Manual V3.pdf (4.0 MB)
If there is anything else I can do or help you with, I’d be very much willing to be involved, but this is a bit outside my comfort zone.
Hi, I just found this: bb.org-overlays/src/arm/BB-VIEW-LCD7-01-00A0.dts at master · beagleboard/bb.org-overlays · GitHub could it be that if I compile this overlay on a recent os I could forcefully load this overlay and taht we’re about half way there?
build it with am335x-debian-13.5-base-v6.18-armhf-2026-05-19-4gb
console text is there. so it works
can’t speak for touch screen
and the above image will not shut down when issueing “sudo poweroff” from command prompt. but does shutdown when pressing poweroff button on the display.
do I need to set some boot params? I’m not seeing anything.
root@BeagleBone:~# beagle-version
eeprom:[A335BNLT00C0414BBBK1163?]
model:[TI_AM335x_BeagleBone_Black]
dogtag:[BeagleBoard.org Debian Trixie Base Image 2026-05-19]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot SPL 2022.04-g5509547b (Jan 22 2026 - 19:56:08 +0000)]:[location: dd MBR]
UBOOT: Booted Device-Tree:[am335x-boneblack-uboot.dts]
UBOOT: Loaded Overlay:[BB-ADC-00A0.kernel]
UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0.kernel]
UBOOT: Loaded Overlay:[BB-VIEW-LCD7-01-00A0]
kernel:[6.18.32-bone35]
/boot/uEnv.txt Settings:
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_addr0=BB-VIEW-LCD7-01-00A0.dtbo]
uboot_overlay_options:[disable_uboot_overlay_video=1]
uboot_overlay_options:[uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade <pkg>]
pkg:[bb-customizations]:[1.20250808.0-0~trixie+20250808]
pkg:[bb-usb-gadgets]:[1.20260427.1-0~trixie+20260427]
pkg:[bb-wl18xx-firmware]:[1.20230703.0-0~trixie+20240703]
pkg:[kmod]:[34.2-2bbbio1~trixie+20250522]
groups:[remco : remco adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal input render netdev i2c bluetooth gpio admin tisdk weston-launch]
cmdline:[console=ttyS0,115200n8 root=/dev/mmcblk0p3 ro rootfstype=ext4 rootwait fsck.repair=yes earlycon coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100]
dmesg | grep remote
[ 2.658787] remoteproc remoteproc0: wkup_m3 is available
[ 5.530421] remoteproc remoteproc0: powering up wkup_m3
[ 5.551877] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217148
[ 5.585466] remoteproc remoteproc0: remote processor wkup_m3 is now up
[ 17.070252] systemd[1]: Reached target remote-fs.target - Remote File Systems.
[ 58.415483] remoteproc remoteproc1: 4a334000.pru is available
[ 58.445449] remoteproc remoteproc2: 4a338000.pru is available
dmesg | grep pru
[ 58.415483] remoteproc remoteproc1: 4a334000.pru is available
[ 58.445449] remoteproc remoteproc2: 4a338000.pru is available
dmesg | grep pinctrl-single
[ 2.700154] pinctrl-single 44e10800.pinmux: 142 pins, size 568
[ 2.853110] pinctrl-single 44e10800.pinmux: Invalid number of rows: 0
[ 2.853138] pinctrl-single 44e10800.pinmux: no pins entries for pinmux_bb_lcd_pwm_backlight_pins
[ 3.882414] pinctrl-single 44e10800.pinmux: Invalid number of rows: 0
[ 3.882435] pinctrl-single 44e10800.pinmux: no pins entries for pinmux_bb_lcd_led_pins
[ 5.699181] pinctrl-single 44e10800.pinmux: pin PIN2 already requested by panel; cannot claim for 481d8000.mmc
[ 5.718325] pinctrl-single 44e10800.pinmux: error -EINVAL: pin-2 (481d8000.mmc)
[ 5.747877] pinctrl-single 44e10800.pinmux: error -EINVAL: could not request pin 2 (PIN2) from group pinmux_emmc_pins on device pinctrl-single
dmesg | grep gpio-of-helper
dmesg | grep wlcore
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
END
I also noticed [ 5.718325] pinctrl-single 44e10800.pinmux: error -EINVAL: pin-2 (481d8000.mmc)but when I check the eMMC overlay and the VIEW overlay, ther is no overlap in pins and more importantly, I can boot from the eMMC, so there shouldn’t be any overlap.
This looks like the internal gpio struct format in the overlay isn’t matching what the kernel is expecting.. best to import and re-format the overlay in syntax 6.18.x expects: see Commits · beagleboard/BeagleBoard-DeviceTrees · GitHub
Regards,