Hi I'm having trouble getting my 4.3" LCD to work with Debian 9.x (Stretch). The LCD works with the Debian 8.x image (jessie) provided by element14, so I know the hardware is good and connected correctly.
From my understanding, with version 8 the LCD is loaded via kernel overlays, whereas with version 9 it's been migrated to uBoot overlays.
Also from my reading, it sounds like uBoot should detect the LCD and add the overlay automatically. I've tried both the IOT image and the full desktop image, neither one activates the LCD.
Below are my uEnv.txt and syslog files
/boot/uEnv.txt:
#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0
uname_r=4.9.45-ti-r57
#uuid=
#dtb=
###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1
###
###Overide capes with eeprom
#uboot_overlay_addr0=/lib/firmware/<file0>.dtbo
#uboot_overlay_addr1=/lib/firmware/<file1>.dtbo
#uboot_overlay_addr2=/lib/firmware/<file2>.dtbo
#uboot_overlay_addr3=/lib/firmware/<file3>.dtbo
###
###Additional custom capes
#uboot_overlay_addr4=/lib/firmware/<file4>.dtbo
#uboot_overlay_addr5=/lib/firmware/<file5>.dtbo
#uboot_overlay_addr6=/lib/firmware/<file6>.dtbo
#uboot_overlay_addr7=/lib/firmware/<file7>.dtbo
###
###Custom Cape
#dtb_overlay=/lib/firmware/<file8>.dtbo
###
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
#disable_uboot_overlay_emmc=1
#disable_uboot_overlay_video=1
#disable_uboot_overlay_audio=1
#disable_uboot_overlay_wireless=1
#disable_uboot_overlay_adc=1
###
###PRUSS OPTIONS
###pru_rproc (4.4.x-ti kernel)
#uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo
###pru_uio (4.4.x-ti & mainline/bone kernel)
uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo
###
###Cape Universal Enable
enable_uboot_cape_universal=1
###
###Debug: disable uboot autoload of Cape
#disable_uboot_overlay_addr0=1
#disable_uboot_overlay_addr1=1
#disable_uboot_overlay_addr2=1
#disable_uboot_overlay_addr3=1
###
###U-Boot fdt tweaks...
#uboot_fdt_buffer=0x60000
###U-Boot Overlays###
cmdline=coherent_pool=1M net.ifnames=0 quiet
#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M net.ifnames=0 quiet video=HDMI-A-1:1024x768@60e
##Example v3.8.x
#cape_disable=capemgr.disable_partno=
#cape_enable=capemgr.enable_partno=
syslog:
Mar 6 23:32:09 beaglebone kernel: [ 2.839586] bone_capemgr bone_capemgr: slot #0: 'BB-CAPE-DISP-CT43,00A0,Embest,BB-CAPE-DISP-CT4'
Mar 6 23:32:09 beaglebone kernel: [ 2.876830] bone_capemgr bone_capemgr: slot #1: No cape found
Mar 6 23:32:09 beaglebone kernel: [ 2.907839] bone_capemgr bone_capemgr: slot #2: No cape found
Mar 6 23:32:09 beaglebone kernel: [ 2.913668] usb 1-1: new high-speed USB device number 2 using musb-hdrc
Mar 6 23:32:09 beaglebone kernel: [ 2.940330] bone_capemgr bone_capemgr: slot #3: No cape found
Mar 6 23:32:09 beaglebone kernel: [ 2.946424] bone_capemgr bone_capemgr: initialized OK.
Mar 6 23:32:09 beaglebone kernel: [ 2.949063] PM: bootloader does not support rtc-only!
Mar 6 23:32:09 beaglebone kernel: [ 2.950110] omap_rtc 44e3e000.rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
Mar 6 23:32:09 beaglebone kernel: [ 2.950126] of_cfs_init
Mar 6 23:32:09 beaglebone kernel: [ 2.950273] of_cfs_init: OK
Mar 6 23:32:09 beaglebone kernel: [ 2.950808] PM: Hibernation image not present or could not be loaded.
Mar 6 23:32:09 beaglebone kernel: [ 2.953234] Freeing unused kernel memory: 1024K
Mar 6 23:32:09 beaglebone kernel: [ 3.064704] usb 1-1: New USB device found, idVendor=05e3, idProduct=0610
Mar 6 23:32:09 beaglebone kernel: [ 3.064723] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 6 23:32:09 beaglebone kernel: [ 3.064731] usb 1-1: Product: USB2.0 Hub
Mar 6 23:32:09 beaglebone kernel: [ 3.064739] usb 1-1: Manufacturer: GenesysLogic
Mar 6 23:32:09 beaglebone kernel: [ 3.066260] hub 1-1:1.0: USB hub found
Mar 6 23:32:09 beaglebone kernel: [ 3.067388] hub 1-1:1.0: 4 ports detected
Mar 6 23:32:09 beaglebone kernel: [ 3.316415] input: EP0510M09 as /devices/platform/ocp/4819c000.i2c/i2c-2/2-0038/input/input1
Mar 6 23:32:09 beaglebone kernel: [ 3.320633] backlight supply power not found, using dummy regulator
Mar 6 23:32:09 beaglebone kernel: [ 3.324847] pinctrl-single 44e10800.pinmux: pin PIN40 already requested by 0-0070; cannot claim for panel
Mar 6 23:32:09 beaglebone kernel: [ 3.357723] pinctrl-single 44e10800.pinmux: pin-40 (panel) status -22
Mar 6 23:32:09 beaglebone kernel: [ 3.367739] usb 1-1.4: new high-speed USB device number 3 using musb-hdrc
Mar 6 23:32:09 beaglebone kernel: [ 3.379759] pinctrl-single 44e10800.pinmux: could not request pin 40 (PIN40) from group pinmux_bb_lcd_lcd_pins on device pinctrl-single
Mar 6 23:32:09 beaglebone kernel: [ 3.414625] panel panel: Error applying setting, reverse things back
Mar 6 23:32:09 beaglebone kernel: [ 3.427708] panel: probe of panel failed with error -22
Mar 6 23:32:09 beaglebone kernel: [ 3.428201] bone_capemgr bone_capemgr: slot #0: dtbo 'BB-CAPE-DISP-CT4-00A0.dtbo' loaded; overlay id #0
Any help in getting this going would be greatly appreciated.
Thanks,
Aaron