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Beaglebone Black and LCD bb-cape-disp-ct43 and Debian 9.3

alager

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

  • 0

    working on this a bit more I  still have no LCD display working.

     

    I added to the top of the /boot/uEnv.txt file

    dtb=am335x-boneblack-overlay.dtb

    which according to https://elinux.org/Beagleboard:BeagleBone_Debian_Image_Migration#Disabling_eMMC_or_HDMI should turn off HDMI.  But maybe it's turning off too much?  See syslog below.

    All virtual overlay commands are commented out.

     

    I can change the dip switches on the cape and the LCD will load to the assigned slot.

    debian@beaglebone:~$ cat /sys/devices/platform/bone_capemgr/slots

    0: PF----  -1

    1: PF----  -1

    2: PF----  -1

    3: P---L-   0 BB-CAPE-DISP-CT43,00A0,Embest,BB-CAPE-DISP-CT4

     

    syslog:

    Mar  9 22:11:00 beaglebone kernel: [    1.821695] bone_capemgr bone_capemgr: slot #3: 'BB-CAPE-DISP-CT43,00A0,Embest,BB-CAPE-DISP-CT4'

    Mar  9 22:11:00 beaglebone kernel: [    1.830940] bone_capemgr bone_capemgr: initialized OK.

    Mar  9 22:11:00 beaglebone kernel: [    1.833495] PM: bootloader does not support rtc-only!

    Mar  9 22:11:00 beaglebone kernel: [    1.834546] omap_rtc 44e3e000.rtc: setting system clock to 2018-03-09 22:10:49 UTC (1520633449)

    Mar  9 22:11:00 beaglebone kernel: [    1.834560] of_cfs_init

    Mar  9 22:11:00 beaglebone kernel: [    1.834697] of_cfs_init: OK

    Mar  9 22:11:00 beaglebone kernel: [    1.835448] PM: Hibernation image not present or could not be loaded.

    Mar  9 22:11:00 beaglebone kernel: [    1.835590] ALSA device list:

    Mar  9 22:11:00 beaglebone kernel: [    1.835596]   No soundcards found.

    Mar  9 22:11:00 beaglebone kernel: [    1.837749] Freeing unused kernel memory: 1024K

    Mar  9 22:11:00 beaglebone kernel: [    1.855591] tilcdc 4830e000.lcdc: no encoders/connectors found

    Mar  9 22:11:00 beaglebone kernel: [    1.991337] usb 1-1: new high-speed USB device number 2 using musb-hdrc

    Mar  9 22:11:00 beaglebone kernel: [    2.143004] usb 1-1: New USB device found, idVendor=05e3, idProduct=0610

    Mar  9 22:11:00 beaglebone kernel: [    2.143023] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0

    Mar  9 22:11:00 beaglebone kernel: [    2.143031] usb 1-1: Product: USB2.0 Hub

    Mar  9 22:11:00 beaglebone kernel: [    2.143038] usb 1-1: Manufacturer: GenesysLogic

    Mar  9 22:11:00 beaglebone kernel: [    2.147406] hub 1-1:1.0: USB hub found

    Mar  9 22:11:00 beaglebone kernel: [    2.148016] hub 1-1:1.0: 4 ports detected

    Mar  9 22:11:00 beaglebone kernel: [    2.195974] input: EP0510M09 as /devices/platform/ocp/4819c000.i2c/i2c-2/2-0038/input/input1

    Mar  9 22:11:00 beaglebone kernel: [    2.196919] backlight supply power not found, using dummy regulator

    Mar  9 22:11:00 beaglebone kernel: [    2.198432] bone_capemgr bone_capemgr: slot #3: dtbo 'BB-CAPE-DISP-CT4-00A0.dtbo' loaded; overlay id #0

     

     

    still looking for advice

    Thanks,

    Aaron

  • 0 in reply to alager

    Still haven't gotten this to work.

     

    $cat /sys/devices/platform/bone_capemgr/slot*

     

    For both Jessie and Stretch I get the same:

    0: PF----  -1

    1: PF----  -1

    2: PF----  -1

    3: P---L-   0 BB-CAPE-DISP-CT43,00A0,Embest,BB-CAPE-DISP-CT4

     

    So why on stretch is the LCD not working?

    Does it have to do with the syslog noting: "backlight supply power not found, using dummy regulator" ?  This message is only present when I boot Stretch.

     

    still looking for advice

    Thanks,

    Aaron