[Angstrom-devel] Angstrom v2015.06 on BeagleBone Black: Black LCD7 display

2015-12-30 Thread Clayton Louden 
Hi everyone,

I've compiled angstrom-v2015.06 for the beaglebone. Unfortunately, no matter 
what I do, I cannot get the LCD7 display (one of these: 
http://elinux.org/CircuitCo:BeagleBone_LCD7) to work. I'm using


bootdelay=0  
dtb=am335x-boneblack-overlay.dtb  


as a uEnv.txt file and the cape seems to be loaded correcly


root@beaglebone:~# cat /sys/devices/platform/bone_capemgr/slots   
0: P---L-   0 4D 7.0 LCD CAPE- 4DCAPE-70T ,00A3,4D SYSTEMS  
,BB-BONE-LCD7-01  
1: PF  -1   
2: PF  -1   
3: PF  -1  


and


root@beaglebone:~# dmesg | grep capemgr  
[4.770384] bone_capemgr bone_capemgr: Baseboard: 
'A335BNLT,00C0,3614BBBK6104'  
[4.777668] bone_capemgr bone_capemgr: 
compatible-baseboard=ti,beaglebone-black - #slots=4  
[4.821749] bone_capemgr bone_capemgr: slot #0: '4D 7.0 LCD CAPE- 4DCAPE-70T 
,00A3,4D SYSTEMS  ,BB-BONE-LCD7-01'  
[4.887718] bone_capemgr bone_capemgr: slot #1: No cape found  
[4.947716] bone_capemgr bone_capemgr: slot #2: No cape found  
[5.007716] bone_capemgr bone_capemgr: slot #3: No cape found  
[5.013789] bone_capemgr bone_capemgr: initialized OK.  
[6.270174] bone_capemgr bone_capemgr: slot #0: dtbo 
'BB-BONE-LCD7-01-00A3.dtbo' loaded; overlay id #0  


But the display stays black. I've fiddled around with a couple of diffent 
kernel options since I saw those on the ancient angstrom 2013 that I still had 
floating around (which does show me the login screen on the lcd) like

CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LCD_CLASS_DEVICE=y
CONFIG_BACKLIGHT_CLASS_DEVICE=y

But they don't seem to do anything. The display hardware works fine, since an 
off the stock debian image and the angstrom I compiled (without changing 
anything) back in 2013 show me a login screen on the lcd. I've also swapped out 
the beaglebone black since I have a second one available, so it's not the BBB 
hardware either. 

I'm feeling like I'm missing something obvious. Is there something I need to 
tell the uBoot to send output to the lcd?
Any help or pointers are greatly appreciated!

Regars, 

C.

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Re: [Angstrom-devel] Angstrom v2015.06 on BeagleBone Black: Black LCD7 display

2015-12-30 Thread Clayton Louden 
Hi again,

On 31.12.2015 02:27, Clayton Louden wrote:
> But the display stays black. I've fiddled around with a couple of diffent 
> kernel options since I saw those on the ancient angstrom 2013 that I still 
> had floating around (which does show me the login screen on the lcd) like
> 
> CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
> CONFIG_LCD_CLASS_DEVICE=y
> CONFIG_BACKLIGHT_CLASS_DEVICE=y

I just ran a diff on the default kernel configs from the v2013 and the v2015-6: 
Tons of stuff changed. There's a couple of things that could be interesting 
like vt, framebuffer and touchscreen options, but since I'm in the deep end 
here, I don't really know what to touch.
The debian image also has fbtft_device but since angstrom v2013 didn't have it, 
I guess I don't need it?

Cheers!

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