BeagleBone Green's HDMI cape with 2016-04-10 Jessi firmware

[Aitor Ardanza]

Hi all,

I'm trying to operate the Seeds Studio HDMI cape into the BeagleBone Green with last firmware. The LCD screen that I'm using is a 5" size and 800x480 resolution touch screen. I know that this resolution is not supported directly by the beaglebone but as I read is posible to configure beaglebone's out resolution manualy. But that's a problem that I will later. The screen works because if I connet it to the laptop I can see the laptop desktop there.

So with newly installed firmware the output of the "cat /sys/devices/platform/bone_capemgr/slots" command is

 0: PF----  -1 

 1: PF----  -1 

 2: PF----  -1 

 3: P-----  -1 Beaglebone green hdmi cape,00A0,Seeed,BB-GREEN-HDMI

 4: P-O-L-   0 Override Board Name,00A0,Override Manuf,univ-emmc

So with this, I can interpret this firmware brings support for this cape, but is not loaded for some reason...

I try editing the /boot/uEnv.tx file adding "cape_enable=bone_capemgr.enable_partno=BB-GREEN-HDMI" line but it has not been effective.

I found multiple threads with information to disable the hdmi in beaglebone, but nothing about how to activate the hdmi cape. SeedStudio gives you a firmware but is out of date and I want to try to configure it for the last firmaware.

Can anyone give me some tip as to which way to go?

[Robert Nelson]

For this cape, you'll need to downgrade to 3.8.x:

sudo apt-get update

sudo apt-get install linux-image-3.8.13-bone79

sudo reboot

I haven't got it working on v4.1.x yet..

Regards,

--

Robert Nelson
https://rcn-ee.com/

[Aitor Ardanza]

Ok Robert,

Thanks for the info

[zezb...@gmail.com]

Its almost 2018... this cape still doesn't work.

"zcat /proc/config.gz | grep CONFIG_BONE_CAPEMGR" >>reports>> "CONFIG_BONE_CAPEMGR=y" Latest OS fully up to date: bone-debian-9.1-lxqt-armhf-2017-08-31-4gb.img

[Robert Nelson]

Yeah Seeed ported it to v4.4.x.

It needs someone to write and push a real DRM driver to mainline. ( The chipset used is also on a few rockchip boards. )

Regards,

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[tamin...@gmail.com]

Its 2019... this cape still doesn't work.

BB-GREEN-HDMI not loaded (not working)  in 4.14

[Robert Nelson]

On Thu, Jan 10, 2019 at 7:57 AM <tamin...@gmail.com> wrote:
>
>
> Its 2019... this cape still doesn't work.

You forgot to attach your kernel patch. ;)

>
> BB-GREEN-HDMI not loaded (not working) in 4.14

Use v4.4.x

[Piraten fee]

Thanks Robert,

My 4.14  is not patched.

If I use v4.4.x do I need a patch?

Thanks

Falk

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