On Monday, February 13, 2017 at 10:55:46 AM UTC-5, RobertCNelson wrote:
>
> > Thanks, Robert.  I needed to add the am335x-bbw-bbb-base.h board file 
> and 
> > I'm getting syntax errors on the dts file compile (krogoth, 4.4.11 
> kernel), 
> > but it's a good start.  Thanks! 
>
> If you are using mainline dtc, add: 
>
> DTC_FLAGS += -Wno-unit_address_vs_reg 
>
> I haven't fully pushed mainline dtc over our patched dtc for jessie 
> users, so i don't have that flag enabled by default (yet).. 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

Tried this, and then am335x-boneblack.dtb threw errors...but I did get it 
working.

In the unlikely event that someone else wants to get this display working 
under Yocto (krogoth)...my first advice is don't.  You're probably better 
off moving to a more recent Yocto and using Robert's file.  But I'm under 
pressure to get this working, and my past experience is that changing to a 
new Yocto/kernel version would be another week's work IF there aren't any 
show stoppers.   What I did was 1) translate the dts file into a format 
recognized by krogoth...I think the key issue was that it didn't like 
fragments...and 2) since touchscreen-swapped-x-y apparently wasn't 
supported, I had to swap the x and y sizes in the dts file, and hack the 
driver source to do the swapping.  Oh, and the driver apparently had to be 
compiled into the kernel source, not loaded as a module.  

I don't think it makes sense to share my (already obsolete) dts file or 
driver hack, but if someone wants it, I'll be happy to post.

John

 

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