[yocto] [meta-raspberrypi] Adding more screens / PiTFT support.

[Petter Mabäcker]

2016-04-04 15:17 skrev GUEYTAT Julien: 

> Hi, 
> 
> I would like to
add PiTFT support to the meta-raspberry layer. Or at least I would like
to add it in my own BSP layer. 
> 
> I read that Peter were playing with
that recently. Could you please give me some hints to do so? 
> 
> I
have at least two more screens to integrate. 
> 
> If someone could
point me to an example of a BSP based on meta-raspberrypi that would be
awesome. 
> 
> Thanks in advance, 
> 
> Best Regards 
> 
> JULIEN
GUEYTAT 
> 
> INGÉNIEUR INFORMATIQUE 
> 
> 1027, avenue du Docteur
Julien Lefebre BP27 
> 
> 06271 Villeneuve-Loubet Cedex 
> 
> Fixe : +33
(0) 492 024 545
> Mob : +33(0) 617 980 383
> Fax : +33(0) 492 024 546
>
Email : j.gueytat at cdssoft.studiel.fr 
> 
> www : www.studiel.fr [1] 
>

> PPENSEZ ENVIRONNEMENT, IMPRIMEZ SEULEMENT SI NÉCESSAIRE

Hi Julien,


After some discussions with the community, we decided that the
official meta-raspberrypi pitft support should be added using
MACHINE_FEATURES. If you look in README for meta-raspberrypi there are
some basic description about how to enable support: 

For a already
supported pitft model (pitft22 is supported and 28r is on it's way
https://lists.yoctoproject.org/pipermail/yocto/2016-March/029284.html),
you can just add below MACHINE_FEATURES to local.conf:


MACHINE_FEATURES += "pitft pitft22" 

In order to add support for
additional models you can use
https://lists.yoctoproject.org/pipermail/yocto/2016-March/029284.html as
a reference.
 Basically what you need are to: 

* add the overlay for
the screen 

* Add dtoverlay option with wanted default arguments in
rpi-config_git.bb 

* Add a default calibration (if needed) 

Assuming
an overlay exists for your model, it shouldn't be so tricky to fix the
rest.. 

BR Petter 

Petter Mabäcker

Technux
<petter at technux.se>
www.technux.se
 

Links:
------
[1]
http://www.studiel.fr/
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