[yocto] [meta-raspberrypi][PATCH v2 3/5] rpi-base.inc: Add overlay for rpi-ft5406

[Petter Mabäcker]

2016-04-14 00:04 skrev Trevor Woerner: 

> On Wed 2016-03-30 @
04:35:47 PM, Petter Mabäcker wrote:
> 
>> rpi-ft5406 is an enabler for
Official Raspberry Pi 7 inch touchscreen support.
> 
> I have an
official raspberry pi 7" touchscreen and it's not obvious to me how
> I
would go about enabling it in my config. If I had one of the others I
would
> simply add:
> 
> MACHINE_FEATURES += "pitft pitft22"
> 
> or
>

> MACHINE_FEATURES += "pitft pitft28r"
> 
> to my conf/local.conf, but
what do I do for the official touchscreen?
> 
> Also, by trial and error
I've discovered that my touchscreen comes up as
> /dev/fb0 and not
/dev/fb1. But the xorg config for touchscreen support assumes
>
/dev/fb1. Am I doing something wrong in my build or can anyone think of
a
> reason why my screen would be /dev/fb0 instead of /dev/fb1?
> 
> By
the way
> 
> MACHINE_FEATURES += "pitft pitft22"
> 
> seems to work for
me if I use /dev/fb0, but I'm not sure if that's a fluke?
> 
> Best
regards,
> Trevor

Hi Trevor, 

Actually it's very simple for the
Official rpi touchscreen. 

1. Ensure that you DON'T have pitft support
enabled when using this touchscreen! (PiTFT uses /dev/fb1, which isn't
the case for the official toucscreen). 

2. Build for example
'core-image-sato' 

3. Add: 

echo "dtoverlay=rpi-ft5406" >>
/path/to/sdcard/boot/config.txt 

...and you are done. 

Like stated in
the commit msg this is just an enabler for being able to configure
rpi-ft5406. When I have time I will send the complete solution for this,
perhaps a good idea is to do like a MACHINE_FEATURES as well, to make it
look similar to the PiTFT's usage? 

BR Petter 

Petter
Mabäcker

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