No progress on using the 7'' official touchscreen with the RPi

Leon Anavi leon.anavi at konsulko.com
Thu Aug 18 11:00:17 EDT 2016


Hi Roland,


On 18.08.2016 17:55, Roland Krause wrote:
> Leon - thanks for sending this note.
> Changhyeok and Tom - thanks for making this happen. What a big step 
> forward!
>
> I will be building an image this week and will give it a spin over the 
> weekend. My plan is to use the RPi with the 7'' touchscreen for the 
> hands on.
>

Nice, I have all the required hardware so please let me know when the 
image is available. I will be happy to help you with what I can and have 
a look on it in my spare time.

Best regards, Leon

> Best Regards
> Roland
>
>
>
> On Thu, Aug 18, 2016 at 7:52 AM, Leon Anavi <leon.anavi at konsulko.com 
> <mailto:leon.anavi at konsulko.com>> wrote:
>
>     Hi Tom, Changhyeok, Roland,
>
>     For the record, as of today the official 7" touch screen display
>     is with GDP (built from branch master) on both Raspberry Pi 2 and
>     3. I have built an image from scratch and tested in successfully
>     on both boards.
>
>     Tom, Changhyeok, well done! Raspberry Pi is probably the most
>     popular single board computer and for the community it is great to
>     have its touchscreen working :)
>
>     Best regards, Leon
>
>     On 5.04.2016 16:40, Roland Krause wrote:
>>     Tom.
>>
>>     On Tue, Apr 5, 2016 at 12:37 AM, Tom Pollard
>>     <tom.pollard at codethink.co.uk
>>     <mailto:tom.pollard at codethink.co.uk>> wrote:
>>
>>         Hi Roland hope you are well,
>>
>>     a bit of a sleepless night over this but I am used to that.
>>
>>         > On Mon, Apr 4, 2016 at 5:02 PM, Roland Krause <rkrause at ics.com
>>         <mailto:rkrause at ics.com>
>>         > <mailto:rkrause at ics.com <mailto:rkrause at ics.com>>> wrote:
>>         >
>>         >     So I've tried out a build where i tried to follow this
>>         blog post
>>         > http://blog.unixshell.se/?p=27 <http://blog.unixshell.se/?p=27>
>>
>>         Looking at the guide briefly it looks like you need to clone
>>         and include
>>         his layer to follow the guide:
>>
>>         git clone https://github.com/erikboto/meta-erborpi.git
>>         <https://github.com/erikboto/meta-erborpi.git>
>>
>>         In that layer, he has a patch dir in which there is a patch
>>         that looks
>>         to alter the path to the dtb overlays and adds
>>         overlays/rpi-ft5406-overlay.dtb which I guess would then
>>         allow bitbake
>>         to handle the specified dtb. It also looks like he has bsp
>>         boot config
>>         append to update config.txt.
>>
>>         Sorry if I've misunderstood your current process at all,
>>
>>     I tried to adopt this without using his specific layer - just to
>>     get the ft5406 dtb but I failed.
>>
>>     My request is that someone more knowledgeable that I in Yocto
>>     please adopt this and add the rpi_ft5406 module to
>>     the current raspberrry pi branch.
>>
>>     However, yesterday very late I did end up with the module being
>>     loaded but weston fails to start. What I did was manually updating
>>     some of the firmware using the rpi-update script.
>>
>>     However I noticed that our boot structure is different than the
>>     script assumes. For some reason our kernel is not on the boot
>>     partitions
>>     /dev/mmcblk0p1 but on /dev/mmcblk0p2 !
>>
>>     So many things are really strange, super hard to do and
>>     non-standard - if feels like swimming agains the stream -
>>     wow !
>>
>>     Roland
>>
>>
>>         Tom
>>
>>
>>         >     that has some hints and ideas on how to get the
>>         official ts to work
>>         >     with a yocto build but I can not get the rpi_ft5406
>>         driver to show
>>         >     up in any kernel logs, or as an input device.
>>         >
>>         >     It looks like I am  missing rpi-ft5406-overlay.dtb
>>         >     And if i try following the directions from the blog and
>>         do a
>>         >     echo 'KERNEL_DEVICETREE_append = "
>>         overlays/rpi-ft5406-overlay.dtb"'
>>         >     >> conf/local.conf22:28
>>         >     rokrau_then bitbake fails22:28
>>         >     rokrau_| make[3]: *** No rule to make target
>>         >     `arch/arm/boot/dts/overlays/rpi-ft5406-overlay.dtb'. Stop.
>>         >
>>
>>
>>
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>
>     -- 
>     Leon Anavi
>     Software Engineer
>     konsulko.com <http://konsulko.com>
>
-- 
Leon Anavi
Software Engineer
konsulko.com
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