Re: Problem with touchscreen Display 1366x768 with Qt 5.9 and eglfs

[Benjamin Federau <benjamin.federau@basyskom.com>]

[-- Attachment #1: Type: text/plain, Size: 1954 bytes --]

Von:   Johannes Pointner <h4nn35.work@gmail.com> 

 Gesendet:   08.08.2017 9:15 
 Betreff:   Re: [meta-freescale] Problem with touchscreen Display 1366x768 with Qt 5.9 and eglfs 

2017-08-07 17:02 GMT+02:00 Otavio Salvador <otavio.salvador@ossystems.com.br>: 
> On Mon, Aug 7, 2017 at 11:51 AM, Benjamin Federau 
> <benjamin.federau@basyskom.com> wrote: 
>> Von: Otavio Salvador <otavio.salvador@ossystems.com.br> 
>> Gesendet: 11.07.2017 17:16 
>> Betreff: Re: [meta-freescale] Problem with touchscreen Display 1366x768 with 
>> Qt 5.9 and eglfs 
>> 
>> On Tue, Jul 11, 2017 at 10:16 AM, Benjamin Federau 
>> <benjamin.federau@basyskom.com> wrote: 
>>> the bpp was set to 16, so I set it as you wrote to 32. But the Qt 
>>> application still crashes with "EGL Error : Could not create the egl 
>>> surface: error = 0x3003" 
>>> 
>>> So on our setup a Qt application with eglfs works with a 1366x768 
>>> resolution? 
>>> 
>>> After setting the bpp I get a Kernel message, jfyi 
>>> [  198.087193] mxc_sdc_fb fb@0: 1366x768 h_sync,r,l: 40,110,220 
>>> v_sync,l,u: 
>>> 5,5,20 pixclock=83125000 Hz 
>>> 
>>> I'm not sure if I understand the thing with the burst size you mentioned. 
>> 
>> Are you using the Qt commercial layer? 
>> 
>> 
>> No. I use meta-boot2qt from http://code.qt.io/cgit/yocto/meta-boot2qt.git/ 
> 
> In this case, Qt ought to provide support for you. 
> 
> I don't think you need to use the commercial Qt from your description 
> so if you want we, O.S. Systems, can help you. If there is interest 
> please let us know and I can forward our services portfolio. 
 
If you are using lvds I think your problem could be related to this 
https://community.nxp.com/message/860347 
I use dev=hdmi in my video parameter for my display. But I tried the suggested patch in that thread and it works for me.
The error is gone and the Qt application starts on the 1366x768 resolution now.

Thanks!

[-- Attachment #2: Type: text/html, Size: 2574 bytes --]