topic Re: iMX6 display rotation example fail at resolution 1280x800 in i.MX Processors

iMX6 display rotation example fail at resolution 1280x800

ivanpankratov — Mon, 08 May 2017 14:32:32 GMT

Hello,

I am trying to run a rotation example from here: GitHub - rogeriorps/ipu-examples: IPU example codes for i.MX5 and i.MX6 families

My display resolution is 1280x800. When I take the same size input image the provided example able to perform all flips but not to rotate:

isize value 2048000
Rotation 0 time: 4741 usecs
Rotation 1 time: 4589 usecs
Rotation 2 time: 4554 usecs
Rotation 3 time: 4615 usecs
[19493.497581] mxc_ipu mxc_ipu: ERR: no-0x0,ipu_queue_task err:-22
ioct IPU_QUEUE_TASK fail

If I take 1024x768 input image and 1280x800 output resolution -- the same result.

But if I take 1024x768 input and output resolutions, all possible 8 flips and rotations work, though I observe an interlaced garbage on my screen, due to wrong output resolution:

isize value 1572864
Rotation 0 time: 6144 usecs
Rotation 1 time: 6166 usecs
Rotation 2 time: 6152 usecs
Rotation 3 time: 6152 usecs
Rotation 4 time: 29750 usecs
Rotation 5 time: 21677 usecs
Rotation 6 time: 21586 usecs
Rotation 7 time: 21605 usecs

I understand that this is related to IPU's rotator limitation of 1024x1024 pixel size, but still, how to make all rotations work? I am running it on kernel 4.1.15.

Thanks, Ivan

Re: iMX6 display rotation example fail at resolution 1280x800

igorpadykov — Mon, 08 May 2017 23:19:07 GMT

Hi Ivan

IPU does not support rotation (limitation of IC module) above 1024x1024,
so one needs to split image on smaller areas and rotate them, after that combine
to whole image. Please check for example below

https://community.freescale.com/message/567360#567360

Best regards
igor
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Re: iMX6 display rotation example fail at resolution 1280x800

ivanpankratov — Tue, 09 May 2017 13:45:35 GMT

Thanks Igor, will take a look.

Don't you have it implemented as a fb driver?