I.MX6ULL Image Rotation Using PXP

[tkcheng01]

Hi,

I am using i.mx6ull chipset with release fsl-yocto-L4.9.11_1.0.0. I would like to implement framebuffer image rotation (90 degree) using PXP. I manage to run imx-test/Display/pxp_test.out demo on EVK. Below are the snapshot of image for no rotation, with command: .pxp_test.out -I "-o/dev/fb0 -r0"

Diagram 1

When I executed rotation of 90degree with command: ./pxp_test.out -I "-o/dev/fb0 -r90", I would expect the image is rotate 90 degree, with a section of the image fall outside of the LCD screen, as shown below.

Diagram 2

But in actual the output is shown as below.

Diagram 3

We tried to modify the parameter in the pxp_test.c(especially on width, height of srect/drect/s0_param parameters) to try achieve of Diagram2 but it is unsuccessful.

Kindly advise what changes is require in code to get output as in Diagram 2.

It would be very helpful if I can have some documentations on usage of the pxp library

[igorpadykov]

Hi tk

I am not aware of documentation for usage pxp library, but

possible rotation shifting is described in sect.41.3.25 Rotation

i.MX6ULL Reference Manual in "NOTE" on p.2514
http://www.nxp.com/docs/en/reference-manual/IMX6ULLRM.pdf

Best regards
igor
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[tkcheng01]

I found another pxp example(pxp_v4l2_test.out) in the imx-test, which is working. Command i use as below:
pxp_v4l2_test.out -sx 240 -sy 400 -res 400:80 -dst 0:0:240:400 -a 0 -w 2 -f 1 -r 270 daisy-400x240-565.rgb BLANK