How to use 2nd IPU unit on imx6

[DraganOstojic]

I'm aware that there are 2 IPU units on imx6. How can I use 2nd IPU unit?

This is in general how I currently use IPU:

// open IPU

int fd_ipu = open("/dev/mxc_ipu", O_RDWR, 0);

// use IPU

...

ioctl(fd_ipu, ..., ...);

// close IPU

close(fd_ipu);

Can this code be extended to differentiate between accessing 1st or 2nd IPU unit?

[rogerio_silva · Accepted solution]

Hi Dragan,

Using the Linux IPU driver, it's not possible to specify what IPU will be used. The driver handles it automatically and assigns each task for the available IPU.

If you want to use both IPUs at the same time (e.g. to process a specific task faster using 2 IPUs), you can open /dev/mxc_ipu once, create 2 threads and call the iotcl to perform the operation you want inside each thread.

I tried this approach and it works.

Rgds

Rogerio

[DraganOstojic]

Hi Rogerio, that is a neat trick. I'll give it a try.

Thanks.