SK-AM64: Example of usage of BCDMA in Linux sdk

montassir kounsi

Part Number: SK-AM64

Hello,

I'm looking for some examples of using BCDMA in linux sdk. I can see that there's a driver + dma glue layer.

Can you help me on this please ?

Thanks.
Montassir Kounsi

5 months ago

0 montassir kounsi 5 months ago

Prodigy 95 points

To explain more my need : I want to do memory to memory DMA transfers with interrupt.

0 montassir kounsi 5 months ago

Prodigy 95 points

To explain more my need : I want to do memory to memory DMA transfers with interrupt.

0 Andreas Dannenberg 5 months ago in reply to montassir kounsi

TI__Mastermind 42646 points

Do you want to write your own Kernel driver to use BCDMA or what is your use case? If you are planning to use this from userspace I don't think it is easily/readily accessible but I can look closer to see what options there are.

Regards, Andreas

0 montassir kounsi 5 months ago in reply to Andreas Dannenberg

Prodigy 95 points

I want to write my own Kernel driver that will use your BCDMA driver.

0 Andreas Dannenberg 5 months ago in reply to montassir kounsi

TI__Mastermind 42646 points

I was just able to get to check for E2E activity. Let me do some research on this, please allow 1-2 working days for a response.

Regards, Andreas

0 montassir kounsi 4 months ago in reply to Andreas Dannenberg

Prodigy 95 points

Hello Andreas,
Any news on this request ?

Regards, Montassir

+1 Andreas Dannenberg 4 months ago in reply to montassir kounsi

TI__Mastermind 42646 points

Hi!

you can find example uses of the BCDMA by searching the AM6x device tree files for references of main_bcdma, and then tracing those back to the respective driver sources based on searching for the "compatible" strings. Note that the BCDMA is not accessed directly but instead this is done through the DMAEngine Kernel framework (https://docs.kernel.org/driver-api/dmaengine/index.html).

For example...

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c?h=ti-linux-5.10.y#n748

Regards, Andreas

0 montassir kounsi 4 months ago in reply to Andreas Dannenberg

Prodigy 95 points

Thanks Andreas !
I'll check the links you gave me, I'll open a new thread if I have any more questions.

Processors

Processors forum

SK-AM64: Example of usage of BCDMA in Linux sdk