AM335x McASP: Does the driver support multiple input/output lines (AXR)

Prasant J

Hi,

I'm using McASP to transfer audio on one AXR line/pin and receive audio from another AXR line/pin.

I want to use two AXR lines for transfer and two AXR lines for receiving (McASP supports 4 AXR lines).

I want to know whether the McASP driver supports such a feature? If yes, what is the change in the application side (if any)?

-Prasant

over 13 years ago

0 Prasant J over 13 years ago

Intellectual 510 points

I should add some information to my question:

I'm using arago project linux-am335x kernel.

I'm using: 1 x TX + 1 x RX

but I want to use: 2 x TX + 2 x RX

Any information whether the mcasp driver will support such a configuration.?

-Prasant

0 Gururaja Hebbar over 13 years ago

TI__Intellectual 2725 points

From,

http://e2e.ti.com/support/embedded/linux/f/354/t/154752.aspx

http://e2e.ti.com/support/embedded/linux/f/354/p/114863/411479.aspx#411479

currently multiple-serializers are not supported.

Regards

Gururaja

0 Prasant J over 13 years ago in reply to Gururaja Hebbar

Intellectual 510 points

hi Gururaja,

Thanks for the reply (in both threads). I read from the other posts that, simple changing mcasp driver is not enough, there are changes required in DMA as well.

One more question: I'm assuming that mcasp0 and mcasp1 can be used simultaneously . Is it correct?

-Prasant

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AM335x McASP: Does the driver support multiple input/output lines (AXR)