Use IRAM for DMA transfer in iMX35

[NickRao]

Can internal RAM be used for DMA transfer in iMX35?

I want to use IRAM for the transfering audio data over iMX35 MediaLB port to the INIC OS81050 using synchronous channel.

But when I use IRAM for buffering the audio data, I get only the noise. I suspect the problem could be because of using the internal RAM.

The reason I suspect IRAM being, I dont see any problem when the use EMI memory for the same pusrpose.

I would really appreciate any kind of help fpr this problem I am facing.

Thanks in Advance.

Regards,

Nikhil Rao.

[fabio_estevam]

Yes, we use IRAM for audio playback on SDK1.5 Linux BSP.

Regards,

Fabio Estevam

[NickRao]

Thanks for your reply.

Does using IRAM have any influence on the audio playback? I see IRAM is being used in the i.MX37 but the option is not set in i.MX35.

Looking forward more pointers on this.

Thanks and Regards,

Nikhil Rao.

[fabio_estevam]

Yes, IRAM is used for audio playback on MX35.

On SDK1.5:

./ltib -c

[*] Configure the kernel

Device Drivers --->

Sound--->

Advanced Linux Architecture --->

System on Chip audio support --->

and then you can see that the following is select as default:

[*] Locate Audio DMA playback buffers in IRAM

Regards,

Fabio Estevam