asrc

851931531 — Thu, 10 Nov 2016 02:48:10 GMT

hi ，

I use asrc. The audio path is mem->dma-> asrc->dma->ssi. I use two dma channel. But the dma irq of callback is not execute. I don't know why. Can someone help me?

Our codec use ak7738 (dsp). The code in the attachment.

Original Attachment has been moved to: imx-ssi.c.zip

Original Attachment has been moved to: imx-iflyout0.c.zip

Original Attachment has been moved to: imx-pcm-dma-mx2.c.zip

Re: asrc

igorpadykov — Tue, 15 Nov 2016 05:36:07 GMT

seems similar configuration "mem->dma-> asrc->dma->ssi" is used
on ESAI codec CS42888 SCH-26662 p.5 on Sabre AI board
Schematics (5)
Design files for i.MX 6Quad and i.MX 6DualLite CPU1 Cards
Design files for Base Board (REV E)

http://www.nxp.com/products/software-and-tools/hardware-development-tools/sabre-development-system/sabre-for-automotive-infotainment-based-on-the-i.mx-6-series:RDIMX6SABREAUTO?fpsp=1&tab=Design_Tools_Tab

and one can look at its implementation in attached Linux Manual sect.
29.2.2 Sequence for Memory to ASRC to Peripheral.

Best regards
igor
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asrc

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