Re: [PATCH v3] dmaengine: rcar-dmac: use TCRB instead of TCR for residue

From: Kuninori Morimoto
Date: Tue Oct 31 2017 - 23:07:48 EST



Hi Geert, Vinod

Geert, thank you for your report,
Vinod, thank you for your quick help.

> > > This is now commit 847449f23dcbff68 ("dmaengine: rcar-dmac: use TCRB
> > > instead of TCR for residue") in slave-dma/next, and breaks serial console
> > > input on koelsch (shmobile_defconfig) and salvator-x (renesas_defconfig).
> > > Reverting that commit fixes the issue for me.

This patch solved my issue (= sound noise), but it is transferring
large size data. From "transferring data size" point of view,
my sound situation is same as your large serial console input situation?

I will ask this to HW guys.
Thanks

Best regards
---
Kuninori Morimoto