linux-kernel - Re: [PATCH] dmaengine: rcar-dmac: use DMATCRB when xxx_TO

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Message-ID: <87d15kc6ke.wl%kuninori.morimoto.gx@renesas.com>
Date:   Thu, 19 Oct 2017 00:49:47 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>, dmaengine@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@...esas.com>
Subject: Re: [PATCH] dmaengine: rcar-dmac: use DMATCRB when xxx_TO_MEM direction


Hi Laurent, Geert

> >> > That's correct, but I don't think the explanation was detailed and clear
> >> > enough. If it was Geert wouldn't have asked for a v2, and you wouldn't
> >> > have
> >> > agreed to his request :-)
> >>
> >> OK. Let's follow Vinod's decision.
> >>
> >> Vinod, I'm happy if you are OK on v1.
> >> And I'm happy to create v3 patch which includes detail reason
> >> which is explained by Laurent if you want.
> >
> > I'd be happier with v3 :-)

Oops, I didn't explain this.
This DMAC has buffer. thus it will take a while for TCR and TCRB to
become equal. I will add this to log in v3

Best regards
---
Kuninori Morimoto