linux-kernel - Re: [PATCH 5/5] usb/musb dma: add cppi41 dma driver

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Date:	Fri, 9 Aug 2013 17:21:43 +0300
From:	Felipe Balbi <balbi@...com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC:	Felipe Balbi <balbi@...com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <george.cherian@...com>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>
Subject: Re: [PATCH 5/5] usb/musb dma: add cppi41 dma driver

On Fri, Aug 02, 2013 at 09:24:10PM +0200, Sebastian Andrzej Siewior wrote:
> This driver is currently used by musb' cppi41 couter part. I may merge
> both dma engine user of musb at some point but not just yet.
> 
> The driver seems to work in RX/TX mode in host mode, tested on mass
> storage. I increaed the size of the TX / RX transfers and waited for the
> core code to cancel a transfers and it seems to recover.
> 
> v2..3:
> - use mall transfers on RX side and check data toggle.
> - use rndis mode on tx side so we haveon interrupt for 4096 transfers.
> - remove custom "transferred" hack and use dmaengine_tx_status() to
>   compute the total amount of data that has been transferred.
> - cancel transfers and reclaim descriptors
> 
> v1..v2:
> - RX path added
> - dma mode 0 & 1 is working
> - device tree nodes re-created.
> 
> Cc: Vinod Koul <vinod.koul@...el.com>
> Cc: Dan Williams <djbw@...com>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

Vinod, do you mind if I take this through my tree ? It's tightly related
with the rest of the series.

-- 
balbi

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