linux-kernel - Re: [PATCH v2] avr32: at32ap700x: set DMA slave properties for MCI dw

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Message-ID: <20120830192253.GA10588@samfundet.no>
Date:	Thu, 30 Aug 2012 21:22:53 +0200
From:	Hans-Christian Egtvedt <egtvedt@...fundet.no>
To:	Hein Tibosch <hein_tibosch@...oo.es>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	"ludovic.desroches" <ludovic.desroches@...el.com>,
	Havard Skinnemoen <havard@...nnemoen.net>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Chris Ball <cjb@...top.org>
Subject: Re: [PATCH v2] avr32: at32ap700x: set DMA slave properties for MCI
 dw_dmac

Around Fri 31 Aug 2012 01:07:13 +0800 or thereabout, Hein Tibosch wrote:
> The MCI makes use of the dw_dmac driver when DMA is being used.
> Due to recent changes the driver was broken because:
> - the SMS field in the CTLL register received the wrong value 0
> - a patch in dw_dmac (http://lkml.org/lkml/2012/1/18/52)
> allowed for 64-bit transfers on the memory side, giving an illegal
> value of 3 in the SRC/DST_TR_WIDTH register.
> 
> This patch sets the SMS (Source Master Select) to 1 and limits
> the maximum transfer width to 32 bits.
> 
> Note: this can only be applied after my patch:
> [PATCH v2 2/2] dw_dmac: max_mem_width limits value for
> SRC/DST_TR_WID register
> 
> Signed-off-by: Hein Tibosch <hein_tibosch@...oo.es>

Acked-by: Hans-Christian Egtvedt <egtvedt@...fundet.no>

<snipp diff>

-- 
mvh
Hans-Christian Egtvedt
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