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Date: Thu, 18 Oct 2012 17:13:11 +0800
From: Huang Shijie <b32955@freescale.com>
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To: Marek Vasut <marex@denx.de>
CC: Vinod Koul <vinod.koul@linux.intel.com>, <djbw@fb.com>,
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        Huang Shijie <shijie8@gmail.com>,
        Fabio Estevam <fabio.estevam@freescale.com>
Subject: Re: [PATCH] dma: add new DMA control commands
References: <1350538335-29026-1-git-send-email-b32955@freescale.com> <201210181016.06782.marex@denx.de> <507FC290.10205@freescale.com> <201210181049.21556.marex@denx.de>
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于 2012年10月18日 16:49, Marek Vasut 写道:
> Dear Huang Shijie,
>
>> 于 2012年10月18日 16:16, Marek Vasut 写道:
>>> So we can't stream data from the chip? About time to adjust the MTD
>>> framework to allow that. Maybe implement a command queue?
>> IMHO, it's not possible. Because the READ-PAGE(00h-30h) command needs to
>> check the busy status
>> which means we have to stop in the middle, so we can not chain the all
>> the read-pages DMA commands.
> Can the DMA not branch?
it's too complicated to the MTD layer, as well as the gpmi driver.

Best Regards
Huang Shijie


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