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From: Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>
To: Huang Shijie <b32955-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
Cc: Vinod Koul <vinod.koul-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
	djbw-b10kYP2dOMg@public.gmane.org,
	khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org,
	ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
	w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org,
	cjb-2X9k7bc8m7Mdnm+yROfE0A@public.gmane.org,
	dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
	lrg-l0cyMroinI0@public.gmane.org,
	broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org,
	perex-/Fr2/VpizcU@public.gmane.org,
	tiwai-l3A5Bk7waGM@public.gmane.org,
	shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	artem.bityutskiy-VuQAYsv1563Yd54FQh9/CA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
	Huang Shijie <shijie8-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Fabio Estevam
	<fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
Subject: Re: [PATCH] dma: add new DMA control commands
Date: Thu, 18 Oct 2012 12:51:14 +0200	[thread overview]
Message-ID: <201210181251.15116.marex@denx.de> (raw)
In-Reply-To: <507FC827.40601-KZfg59tc24xl57MIdRCFDg@public.gmane.org>

Dear Huang Shijie,

> 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.

Can you please elaborate ?

Best regards,
Marek Vasut

  parent reply	other threads:[~2012-10-18 10:51 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-18  5:32 [PATCH] dma: add new DMA control commands Huang Shijie
2012-10-18  6:18 ` Vinod Koul
2012-10-18  6:45   ` Huang Shijie
     [not found]     ` <507FA595.4020507-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2012-10-18  7:14       ` Marek Vasut
2012-10-18  7:49         ` Huang Shijie
     [not found]           ` <507FB495.7050104-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2012-10-18  8:16             ` Marek Vasut
2012-10-18  8:29               ` Huang Shijie
2012-11-09 15:29                 ` Artem Bityutskiy
2012-10-18  8:49               ` Huang Shijie
     [not found]                 ` <507FC290.10205-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2012-10-18  8:49                   ` Marek Vasut
2012-10-18  9:13                     ` Huang Shijie
     [not found]                       ` <507FC827.40601-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2012-10-18 10:51                         ` Marek Vasut [this message]
     [not found]                           ` <201210181251.15116.marex-ynQEQJNshbs@public.gmane.org>
2012-10-18 15:11                             ` Huang Shijie
2012-10-18  8:52     ` Russell King - ARM Linux
     [not found]       ` <20121018085208.GR21164-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-10-18  9:10         ` Huang Shijie
2012-10-18  9:29     ` Jassi Brar
2012-10-18 15:18       ` Huang Shijie
2012-10-18 15:25         ` Jassi Brar

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