From: Marek Vasut <marex@denx.de>
To: Huang Shijie <b32955@freescale.com>
Cc: alsa-devel@alsa-project.org, tiwai@suse.de,
artem.bityutskiy@linux.intel.com, perex@perex.cz,
linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org,
Huang Shijie <shijie8@gmail.com>,
linux@arm.linux.org.uk, cjb@laptop.org, lrg@ti.com,
ben-linux@fluff.org, linux-arm-kernel@lists.infradead.org,
Fabio Estevam <fabio.estevam@freescale.com>,
Vinod Koul <vinod.koul@linux.intel.com>,
broonie@opensource.wolfsonmicro.com, linux-mmc@vger.kernel.org,
w.sang@pengutronix.de, linux-kernel@vger.kernel.org, djbw@fb.com,
khali@linux-fr.org, shawn.guo@linaro.org, dwmw2@infradead.org
Subject: Re: [PATCH] dma: add new DMA control commands
Date: Thu, 18 Oct 2012 10:49:21 +0200 [thread overview]
Message-ID: <201210181049.21556.marex@denx.de> (raw)
In-Reply-To: <507FC290.10205@freescale.com>
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?
> thanks
> Huang Shijie
Best regards,
Marek Vasut
next prev parent reply other threads:[~2012-10-18 8:49 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
2012-10-18 7:14 ` Marek Vasut
2012-10-18 7:49 ` Huang Shijie
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
2012-10-18 8:49 ` Marek Vasut [this message]
2012-10-18 9:13 ` Huang Shijie
2012-10-18 10:51 ` Marek Vasut
2012-10-18 15:11 ` Huang Shijie
2012-10-18 8:52 ` Russell King - ARM Linux
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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