From: marex@denx.de (Marek Vasut)
To: linux-arm-kernel@lists.infradead.org
Subject: [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@freescale.com>
Dear Huang Shijie,
> ? 2012?10?18? 16:49, Marek Vasut ??:
> > Dear Huang Shijie,
> >
> >> ? 2012?10?18? 16:16, Marek Vasut ??:
> >>> 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
next prev 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
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
2012-10-18 9:13 ` Huang Shijie
2012-10-18 10:51 ` Marek Vasut [this message]
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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