From: vinod.koul@intel.com (Vinod Koul)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] dma: sun4i: expose block size and wait cycle configuration to DMA users
Date: Fri, 11 Mar 2016 11:56:07 +0530 [thread overview]
Message-ID: <20160311062607.GP11154@localhost> (raw)
In-Reply-To: <20160309120627.67612b1d@bbrezillon>
On Wed, Mar 09, 2016 at 12:06:27PM +0100, Boris Brezillon wrote:
> On Tue, 8 Mar 2016 08:25:47 +0530
> Vinod Koul <vinod.koul@intel.com> wrote:
> >
> > Why does dmaengine need to wait? Can you explain that
>
> I don't have an answer for that one, but when I set WAIT_CYCLES to 1
> for the NAND use case it does not work. So I guess it is somehow
> related to how the DRQ line is controlled on the device side...
Is the WAIT cycle different for different usages or same for all
usages/channels?
--
~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vinod.koul@intel.com>
To: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: "Maxime Ripard" <maxime.ripard@free-electrons.com>,
"Dan Williams" <dan.j.williams@intel.com>,
dmaengine@vger.kernel.org, "Chen-Yu Tsai" <wens@csie.org>,
linux-sunxi@googlegroups.com,
"Emilio López" <emilio@elopez.com.ar>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] dma: sun4i: expose block size and wait cycle configuration to DMA users
Date: Fri, 11 Mar 2016 11:56:07 +0530 [thread overview]
Message-ID: <20160311062607.GP11154@localhost> (raw)
In-Reply-To: <20160309120627.67612b1d@bbrezillon>
On Wed, Mar 09, 2016 at 12:06:27PM +0100, Boris Brezillon wrote:
> On Tue, 8 Mar 2016 08:25:47 +0530
> Vinod Koul <vinod.koul@intel.com> wrote:
> >
> > Why does dmaengine need to wait? Can you explain that
>
> I don't have an answer for that one, but when I set WAIT_CYCLES to 1
> for the NAND use case it does not work. So I guess it is somehow
> related to how the DRQ line is controlled on the device side...
Is the WAIT cycle different for different usages or same for all
usages/channels?
--
~Vinod
next prev parent reply other threads:[~2016-03-11 6:26 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-07 9:59 [PATCH] dma: sun4i: expose block size and wait cycle configuration to DMA users Boris Brezillon
2016-03-07 9:59 ` Boris Brezillon
2016-03-07 14:54 ` Vinod Koul
2016-03-07 14:54 ` Vinod Koul
2016-03-07 15:08 ` Boris Brezillon
2016-03-07 15:08 ` Boris Brezillon
2016-03-07 20:30 ` Maxime Ripard
2016-03-07 20:30 ` Maxime Ripard
2016-03-08 2:55 ` Vinod Koul
2016-03-08 2:55 ` Vinod Koul
2016-03-08 2:59 ` Vinod Koul
2016-03-08 2:59 ` Vinod Koul
2016-03-08 7:51 ` Maxime Ripard
2016-03-08 7:51 ` Maxime Ripard
2016-03-08 8:42 ` [linux-sunxi] " Hans de Goede
2016-03-08 8:42 ` Hans de Goede
2016-03-08 10:05 ` Vinod Koul
2016-03-08 10:05 ` Vinod Koul
2016-03-09 10:58 ` Maxime Ripard
2016-03-09 10:58 ` Maxime Ripard
2016-03-08 8:46 ` Boris Brezillon
2016-03-08 8:46 ` Boris Brezillon
2016-03-08 9:10 ` [linux-sunxi] " Priit Laes
2016-03-08 9:10 ` Priit Laes
2016-03-08 10:04 ` Vinod Koul
2016-03-08 10:04 ` Vinod Koul
2016-03-09 10:08 ` [linux-sunxi] " LABBE Corentin
2016-03-09 10:08 ` LABBE Corentin
2016-03-08 9:59 ` Vinod Koul
2016-03-08 9:59 ` Vinod Koul
2016-03-09 10:14 ` Boris Brezillon
2016-03-09 10:14 ` Boris Brezillon
2016-03-11 6:24 ` Vinod Koul
2016-03-11 6:24 ` Vinod Koul
2016-03-11 9:40 ` Boris Brezillon
2016-03-11 9:40 ` Boris Brezillon
2016-03-11 10:06 ` Vinod Koul
2016-03-11 10:06 ` Vinod Koul
2016-03-11 10:26 ` Boris Brezillon
2016-03-11 10:26 ` Boris Brezillon
2016-03-11 11:21 ` Vinod Koul
2016-03-11 11:21 ` Vinod Koul
2016-03-09 11:06 ` Boris Brezillon
2016-03-09 11:06 ` Boris Brezillon
2016-03-11 6:26 ` Vinod Koul [this message]
2016-03-11 6:26 ` Vinod Koul
2016-03-11 9:45 ` Boris Brezillon
2016-03-11 9:45 ` Boris Brezillon
2016-03-11 10:09 ` Vinod Koul
2016-03-11 10:09 ` Vinod Koul
2016-03-11 10:55 ` Maxime Ripard
2016-03-11 10:55 ` Maxime Ripard
2016-03-11 11:18 ` Vinod Koul
2016-03-11 11:18 ` Vinod Koul
2016-03-14 11:46 ` Maxime Ripard
2016-03-14 11:46 ` Maxime Ripard
2016-03-16 3:22 ` Vinod Koul
2016-03-16 3:22 ` Vinod Koul
2016-03-07 15:30 ` [linux-sunxi] " Priit Laes
2016-03-07 15:30 ` Priit Laes
2016-03-07 15:47 ` Boris Brezillon
2016-03-07 15:47 ` Boris Brezillon
2016-03-07 17:15 ` Emilio López
2016-03-07 17:15 ` Emilio López
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