From: emilio@elopez.com.ar (Emilio López)
To: linux-arm-kernel@lists.infradead.org
Subject: [linux-sunxi] Re: [PATCH v4] dma: sun4i: Add support for the DMA engine on sun[457]i SoCs
Date: Tue, 03 Feb 2015 17:18:45 -0300 [thread overview]
Message-ID: <54D12D25.5000408@elopez.com.ar> (raw)
In-Reply-To: <CAKON4Oydvex28FsYsHOr3Cv9othhUqu=xOEuLPMcisLPtc1imA@mail.gmail.com>
Hi,
El 03/02/15 a las 16:39, jonsmirl at gmail.com escibi?:
> Did you fix multiple simultaneous DMA transfers in this? And easy test
> is to start jack audio. Jack will start simultaneous cyclic transfers
> on both the ALSA input and output. Since cyclic transfers never end,
> multiple simultaneous transfers has to work. Last time I tried it I
> got an immediate GPF when the second cyclic transfer was started.
I didn't get a chance to test with jack yet, but I don't see any reason
why two cyclic transfers wouldn't work, assuming they're on different
vchans.
Were you by any chance booting off of NAND by the way? That caused a GPF
because the bootloader left the hardware in a dirty state, but it should
be fixed now.
Cheers,
Emilio
next prev parent reply other threads:[~2015-02-03 20:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-31 22:58 [PATCH v4] DMAEngine support for sun4i, sun5i & sun7i Emilio López
2015-01-31 22:58 ` [PATCH v4] dma: sun4i: Add support for the DMA engine on sun[457]i SoCs Emilio López
2015-02-01 10:03 ` [linux-sunxi] " Priit Laes
2015-02-03 18:43 ` Emilio López
2015-02-03 19:39 ` [linux-sunxi] " jonsmirl at gmail.com
2015-02-03 20:18 ` Emilio López [this message]
2015-02-03 22:47 ` Emilio López
2015-02-04 3:12 ` Vinod Koul
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