Messages in this thread | | | Date | Thu, 30 May 2013 21:10:46 +0200 | From | Lars-Peter Clausen <> | Subject | Re: [alsa-devel] [PATCH 1/2] dma: Add a PAUSE_RESUME capability |
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On 05/30/2013 06:49 PM, Vinod Koul wrote: > On Wed, 2013-05-29 at 13:42 +0200, Lars-Peter Clausen wrote: >> Add a capability which allows dmaengine consumers to query whether a dmaengine >> controller supports the DMA_PAUSE and DMA_RESUME commands. Sometimes a user of >> the dmaengine API needs to know in advance if a channel will support >> pause/resume. E.g. in ALSA the information whether it is possible to >> pause/resume a audio stream or whether it is necessary to abort and restart the >> stream is communicated to userspace so it can act accordingly. > - This mail-list is not correct for this patch > - use get_maintainer.pl, if you dont know but you already know! > - always CC maintainers
Hm, I have no idea what happened with the Cc list. I might have hit the up key one time to many after --dry-run, since this is the Cc list of a different patch series.
> > the enum dma_transaction_type reports what kind of transactions DMA > controller is capable of. This is not for capabilities of a given > transaction type, so this approach is not right.
hm, ok. > > Unfortunately, this is not supported by dmaengine atm. We had discussed > this in last plumbers, and discussion with Matt was to add capability > API (at least for slave usages). The work from Matt had reached a good > point but unfortunately didn't reach its conclusion. [1] > > Let me resurrect those patches and add the pause, resume query to it in > more generic way
I've pinged Matt about these patches yesterday or so. He has been rather quite lately, maybe he's been sucked into the Linaro blackhole.
- Lars
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