Re: [PATCH] dma: tegra: implement flags parameters for cyclic transfer

[Laxman Dewangan]

On Thursday 20 December 2012 10:16 PM, Stephen Warren wrote:
> On 12/19/2012 11:11 PM, Laxman Dewangan wrote:
> > On Wednesday 19 December 2012 10:32 PM, Stephen Warren wrote:
> > > On 12/19/2012 06:40 AM, Laxman Dewangan wrote:
> > > > The flag parameter is added in the cyclic transfer request.
> > > > Use the flag option of:
> > > > - DMA_PREP_INTERRUPT for enabling interrupt.
> > > > - DMA_CTRL_ACK for deciding whether ack is requred or not for
> > > >     descriptor.
> > > Do the relevant drivers that use Tegra's DMA engine already set flags
> > > correctly, so that this change won't cause any regressions?
> > Currently, the sound soc driver uses the cyclic mode of dma transfer and
> > it has already enable the proper flags. This was done recently after
> > adding flags in cyclic api.
> > Also, there was bug in our dma driver for not setting DMA_CTRL_ACK by
> > default for cyclic case.
> > This will fix the issue.
> OK. I assume "This was done recently after adding flags in cyclic api."
> was a patch that went into 3.8?  So, this patch is a bug-fix that should
> be included in 3.8 then?
I can see this in Linux 3.7 tag.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=history;f=drivers/dma/tegra20-apb-dma.c;h=528c62dd4b00e1b52928ff66f3a54e7ae206680f;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e
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