From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Brown <broonie@kernel.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: add xtensa xtfpga I2S interface and
 platform
Date: Tue, 28 Oct 2014 17:06:44 +0000
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To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>, alsa-devel@alsa-project.org, Mark Rutland <mark.rutland@arm.com>, devicetree@vger.kernel.org, Pawel Moll <pawel.moll@arm.com>, linux-xtensa@linux-xtensa.org, Takashi Iwai <tiwai@suse.de>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Liam Girdwood <lgirdwood@gmail.com>, Rob Herring <robh+dt@kernel.org>, linux-kernel@vger.kernel.org, Kumar Gala <galak@codeaurora.org>, Grant Likely <grant.likely@linaro.org>
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On Tue, Oct 28, 2014 at 05:39:13PM +0100, Lars-Peter Clausen wrote:
> On 10/28/2014 05:04 PM, Mark Brown wrote:

> >Is that going to play nicely with the fact that the interrupt can be
> >shared and the desire to (AFAICT) do NAPI style stuff with the interrupt
> >disabled for long periods?

> Threaded interrupts got support for interrupt sharing a while ago, so I
> guess yes. I think it will even work better than the tasklet approach. You
> can configure the IRQ to disable itself as long as the thread is running.

I know you *can* share threaded interrupts, I'm just not sure that
hogging the threaded handler plays nicely with other users.  Though now
I look at this again tx_fifo_high is a "constant" so it's not actually
trying to do a NAPI type mitigation thing and this is really just an
open coded threaded interrupt as you say.

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