From: Liam Girdwood <liam.r.girdwood@linux.intel.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org, Mark Brown <broonie@kernel.org>
Subject: Re: [PATCH] ALSA: core: Allow drivers to set R/W wait time.
Date: Thu, 15 Mar 2018 16:07:39 +0000 [thread overview]
Message-ID: <1521130059.7762.298.camel@linux.intel.com> (raw)
In-Reply-To: <s5hin9x76n8.wl-tiwai@suse.de>
On Thu, 2018-03-15 at 15:30 +0100, Takashi Iwai wrote:
> > It's not atm, as it was being set by the driver. Would probably mean an ABI
> > change to PCM ops or a new ioctl ? The latter wont break the ABI and the
> > default
> > value would remain if the ioctl was not called.
>
> Basically this timeout is merely for a safety, wasn't considered as a
> part of the real functionality.
>
> So, with your plan, this is exposed as a real PCM feature, as a part
> of API? For what kind of scenario / purpose?
Use case is XRUN handling, DMA failure or FW crash detection. The shortened
timeout means we can recover far faster leaving a smaller gap in any audio.
Liam
next prev parent reply other threads:[~2018-03-15 16:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-14 20:44 [PATCH] ALSA: core: Allow drivers to set R/W wait time Liam Girdwood
2018-03-14 22:04 ` Takashi Iwai
2018-03-15 13:35 ` Liam Girdwood
2018-03-15 14:30 ` Takashi Iwai
2018-03-15 16:07 ` Liam Girdwood [this message]
2018-03-15 16:25 ` Jaroslav Kysela
2018-03-16 12:35 ` Liam Girdwood
2018-03-16 13:11 ` Takashi Iwai
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