linux-kernel - Re: [PATCH 8/9] ASoC: Intel: bytcr_rt5640: Drop unwanted ignore

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Date:   Thu, 1 Mar 2018 17:17:44 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/9] ASoC: Intel: bytcr_rt5640: Drop unwanted
 ignore_suspend settings

On Thu, Mar 01, 2018 at 05:58:35PM +0100, Hans de Goede wrote:
> On 01-03-18 17:48, Mark Brown wrote:

> > That sounds like what's missing is hookup of whatever the DSP uses to
> > wake the system when it's getting to the bottom of the buffer?  That's
> > the normal way this stuff is implemented anyway.

> I'm afraid there is a lot more missing, at least from a standard Linux
> distro pov, just waking up is not enough, we need to also wakeup
> userspace to get the mp3-player (or whatever) to refill the buffer,
> but preferably without waking up the GPU, turning on the screen, etc.

> AFAIK support for this is currently completely missing, standard Linux
> userspace currently treats suspend-2-idle as a a full suspend and any
> wakeup as a full wakeup.

Sure, but do such userspaces exist - ChromeOS or something for example?

> So AFAICT currently the ignore-suspend flag is currently not useful
> and as the commit message mentions IIRC there were added to fix some
> issues with suspend/resume in the past.

Is it possible the issue was playback during suspend?

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