[alsa-devel] [PATCH] ALSA: hda - delay resume haswell hdmi codec in system resume

Lin, Mengdong mengdong.lin at intel.com
Fri Apr 5 18:58:54 CEST 2013

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai at suse.de]
> Sent: Tuesday, April 02, 2013 5:53 PM
> To: Lin, Mengdong
> Cc: alsa-devel at alsa-project.org
> Subject: Re: [alsa-devel] [PATCH] ALSA: hda - delay resume haswell hdmi codec
> in system resume
> At Tue, 26 Mar 2013 07:02:54 +0000,
> Lin, Mengdong wrote:
> >
> > Is it okay to add a new parameter to snd_hda_resume(), to indicate whether
> codec resume should be delayed or not?
> > Is because snd_hda_resume() is only only called by azx_resume() but also
> called by azx_bus_reset().
> > The latter can be called on a fatal verb execution failure and codec resume
> delay is not suitable for this case.
> Well, I prefer creating a new function (e.g. snd_hda_bus_reset()) called from
> azx_bus_reset().
> Takashi

Hi Takashi,

Do you mean that in azx_bus_reset(), we can merge the snd_hda_suspend() and snd_hda_resume() to a new function like snd_hda_bus_reset()?
snd_hda_suspend() and snd_hda_resume() look symmetrical here and so I don't want to destroy the symmetry.

static void azx_bus_reset(struct hda_bus *bus)
#ifdef CONFIG_PM
	if (chip->initialized) {
		struct azx_pcm *p;
		list_for_each_entry(p, &chip->pcm_list, list)
	bus->in_reset = 0;


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