From: Takashi Iwai <tiwai@suse.de>
To: Cezary Rojewski <cezary.rojewski@intel.com>
Cc: alsa-devel@alsa-project.org, upstream@semihalf.com,
Kai Vehmanen <kai.vehmanen@linux.intel.com>,
harshapriya.n@intel.com, rad@semihalf.com,
pierre-louis.bossart@linux.intel.com, tiwai@suse.com,
hdegoede@redhat.com, broonie@kernel.org,
cujomalainey@chromium.org, lma@semihalf.com
Subject: Re: [PATCH 3/4] ALSA: hda: Update and expose codec register procedures
Date: Wed, 09 Feb 2022 15:19:12 +0100 [thread overview]
Message-ID: <s5hpmnwnmvz.wl-tiwai@suse.de> (raw)
In-Reply-To: <397ec3b5-c54c-5b7b-22b1-e34e3afc0943@intel.com>
On Wed, 09 Feb 2022 11:38:23 +0100,
Cezary Rojewski wrote:
>
> On 2022-02-09 11:21 AM, Cezary Rojewski wrote:
> > snd_soc_bind_card() invokes snd_card_register() which in consequence
> > leads to snd_device_register_all() and that to automatic
> > ->dev_register call. That call involves PM operations, and at that
> > moment, codec is not ready for it.
> By that I mean: bus driver (here, avs-driver) has some saying on the
> PM matter too e.g.: sets their (codecs) status to suspended via
> pm_runtime_set_suspended() so the bus runtime suspend is not blocked
> by codecs that could possibly never complete their probing.
Hm, but the runtime PM of hda_codec device is suppressed at first in
snd_hda_codec_device_new() via pm_runtime_forbid(), i.e. the codec
should be kept running until it reaches to snd_hda_codec_register(),
it shouldn't be runtime-suspended beforehand.
I might overlook something, but it's a bit hard to follow...
thanks,
Takashi
next prev parent reply other threads:[~2022-02-09 14:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-07 11:49 [PATCH 0/4] ALSA: hda: Expose codec organization functions Cezary Rojewski
2022-02-07 11:49 ` [PATCH 1/4] ALSA: hda: Add snd_hdac_ext_bus_link_at() helper Cezary Rojewski
2022-02-07 11:49 ` [PATCH 2/4] ALSA: hda: Update and expose snd_hda_codec_device_init() Cezary Rojewski
2022-02-07 11:49 ` [PATCH 3/4] ALSA: hda: Update and expose codec register procedures Cezary Rojewski
2022-02-08 15:54 ` Kai Vehmanen
2022-02-08 16:34 ` Cezary Rojewski
2022-02-08 17:14 ` Takashi Iwai
2022-02-09 10:21 ` Cezary Rojewski
2022-02-09 10:38 ` Cezary Rojewski
2022-02-09 14:19 ` Takashi Iwai [this message]
2022-02-08 17:46 ` Pierre-Louis Bossart
2022-02-09 12:05 ` Cezary Rojewski
2022-02-09 16:08 ` Pierre-Louis Bossart
2022-02-11 14:42 ` Cezary Rojewski
2022-02-11 15:23 ` Pierre-Louis Bossart
2022-02-14 9:54 ` Cezary Rojewski
2022-02-07 11:49 ` [PATCH 4/4] ALSA: hda: Expose codec cleanup and power-save functions Cezary Rojewski
2022-02-07 12:35 ` [PATCH 0/4] ALSA: hda: Expose codec organization functions Pierre-Louis Bossart
2022-02-08 10:00 ` Cezary Rojewski
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