From: Takashi Iwai <tiwai@suse.de>
To: David Cemin <dcemin@nvidia.com>
Cc: Takashi Iwai <tiwai@suse.com>, Jaroslav Kysela <perex@perex.cz>,
linux-sound@vger.kernel.org, linux-tegra@vger.kernel.org
Subject: Re: [PATCH] ALSA: hda/acpi: add runtime PM suspend/resume to the ACPI controller
Date: Sun, 13 Sep 2026 09:09:51 +0200 [thread overview]
Message-ID: <87jyopwrsw.wl-tiwai@suse.de> (raw)
In-Reply-To: <20260912182120.1156356-1-dcemin@nvidia.com>
On Sat, 12 Sep 2026 20:21:20 +0200,
David Cemin wrote:
>
> The hda-acpi platform driver never enables runtime PM, so
> pm_runtime_force_suspend() in hda_acpi_suspend() skips the runtime
> callbacks. On resume the controller is therefore never re-initialised:
> azx_init_chip() is called only at probe time, so after S3 the codec
> verbs time out and audio is dead until the driver is rebound.
>
> Add explicit runtime_suspend/runtime_resume callbacks and invoke them
> from the system-sleep paths, mirroring the pattern used by snd-hda-intel.
> Tested on an arm64 platform with the NVDA2014 controller: resume latency
> drops from 81.5 s to 3.6 s and audio is live immediately after wake.
>
> Signed-off-by: David Cemin <dcemin@nvidia.com>
Applied to for-next branch. Thanks.
Takashi
prev parent reply other threads:[~2026-09-13 7:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-12 18:21 [PATCH] ALSA: hda/acpi: add runtime PM suspend/resume to the ACPI controller David Cemin
2026-09-13 7:09 ` Takashi Iwai [this message]
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