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Thu, 15 May 2025 14:54:26 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id fEhdDCIAJmgoOwAAD6G6ig (envelope-from ); Thu, 15 May 2025 14:54:26 +0000 Date: Thu, 15 May 2025 16:54:25 +0200 Message-ID: <87o6vtylem.wl-tiwai@suse.de> From: Takashi Iwai To: Daniel Dadap Cc: alsa-devel@alsa-project.org, linux-sound@vger.kernel.org Subject: Re: [PATCH] ALSA: hda - Add new driver for HDA controllers listed via ACPI In-Reply-To: <87r00qx78f.wl-tiwai@suse.de> References: <87r00qx78f.wl-tiwai@suse.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spam-Level: X-Spam-Flag: NO X-Rspamd-Queue-Id: 60A2C1F38A X-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-3.51 / 50.00]; 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DKIM_TRACE(0.00)[suse.de:+] X-Spam-Score: -3.51 On Thu, 15 May 2025 16:45:52 +0200, Takashi Iwai wrote: > > On Thu, 15 May 2025 15:31:46 +0200, > Daniel Dadap wrote: > > > > Some systems expose HD-Audio controllers via objects in the ACPI tables > > which encapsulate the controller's interrupt and the base address for the > > HDA registers in an ACPI _CRS object, for example, as listed in this ACPI > > table dump excerpt: > > > > Device (HDA0) > > { > > Name (_HID, "NVDA2014") // _HID: Hardware ID > > ... > > Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings > > { > > Memory32Fixed (ReadWrite, > > 0x36078000, // Address Base > > 0x00008000, // Address Length > > ) > > Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive, ,, ) > > { > > 0x0000021E, > > } > > }) > > } > > > > Add support for HDA controllers discovered through ACPI, including support > > for some platforms which expose such HDA controllers on NVIDIA SoCs. This > > is done with a new driver which uses existing infrastructure for extracting > > resource information from _CRS objects and plumbs the parsed resource > > information through to the existing HDA infrastructure to enable HD-Audio > > functionality on such devices. > > > > Although this driver is in the sound/pci/hda/ directory, it targets devices > > which are not actually enumerated on the PCI bus. This is because it depends > > upon the Intel "Azalia" infrastructure which has traditionally been used for > > PCI-based devices. > > > > Signed-off-by: Daniel Dadap > > Thanks for the patch. > The code looks fine. Just a nitpicking: > > > +static int __maybe_unused hda_acpi_suspend(struct device *dev) > .... > > +static int __maybe_unused hda_acpi_resume(struct device *dev) > > The __maybe_unused is superfluous when you set up > SYSTEM_SLEEP_PM_OPS() macro instead in the below: > > > +static const struct dev_pm_ops hda_acpi_pm = { > > + SET_SYSTEM_SLEEP_PM_OPS(hda_acpi_suspend, hda_acpi_resume) Also, at the next time, please put the maintainer (me) to Cc. thanks, Takashi