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[177.4.161.23]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3081e5fefecsm3182455eec.13.2026.06.12.04.44.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 12 Jun 2026 04:44:40 -0700 (PDT) Message-ID: Date: Fri, 12 Jun 2026 08:44:34 -0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 0/4] ALSA: Consolidate CEA channel allocation data To: Takashi Iwai Cc: Takashi Iwai , Thierry Reding , Jonathan Hunter , Jaroslav Kysela , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, notify@kernel.org References: <20260612-alsa-cea-channel-allocation-v1-0-b1bcbb6b1051@gmail.com> <87ldcki0k3.wl-tiwai@suse.de> From: =?UTF-8?Q?C=C3=A1ssio_Gabriel?= Content-Language: en-US In-Reply-To: <87ldcki0k3.wl-tiwai@suse.de> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------mSCLmRCv9RqdPoIe6T4pH9iC" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------mSCLmRCv9RqdPoIe6T4pH9iC Content-Type: multipart/mixed; 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charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, Iwai-san On 6/12/26 06:13, Takashi Iwai wrote: > On Fri, 12 Jun 2026 06:53:22 +0200, > C=C3=A1ssio Gabriel wrote: >> >> HDA HDMI and Intel HDMI LPE maintain separate copies of the ordered >> CEA-861 channel allocation descriptors, ELD speaker expansion, and >> allocation selection logic. The Intel implementation originated from >> the HDA code, but the copies now differ in supported allocation ranges= >> and fallback behavior. >> >> Move the common data and transformations alongside the PCM DRM ELD >> helpers, then migrate both users while preserving their established >> behavior. HDA retains the complete CA range and channel-count fallback= =2E >> Intel HDMI LPE retains its CA 0x1f limit, ELD speaker bits 0 through 6= , >> and lack of fallback for incompatible ELD data. >> >> The descriptors and their derived channel counts and speaker masks >> become compile-time constants. This removes duplicated mutable >> initialization and provides one authoritative allocation table without= >> changing the existing allocation-selection policy. >> >> No hardware was available to test this patch series. >> >> Signed-off-by: C=C3=A1ssio Gabriel >> --- >> C=C3=A1ssio Gabriel (4): >> ALSA: pcm: Add common CEA channel allocation helpers >> ALSA: hda: Make CEA channel allocation interfaces const >> ALSA: hda: Use common CEA channel allocations >> ALSA: x86: Use common CEA channel allocations >=20 > This looks like a nice cleanup. There is similar code in > sound/soc/codecs/hdmi-codec.c, too. Can we integrate it further in > future? Yes, absolutely, and thanks for pointing that file. I'll work on that. --=20 Thanks, C=C3=A1ssio --------------MueHiew5emScRGiYjxvoHacS-- --------------mSCLmRCv9RqdPoIe6T4pH9iC Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wnsEABYIACMWIQSrYqI5vIrg1X9eqEjQXT8aWv/ugwUCaivxIgUDAAAAAAAKCRDQXT8aWv/ug3V5 AP99eTDpoCnByJwx/MIRMuk3mFaN+LHcjGBudQVwRkIB5gD+IFx+oOCrmEXU89V+1HqfBMj4xClv DqfTU4xvr4ILLw0= =Sp01 -----END PGP SIGNATURE----- --------------mSCLmRCv9RqdPoIe6T4pH9iC--