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[2a01:7e01::f03c:91ff:fed4:a3b6]) by smtp-relay.gmail.com with ESMTPS id z7sm237809wrl.24.2019.08.19.08.45.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Aug 2019 08:45:16 -0700 (PDT) X-Relaying-Domain: sirena.org.uk Received: from ypsilon.sirena.org.uk ([2001:470:1f1d:6b5::7]) by heliosphere.sirena.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1hzjqN-0005dS-HF; Mon, 19 Aug 2019 15:45:15 +0000 Received: by ypsilon.sirena.org.uk (Postfix, from userid 1000) id 7364D274314C; Mon, 19 Aug 2019 16:45:14 +0100 (BST) Date: Mon, 19 Aug 2019 16:45:14 +0100 From: Mark Brown To: Maxime Ripard Subject: Re: Best representation for TDM devices Message-ID: <20190819154514.GB5563@sirena.co.uk> References: <20190801114807.GB5488@sirena.org.uk> <20190814160234.GG4640@sirena.co.uk> <20190819084141.otpbos2fgxav7rco@flea> MIME-Version: 1.0 In-Reply-To: <20190819084141.otpbos2fgxav7rco@flea> X-Cookie: QOTD: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190819_084518_168948_ED6A083A X-CRM114-Status: GOOD ( 15.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ali Burak =?utf-8?B?UGFyxLFt?= , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============3055841277104800447==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============3055841277104800447== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="V0207lvV8h4k8FAm" Content-Disposition: inline --V0207lvV8h4k8FAm Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Aug 19, 2019 at 10:41:41AM +0200, Maxime Ripard wrote: > On Wed, Aug 14, 2019 at 05:02:34PM +0100, Mark Brown wrote: > > OK, in that case I'd recommend providing them to userspace as a single > > four channel stream - keeping everything bundled together as long as > > possible to make it easier to keep the processing synced up. > Ok, that's what I had in mind as well :) > However, it looks like we can only capture as many channels as the max > being exposed by the codec on the link? > Any attempt at capturing something with 4 channels here using arecord > was either reduced to two channels (the amount of channels provided by > the adau7002 driver), or just refused by the ALSA core. > Is there anything that we need to configure / work on to enable this? I'd expect there's some issue in the capability/constraint matching code that needs fixing - that should work but I can totally see it not working unless someone goes in and does something to fix it. --V0207lvV8h4k8FAm Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl1axAkACgkQJNaLcl1U h9DN2gf7Bf++v8q3GlhushNkXwJA3cRBBZMFxGk3jmZyz59uOpue2Q0OhqMbcmy7 9D5Tm2Z7NOpRc99tevcVQepB5ZtXkZZcUUUZ0mZfcuYPECbrqWwYwVtnsDZXQldw DPZYSWKR4mYJM7WyduIUxgB5WB+CrkFzkkOmiuEbLH3vC4tnTi/2N+oT+boDOnUU jkA4PTJEstBIOfiZPyVek7IS/r4kfvTuFaxYQPmk/+VMcn6UYO97V9VA/EkSEney hTfEzz9J1IP5lYwKcF8r4HcE2tPH6ftjUzKzZXsnAOOvOFJbjizbcPeJr0rgIvft jR1kwhYl5qwkQA4DwLSLDDYKwwJShQ== =t1rn -----END PGP SIGNATURE----- --V0207lvV8h4k8FAm-- --===============3055841277104800447== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============3055841277104800447==--