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Received: from relay2-d.mail.gandi.net ([217.70.183.194]) by casper.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i04n9-0006zI-6O for linux-arm-kernel@lists.infradead.org; Tue, 20 Aug 2019 14:07:21 +0000 X-Originating-IP: 86.250.200.211 Received: from localhost (lfbn-1-17395-211.w86-250.abo.wanadoo.fr [86.250.200.211]) (Authenticated sender: maxime.ripard@bootlin.com) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id 1A36340004; Tue, 20 Aug 2019 14:06:29 +0000 (UTC) Date: Tue, 20 Aug 2019 16:06:29 +0200 From: Maxime Ripard To: Mark Brown Subject: Re: Best representation for TDM devices Message-ID: <20190820140629.qxhjlhcwvdphpimv@flea> References: <20190801114807.GB5488@sirena.org.uk> <20190814160234.GG4640@sirena.co.uk> <20190819084141.otpbos2fgxav7rco@flea> <20190819154514.GB5563@sirena.co.uk> MIME-Version: 1.0 In-Reply-To: <20190819154514.GB5563@sirena.co.uk> User-Agent: NeoMutt/20180716 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190820_150719_271373_D3432E01 X-CRM114-Status: GOOD ( 21.26 ) 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="===============8302806195797070738==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============8302806195797070738== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="g4wssaeu7tfooa4y" Content-Disposition: inline --g4wssaeu7tfooa4y Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Aug 19, 2019 at 04:45:14PM +0100, Mark Brown wrote: > 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. Ok, I'll have a look, thanks! Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --g4wssaeu7tfooa4y Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXVv+ZQAKCRDj7w1vZxhR xXVFAP46R8G3YfCMc3AL3HMp6M8ibBWNVhILkDT3D506zedV9QD9FgkHZwYNDuPR wB4ytgX2kUV9uypIj0glURJAbQNQuAc= =T2F0 -----END PGP SIGNATURE----- --g4wssaeu7tfooa4y-- --===============8302806195797070738== 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 --===============8302806195797070738==--