Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753043AbbD3UMi (ORCPT ); Thu, 30 Apr 2015 16:12:38 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:44550 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750839AbbD3UMe (ORCPT ); Thu, 30 Apr 2015 16:12:34 -0400 Date: Thu, 30 Apr 2015 21:12:07 +0100 From: Mark Brown To: Koro Chen Cc: Sascha Hauer , robh+dt@kernel.org, matthias.bgg@gmail.com, perex@perex.cz, tiwai@suse.de, srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org, galak@codeaurora.org, lgirdwood@gmail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org Message-ID: <20150430201207.GK22845@sirena.org.uk> References: <1428653649-38200-1-git-send-email-koro.chen@mediatek.com> <1428653649-38200-2-git-send-email-koro.chen@mediatek.com> <20150418173407.GE26185@sirena.org.uk> <20150420043747.GH6325@pengutronix.de> <20150420204849.GJ14892@sirena.org.uk> <1429672640.14162.55.camel@mtksdaap41> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="Zc0AcwaKuEyWL+br" Content-Disposition: inline In-Reply-To: <1429672640.14162.55.camel@mtksdaap41> X-Cookie: Your present plans will be successful. User-Agent: Mutt/1.5.23 (2014-03-12) X-SA-Exim-Connect-IP: 94.175.94.161 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Re: [RESEND RFC PATCH 1/3] ASoC: mediatek: Add binding support for AFE driver X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1856 Lines: 44 --Zc0AcwaKuEyWL+br Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Apr 22, 2015 at 11:17:20AM +0800, Koro Chen wrote: > If using DPCM, it seems the most suitable FE DAIs will be memif, and > external interface like I2S should be BE DAIs. Do you think it is > suitable for our memif to be FE DAIs? Then which memif to used can be > described in a machine driver's FE DAIs. But I think this has a problem > that our memif is one-direction, playback or capture. So the binded pcm > device cannot have playback and capture capability together. May it > cause trouble for user space apps that assumes there will be pcmC0D0p, > pcmC0D0c? I think the only userspace application you really have to worry about here is PulseAudio which (at least with UCM) should be able to cope since it needs to handle things like USB microphones. I think everything else I can think of can either cope or has to handle the same use cases as PulseAudio does so should have support. --Zc0AcwaKuEyWL+br Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJVQoyWAAoJECTWi3JdVIfQ39IH/0AcULgyvIUMLo5A+Zi5EOD2 8LdacMZp5UHIr7/EeNyssa6C3uzrFPxZ95YAbq1wCOtKYtEZbw9XYh2EzzocEvRk C+RyzqX1yNs8IxkPsTFRQU7Upo+W3Q1SzjaVcTnJBYlrB5tAsYGuODhW51LQZZgf M9BH9hQ0sBKm6SJkshpE7i3D/AJDHSSW54ntIJIV+7PkLJYZ3LIEQAGPOzQZoYNj 2BCtSg0LzuZKLzbBEbjgMKIgyzdtFsbXsr7mBpjsQuNpgR6+YjXYimWWhVJTqQdx qm713NAaJA0bYH1cE55JJ1j0KAwUA58a1lGRZYuiVgBSP77wylnvsdPsi5hNQR0= =go0X -----END PGP SIGNATURE----- --Zc0AcwaKuEyWL+br-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/