From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: UCM/DAPM - saving power when idle? Date: Fri, 2 Nov 2012 14:30:09 +0000 Message-ID: <20121102143008.GA4413@opensource.wolfsonmicro.com> References: <50925145.4070706@canonical.com> <50929498.60103@ti.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============4577995523153313954==" Return-path: Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 16DB4265092 for ; Fri, 2 Nov 2012 15:30:10 +0100 (CET) In-Reply-To: <50929498.60103@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Liam Girdwood Cc: alsa-devel@alsa-project.org, arun.raghavan@collabora.co.uk, David Henningsson List-Id: alsa-devel@alsa-project.org --===============4577995523153313954== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Ul2mxMk0z4RYCW0d" Content-Disposition: inline --Ul2mxMk0z4RYCW0d Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Nov 01, 2012 at 03:26:16PM +0000, Liam Girdwood wrote: > + Mark and Arun, David, *ALWAYS* CC maintainers. > DAPM also handles the sidetone or FM radio task as described above > too by detecting the source -> sink between two widgets that are not > enabled by the CPU PCM devices (e.g. not DACs or ADCs, etc) and will > then power this path. ...and of course if the driver for whatever device is provding the analogue input is able to update the state of the source then that will integrate nicely with ASoC and we can do the automatic power up/down in the same way as we do for DACs and ADCs. There's a standard helper for integrating with accessory detect like this. --Ul2mxMk0z4RYCW0d Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJQk9jJAAoJELSic+t+oim9cxIP/R9Zp1Q/F0I383TAd9Hydpoi KlN/dGBO9iW94SO3rMvCT1qm7BrHVf3fEMIxP4fbNemXDX62/Be0tOa3mcWaO9CK n3PZLZ5zeh/X0khYOMnXRWSLHoCWCo6Gdjq5ZkCF7NKXjj3/XHjyEDe5D04yo8QE 4ferhDnUff/X4Wbev3z4hUo5gZOFwsEA4rhj3icWxmF+b+PONfmb+rbXTl/yHoNo QksFa4f+Tw9Yjj90myOblQu1FyUpWnigr5yfxrGApFeSzyHfwep8uDXX0rsSgOR0 odFHhsaFlE/MEII8we75Ms3B1Z3+r6DF52MavSiP6ejwpObMGJ2AOD5K0PrQmS45 7QIEx+05TxqRVA88JZitxTeOKLWVLZIpqraM5GjAwM91rXr3v2i9jwP4Pu7XHxRX cQ4UR9/nZL9EmFjDDUjGLb4OGJwXUdte2xjtD1n0pKo1QJCGcXPsiT4sOGa+6Uxo HOM+ARSYkPHdlMNyTfAU78HR7+jgT0VhjO55zk6tI9Yp0SCjLDN2w8CmDlXZ2CSH 9qUp2ij6dGNxeoqkfdGk2JpLUS5Z/B9Hh/jgxy3LG/L7Nc8L36UPq9lv7RJC2Zr5 Q3GVUnRQaLuBM+KTexZ2G1P0hUzJkrlrEnQLWoOZIR2cowxnYTfzQJhpMh4ShBbE azTsnwNlYQ1YmIcPbuGm =BA94 -----END PGP SIGNATURE----- --Ul2mxMk0z4RYCW0d-- --===============4577995523153313954== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --===============4577995523153313954==--