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Wed, 20 May 2020 04:59:23 -0500 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 20 May 2020 04:59:23 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Wed, 20 May 2020 04:59:23 -0500 Received: from [192.168.2.6] (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04K9xLuv105835; Wed, 20 May 2020 04:59:21 -0500 Subject: Re: [PATCH v2 2/3] bindings: sound: Add documentation for TI j721e EVM (CPB and IVI) To: Rob Herring References: <20200512131633.32668-1-peter.ujfalusi@ti.com> <20200512131633.32668-3-peter.ujfalusi@ti.com> <20200519224215.GB488519@bogus> From: Peter Ujfalusi X-Pep-Version: 2.0 Message-ID: Date: Wed, 20 May 2020 12:59:57 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200519224215.GB488519@bogus> Content-Type: multipart/mixed; boundary="------------B17804B71D9C95B8A8C1439A" Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, broonie@kernel.org, lgirdwood@gmail.com, linux-kernel@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" --------------B17804B71D9C95B8A8C1439A Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi Rob, On 20/05/2020 1.42, Rob Herring wrote: > On Tue, May 12, 2020 at 04:16:32PM +0300, Peter Ujfalusi wrote: >> The audio support on the Common Processor Board board is using >> pcm3168a codec connected to McASP10 serializers in parallel setup. >> >> The Infotainment board plugs into the Common Processor Board, the supp= ort >> of the extension board is extending the CPB audio support by adding >> the two codecs on the expansion board. >> >> The audio support on the Infotainment Expansion Board consists of McAS= P0 >> connected to two pcm3168a codecs with dedicated set of serializers to = each. >> The SCKI for pcm3168a is sourced from j721e AUDIO_REFCLK0 pin. >=20 > Would the audio graph card work for you on this? Unfortunately not. The CPB and IVI while using different McASP (10 for CPB, 0 for IVI) and different clock pin is used for the SCKI of the codecs on CPB and IVI, they are actually coming from the same source from within the SoC. The inter-dependency between the two audio domains are fragile and I have spent countless hours to figure out a way to masquerade the unique setup as generic. Did not worked out, it needs a custom machine driver to be able to handle the setup. - P=C3=A9ter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. 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