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Wed, 29 Jan 2020 10:49:39 +0000 To: Mark Brown , Dmitry Osipenko References: <29db3df4-6f51-7c0f-1eef-90171f1d233a@codethink.co.uk> <9a5447e2-155c-7e6e-b8f1-95523c6f42c6@gmail.com> <680e2dfd-6f4f-5c96-63b7-97520961dc82@gmail.com> <0e0cd260e39ad293edb881da1c565510@codethink.co.uk> <507dcd5a-672b-61ac-aa7f-af5ff01accff@codethink.co.uk> <28cafc56-095b-68c6-638d-270608a2983f@codethink.co.uk> <3d8544be-af20-f382-85fd-32183365267b@nvidia.com> <1b3c2af4-510e-306c-749a-efffc994b20a@gmail.com> <20200128121315.GD4689@sirena.org.uk> From: Jon Hunter Message-ID: <4b90efd2-5d0c-84df-961d-80cee288e0d4@nvidia.com> Date: Wed, 29 Jan 2020 10:49:37 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200128121315.GD4689@sirena.org.uk> X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL107.nvidia.com (172.20.187.13) To HQMAIL107.nvidia.com (172.20.187.13) Content-Language: en-US DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On 28/01/2020 12:13, Mark Brown wrote: > I really don't understand why this is all taking so long, this thread > just seems to be going round in interminable circles long after it > looked like the issue was understood. I have to admit I've not read > every single message in the thread but it's difficult to see why it > doesn't seem to be making any progress. Sorry about that. On reviewing this with the audio team at NVIDIA, I was told we don't support S24_LE for I2S. The reason being that the crossbar between the DMA and I2S is not able to extract the correct 24-bits from the 32-bit sample to feed to the I2S interface. The Tegra documentation does show support for 24-bits, but not state explicit support for S24_LE. Now Ben says that he has this working, but I am unable to reproduce this, so before just dropping the S24_LE support, I would like to understand how this is working for Ben in case there is something that we have overlooked here. Jon -- nvpublic _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org https://mailman.alsa-project.org/mailman/listinfo/alsa-devel