From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pierre-Louis Bossart Subject: Re: ASoC: Intel: Enabling LPE audio over I2S on Intel Atom E3815 Date: Sun, 27 Nov 2016 12:02:21 -0600 Message-ID: <1774ba95-807b-c85f-6505-7b7ed7eeb52a@linux.intel.com> References: <1479878542.5675.7.camel@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by alsa0.perex.cz (Postfix) with ESMTP id A70AC266801 for ; Sun, 27 Nov 2016 19:02:23 +0100 (CET) In-Reply-To: <1479878542.5675.7.camel@canonical.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: Shrirang Bagul , "alsa-devel@alsa-project.org" List-Id: alsa-devel@alsa-project.org On 11/22/16 11:22 PM, Shrirang Bagul wrote: > Hi, > > I'm attempting to enable audio on Intel Atom E3815. I have a board with RT5660 > codec from Realtek connected to the SoC over I2S2. The codec can be configured > over I2C bus. The board supports External Mic In and Line Out connections for > audio. > > I am running Ubuntu 16.04 LTS with kernel v4.4. > > To support RT5660 codec, I have backported patches - > d01580c ASoC: rt5660: enable MCLK detection > 2b26dd4 ASoC: rt5660: add rt5660 codec driver > from https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git > topic/rt5660 branch > > To support I2S_CLK using MCLK I've also backported the patch to support PMC > platform clocks - > [13/17] clk: x86: Add Atom PMC platform clocks (https://patchwork.kernel.org/pat > ch/9277989/) > > To understand the I2S over LPE architecture for audio I'm referring to the Intel > Atom Processor E3800: Datasheet (http://www.intel.com/content/dam/www/public/us/ > en/documents/datasheets/atom-e3800-family-datasheet.pdf) and discussions on > alsa-devel mailing list thread: http://mailman.alsa-project.org/pipermail/alsa-d > evel/2015-November/100303.html > > After implementing the machine driver byt-rt5660.c (by referring to byt- > rt5640.c), the CPU DAI baytrail-pcm-audio is registered successfully and the > fw_sst_0f28.bin-48kHz_i2s_master firmware also is loaded without any errors. It > is possible to configure the codec controls using alsamixer. > > However, an attempt to record results in an empty PCM file and no audio is heard > if I try to playback using aplay. > > I'm clueless on how to proceed from this point onward in getting the audio to > work on this board. The ouput of alsa-info.sh, clk_summary & gpio config from > debugfs and dmesg log is attached with this message. I have published the source > code here: http://kernel.ubuntu.com/git/snb/ubuntu-xenial.git/log/?h=x-master-au > dio-test You are mixing different drivers here. if you started from byt-rt5640.c then you started from a legacy driver that no one uses any longer in any products and which does not enable the 19.2 MHz MCLK which is easier to use. You should start from bytcr_rt5640 which does handle the MCLK and is more robust against BIOS issues.