On Wed, 2016-11-23 at 13:22 +0800, 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 assuming the pointer is being incremented on playback ? It's sometimes helpful to disable pulseaudio and try directly with aplay. You can also try aplay -Dhw0,0 --test-position If the position is moving then it's likely the codec mixer configuration is missing something or your MCLK is missing ? The record result seems like the DSP is not capturing data. Can you try again without pulseaudio and use arecord -Dhw:0,0 --test-position. Is there anything in dmesg after plyback/capture ? > 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 > > I would highly appreciate your help! > Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
