As Pierre suggestions:
try to enable a DSP loopback to see if the data isn't garbled by the driver amixer cset "name='pcm1_out mix 0 pcm0_in" on
But we all know that the stream path is power on automaticlly, so even I do the mixer setting, the pcm1_out wighet still is in power off state.
So is there way to do the loopback?
Now every time I do the test: aplay test.wav
I get the error message: [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe C (start=46633 end=46634)
And there're no more errors.
From the message I guess the pipe used by intel drm is blocked, so as to the pipe used by SST firmware, that's why I cannot get data from DACDAT pin.
This bug confused me for a long time, can anyone give some suggestions?
Thanks
Zhihe Tu
From: Pierre-Louis Bossart Date: 2015-11-17 09:54 To: alsa-devel@alsa-project.org; tuzhihe@pcasl.com Subject: Re: [alsa-devel] Intel Cherry Trail -- No sound in linux
On 11/16/2015 01:43 AM, ZH Tu wrote:
Hi Pierre-Louis, thanks for your reply.
Maybe I am not make myself clear.
Actually I refer some configure from baytrail platform: amixer -c0 sset 'codec_out0 mix 0 pcm0_in' on amixer -c0 sset 'media0_out mix 0 media1_in' on amixer -c0 sset 'media1_in Gain 0' 80% amixer -c0 sset 'media1_in Gain 0 Ramp Delay' 50 amixer -c0 sset 'media1_in Gain 0' off amixer -c0 sset 'pcm0_in Gain 0' 80% amixer -c0 sset 'pcm0_in Gain 0 Ramp Delay' 50 amixer -c0 sset 'pcm0_in Gain 0' off amixer -c0 sset 'codec_out0 Gain 0' 80% amixer -c0 sset 'codec_out0 Gain 0 Ramp Delay' 50 amixer -c0 sset 'codec_out0 Gain 0' off
Also there're some settings for the RT5672 codec, but I do not remember now.
it seems that the link is active with no data? Couple of suggestions:
1. try to enable a DSP loopback to see if the data isn't garbled by the driver amixer cset "name='pcm1_out mix 0 pcm0_in" on
2. try a loopback from capture to playback to see if the data sampled by the codec can be played out. amixer -c0 sset 'codec_out0 mix 0 codec_in0' on amixer -c0 sset 'codec_out0 mix 0 codec_in1' on
3. replicate all the data on codec_out1 to make sure you have data on all 4 slots
amixer -c0 sset 'codec_out1 mix 0 pcm0_in' on amixer -c0 sset 'codec_out1 Gain 0' 80% amixer -c0 sset 'codec_out1 Gain 0 Ramp Delay' 50 amixer -c0 sset 'codec_out1 Gain 0' off
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