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scratching noise when pause/release HDMI audio on Yorp #583
Description
This noise issue is happened when pause/release HDMI playback, the possibility is less than 5% and there's no obvious error trace.
The recorded wav file is attached.
BTW, I tried to reproduce this issue with sine wav, but failed.
noise.zip
Kernel-topic/cros-sof-v4.14-rebase: a38231
DSP FW-origin/glk-004-drop-stable: 1f79920
Topology-origin/master: 5894ed
Activity
lgirdwood commentedon Nov 15, 2018
@keqiaozhang is this easy to reproduce with your orig wav file and cannot be reproduces with sine wave ? Please check sine wave more (and check with audacity) as this would possibly indicate an issue with gain ? rather than DMA. I assume there is also no such issue with SSP and HDMI is using passthrough pipeline ?
slawblauciak commentedon Nov 16, 2018
I noticed a couple rather interesting peculiarities with this.
For once, often times on pause, soon before this bug manifests itself I can hear a very short audible burst of this metallic noise.
Secondly, very often the bug doesn't show up immediately after releasing, but after some time, like half a second or so. It also sometimes goes away after a second too.
I maintain a very low reproduction rate, around 1%.
The issue is reproducible for me with an 800 Hz sine wave.
keqiaozhang commentedon Nov 27, 2018
@slawblauciak
I got the same result as you. The noise happens only when pausing or releasing the playback and goes away after <1 second and the possibility is low, less than 5%.
Before the noise will last until next pause/release.
Tested with
kernel-cros-sof-v4.14-rebase: f8f388ef
sof-master: 443233
tplg-master: ad3f3e4
lgirdwood commentedon Nov 29, 2018
@keqiaozhang can you provide some audacity screens shots and wav of the noise. Thamks
keqiaozhang commentedon Nov 30, 2018
@lgirdwood
I tested a lot with 48K sine wave, but failed to reproduce it.
@slawblauciak
Could you help to provide the audacity screens shots? I cannot play 800 sine wave without the plug plugin on Yorp.
slawblauciak commentedon Nov 30, 2018
@keqiaozhang you shouldn't need the plug if the sampling rate is 48 kHz. Just the sinewave should be at 800 Hz
I will try to provide you with a screenshot
keqiaozhang commentedon Nov 30, 2018
Thanks @slawblauciak. I misunderstood, I just generated a 48K_16bit_2ch_800hz sine wav. I will try it again.
mengdonglin commentedon Dec 25, 2018
The issue can still be reproduced occasionally with
#567
#575
michalgrodzicki commentedon Mar 26, 2019
@mengdonglin what is a current status here?
mengdonglin commentedon Mar 29, 2019
@keqiaozhang please help to check latest status with https://github.com/thesofproject/sof/tree/glk-011-drop-stable branch
keqiaozhang commentedon Mar 29, 2019
@mengdonglin
I didn't observe this issue in regular test. but I still need to run the stress test to double confirm it. will update it soon
Jiangxinx commentedon Mar 29, 2019
Not reproduce on APL-UP2-PCM521X platform.
Env:
sof master: 742f83b
kernel sof-dev: e29122d
tplg: sof-apl-pcm512x.tplg
lgirdwood commentedon Mar 29, 2019
@Jiangxinx @keqiaozhang can we close ?
keqiaozhang commentedon Apr 1, 2019
This issue cannot be reproduced on GLK. We can close this issue now.
SOF/tplg: glk-011-drop-stable / 55ae67b
Kernel driver: cros-sof-v4.14-rebase/a1d6bf0d