Messages in this thread | | | Date | Tue, 1 Oct 2019 10:45:13 -0400 | From | Sasha Levin <> | Subject | Re: [PATCH AUTOSEL 5.3 087/203] ASoC: mediatek: mt6358: add delay after dmic clock on |
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On Mon, Sep 23, 2019 at 11:21:59AM -0700, Mark Brown wrote: >On Sun, Sep 22, 2019 at 02:41:53PM -0400, Sasha Levin wrote: >> From: Jiaxin Yu <jiaxin.yu@mediatek.com> >> >> [ Upstream commit ccb1fa21ef58a2ac15519bb878470762e967e8b3 ] >> >> Most dmics produce a high level when they receive clock. The difference >> between power-on and memory record time is about 10ms, but the dmic >> needs 50ms to output normal data. >> >> This commit add 100ms delay after SoC output clock so that we can cut >> off the pop noise at the beginning. > >This might mess up a production system, please don't backport it. >In general delays to eliminate pops and clicks that are part of >the PCM statup path (as opposed to DAPM) are not safe to >backport.
Okay, I'll drop it, thanks.
-- Thanks, Sasha
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