[alsa-devel] [PATCH 1/2 v2] ASoC: nau8825: non-clock jack detection for power saving at standby

[Mark Brown]

On Mon, May 23, 2016 at 09:59:54AM +0800, John Hsu wrote:
> On 5/20/2016 7:01 PM, Mark Brown wrote:

> > I understand what it's doing but obviously a biquad filter isn't
> > specialized for this function...

> Yes, the biquad filter is general purpose feature. Could you give us
> suggestion about how to implement the biquad filter for common fea-
> ture and to fix DC offset as well?

The trouble is you'd have to do the configuration in userspace or do
something like only do the DC offset correction if no other filter is
configured.  TBH it's not unreasonable to suggest people should just
configured a high pass filter if they're having issues, though it's a
bit more work :(
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