linux-kernel - Re: [alsa-devel] [PATCH v1 5/6] ASoC: codecs: msm8916-wcd-analog: add MBHC support

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Message-ID: <20170726193530.wkv5awgeupbrrsxp@workotop.localdomain>
Date:   Wed, 26 Jul 2017 15:35:30 -0400
From:   Damien Riegel <damien.riegel@...oirfairelinux.com>
To:     Srinivas Kandagatla 
        <srinivas.kandagatlaatlinaro.org@...kotop.localdomain>
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH v1 5/6] ASoC: codecs: msm8916-wcd-analog:
 add MBHC support

[Sorry for breaking the thread, but I don't have the initial message to
reply to.]

I tried your patchset and faced some issues regarding removal detection:
the driver detects headphone and microphone removal as soon as I press a
button on the headset.

evtest logs:

	[Headset insertion]
Event: time 10207.841157, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 1
Event: time 10207.841157, -------------- SYN_REPORT ------------
Event: time 10208.039105, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 0
Event: time 10208.039105, -------------- SYN_REPORT ------------
Event: time 10208.075519, type 5 (EV_SW), code 2 (SW_HEADPHONE_INSERT), value 1
Event: time 10208.075519, type 5 (EV_SW), code 4 (SW_MICROPHONE_INSERT), value 1
Event: time 10208.075519, -------------- SYN_REPORT ------------
	[Pressing Volume up Button]
Event: time 10210.590403, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 1
Event: time 10210.590403, type 5 (EV_SW), code 2 (SW_HEADPHONE_INSERT), value 0
Event: time 10210.590403, type 5 (EV_SW), code 4 (SW_MICROPHONE_INSERT), value 0
Event: time 10210.590403, -------------- SYN_REPORT ------------
Event: time 10210.719560, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 0
Event: time 10210.719560, -------------- SYN_REPORT ------------
	[Unplugging]
Event: time 10221.926156, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 1
Event: time 10221.926156, -------------- SYN_REPORT ------------
Event: time 10222.026466, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 0
Event: time 10222.026466, -------------- SYN_REPORT ------------


Also, the KEY_MEDIA is wrongly reported but I don't see that every time,
I think it depends on how fast I plug in the headset. Anyway, I think
that can easily be filtered out by testing the presence of the
microphone.


Regards,
-- 
Damien