linux-kernel - [PATCH 3/5] ASoC: ts3a227e: Map BTN_0 to KEY

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Date:   Wed, 22 Nov 2017 12:56:41 -0800
From:   Benson Leung <bleung@...omium.org>
To:     broonie@...nel.org, linux-kernel@...r.kernel.org
Cc:     harshapriya.n@...el.com, naveen.m@...el.com,
        srinivas.kandagatla@...aro.org, cychiang@...omium.org,
        dgreid@...omium.org, anatol.pomozov@...il.com, bleung@...omium.org,
        bleung@...gle.com
Subject: [PATCH 3/5] ASoC: ts3a227e: Map BTN_0 to KEY_PLAYPAUSE

The Android 3.5mm Headset jack specification mentions that BTN_0 should
be mapped to KEY_MEDIA, but this is less logical than KEY_PLAYPAUSE,
which has much broader userspace support.

For example, the Chrome OS userspace now supports KEY_PLAYPAUSE to toggle
play/pause of videos and audio, but does not handle KEY_MEDIA.

Furthermore, Android itself now supports KEY_PLAYPAUSE equivalently, as the
new USB headset spec requires KEY_PLAYPAUSE for BTN_0.
https://source.android.com/devices/accessories/headset/usb-headset-spec

Signed-off-by: Benson Leung <bleung@...omium.org>
---
 sound/soc/codecs/ts3a227e.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/ts3a227e.c b/sound/soc/codecs/ts3a227e.c
index 738e04b09116..1271e7e1fc78 100644
--- a/sound/soc/codecs/ts3a227e.c
+++ b/sound/soc/codecs/ts3a227e.c
@@ -241,7 +241,7 @@ int ts3a227e_enable_jack_detect(struct snd_soc_component *component,
 {
 	struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component);
 
-	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_MEDIA);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
-- 
2.15.0.448.gf294e3d99a-goog