linux-kernel - [PATCH 5.3 027/135] ASoC: rockchip: rockchip_max98090: Enable SHDN to fix headset detection

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Message-Id: <20191203213011.147408629@linuxfoundation.org>
Date:   Tue,  3 Dec 2019 23:34:27 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Cheng-Yi Chiang <cychiang@...omium.org>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.3 027/135] ASoC: rockchip: rockchip_max98090: Enable SHDN to fix headset detection

From: Cheng-Yi Chiang <cychiang@...omium.org>

[ Upstream commit 07c1b73e2a027ea9a52677beeb6a943a3e357139 ]

max98090 spec states that chip needs to be in turned-on state to supply
mic bias. Enable SHDN dapm widget along with MICBIAS widget to
actually turn on mic bias for proper headset button detection.
This is similar to cht_ti_jack_event in
sound/soc/intel/boards/cht_bsw_max98090_ti.c.

Note that due to ts3a227e reports the jack event right away before the
notifier is registered, if headset is plugged on boot, headset button
will not get detected until headset is unplugged and plugged. This is
still an issue to be fixed.

Signed-off-by: Cheng-Yi Chiang <cychiang@...omium.org>
Link: https://lore.kernel.org/r/20191028095229.99438-1-cychiang@chromium.org
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/rockchip/rockchip_max98090.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sound/soc/rockchip/rockchip_max98090.c b/sound/soc/rockchip/rockchip_max98090.c
index 782e534d4c0dd..f2add1fe2e79d 100644
--- a/sound/soc/rockchip/rockchip_max98090.c
+++ b/sound/soc/rockchip/rockchip_max98090.c
@@ -67,10 +67,13 @@ static int rk_jack_event(struct notifier_block *nb, unsigned long event,
 	struct snd_soc_jack *jack = (struct snd_soc_jack *)data;
 	struct snd_soc_dapm_context *dapm = &jack->card->dapm;
 
-	if (event & SND_JACK_MICROPHONE)
+	if (event & SND_JACK_MICROPHONE) {
 		snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
-	else
+		snd_soc_dapm_force_enable_pin(dapm, "SHDN");
+	} else {
 		snd_soc_dapm_disable_pin(dapm, "MICBIAS");
+		snd_soc_dapm_disable_pin(dapm, "SHDN");
+	}
 
 	snd_soc_dapm_sync(dapm);
 
-- 
2.20.1