linux-kernel - [PATCH 10/14] extcon: arizona: Also report jack state through snd_soc_jack

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Date:   Sun, 27 Dec 2020 22:12:28 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Lee Jones <lee.jones@...aro.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Hans de Goede <hdegoede@...hat.com>, patches@...nsource.cirrus.com,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 10/14] extcon: arizona: Also report jack state through snd_soc_jack_report()

The Linux Arizona driver uses the MFD framework to create several
sub-devices for the Arizona codec and then uses a driver per function.

The extcon-arizona driver handles jack-detect support and exports info
about the jack state to userspace through the standard extcon sysfs
class interface.

Standard Linux userspace does not monitor/use the extcon sysfs interface
for jack-detection, resulting in the jack-state not being taken into
account by userspace.

The ASoC machine-driver may have created a standard ASoC jack when
registering the card. In this case also report the jack-state through the
ASoC jack so that jack-detection works with standard Linux userspace.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
---
 drivers/extcon/extcon-arizona.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index d5b3231744f9..931a7d239aea 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -20,6 +20,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/extcon-provider.h>
 
+#include <sound/jack.h>
 #include <sound/soc.h>
 
 #include <linux/mfd/arizona/core.h>
@@ -598,11 +599,19 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading,
 static void arizona_set_extcon_state(struct arizona_extcon_info *info,
 				     unsigned int id, bool state)
 {
-	int ret;
+	int ret, mask = 0;
 
 	ret = extcon_set_state_sync(info->edev, id, state);
 	if (ret)
 		dev_err(info->arizona->dev, "Failed to set extcon state: %d\n", ret);
+
+	switch (id) {
+	case EXTCON_JACK_HEADPHONE:	mask = SND_JACK_HEADPHONE;	break;
+	case EXTCON_JACK_MICROPHONE:	mask = SND_JACK_MICROPHONE;	break;
+	}
+
+	if (info->arizona->jack && mask)
+		snd_soc_jack_report(info->arizona->jack, state ? mask : 0, mask);
 }
 
 static irqreturn_t arizona_hpdet_irq(int irq, void *data)
-- 
2.28.0