linux-kernel - [PATCH 01/14] mfd: arizona: Add jack pointer to struct arizona

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Date:   Sun, 27 Dec 2020 22:12:19 +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 01/14] mfd: arizona: Add jack pointer to struct arizona

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 jack-detect support for the Arizona codec is handled by the
extcon-arizona driver. This driver exports info about the jack state
to userspace through the standard extcon sysfs class interface.

But standard Linux userspace does not monitor/use the extcon sysfs
interface for jack-detection.

Add a jack pointer to the shared arizona data struct, this allows
the ASoC machine driver to create a snd_soc_jack and then pass this
to the extcon-arizona driver to report jack-detect state, so that
jack-detection works with standard Linux userspace.

The extcon-arizona code already depends on (waits for with -EPROBE_DEFER)
the snd_card being registered by the machine driver, so this does not
cause any ordering issues.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
---
 include/linux/mfd/arizona/core.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h
index 6d6f96b2b29f..5eb269bdbfcb 100644
--- a/include/linux/mfd/arizona/core.h
+++ b/include/linux/mfd/arizona/core.h
@@ -115,6 +115,7 @@ enum arizona_type {
 #define ARIZONA_NUM_IRQ                   75

 struct snd_soc_dapm_context;
+struct snd_soc_jack;

 struct arizona {
 	struct regmap *regmap;
@@ -148,6 +149,7 @@ struct arizona {
 	bool ctrlif_error;

 	struct snd_soc_dapm_context *dapm;
+	struct snd_soc_jack *jack;

 	int tdm_width[ARIZONA_MAX_AIF];
 	int tdm_slots[ARIZONA_MAX_AIF];
-- 
2.28.0