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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	tiwai@suse.de, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	vkoul@kernel.org, broonie@kernel.org,
	srinivas.kandagatla@linaro.org, jank@cadence.com,
	slawomir.blauciak@intel.com,
	Sanyog Kale <sanyog.r.kale@intel.com>,
	Bard liao <yung-chuan.liao@linux.intel.com>,
	Rander Wang <rander.wang@linux.intel.com>
Subject: [alsa-devel] [PATCH v2 3/5] soundwire: add initialization_complete definition
Date: Wed,  6 Nov 2019 13:00:32 -0600
Message-ID: <20191106190034.4619-4-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191106190034.4619-1-pierre-louis.bossart@linux.intel.com>

This helper is useful to make sure that the resume stages wait for the
device to be fully initialized, not just enumerated.

Depending on how initialization is handled, a Slave device driver may
wait for enumeration_complete, or for initialization_complete, both
are valid synchronization points.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 include/linux/soundwire/sdw.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 2c6688eb4c09..6d667224ae8f 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -552,6 +552,8 @@ struct sdw_slave_ops {
  * @enumeration_complete: completion utility to control potential races
  * on startup between device enumeration and read/write access to the
  * Slave device
+ * @initialization_complete: completion utility to control potential races
+ * on startup between device enumeration and settings being restored
  */
 struct sdw_slave {
 	struct sdw_slave_id id;
@@ -569,6 +571,7 @@ struct sdw_slave {
 	bool probed;
 	struct completion probe_complete;
 	struct completion enumeration_complete;
+	struct completion initialization_complete;
 };
 
 #define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)
-- 
2.20.1

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  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-06 19:00 [alsa-devel] [PATCH v2 0/5] soundwire: update ASoC interfaces Pierre-Louis Bossart
2019-11-06 19:00 ` [alsa-devel] [PATCH v2 1/5] soundwire: sdw_slave: add new fields to track probe status Pierre-Louis Bossart
2019-11-06 19:00 ` [alsa-devel] [PATCH v2 2/5] soundwire: add enumeration_complete structure Pierre-Louis Bossart
2019-11-06 19:00 ` Pierre-Louis Bossart [this message]
2019-11-06 19:00 ` [alsa-devel] [PATCH v2 4/5] soundwire: intel: update interfaces between ASoC and SoundWire Pierre-Louis Bossart
2019-11-06 19:00 ` [alsa-devel] [PATCH v2 5/5] soundwire: intel: update stream callbacks for hwparams/free stream operations Pierre-Louis Bossart

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