From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org,
vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com,
srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com,
Bard liao <yung-chuan.liao@linux.intel.com>,
Rander Wang <rander.wang@linux.intel.com>,
Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>
Subject: [PATCH 2/4] soundwire: add enumeration_complete structure
Date: Wed, 23 Oct 2019 16:06:55 -0500 [thread overview]
Message-ID: <20191023210657.32440-3-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191023210657.32440-1-pierre-louis.bossart@linux.intel.com>
We need an async mechanism to prevent access to Slaves that are not
fully-enumerated.
init_completion() will be invoked when the Slave becomes UNATTACHED,
and complete() will be invoked when the state become ATTACHED. Any
read/write before this status change will be delayed with a
wait_for_completion().
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
include/linux/soundwire/sdw.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index a381a596212b..1381edfaa206 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -565,6 +565,7 @@ struct sdw_slave {
u16 dev_num;
bool probed;
struct completion probe_complete;
+ struct completion enumeration_complete;
};
#define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)
--
2.20.1
next prev parent reply other threads:[~2019-10-23 21:07 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-23 21:06 [PATCH 0/4] soundwire: update ASoC interfaces Pierre-Louis Bossart
2019-10-23 21:06 ` [PATCH 1/4] soundwire: sdw_slave: add new fields to track probe status Pierre-Louis Bossart
2019-11-03 4:56 ` Vinod Koul
2019-11-04 14:32 ` [alsa-devel] " Pierre-Louis Bossart
2019-11-08 4:29 ` Vinod Koul
2019-11-08 14:55 ` Pierre-Louis Bossart
2019-11-08 20:26 ` Liam Girdwood
2019-11-09 11:12 ` Vinod Koul
2019-11-11 16:34 ` Pierre-Louis Bossart
2019-11-14 11:50 ` Vinod Koul
2019-11-14 15:14 ` Pierre-Louis Bossart
2019-10-23 21:06 ` Pierre-Louis Bossart [this message]
2019-11-03 5:22 ` [PATCH 2/4] soundwire: add enumeration_complete structure Vinod Koul
2019-11-04 14:32 ` [alsa-devel] " Pierre-Louis Bossart
2019-10-23 21:06 ` [PATCH 3/4] soundwire: intel: update interfaces between ASoC and SoundWire Pierre-Louis Bossart
2019-10-23 21:06 ` [PATCH 4/4] soundwire: intel: update stream callbacks for hwparams/free stream operations Pierre-Louis Bossart
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