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Message-Id: <20200726215945.3119-1-yung-chuan.liao@linux.intel.com>
Date: Mon, 27 Jul 2020 05:59:45 +0800
From: Bard Liao <yung-chuan.liao@...ux.intel.com>
To: alsa-devel@...a-project.org, vkoul@...nel.org
Cc: vinod.koul@...aro.org, linux-kernel@...r.kernel.org, tiwai@...e.de,
broonie@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
srinivas.kandagatla@...aro.org, rander.wang@...ux.intel.com,
ranjani.sridharan@...ux.intel.com, hui.wang@...onical.com,
pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
mengdong.lin@...el.com, bard.liao@...el.com
Subject: [PATCH v2] soundwire: master: enable pm runtime
The hierarchy of soundwire devices is platform device -> M device -> S
device. A S device is physically attached on the platform device. So the
platform device should be resumed when a S device is resumed. As the
bridge of platform device and S device, we have to implement runtime pm
on M driver. We have set runtime pm ops in M driver already, but still
need to enable runtime pm.
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
Changes in v2:
- Edit the commit message to explain why we need the patch.
---
drivers/soundwire/master.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/soundwire/master.c b/drivers/soundwire/master.c
index 5f0b2189defe..3488bb824e84 100644
--- a/drivers/soundwire/master.c
+++ b/drivers/soundwire/master.c
@@ -154,6 +154,7 @@ int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
bus->dev = &md->dev;
bus->md = md;
+ pm_runtime_enable(&bus->md->dev);
device_register_err:
return ret;
}
@@ -166,6 +167,7 @@ int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
*/
int sdw_master_device_del(struct sdw_bus *bus)
{
+ pm_runtime_disable(&bus->md->dev);
device_unregister(bus->dev);
return 0;
--
2.17.1
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