So UVC devices can remain runtime-suspended when the system goes into a
sleep state, they and all of their descendant devices need to have
runtime PM enable.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
---
drivers/media/usb/uvc/uvc_driver.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index cf27006..687e5fb 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1855,6 +1855,15 @@ static int uvc_register_chains(struct uvc_device *dev)
return 0;
}
+static int uvc_pm_runtime_enable(struct device *dev, void *data)
+{
+ pm_runtime_enable(dev);
+
+ device_for_each_child(dev, NULL, uvc_pm_runtime_enable);
+
+ return 0;
+}
+
/* ------------------------------------------------------------------------
* USB probe, disconnect, suspend and resume
*/
@@ -1959,6 +1968,8 @@ static int uvc_probe(struct usb_interface *intf,
"supported.\n", ret);
}
+ device_for_each_child(&dev->intf->dev, NULL, uvc_pm_runtime_enable);
+
uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
usb_enable_autosuspend(udev);
return 0;
--
2.3.4
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