mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-22 02:17:36 -04:00
Code Issues Packages Projects Releases Wiki Activity

media: Documentation: Use right function to test device power state

Browse Source 
Tell driver authors to use pm_runtime_get_if_active() instead of
pm_runtime_get_if_in_use() to check the device's power state in the s_ctrl
callback. pm_runtime_get_if_active() is the right function to use here
since it returns non-zero if the device is powered on rather than its
PM runtime usage_count is non-zero.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Sakari Ailus
2026-03-26 12:42:49 +02:00
parent 0b42657bea
commit d9f8489c43
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/driver-api/media/camera-sensor.rst
View File

@@ -114,7 +114,7 @@ of the device. This is because the power state of the device is only changed
after the power state transition has taken place. The ``s_ctrl`` callback can be
used to obtain device's power state after the power state transition:
.. c:function:: int pm_runtime_get_if_in_use(struct device *dev);
.. c:function:: int pm_runtime_get_if_active(struct device *dev);
The function returns a non-zero value if it succeeded getting the power count or
runtime PM was disabled, in either of which cases the driver may proceed to