Instead of suspending/resume the USB device at open()/close(), do it
when the device is actually used.
This way we can reduce the power consumption when a service is holding
the video device and leaving it in an idle state.
To: Mauro Carvalho Chehab <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Laurent Pinchart <[email protected]>
Cc: Tomasz Figa <[email protected]>
Cc: Alan Stern <[email protected]>
Cc: Hans Verkuil <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Max Staudt <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Cc: Yunke Cao <[email protected]>
Signed-off-by: Ricardo Ribalda <[email protected]>
---
Changes in v4:
- Remove patches to avoid crashes during device removal
- Link to v3: https://lore.kernel.org/r/[email protected]
Changes in v3:
- Rebase on top of uvc/next
- Reorder series, and put "controversial" patches at the end.
- Fix "use-before-set" bug. Thanks Max!
- Link to v2: https://lore.kernel.org/r/[email protected]
Changes in v2:
- Make access to uvc_status contitional
- Merge with Guenter race condition patchset: https://lore.kernel.org/lkml/[email protected]/
- Link to v1: https://lore.kernel.org/r/[email protected]
---
Ricardo Ribalda (2):
media: uvcvideo: Refactor streamon/streamoff
media: uvcvideo: Do power management granularly
drivers/media/usb/uvc/uvc_v4l2.c | 193 ++++++++++++++++++++++++++++++++-------
drivers/media/usb/uvc/uvcvideo.h | 1 +
2 files changed, 159 insertions(+), 35 deletions(-)
---
base-commit: 58540610e464d8b2ba46a11b81c3e6fcc4118fae
change-id: 20220920-resend-powersave-5981719ed267
Best regards,
--
Ricardo Ribalda <[email protected]>