[v1] media: uvcvideo: Implement granular power management

[PATCH v1 0/3] [RESEND] media: uvcvideo: Implement granular power management

Ricardo Ribalda posted 3 patches 3 years, 6 months ago

Diff against v2 v3 v4 v5
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drivers/media/usb/uvc/uvc_status.c |  23 +++++
drivers/media/usb/uvc/uvc_v4l2.c   | 193 ++++++++++++++++++++++++++++++-------
drivers/media/usb/uvc/uvcvideo.h   |   1 +
3 files changed, 182 insertions(+), 35 deletions(-)

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[PATCH v1 0/3] [RESEND] media: uvcvideo: Implement granular power management

Posted by Ricardo Ribalda 3 years, 6 months ago

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 <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>

---
Ricardo Ribalda (3):
      media: uvcvideo: Only create input devs if hw supports it
      media: uvcvideo: Refactor streamon/streamoff
      media: uvcvideo: Do power management granularly

 drivers/media/usb/uvc/uvc_status.c |  23 +++++
 drivers/media/usb/uvc/uvc_v4l2.c   | 193 ++++++++++++++++++++++++++++++-------
 drivers/media/usb/uvc/uvcvideo.h   |   1 +
 3 files changed, 182 insertions(+), 35 deletions(-)
---
base-commit: 521a547ced6477c54b4b0cc206000406c221b4d6
change-id: 20220920-resend-powersave-5981719ed267

Best regards,
-- 
Ricardo Ribalda <ribalda@chromium.org>