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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220920-resend-powersave-v1-0-123aa2ba3836@chromium.org>
Date:   Tue, 20 Sep 2022 16:09:49 +0200
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Tomasz Figa <tfiga@...omium.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Ricardo Ribalda <ribalda@...omium.org>,
        linux-media@...r.kernel.org
Subject: [PATCH v1 0/3] [RESEND] media: uvcvideo: Implement granular power management

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@...nel.org>
Cc: linux-media@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Tomasz Figa <tfiga@...omium.org>
Signed-off-by: Ricardo Ribalda <ribalda@...omium.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@...omium.org>