How to enable 'remote wakeup' in video minidriver?

NTDEV
1

Dear all,

I have a video capture device support remote wakeup. I need develop driver
to support this function. But I don’t find the interface that the stream
class driver and USBCAMD lib provide to minidriver to support remote
wakeup. How could I do?

Any advice is helpful.
Thanks!

Best Regards,

Dengwen

2

xxxxx@sunplus.com.cn wrote:

I have a video capture device support remote wakeup. I need develop
driver to support this function. But I don’t find the interface that
the stream class driver and USBCAMD lib provide to minidriver to
support remote wakeup. How could I do?

I’m not convinced that the driver has to be involved at all in remote
wakeup. If your device descriptor power attribute field has the “remote
wakeup” bit set, I believe it is up to the hub and host controller to Do
The Right Thing.

What is the usefulness of having a video capture device support remote
wakeup?

–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.

3

The remote wakeup bit is only the first step. The power policy owner for
the device itself (which is not the hub) must send a wait wake request
to the PDO so that the device is actually enabled to wake up the machine
(vs just reporting that it is capable of waking the machine).

d

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Tim Roberts
Sent: Wednesday, October 19, 2005 9:05 AM
To: Windows System Software Devs Interest List
Subject: Re: [ntdev] How to enable ‘remote wakeup’ in video minidriver?

xxxxx@sunplus.com.cn wrote:

I have a video capture device support remote wakeup. I need develop
driver to support this function. But I don’t find the interface that
the stream class driver and USBCAMD lib provide to minidriver to
support remote wakeup. How could I do?

I’m not convinced that the driver has to be involved at all in remote
wakeup. If your device descriptor power attribute field has the "remote

wakeup" bit set, I believe it is up to the hub and host controller to Do

The Right Thing.

What is the usefulness of having a video capture device support remote
wakeup?

–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.

Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256

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