From: Pierre ANTOINE <nunux@free.fr>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Pierre ANTOINE <nunux@free.fr>, linux-media@vger.kernel.org
Subject: Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
Date: Fri, 26 Apr 2013 02:03:49 +0200 [thread overview]
Message-ID: <1366934628.5179c4650033f@imp.free.fr> (raw)
In-Reply-To: <2280626.yDrB0LeJ3D@avalon>
Selon Laurent Pinchart <laurent.pinchart@ideasonboard.com>:
> Thank you. I'll update the supported devices list on the uvcvideo website.
> Could you please give me the exact model name of the camera ?
The product description is here:
http://www.amazon.fr/dp/B00A487TPC/ref=pe_205631_30430471_3p_M3_dp_1
That is: Supereyes from XCSource know on Amazon as Microscope USB Cam.
>
> Yes, that looks good. Just make sure you only hack the endpoint bandwidth for
> the webcam and not for the other USB devices.
>
I'm trying this one:
---------------------------------------
if (to_usb_device(ddev)->speed == USB_SPEED_HIGH)
{
unsigned maxp;
maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
if (maxp == 912) endpoint->desc.wMaxPacketSize =
cpu_to_le16(256);
dev_warn(ddev, "Hack 912 to 256 downsize endpoint by Nunux");
}
---------------------------------------
That seem to trigger ... but not working ... and not showing is lsusb ...
next prev parent reply other threads:[~2013-04-26 0:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 22:47 uvcvideo: Trying to lower the URB buffers on eMPIA minicam Pierre ANTOINE
2013-04-25 11:36 ` Laurent Pinchart
2013-04-25 19:13 ` Pierre ANTOINE
2013-04-25 22:55 ` Laurent Pinchart
2013-04-26 0:03 ` Pierre ANTOINE [this message]
2013-04-26 0:41 ` Laurent Pinchart
2013-04-26 0:56 ` Pierre ANTOINE
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