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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-12-23 13:25:38 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-12-23 17:24:30 -0200 |
| commit | 8b2aea7878f64814544d0527c659011949d52358 (patch) | |
| tree | 92b30b2feedf8d1a6db53140b97e1042444209f4 /drivers/atm/he.c | |
| parent | a3efa1cc0e067675ffa2d2c357cbe1da0db4653b (diff) | |
[media] em28xx: prefer bulk mode on webcams
Using bulk mode allows more than one webcam, as the maximum fps
is low at 640x480 resolution. So, prefer it, if the device is
a webcam.
Tested with Silvercrest 1.3 Mpixel webcam (em2710) on both bulk and isoc
modes.
Tested analog with HVR-950 model 65201/A1C0 (em2883), where only ISOC
endpoints are available for both DVB and Analog.
Tested on Hauppauge WinTV USB 2 (em2840) on both bulk and isoc modes.
It should be noticed that enabling bulk mode by default with TV boards
is a bad idea; what happens is that, while with ISOC the USB logic will
prevent the concurrent usage of two devices that spends more than 100%
of the USB2 traffic, it doesn't care with bulk transfers.
On my tests, I started two streams, one with a WinTV at 640x480x30fps
and the other one with a Silvercrest webcam at 640x480, on a lower fps)
both on bulk mode. One of the streams always silently failed.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/atm/he.c')
0 files changed, 0 insertions, 0 deletions