mirror of https://gitee.com/openkylin/linux.git
8b2aea7878
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> |
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| .. | ||
| au0828 | ||
| b2c2 | ||
| cpia2 | ||
| cx231xx | ||
| dvb-usb | ||
| dvb-usb-v2 | ||
| em28xx | ||
| gspca | ||
| hdpvr | ||
| pvrusb2 | ||
| pwc | ||
| s2255 | ||
| siano | ||
| sn9c102 | ||
| stk1160 | ||
| stkwebcam | ||
| tlg2300 | ||
| tm6000 | ||
| ttusb-budget | ||
| ttusb-dec | ||
| usbvision | ||
| uvc | ||
| zr364xx | ||
| Kconfig | ||
| Makefile | ||