[v2,0/3] usb: gadget: uvc: improve uvc gadget performance

Message

Michael Grzeschik May 30, 2021, 10:30 p.m. UTC

This series improves the performance of the uvc video gadget by adding a
zero copy routine using the scatter list interface of the gadget. The
series also increases the amount of allocated requests depending of the
speed and it also reduces the interrupt load by only trigger on every
16th request in case of super-speed.

Michael Grzeschik (3):
  usb: gadget: uvc: make uvc_num_requests depend on gadget speed
  usb: gadget: uvc: add scatter gather support
  usb: gadget: uvc: decrease the interrupt load to a quarter

 drivers/usb/gadget/Kconfig              |   1 +
 drivers/usb/gadget/function/f_uvc.c     |   1 +
 drivers/usb/gadget/function/uvc.h       |  15 ++-
 drivers/usb/gadget/function/uvc_queue.c |  30 ++++-
 drivers/usb/gadget/function/uvc_queue.h |   5 +-
 drivers/usb/gadget/function/uvc_video.c | 150 +++++++++++++++++++-----
 6 files changed, 168 insertions(+), 34 deletions(-)

Comments

Greg KH June 9, 2021, 8:17 a.m. UTC | #1

<again, please fix your email headers, you didn't have anyone on To:>

On Mon, May 31, 2021 at 12:30:38AM +0200, Michael Grzeschik wrote:
> This series improves the performance of the uvc video gadget by adding a
> zero copy routine using the scatter list interface of the gadget. The
> series also increases the amount of allocated requests depending of the
> speed and it also reduces the interrupt load by only trigger on every
> 16th request in case of super-speed.
> 
> Michael Grzeschik (3):
>   usb: gadget: uvc: make uvc_num_requests depend on gadget speed
>   usb: gadget: uvc: add scatter gather support
>   usb: gadget: uvc: decrease the interrupt load to a quarter
> 
>  drivers/usb/gadget/Kconfig              |   1 +
>  drivers/usb/gadget/function/f_uvc.c     |   1 +
>  drivers/usb/gadget/function/uvc.h       |  15 ++-
>  drivers/usb/gadget/function/uvc_queue.c |  30 ++++-
>  drivers/usb/gadget/function/uvc_queue.h |   5 +-
>  drivers/usb/gadget/function/uvc_video.c | 150 +++++++++++++++++++-----
>  6 files changed, 168 insertions(+), 34 deletions(-)

Please fix up the kbuild issues before resending.

thanks,

greg k-h