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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Michael Grzeschik <m.grzeschik@pengutronix.de>
Cc: linux-usb@vger.kernel.org, balbi@kernel.org,
	kernel@pengutronix.de, Paul Elder <paul.elder@ideasonboard.com>,
	Caleb Connolly <caleb.connolly@ideasonboard.com>
Subject: Re: [PATCH 0/3] usb: gadget: uvc: improve uvc gadget performance
Date: Thu, 22 Apr 2021 00:59:51 +0300	[thread overview]
Message-ID: <YICgV1bnCWWWXa4n@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20210421211513.29002-1-m.grzeschik@pengutronix.de>

CC'ing Paul and Caleb.

I'm afraid I have no bandwidth to review UVC gadget patches at the
moment.

On Wed, Apr 21, 2021 at 11:15:10PM +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 | 145 +++++++++++++++++++-----
>  6 files changed, 164 insertions(+), 33 deletions(-)

-- 
Regards,

Laurent Pinchart

      parent reply	other threads:[~2021-04-21 22:00 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21 21:15 [PATCH 0/3] usb: gadget: uvc: improve uvc gadget performance Michael Grzeschik
2021-04-21 21:15 ` [PATCH 1/3] usb: gadget: uvc: make uvc_num_requests depend on gadget speed Michael Grzeschik
2021-04-21 21:15 ` [PATCH 2/3] usb: gadget: uvc: add scatter gather support Michael Grzeschik
2021-04-22  4:07   ` kernel test robot
2021-04-22  4:07     ` kernel test robot
2021-04-21 21:15 ` [PATCH 3/3] usb: gadget: uvc: decrease the interrupt load to a quarter Michael Grzeschik
2021-04-21 21:59 ` Laurent Pinchart [this message]

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