Hi Ricardo,
Thank you for the patch.
And here the subject line should mention uvc_endpoint_max_bpi() :-)
While at it, I'll replace "uvc" with "uvcvideo".
On Fri, Apr 01, 2022 at 07:24:37PM +0200, Ricardo Ribalda wrote:
> Replace manual decoding of psize in uvc_parse_streaming(), with the code
> from uvc_endpoint_max_bpi(). It also handles usb3 devices.
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> ---
> drivers/media/usb/uvc/uvc_driver.c | 4 +---
> drivers/media/usb/uvc/uvc_video.c | 3 +--
> drivers/media/usb/uvc/uvcvideo.h | 1 +
> 3 files changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index dda0f0aa78b8..977566aa2c89 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -1009,9 +1009,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
> streaming->header.bEndpointAddress);
> if (ep == NULL)
> continue;
> -
> - psize = le16_to_cpu(ep->desc.wMaxPacketSize);
> - psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
> + psize = uvc_endpoint_max_bpi(dev->udev, ep);
> if (psize > streaming->maxpsize)
> streaming->maxpsize = psize;
> }
> diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
> index a2dcfeaaac1b..9dc0a5dba158 100644
> --- a/drivers/media/usb/uvc/uvc_video.c
> +++ b/drivers/media/usb/uvc/uvc_video.c
> @@ -1756,8 +1756,7 @@ static void uvc_video_stop_transfer(struct uvc_streaming *stream,
> /*
> * Compute the maximum number of bytes per interval for an endpoint.
> */
> -static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
> - struct usb_host_endpoint *ep)
> +u16 uvc_endpoint_max_bpi(struct usb_device *dev, struct usb_host_endpoint *ep)
> {
> u16 psize;
>
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index 143230b3275b..28eb337a6cfb 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -911,6 +911,7 @@ void uvc_simplify_fraction(u32 *numerator, u32 *denominator,
> u32 uvc_fraction_to_interval(u32 numerator, u32 denominator);
> struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
> u8 epaddr);
> +u16 uvc_endpoint_max_bpi(struct usb_device *dev, struct usb_host_endpoint *ep);
>
> /* Quirks support */
> void uvc_video_decode_isight(struct uvc_urb *uvc_urb,
--
Regards,
Laurent Pinchart
