6.6-stable review patch. If anyone has any objections, please let me know.
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From: Frank Li Frank.Li@nxp.com
commit 895ee5aefb7e24203de5dffae7ce9a02d78fa3d1 upstream.
This reverts commit 3c5b006f3ee800b4bd9ed37b3a8f271b8560126e.
gadget_is_{super|dual}speed() API check UDC controller capitblity. It should pass down highest speed endpoint descriptor to UDC controller. So UDC controller driver can reserve enough resource at check_config(), especially mult and maxburst. So UDC driver (such as cdns3) can know need at least (mult + 1) * (maxburst + 1) * wMaxPacketSize internal memory for this uvc functions.
Cc: stable@vger.kernel.org Signed-off-by: Frank Li Frank.Li@nxp.com Link: https://lore.kernel.org/r/20231224153816.1664687-5-Frank.Li@nxp.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/function/f_uvc.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)
--- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -719,13 +719,29 @@ uvc_function_bind(struct usb_configurati } uvc->enable_interrupt_ep = opts->enable_interrupt_ep;
- ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep); + /* + * gadget_is_{super|dual}speed() API check UDC controller capitblity. It should pass down + * highest speed endpoint descriptor to UDC controller. So UDC controller driver can reserve + * enough resource at check_config(), especially mult and maxburst. So UDC driver (such as + * cdns3) can know need at least (mult + 1) * (maxburst + 1) * wMaxPacketSize internal + * memory for this uvc functions. This is the only straightforward method to resolve the UDC + * resource allocation issue in the current gadget framework. + */ + if (gadget_is_superspeed(c->cdev->gadget)) + ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep, + &uvc_ss_streaming_comp); + else if (gadget_is_dualspeed(cdev->gadget)) + ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep); + else + ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep); + if (!ep) { uvcg_info(f, "Unable to allocate streaming EP\n"); goto error; } uvc->video.ep = ep;
+ uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address; uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address; uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;