linux-kernel - [PATCH 4/4] Revert "usb: gadget: f_uvc: change endpoint allocation in uvc_function

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Message-Id: <20231221165426.1590866-5-Frank.Li@nxp.com>
Date: Thu, 21 Dec 2023 11:54:26 -0500
From: Frank Li <Frank.Li@....com>
To: peter.chen@...nel.org,
	cugyly@....com
Cc: Frank.Li@....com,
	a-govindraju@...com,
	gregkh@...uxfoundation.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org,
	pawell@...ence.com,
	rogerq@...nel.org
Subject: [PATCH 4/4] Revert "usb: gadget: f_uvc: change endpoint allocation in uvc_function_bind()"

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.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/usb/gadget/function/f_uvc.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index faa398109431f..cc4e08c8169b4 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -719,13 +719,21 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 	}
 	uvc->enable_interrupt_ep = opts->enable_interrupt_ep;
 
-	ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
+	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;
 
-- 
2.34.1