From patchwork Thu Feb 17 03:10:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Leng <3090101217@zju.edu.cn> X-Patchwork-Id: 544058 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4A79C433EF for ; Thu, 17 Feb 2022 03:11:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232392AbiBQDLO (ORCPT ); Wed, 16 Feb 2022 22:11:14 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:39640 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231329AbiBQDLO (ORCPT ); Wed, 16 Feb 2022 22:11:14 -0500 Received: from zg8tmty1ljiyny4xntqumjca.icoremail.net (zg8tmty1ljiyny4xntqumjca.icoremail.net [165.227.154.27]) by lindbergh.monkeyblade.net (Postfix) with SMTP id 35AAE23D5D9; Wed, 16 Feb 2022 19:10:58 -0800 (PST) Received: from jleng.ambarella.net (unknown [180.169.129.130]) by mail-app2 (Coremail) with SMTP id by_KCgBHTISsvA1itbXyAQ--.43101S2; Thu, 17 Feb 2022 11:10:42 +0800 (CST) From: 3090101217@zju.edu.cn To: gregkh@linuxfoundation.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Jing Leng Subject: [PATCH v3] usb: gadget: f_uvc: add superspeed plus transfer support Date: Thu, 17 Feb 2022 11:10:35 +0800 Message-Id: <20220217031035.6150-1-3090101217@zju.edu.cn> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: X-CM-TRANSID: by_KCgBHTISsvA1itbXyAQ--.43101S2 X-Coremail-Antispam: 1UD129KBjvJXoWxGFyftw4DZw17ZF45GFyUJrb_yoW5Xw4Upa 15A3Z5Ary5JFn5J34UJan5Cry3XF4SvayDKFZFq3yY9rW3tas5Ar9Fyr1rKa47XFsxZr40 yFnrA3yIkw10krJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBSb7Iv0xC_Cr1lb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I 8E87Iv6xkF7I0E14v26rxl6s0DM2vYz4IE04k24VAvwVAKI4IrM2vYz4IE4I80cI0F6IAv xc0EwIxC4wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ew Av7VC0I7IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY 6r1j6r4UM4x0Y48IcxkI7VAKI48JM4kE6xkIj40Ew7xC0wCY02Avz4vE14v_Gr4l42xK82 IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC2 0s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMI IF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF 0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87 Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxUxeHqDUUUU X-CM-SenderInfo: qtqziiyqrsilo62m3hxhgxhubq/1tbiAwIEBVNG3FjlrQABsY Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Jing Leng UVC driver doesn't set ssp_descriptors in struct usb_function, it doesn't support USB_SPEED_SUPER_PLUS transfer. So we can refer to USB_SPEED_SUPER to realize the support of USB_SPEED_SUPER_PLUS. If users use a USB device controller that speed can be up to USB_SPEED_SUPER_PLUS (10 Gbps), downgrading to USB_SPEED_SUPER (5 Gbps) is not a good performance. In addition, it triggers a warning "configfs-gadget gadget: uvc doesn't hold the descriptors for current speed". Signed-off-by: Jing Leng --- ChangeLog v2->v3: - Modify the title and description of the PATCH - It is a feature but not a bug ChangeLog v1->v2: - Update more detailed description of the PATCH --- drivers/usb/gadget/function/f_uvc.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 71bb5e477dba..8fc9b035481e 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -478,6 +478,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed) void *mem; switch (speed) { + case USB_SPEED_SUPER_PLUS: case USB_SPEED_SUPER: uvc_control_desc = uvc->desc.ss_control; uvc_streaming_cls = uvc->desc.ss_streaming; @@ -521,7 +522,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed) + uvc_control_ep.bLength + uvc_control_cs_ep.bLength + uvc_streaming_intf_alt0.bLength; - if (speed == USB_SPEED_SUPER) { + if (speed == USB_SPEED_SUPER || speed == USB_SPEED_SUPER_PLUS) { bytes += uvc_ss_control_comp.bLength; n_desc = 6; } else { @@ -565,7 +566,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed) uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf; UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep); - if (speed == USB_SPEED_SUPER) + if (speed == USB_SPEED_SUPER || speed == USB_SPEED_SUPER_PLUS) UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp); UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep); @@ -727,6 +728,15 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f) } } + if (gadget_is_superspeed_plus(c->cdev->gadget)) { + f->ssp_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER_PLUS); + if (IS_ERR(f->ssp_descriptors)) { + ret = PTR_ERR(f->ssp_descriptors); + f->ssp_descriptors = NULL; + goto error; + } + } + /* Preallocate control endpoint request. */ uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL); uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL);