From patchwork Tue Oct 18 21:50:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Vacura X-Patchwork-Id: 4339 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:3c08:b0:7f:eb39:1b51 with SMTP id e8csp3542410dys; Tue, 18 Oct 2022 14:56:12 -0700 (PDT) X-Google-Smtp-Source: AMsMyM4xhcHLHXMDEU6gHNbncdVJGr4g77RkUbw8znQihemupXdiPZM532LSqeMiUAaAfb/ILQP2 X-Received: by 2002:a17:906:8a4b:b0:78d:d475:ff74 with SMTP id gx11-20020a1709068a4b00b0078dd475ff74mr3979914ejc.131.1666130172081; Tue, 18 Oct 2022 14:56:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666130172; cv=none; d=google.com; s=arc-20160816; b=Y9EeWNdnv6G2A6pxbbsUrmB6dDvAnjhWkMDK8gU3wVYE23jTjkXkwtMev3Bvu9CZtv 9Q2GAlzMlkw8Snpg50+w9xpf4/NlSMNi+7yIKFLqZJ3YgtzG+PdLDWgeyWuJmqGhmxZF KQfKZxIhAZoF4J6MwWJYlhuyeVOYOIbhRiwR7cKmHGDKNyue9OKEqkuzKc/PLTrpwiBo gLHMJOqO84vL9VqmqeSevv3sEZvhQ6zroj01swUbyJ9desa43sTpj0oRMTYMmTkrO124 JmlyvQUNt9O579BT3XBLq2fgrtxz/TAUdueIeb+W0rKAvBNypQPPy7NSGJ49hd0pZ1bQ 48fA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=8C4mpLzfAGmUvqoBtRBj2oPSMTlDzsJxu1HgUPQnxFc=; b=HexpYit/C3HyMdd8cMQXIjxFrAN/7tIqd7cET0U1nIiX1PZaevVUAzZBsrpQL/mph4 1pe+lJU5ccO9ZTcH3qdZs78Zl+IgAKdzED42Abgebvq5alrWQ1xe0r+fMf1/72a9+oCr 5OUHD+TvH0neT31OgxyEIEQ5qYCorexyWhPv/H9BH8b2NSIfZEmiSvSjA7qpKW5j2HUE KNDmUr5pP43ZGTSqgUqAZcNaGrWxunkzlCXQMfPx76GTkjOjboJsySUjgKdhSOzdgQhm VH+fahyB18wbCMPhPI/0AD5+6Q+yfxPazmhas5i8rfaQ8vqYCJbK8pkP81R0WMMrCN0a 8Ctw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@motorola.com header.s=Selector header.b=qX84A6D9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=motorola.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id bv24-20020a170906b1d800b0078dc3be6508si11771457ejb.192.2022.10.18.14.55.46; Tue, 18 Oct 2022 14:56:12 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@motorola.com header.s=Selector header.b=qX84A6D9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=motorola.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230076AbiJRVvr (ORCPT + 99 others); Tue, 18 Oct 2022 17:51:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35344 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230009AbiJRVvc (ORCPT ); Tue, 18 Oct 2022 17:51:32 -0400 Received: from mail1.bemta33.messagelabs.com (mail1.bemta33.messagelabs.com [67.219.247.6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A7B47CAE55; Tue, 18 Oct 2022 14:51:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=motorola.com; s=Selector; t=1666129889; i=@motorola.com; bh=8C4mpLzfAGmUvqoBtRBj2oPSMTlDzsJxu1HgUPQnxFc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding; b=qX84A6D9CB5ogQPXoUAJL4ECeD6qUMTDh7ABwIrIdel4AhXNiJaqt8/O/tpWT/EfJ 7acGYcMF1G6FRTzLvR2BTZQf2Rar6sy4vBtmiCBkhbA4ZuNU5CTzMeGguDGLQ3yBJZ SbdL5cx3FDq0yNMOquGW8O7aht9QB1oUfWR9BEhg0uWBvKfV290Eg55wzCrSRe/Qxz xljd5T4nzlYnVKPwwc+xGYQsvBW96btMR80Q+Yy875EI9wpX8OckkfvxqjCuFQYnD3 hlu2nBBOS98xc2F1p67PG/QPgzDywcf/qzfKoWmcK8iIjYcZ4jWPmtADkmxbZ9yytj kR/iDfrGizpkw== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrIIsWRWlGSWpSXmKPExsWS8eKJuO4Def9 kg7cPhC2OtT1ht3hyoJ3RonfZHjaL5sXr2Sw6Jy5ht1jYtoTF4vKuOWwWi5a1MltsabvCZPHj Tx+zxaoFB9gduD1md8xk9di0qpPNY//cNewei/sms3r0/zXw2LL/M6PH501yAexRrJl5SfkVC awZDQdfsRTcNaiY/PgWcwPjN80uRi4OIYEZTBLT1z5ghHDWMUlMfXiQvYuRk4NNQE1iwetVzC C2iICsxOErv5lBipgFnjNLHP60DiwhLBAgcebTazYQm0VAVeLXoueMIDavgKXE1d13wQZJCMh L7D94FqyeU8BKouthGwuILQRU87j1CitEvaDEyZlPwOLMQPXNW2czT2DknYUkNQtJagEj0ypG s+LUorLUIl1DS72kosz0jJLcxMwcvcQq3US90mLd1MTiEl0jvcTyYr3U4mK94src5JwUvbzUk k2MwNBPKXL/uYNx/rI/eocYJTmYlER553zzSxbiS8pPqcxILM6ILyrNSS0+xCjDwaEkwcsp5Z 8sJFiUmp5akZaZA4xDmLQEB4+SCG+aDFCat7ggMbc4Mx0idYpRl6Nzf9cBZiGWvPy8VClxXm5 ZoCIBkKKM0jy4EbCUcIlRVkqYl5GBgUGIpyC1KDezBFX+FaM4B6OSMO8BkFU8mXklcJteAR3B BHSE6RY/kCNKEhFSUg1MM3iy9x158saluiVWxXOZZNvmLT/ffZrqeNBn4WWTun1fvRuuVefMu zajbtWLv+sb3lqKb5DaJvfnbuyvlVHl82S1s5e/zd9Y5uj1T0RFbIHc0133l7FULp7hP+fp4S 81U7SuXpupP5XlyNbZWtpyRT+slzJc8Bb/sk5Y8MA11U1v4jOic3eZ7FzELn+TxfDGhuaz6i/ 8T8keOjrPmeXJ96Rt/lfOW3b0SqoW5zyaKdp4XXOxTs6Vpv+qqTPi9sfL5P8Tr5z84fi81lfc wWapNh6n9r65KtXH7Vdqca8iXUlL7Z0X6+k6n8yXIhMZ7/P3eFyYdq/JhEO91z703fd7bV+Ek zbPli0LeK4rM5FhjRJLcUaioRZzUXEiAIYJe2KEAwAA X-Env-Sender: w36195@motorola.com X-Msg-Ref: server-12.tower-715.messagelabs.com!1666129888!57532!1 X-Originating-IP: [104.232.228.23] X-SYMC-ESS-Client-Auth: outbound-route-from=pass X-StarScan-Received: X-StarScan-Version: 9.100.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 20118 invoked from network); 18 Oct 2022 21:51:28 -0000 Received: from unknown (HELO va32lpfpp03.lenovo.com) (104.232.228.23) by server-12.tower-715.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 18 Oct 2022 21:51:28 -0000 Received: from va32lmmrp02.lenovo.com (va32lmmrp02.mot.com [10.62.176.191]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by va32lpfpp03.lenovo.com (Postfix) with ESMTPS id 4MsSHM6xjrz50WfM; Tue, 18 Oct 2022 21:51:27 +0000 (UTC) Received: from p1g3.mot.com (unknown [100.64.172.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: w36195) by va32lmmrp02.lenovo.com (Postfix) with ESMTPSA id 4MsSHM5G9Mzf6WS; Tue, 18 Oct 2022 21:51:27 +0000 (UTC) From: Dan Vacura To: linux-usb@vger.kernel.org Cc: Daniel Scally , Thinh Nguyen , Jeff Vanhoof , Dan Vacura , Greg Kroah-Hartman , Jonathan Corbet , Laurent Pinchart , Felipe Balbi , Paul Elder , Michael Grzeschik , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v4 5/6] usb: gadget: uvc: make interrupt skip logic configurable Date: Tue, 18 Oct 2022 16:50:41 -0500 Message-Id: <20221018215044.765044-6-w36195@motorola.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221018215044.765044-1-w36195@motorola.com> References: <20221018215044.765044-1-w36195@motorola.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747064111422275164?= X-GMAIL-MSGID: =?utf-8?q?1747064111422275164?= Some UDC hw may not support skipping interrupts, but still support the request. Allow the interrupt frequency to be configurable to the user. Signed-off-by: Dan Vacura --- V1 -> V2: - no change, new patch in series V2 -> V3: - default to baseline value of 4, fix storing the initial value V3 -> V4: - no change Documentation/ABI/testing/configfs-usb-gadget-uvc | 1 + Documentation/usb/gadget-testing.rst | 2 ++ drivers/usb/gadget/function/f_uvc.c | 3 +++ drivers/usb/gadget/function/u_uvc.h | 1 + drivers/usb/gadget/function/uvc.h | 2 ++ drivers/usb/gadget/function/uvc_configfs.c | 2 ++ drivers/usb/gadget/function/uvc_queue.c | 6 ++++++ drivers/usb/gadget/function/uvc_video.c | 3 ++- 8 files changed, 19 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uvc b/Documentation/ABI/testing/configfs-usb-gadget-uvc index 611b23e6488d..5dfaa3f7f6a4 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uvc +++ b/Documentation/ABI/testing/configfs-usb-gadget-uvc @@ -8,6 +8,7 @@ Description: UVC function directory streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss) streaming_interval 1..16 function_name string [32] + req_int_skip_div unsigned int =================== ============================= What: /config/usb-gadget/gadget/functions/uvc.name/control diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst index 2278c9ffb74a..f9b5a09be1f4 100644 --- a/Documentation/usb/gadget-testing.rst +++ b/Documentation/usb/gadget-testing.rst @@ -794,6 +794,8 @@ The uvc function provides these attributes in its function directory: sending or receiving when this configuration is selected function_name name of the interface + req_int_skip_div divisor of total requests to aid in calculating + interrupt frequency, 0 indicates all interrupt =================== ================================================ There are also "control" and "streaming" subdirectories, each of which contain diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 6e196e06181e..e40ca26b9c55 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -655,6 +655,8 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f) cpu_to_le16(max_packet_size * max_packet_mult * (opts->streaming_maxburst + 1)); + uvc->config_skip_int_div = opts->req_int_skip_div; + /* Allocate endpoints. */ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); if (!ep) { @@ -872,6 +874,7 @@ static struct usb_function_instance *uvc_alloc_inst(void) opts->streaming_interval = 1; opts->streaming_maxpacket = 1024; + opts->req_int_skip_div = 4; snprintf(opts->function_name, sizeof(opts->function_name), "UVC Camera"); ret = uvcg_attach_configfs(opts); diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h index 24b8681b0d6f..6f73bd5638ed 100644 --- a/drivers/usb/gadget/function/u_uvc.h +++ b/drivers/usb/gadget/function/u_uvc.h @@ -24,6 +24,7 @@ struct f_uvc_opts { unsigned int streaming_interval; unsigned int streaming_maxpacket; unsigned int streaming_maxburst; + unsigned int req_int_skip_div; unsigned int control_interface; unsigned int streaming_interface; diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index 40226b1f7e14..29f9477c92cc 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -107,6 +107,7 @@ struct uvc_video { spinlock_t req_lock; unsigned int req_int_count; + unsigned int req_int_skip_div; void (*encode) (struct usb_request *req, struct uvc_video *video, struct uvc_buffer *buf); @@ -155,6 +156,7 @@ struct uvc_device { /* Events */ unsigned int event_length; unsigned int event_setup_out : 1; + unsigned int config_skip_int_div; }; static inline struct uvc_device *to_uvc(struct usb_function *f) diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index 4303a3283ba0..419e926ab57e 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -2350,6 +2350,7 @@ UVC_ATTR(f_uvc_opts_, cname, cname) UVCG_OPTS_ATTR(streaming_interval, streaming_interval, 16); UVCG_OPTS_ATTR(streaming_maxpacket, streaming_maxpacket, 3072); UVCG_OPTS_ATTR(streaming_maxburst, streaming_maxburst, 15); +UVCG_OPTS_ATTR(req_int_skip_div, req_int_skip_div, UINT_MAX); #undef UVCG_OPTS_ATTR @@ -2399,6 +2400,7 @@ static struct configfs_attribute *uvc_attrs[] = { &f_uvc_opts_attr_streaming_interval, &f_uvc_opts_attr_streaming_maxpacket, &f_uvc_opts_attr_streaming_maxburst, + &f_uvc_opts_attr_req_int_skip_div, &f_uvc_opts_string_attr_function_name, NULL, }; diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index 0aa3d7e1f3cc..02559906a55a 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -63,6 +63,12 @@ static int uvc_queue_setup(struct vb2_queue *vq, */ nreq = DIV_ROUND_UP(DIV_ROUND_UP(sizes[0], 2), req_size); nreq = clamp(nreq, 4U, 64U); + if (0 == video->uvc->config_skip_int_div) { + video->req_int_skip_div = nreq; + } else { + video->req_int_skip_div = min_t(unsigned int, nreq, + video->uvc->config_skip_int_div); + } video->uvc_num_requests = nreq; return 0; diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index dd1c6b2ca7c6..c1a80c5d1f63 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -423,7 +423,8 @@ static void uvcg_video_pump(struct work_struct *work) if (list_empty(&video->req_free) || buf->state == UVC_BUF_STATE_DONE || !(video->req_int_count % - DIV_ROUND_UP(video->uvc_num_requests, 4))) { + DIV_ROUND_UP(video->uvc_num_requests, + video->req_int_skip_div))) { video->req_int_count = 0; req->no_interrupt = 0; } else {