From patchwork Thu Sep 26 23:37:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 13813754 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 47DD21B011E for ; Thu, 26 Sep 2024 23:37:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727393873; cv=none; b=nW6MWfXRjI7RrzTai1YEyRtO/mTqbT0lLVLPPWrMXUX1ossNcBzelZSgPpHk7X5LdVgMSYowKkVPKz2/4QrTEUeyrX7rmjlAMKHevlGo67V/j7CfOajHht92DYnfGiCIcF2NhAOArxlYSaIT55wU8Tz68r3XbFAGSOp6wJvLRMc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727393873; c=relaxed/simple; bh=vHXFLUU+y+3pf2Umb7EfHapkoh6hw41as8tjpDPtTzo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=N/854xt3nyNShmClmhRHdDGa8AWN+lSwg9QluqvTXFuYNDZ0pWI9NmmdQyhcpUcCF9oil/zVZJ4Ed3CeCimak8yogcfzArJJ6/HaGr7CYUNXOiqXILjsn9yfZ4lqIHbxV45YSeymmmAR4nxd21lNGRFKoJ2ngTlTFn28M0nbXmw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sty3N-0007WM-22; Fri, 27 Sep 2024 01:37:45 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sty3M-001nOX-EO; Fri, 27 Sep 2024 01:37:44 +0200 Received: from localhost ([::1] helo=dude04.red.stw.pengutronix.de) by dude04.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1sty3L-005IAz-2x; Fri, 27 Sep 2024 01:37:44 +0200 From: Michael Grzeschik Date: Fri, 27 Sep 2024 01:37:45 +0200 Subject: [PATCH v5 6/9] usb: gadget: uvc: set req_length based on payload by nreqs instead of req_size Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240403-uvc_request_length_by_interval-v5-6-2de78794365c@pengutronix.de> References: <20240403-uvc_request_length_by_interval-v5-0-2de78794365c@pengutronix.de> In-Reply-To: <20240403-uvc_request_length_by_interval-v5-0-2de78794365c@pengutronix.de> To: Laurent Pinchart , Daniel Scally , Greg Kroah-Hartman , Avichal Rakesh , Jayant Chowdhary Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Grzeschik X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=5686; i=m.grzeschik@pengutronix.de; h=from:subject:message-id; bh=vHXFLUU+y+3pf2Umb7EfHapkoh6hw41as8tjpDPtTzo=; b=owEBbQKS/ZANAwAKAb9pWET5cfSrAcsmYgBm9fBGQBBFyvRTvKNrvCOoDUXWMvep5pk+Z4w+8 ME81qpJCfCJAjMEAAEKAB0WIQQV2+2Fpbqd6fvv0Gi/aVhE+XH0qwUCZvXwRgAKCRC/aVhE+XH0 q/VhD/4tL8V5YkIrBDhVu2qE6dSzbTlzEPno9s0XHc0kchi04Fbhcf7P4Q2m1YYhTlTXAJkH21W Mqq7F0rGF4YbBZr1nPx1/T0PapJN40KJzpe8naQm2XqovpFr3Tm8+R/gVNi4fccCzw8Pv7dTqs0 CWXQ+K/bMO8h24qEFzzYDCmvEIl2nz6fy2bZyL2rx4AJ10x+QL87dtoDpxEI3sb4p+qfj5YOUT+ OUuSU7lhGMc7LGykCQbxDpMMJseNdl7QHCQe/n28Lr1J+TIbAe1b8ogRR4v9BFby/cWwMLml4OF DA5kfMU4nGJslZcmkYUvAzG8jjCqkM5Zsi/oNPMjCyqUK6qmMDqXONfrTpmhzrU/9x5Lg7jNoJj Pf/LFs2WkiitDrNK2eVA5Suz1weby7V57z6y68jwot3zlF4gx56mJlL1YqLbUoOB+osCd/LATHG xrPhURsAl0kp/vOGSHdpMeO496/4riB8nV3Fb1TpCVj9xvNPiTfhWCBEO78UWfNMzu8SDTwt80G +JunkmqYQW0vHDdT2R9ZCQaBwTUZmJTr1FFPbXfynYdlcyIxzKE1oG30pQ9JgrN9d26+5dpqJ0N 9p1RoIuA+bW7Vf4IW8SCoL91EYr0QSQeqD+k14kK49xDJU9pEs0WCrRXaFz5ZDrqObaEXT0idER wpNPi87FmXUXmDA== X-Developer-Key: i=m.grzeschik@pengutronix.de; a=openpgp; fpr=957BC452CE953D7EA60CF4FC0BE9E3157A1E2C64 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: m.grzeschik@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Compressed formats generate content depending amount of data that is set in the vb2 buffer by the payload_size. When streaming those formats it is better to scatter that smaller data over all requests. This patch is doing that by introducing the calculated req_payload_size which is updated by each frame. It the uses this amount of data to fill the isoc requests instead of the video->req_size. For uncompressed formats it will not make a difference since the payload size will be equal to the imagesize. Therefore the code will have no effecta as req_payload_size will be equal to req_size. Signed-off-by: Michael Grzeschik --- v4 -> v5: - keep using req_size instead of len in encode_isoc_sg to be more explicit - using new initialized variable reqs_per_frame instead of two calculations - reordered this patch in the series v1 -> v4: - --- drivers/usb/gadget/function/uvc.h | 2 ++ drivers/usb/gadget/function/uvc_queue.c | 10 ++++++++-- drivers/usb/gadget/function/uvc_queue.h | 2 ++ drivers/usb/gadget/function/uvc_video.c | 15 ++++++++------- 4 files changed, 20 insertions(+), 9 deletions(-) diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index 099038f1088ef..bedb4ef42864f 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -110,6 +110,8 @@ struct uvc_video { unsigned int uvc_num_requests; + unsigned int reqs_per_frame; + /* Requests */ bool is_enabled; /* tracks whether video stream is enabled */ unsigned int req_size; diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index 731e3b9d21acc..6757a4e25a743 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -58,6 +58,7 @@ static int uvc_queue_setup(struct vb2_queue *vq, static int uvc_buffer_prepare(struct vb2_buffer *vb) { struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue); + struct uvc_video *video = container_of(queue, struct uvc_video, queue); struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); struct uvc_buffer *buf = container_of(vbuf, struct uvc_buffer, buf); @@ -78,10 +79,15 @@ static int uvc_buffer_prepare(struct vb2_buffer *vb) buf->mem = vb2_plane_vaddr(vb, 0); } buf->length = vb2_plane_size(vb, 0); - if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { buf->bytesused = 0; - else + } else { buf->bytesused = vb2_get_plane_payload(vb, 0); + buf->req_payload_size = + DIV_ROUND_UP(buf->bytesused + + (video->reqs_per_frame * UVCG_REQUEST_HEADER_LEN), + video->reqs_per_frame); + } return 0; } diff --git a/drivers/usb/gadget/function/uvc_queue.h b/drivers/usb/gadget/function/uvc_queue.h index 41f87b917f6bc..b54becc570a38 100644 --- a/drivers/usb/gadget/function/uvc_queue.h +++ b/drivers/usb/gadget/function/uvc_queue.h @@ -39,6 +39,8 @@ struct uvc_buffer { unsigned int offset; unsigned int length; unsigned int bytesused; + /* req_payload_size: only used with isoc */ + unsigned int req_payload_size; }; #define UVC_QUEUE_DISCONNECTED (1 << 0) diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 4efd7585d7541..0287a56fa50ad 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -136,7 +136,7 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, unsigned int pending = buf->bytesused - video->queue.buf_used; struct uvc_request *ureq = req->context; struct scatterlist *sg, *iter; - unsigned int len = video->req_size; + unsigned int len = buf->req_payload_size; unsigned int sg_left, part = 0; unsigned int i; int header_len; @@ -146,15 +146,15 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, /* Init the header. */ header_len = uvc_video_encode_header(video, buf, ureq->header, - video->req_size); + buf->req_payload_size); sg_set_buf(sg, ureq->header, header_len); len -= header_len; if (pending <= len) len = pending; - req->length = (len == pending) ? - len + header_len : video->req_size; + req->length = (len == pending) ? len + header_len : + buf->req_payload_size; /* Init the pending sgs with payload */ sg = sg_next(sg); @@ -202,7 +202,7 @@ uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, { void *mem = req->buf; struct uvc_request *ureq = req->context; - int len = video->req_size; + int len = buf->req_payload_size; int ret; /* Add the header. */ @@ -214,7 +214,7 @@ uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, ret = uvc_video_encode_data(video, buf, mem, len); len -= ret; - req->length = video->req_size - len; + req->length = buf->req_payload_size - len; if (buf->bytesused == video->queue.buf_used || video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE) { @@ -504,7 +504,7 @@ uvc_video_prep_requests(struct uvc_video *video) if (!usb_endpoint_xfer_isoc(video->ep->desc)) { video->req_size = max_req_size; - video->uvc_num_requests = + video->reqs_per_frame = video->uvc_num_requests = DIV_ROUND_UP(video->imagesize, max_req_size); return; @@ -535,6 +535,7 @@ uvc_video_prep_requests(struct uvc_video *video) * able to fully encode one frame. */ video->uvc_num_requests = nreq + UVCG_REQ_MAX_ZERO_COUNT; + video->reqs_per_frame = nreq; } static int