From patchwork Wed Jun 8 10:57:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 12873281 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 C96A2CCA47F for ; Wed, 8 Jun 2022 10:57:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237716AbiFHK56 (ORCPT ); Wed, 8 Jun 2022 06:57:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237702AbiFHK54 (ORCPT ); Wed, 8 Jun 2022 06:57:56 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44612EFF13 for ; Wed, 8 Jun 2022 03:57:54 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nytNo-0002yn-Ka; Wed, 08 Jun 2022 12:57:52 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1nytNp-007AQ1-08; Wed, 08 Jun 2022 12:57:51 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nytNm-000aQU-NN; Wed, 08 Jun 2022 12:57:50 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com, paul.elder@ideasonboard.com, kernel@pengutronix.de, nicolas@ndufresne.ca, kieran.bingham@ideasonboard.com Subject: [RESEND v7 0/4] usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS Date: Wed, 8 Jun 2022 12:57:44 +0200 Message-Id: <20220608105748.139922-1-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This series improves the uvc video gadget by parsing the configfs entries. With the configfs data, the driver now is able to negotiate the format with the usb host in the kernel and also exports the supported frames/formats/intervals via the v4l2 VIDIOC interface. The uvc userspace stack is also under development. One example is an generic v4l2uvcsink gstreamer elemnt, which is currently under discussion. [1] [1] https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1304 With the libusbgx library [1] used by the gadget-tool [2] it is now also possible to fully describe the configfs layout of the uvc gadget with scheme files. [2] https://github.com/linux-usb-gadgets/libusbgx/pull/61/commits/53231c76f9d512f59fdc23b65cd5c46b7fb09eb4 [3] https://github.com/linux-usb-gadgets/gt/tree/master/examples/systemd The bigger picture of these patches is to provide a more versatile interface to the uvc gadget. The goal is to simply start a uvc-gadget with the following commands: $ gt load uvc.scheme $ gst-launch v4l2src ! v4l2uvcsink --- v1: https://lore.kernel.org/linux-usb/20210530222239.8793-1-m.grzeschik@pengutronix.de/ v2: https://lore.kernel.org/linux-usb/20211117004432.3763306-1-m.grzeschik@pengutronix.de/ v3: https://lore.kernel.org/linux-usb/20211117122435.2409362-1-m.grzeschik@pengutronix.de/ v4: https://lore.kernel.org/linux-usb/20211205225803.268492-1-m.grzeschik@pengutronix.de/ v5: https://lore.kernel.org/linux-usb/20211209084322.2662616-1-m.grzeschik@pengutronix.de/ v6: https://lore.kernel.org/linux-usb/20220105115527.3592860-1-m.grzeschik@pengutronix.de/ Regards, Michael Michael Grzeschik (4): media: v4l: move helper functions for fractions from uvc to v4l2-common media: uvcvideo: move uvc_format_desc to common header usb: gadget: uvc: add VIDIOC function usb: gadget: uvc: add format/frame handling code drivers/media/usb/uvc/uvc_ctrl.c | 1 + drivers/media/usb/uvc/uvc_driver.c | 286 +--------------- drivers/media/usb/uvc/uvc_v4l2.c | 14 +- drivers/media/usb/uvc/uvcvideo.h | 147 --------- drivers/media/v4l2-core/v4l2-common.c | 82 +++++ drivers/usb/gadget/function/f_uvc.c | 270 +++++++++++++++- drivers/usb/gadget/function/uvc.h | 39 ++- drivers/usb/gadget/function/uvc_queue.c | 3 +- drivers/usb/gadget/function/uvc_v4l2.c | 412 +++++++++++++++++++++--- drivers/usb/gadget/function/uvc_video.c | 71 +++- include/media/v4l2-common.h | 4 + include/media/v4l2-uvc.h | 359 +++++++++++++++++++++ 12 files changed, 1187 insertions(+), 501 deletions(-) create mode 100644 include/media/v4l2-uvc.h