From patchwork Thu Sep 8 16:02:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 12970306 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 F41E0C6FA89 for ; Thu, 8 Sep 2022 16:02:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231731AbiIHQC4 (ORCPT ); Thu, 8 Sep 2022 12:02:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229997AbiIHQCy (ORCPT ); Thu, 8 Sep 2022 12:02:54 -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 C6486D51D4 for ; Thu, 8 Sep 2022 09:02:51 -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 1oWJzN-0000EX-FX; Thu, 08 Sep 2022 18:02:49 +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 1oWJzK-004f3t-Ji; Thu, 08 Sep 2022 18:02:48 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oWJzK-00F6qc-Ur; Thu, 08 Sep 2022 18:02:46 +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: [PATCH v12 0/5] usb: gadget: uvc: use configfs entries for negotiation and v4l2 VIDIOCS Date: Thu, 8 Sep 2022 18:02:40 +0200 Message-Id: <20220908160245.3601176-1-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/ v7: https://lore.kernel.org/linux-usb/20220608105748.139922-1-m.grzeschik@pengutronix.de/ v8: https://lore.kernel.org/linux-usb/20220907140254.2378109-1-m.grzeschik@pengutronix.de/ v9: https://lore.kernel.org/linux-usb/20220907150457.2572474-1-m.grzeschik@pengutronix.de/ v10: https://lore.kernel.org/linux-usb/20220907152101.2582112-1-m.grzeschik@pengutronix.de/ v11: https://lore.kernel.org/linux-usb/20220907152354.2583258-1-m.grzeschik@pengutronix.de/ Regards, Michael Michael Grzeschik (5): 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 v4l2 enumeration api calls usb: gadget: uvc: add VIDIOC hostside config feedback usb: gadget: uvc: add format/frame handling code drivers/media/usb/uvc/uvc_ctrl.c | 1 + drivers/media/usb/uvc/uvc_driver.c | 290 +---------------- drivers/media/usb/uvc/uvc_v4l2.c | 14 +- drivers/media/usb/uvc/uvcvideo.h | 147 --------- drivers/media/v4l2-core/v4l2-common.c | 86 +++++ drivers/usb/gadget/function/f_uvc.c | 270 +++++++++++++++- drivers/usb/gadget/function/uvc.h | 39 ++- drivers/usb/gadget/function/uvc_queue.c | 2 +- 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, 1190 insertions(+), 505 deletions(-) create mode 100644 include/media/v4l2-uvc.h