From patchwork Thu Mar 30 11:58:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 13194083 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 2F3A5C761A6 for ; Thu, 30 Mar 2023 11:59:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230425AbjC3L7D (ORCPT ); Thu, 30 Mar 2023 07:59:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229988AbjC3L7C (ORCPT ); Thu, 30 Mar 2023 07:59:02 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3036FA24B for ; Thu, 30 Mar 2023 04:59:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1680177541; x=1711713541; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Ym6m14y3NMAFvdrU29p8KczAOiAtsNpHaGz191R2Eyg=; b=h52JkzMwIu33HoAVqN4qznND3YYgogiGsap5gWK8LZgC7twpfzUE6sfw IROjf4c2xkmvx8LVMm9Y7uMIuJbRcgNlunPbK77qSbCn1Eo24YOxp6YMo kCiU2VPM++aufwIBEmjS7fRcMXBnLdRo3KwQqSXOssmnsiTVDctQQNoBr qbwmvt0hnB6JcLBumInROh462jgfCC4HNLqCj6eNVMs9tPL38J4bNe3Av fV7BxaLQfC3n1165gC0vrxknzYhHPt6Mym4m9JhtoHPg77oqvUyXYoJuK K4q3+Slom+FyFc09WOAXq9CxtTGh5JgjYylT7NZQOfj1sZQzUVcVqvTLI Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10664"; a="406111319" X-IronPort-AV: E=Sophos;i="5.98,303,1673942400"; d="scan'208";a="406111319" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2023 04:59:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10664"; a="714952898" X-IronPort-AV: E=Sophos;i="5.98,303,1673942400"; d="scan'208";a="714952898" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2023 04:58:57 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id E45AE122457; Thu, 30 Mar 2023 14:58:53 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org Cc: Philipp Zabel , Laurent Pinchart , hverkuil@xs4all.nl, Francesco Dolcini , aishwarya.kothari@toradex.com, Robert Foss , Todor Tomov , Hyun Kwon Subject: [PATCH 00/18] Separate links and async sub-devices Date: Thu, 30 Mar 2023 14:58:35 +0300 Message-Id: <20230330115853.1628216-1-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi all, This set adds support for multiple downstream links in an async sub-device, by separating the sub-device registration from the link creation. A new concept, V4L2 async connection is added. Generally async notifiers have a number of connections but at that level there is no knowledge of how many sub-devices they will connect to. The bound and unbound callbacks now work on connections. For the existing drivers there's only one connection so I do not expect regressions because of that. Async sub-device fwnode matching will now take place between the device (the dev field of struct v4l2_subdev) and a struct v4l2_async_connection (an endpoint for devices that have endpoints or the device for those that do not). This is because the graph data structure only describes point-to-point connections so therefore defining one end of the connection defines the entire connection. This set is unlikely to address all needs people have related to the async framework but I think that beyond what it does, it paves some way for addressing more of those additional needs. To be frank, I'd like to get rid of the entire V4L2 async framework, but it would require allowing much more dynamic driver initialisation, including sub-devices and device nodes popping up in the system in the order and extent there is successfully probed hardware. Until that, and this may well be the entire foreseeable future, we have at least some of this complexity. There's a bugfix, too, in the first patch. That should be merged separately. The rest depends on it so I'm sending it as part of the set. since RFC v1: - Address missing API usage changes in a lot of drivers. - Fix compilation problems in intermediate patches. - Move V4L2 device registration earlier or move notifier initialisation and fwnode endpoint parsing past the current V4L2 device registration (patches 11--16). Sakari Ailus (18): media: v4l: async: Return async sub-devices to subnotifier list media: v4l: async: Add some debug prints media: v4l: async: Simplify async sub-device fwnode matching media: v4l: async: Make V4L2 async match information a struct media: v4l: async: Clean testing for duplicated async subdevs media: v4l: async: Only pass match information for async subdev validation media: v4l: async: Clean up list heads and entries media: v4l: async: Rename v4l2_async_subdev as v4l2_async_connection media: v4l: async: Differentiate connecting and creating sub-devices media: pxa_camera: Register V4L2 device early, fix probe error handling media: marvell: cafe: Register V4L2 device earlier media: am437x-vpfe: Register V4L2 device early media: omap3isp: Initialise V4L2 async notifier later media: xilinx-vipp: Init async notifier after registering V4L2 device media: davinci: Init async notifier after registering V4L2 device media: qcom: Initialise V4L2 async notifier later media: v4l: async: Set v4l2_device in async notifier init Documentation: media: Document sub-device notifiers .../driver-api/media/v4l2-subdev.rst | 16 +- drivers/media/i2c/adv748x/adv748x-csi2.c | 3 - drivers/media/i2c/max9286.c | 27 +- drivers/media/i2c/rdacm20.c | 15 +- drivers/media/i2c/rdacm21.c | 15 +- drivers/media/i2c/st-mipid02.c | 12 +- drivers/media/i2c/tc358746.c | 13 +- drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 14 +- drivers/media/platform/atmel/atmel-isi.c | 12 +- drivers/media/platform/atmel/atmel-isi.h | 2 +- drivers/media/platform/cadence/cdns-csi2rx.c | 10 +- drivers/media/platform/intel/pxa_camera.c | 46 +- drivers/media/platform/marvell/cafe-driver.c | 19 +- drivers/media/platform/marvell/mcam-core.c | 12 +- drivers/media/platform/marvell/mmp-driver.c | 6 +- .../platform/microchip/microchip-csi2dc.c | 11 +- .../platform/microchip/microchip-isc-base.c | 4 +- .../media/platform/microchip/microchip-isc.h | 2 +- .../microchip/microchip-sama5d2-isc.c | 9 +- .../microchip/microchip-sama7g5-isc.c | 9 +- drivers/media/platform/nxp/imx-mipi-csis.c | 10 +- drivers/media/platform/nxp/imx7-media-csi.c | 10 +- drivers/media/platform/qcom/camss/camss.c | 26 +- drivers/media/platform/qcom/camss/camss.h | 2 +- drivers/media/platform/renesas/rcar-isp.c | 12 +- .../platform/renesas/rcar-vin/rcar-core.c | 26 +- .../platform/renesas/rcar-vin/rcar-csi2.c | 12 +- .../platform/renesas/rcar-vin/rcar-vin.h | 4 +- drivers/media/platform/renesas/rcar_drif.c | 12 +- drivers/media/platform/renesas/renesas-ceu.c | 10 +- .../platform/renesas/rzg2l-cru/rzg2l-core.c | 14 +- .../platform/renesas/rzg2l-cru/rzg2l-cru.h | 2 +- .../platform/renesas/rzg2l-cru/rzg2l-csi2.c | 12 +- .../platform/rockchip/rkisp1/rkisp1-dev.c | 12 +- .../platform/samsung/exynos4-is/media-dev.c | 11 +- .../platform/samsung/exynos4-is/media-dev.h | 2 +- drivers/media/platform/st/stm32/stm32-dcmi.c | 12 +- .../platform/sunxi/sun4i-csi/sun4i_csi.c | 10 +- .../sunxi/sun6i-csi/sun6i_csi_bridge.c | 8 +- .../sunxi/sun6i-csi/sun6i_csi_bridge.h | 2 +- .../sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.c | 10 +- .../sun8i_a83t_mipi_csi2.c | 10 +- .../media/platform/ti/am437x/am437x-vpfe.c | 37 +- .../media/platform/ti/am437x/am437x-vpfe.h | 2 +- drivers/media/platform/ti/cal/cal.c | 10 +- .../media/platform/ti/davinci/vpif_capture.c | 33 +- drivers/media/platform/ti/omap3isp/isp.c | 17 +- drivers/media/platform/video-mux.c | 10 +- drivers/media/platform/xilinx/xilinx-vipp.c | 29 +- drivers/media/v4l2-core/v4l2-async.c | 601 +++++++++++------- drivers/media/v4l2-core/v4l2-fwnode.c | 20 +- .../media/deprecated/atmel/atmel-isc-base.c | 4 +- .../media/deprecated/atmel/atmel-isc.h | 2 +- .../deprecated/atmel/atmel-sama5d2-isc.c | 9 +- .../deprecated/atmel/atmel-sama7g5-isc.c | 4 +- drivers/staging/media/imx/imx-media-csi.c | 10 +- .../staging/media/imx/imx-media-dev-common.c | 8 +- drivers/staging/media/imx/imx-media-dev.c | 2 +- drivers/staging/media/imx/imx-media-of.c | 4 +- drivers/staging/media/imx/imx6-mipi-csi2.c | 12 +- drivers/staging/media/imx/imx8mq-mipi-csi2.c | 10 +- .../media/sunxi/sun6i-isp/sun6i_isp_proc.c | 6 +- .../media/sunxi/sun6i-isp/sun6i_isp_proc.h | 2 +- drivers/staging/media/tegra-video/vi.c | 18 +- drivers/staging/media/tegra-video/vi.h | 2 +- include/media/davinci/vpif_types.h | 2 +- include/media/v4l2-async.h | 181 +++--- include/media/v4l2-fwnode.h | 10 +- include/media/v4l2-subdev.h | 2 +- 69 files changed, 825 insertions(+), 708 deletions(-)