From patchwork Tue May 16 09:54:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 13242852 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 AF149C7EE24 for ; Tue, 16 May 2023 09:56:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232214AbjEPJ4J (ORCPT ); Tue, 16 May 2023 05:56:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232184AbjEPJ4H (ORCPT ); Tue, 16 May 2023 05:56:07 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06535199C for ; Tue, 16 May 2023 02:56:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684230966; x=1715766966; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=fy5t0pd5yl0s8kWSCIG/CXvyEMKq4vYOMvKeooJ/ANA=; b=gtgl7TfHYuQW2SBiQJNOaVvU37do1Rd6N8/4nQMs/8PTtLh/1v5Lg/JR SvTFSzM79hIfwYYdDqkPn5nGbjxZOR5a/Yn19l+uZpsFPmkQRM6kQ76N4 xVFyZp+xpj+IFkSXVQo7Y1O1lDXH1GWz/RHzms3F025KDjc2xryTB77OE I+3OjTBJJ7oOTtueYZAd8oB+PtOqOkDPLoT4czI8JcUK1w3Tq5ECKaNvl VNiZfSotMRUWdynNAuKNMgq5OrgNZRLEjYt2EIvlYDzdzd+ZUhtW11ONg 29GlJi2rW7rESwt2errJBoQ/dm76SxbmTWUyy9DSivfb/7P41u7IqRsgC g==; X-IronPort-AV: E=McAfee;i="6600,9927,10711"; a="353715208" X-IronPort-AV: E=Sophos;i="5.99,278,1677571200"; d="scan'208";a="353715208" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2023 02:55:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10711"; a="678791317" X-IronPort-AV: E=Sophos;i="5.99,278,1677571200"; d="scan'208";a="678791317" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2023 02:55:38 -0700 Received: from punajuuri.localdomain (punajuuri.localdomain [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id D4484120279; Tue, 16 May 2023 12:55:35 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.94.2) (envelope-from ) id 1pyrOx-002Z9b-Qn; Tue, 16 May 2023 12:55:27 +0300 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, Philipp Zabel , hverkuil@xs4all.nl, Francesco Dolcini , aishwarya.kothari@toradex.com, Robert Foss , Todor Tomov , Hyun Kwon , bingbu.cao@intel.com Subject: [PATCH v2 00/31] Separate links and async sub-devices Date: Tue, 16 May 2023 12:54:46 +0300 Message-Id: <20230516095517.611711-1-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. A connection later on translates to an MC ancillary or data link. 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. since v1: - Fixed object relation issues. The set has now been tested on an async sub-device with two pads connected by data links to sub-devices on a notifier (struct) device. (Multiple notifiers should work, too, but has not been tested.) - Add a function to obtain an async connection based on the sub-device. This is useful for drivers for accessing their own link specific data. - Improved documentation. Include a patch documenting v4l2_async_nf_add_fwnode(). - Return endpoint matching and address adv748x driver breakage in v1. It's a special case so other drivers can remain simpler. - Swap notifier initialisation arguments, by making the notifier the first argument. - Remove extra fwnode_handle_put() in max9286_v4l2_unregister(). - Make struct device available before notifier initialisation for consistent debug messages. - Simplify notifier and async sub-device linked lists. Consistent list head and list entry naming. - Drop leftovers from an early experimenation work in rkisp1 and omap3isp drivers. - Simplify xilinx-vipp sub-device binding. - Use if()s in notifier_dev() of v4l2-async.c. - Improved debug messages in v4l2-async.c, use v4l2-async prefix and generally with notifier device. - Call match types with macros V4L2_ASYNC_MATCH_TYPE_* (was V4L2_ASYNC_MATCH_*). - Create ancillary links only when the sub-device is registered, not when a connection is bound (which can take place more than once for a sub-device). - Rename struct v4l2_async_match as v4l2_async_match_desc. - Perform list initialisation in notifier init rather than registration. - Get rid of the "readd" parameter for v4l2_async_nf_unbind_all_subdevs(). - Check async sub-device validity on a notifier only when the notifier is registered. This removes extra list traversal and simplifies the code. - Remove extra list initialisation in v4l2_async_register_subdev(). - Drop v4l2_async_cleanup(). It was no longer useful, called from a single place. - Lots of kerneldoc fixes (mostly changed argument names). 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). Jacopo Mondi (1): media: v4l: async: Drop v4l2_async_nf_parse_fwnode_endpoints() Sakari Ailus (30): media: Documentation: v4l: Document missing async subdev function media: xilinx-vipp: Clean up bound async notifier callback media: v4l: async: Add some debug prints media: v4l: async: Clean testing for duplicated async subdevs media: v4l: async: Drop unneeded list entry initialisation media: v4l: async: Don't check whether asd is NULL in validity check media: v4l: async: Make V4L2 async match information a struct media: v4l: async: Rename V4L2_ASYNC_MATCH_ macros, add TYPE_ media: v4l: async: Only pass match information for async subdev validation media: v4l: async: Clean up list heads and entries media: v4l: async: Simplify async sub-device fwnode matching media: v4l: async: Rename v4l2_async_subdev as v4l2_async_connection media: v4l: async: Clean up error handling in v4l2_async_match_notify media: v4l: async: Drop duplicate handling when adding connections media: v4l: async: Rework internal lists media: v4l: async: Obtain async connection based on sub-device media: v4l: async: Differentiate connecting and creating sub-devices media: v4l: async: Try more connections media: v4l: async: Support fwnode endpoint list matching for subdevs media: adv748x: Return to endpoint matching media: pxa_camera: Fix probe error handling 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 media: Documentation: v4l: Document sub-device notifiers .../driver-api/media/v4l2-subdev.rst | 28 +- drivers/media/i2c/adv748x/adv748x-csi2.c | 13 +- drivers/media/i2c/max9286.c | 27 +- drivers/media/i2c/rdacm20.c | 16 +- drivers/media/i2c/rdacm21.c | 15 +- drivers/media/i2c/st-mipid02.c | 12 +- drivers/media/i2c/tc358746.c | 15 +- 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 | 77 +- drivers/media/platform/marvell/cafe-driver.c | 18 +- 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 +- .../platform/nxp/imx8-isi/imx8-isi-core.c | 12 +- 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-common.h | 2 +- .../platform/rockchip/rkisp1/rkisp1-csi.c | 7 +- .../platform/rockchip/rkisp1/rkisp1-dev.c | 12 +- .../platform/rockchip/rkisp1/rkisp1-isp.c | 8 +- .../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 | 36 +- .../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 | 28 +- drivers/media/platform/ti/omap3isp/isp.h | 15 +- drivers/media/platform/ti/omap3isp/ispccdc.c | 13 +- drivers/media/platform/ti/omap3isp/ispccp2.c | 2 + drivers/media/platform/ti/omap3isp/ispcsi2.c | 2 + .../media/platform/ti/omap3isp/ispcsiphy.c | 15 +- drivers/media/platform/video-mux.c | 10 +- drivers/media/platform/xilinx/xilinx-vipp.c | 55 +- drivers/media/v4l2-core/v4l2-async.c | 781 +++++++++++------- drivers/media/v4l2-core/v4l2-fwnode.c | 109 +-- drivers/media/v4l2-core/v4l2-subdev.c | 13 + .../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 | 6 +- 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 | 236 +++--- include/media/v4l2-fwnode.h | 68 +- include/media/v4l2-subdev.h | 12 +- 79 files changed, 1088 insertions(+), 1015 deletions(-) Tested-by: Alexander Stein #imx6q Tested-by: Philipp Zabel # imx6qp