[v2,16/31] media: v4l: async: Rework internal lists

Message ID	20230516095517.611711-17-sakari.ailus@linux.intel.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-media-owner@vger.kernel.org> From: Sakari Ailus <sakari.ailus@linux.intel.com> To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, Philipp Zabel <p.zabel@pengutronix.de>, hverkuil@xs4all.nl, Francesco Dolcini <francesco@dolcini.it>, aishwarya.kothari@toradex.com, Robert Foss <rfoss@kernel.org>, Todor Tomov <todor.too@gmail.com>, Hyun Kwon <hyun.kwon@xilinx.com>, bingbu.cao@intel.com Subject: [PATCH v2 16/31] media: v4l: async: Rework internal lists Date: Tue, 16 May 2023 12:55:02 +0300 Message-Id: <20230516095517.611711-17-sakari.ailus@linux.intel.com> In-Reply-To: <20230516095517.611711-1-sakari.ailus@linux.intel.com> References: <20230516095517.611711-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Separate links and async sub-devices \| expand [v2,00/31] Separate links and async sub-devices [v2,01/31] media: v4l: async: Drop v4l2_async_nf_parse_fwnode_endpoints() [v2,02/31] media: Documentation: v4l: Document missing async subdev function [v2,03/31] media: xilinx-vipp: Clean up bound async notifier callback [v2,04/31] media: v4l: async: Add some debug prints [v2,05/31] media: v4l: async: Clean testing for duplicated async subdevs [v2,06/31] media: v4l: async: Drop unneeded list entry initialisation [v2,07/31] media: v4l: async: Don't check whether asd is NULL in validity check [v2,08/31] media: v4l: async: Make V4L2 async match information a struct [v2,09/31] media: v4l: async: Rename V4L2_ASYNC_MATCH_ macros, add TYPE_ [v2,10/31] media: v4l: async: Only pass match information for async subdev validation [v2,11/31] media: v4l: async: Clean up list heads and entries [v2,12/31] media: v4l: async: Simplify async sub-device fwnode matching [v2,13/31] media: v4l: async: Rename v4l2_async_subdev as v4l2_async_connection [v2,14/31] media: v4l: async: Clean up error handling in v4l2_async_match_notify [v2,15/31] media: v4l: async: Drop duplicate handling when adding connections [v2,16/31] media: v4l: async: Rework internal lists [v2,17/31] media: v4l: async: Obtain async connection based on sub-device [v2,18/31] media: v4l: async: Differentiate connecting and creating sub-devices [v2,19/31] media: v4l: async: Try more connections [v2,20/31] media: v4l: async: Support fwnode endpoint list matching for subdevs [v2,21/31] media: adv748x: Return to endpoint matching [v2,22/31] media: pxa_camera: Fix probe error handling [v2,23/31] media: pxa_camera: Register V4L2 device early, fix probe error handling [v2,24/31] media: marvell: cafe: Register V4L2 device earlier [v2,25/31] media: am437x-vpfe: Register V4L2 device early [v2,26/31] media: omap3isp: Initialise V4L2 async notifier later [v2,27/31] media: xilinx-vipp: Init async notifier after registering V4L2 device [v2,28/31] media: davinci: Init async notifier after registering V4L2 device [v2,29/31] media: qcom: Initialise V4L2 async notifier later [v2,30/31] media: v4l: async: Set v4l2_device in async notifier init [v2,31/31] media: Documentation: v4l: Document sub-device notifiers

diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c index 1893d1ff4f169..0f43b5e10f187 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c @@ -1420,7 +1420,7 @@ static int cio2_notifier_complete(struct v4l2_async_notifier *notifier) unsigned int pad; int ret; - list_for_each_entry(asd, &cio2->notifier.asc_list, asc_entry) { + list_for_each_entry(asd, &cio2->notifier.done_list, asc_entry) { s_asd = to_sensor_asd(asd); q = &cio2->queue[s_asd->csi2.port]; diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-core.c b/drivers/media/platform/renesas/rcar-vin/rcar-core.c index c592a1b36f638..b1c5c3878cf07 100644 --- a/drivers/media/platform/renesas/rcar-vin/rcar-core.c +++ b/drivers/media/platform/renesas/rcar-vin/rcar-core.c @@ -396,7 +396,7 @@ static int rvin_group_notifier_init(struct rvin_dev *vin, unsigned int port, } } - if (list_empty(&vin->group->notifier.asc_list)) + if (list_empty(&vin->group->notifier.waiting_list)) return 0; vin->group->notifier.ops = &rvin_group_notify_ops; diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c index 2d1093997db52..e026ed5337513 100644 --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c @@ -191,7 +191,7 @@ static int rzg2l_cru_mc_parse_of_graph(struct rzg2l_cru_dev *cru) cru->notifier.ops = &rzg2l_cru_async_ops; - if (list_empty(&cru->notifier.asc_list)) + if (list_empty(&cru->notifier.waiting_list)) return 0; ret = v4l2_async_nf_register(&cru->v4l2_dev, &cru->notifier); diff --git a/drivers/media/platform/xilinx/xilinx-vipp.c b/drivers/media/platform/xilinx/xilinx-vipp.c index 96fbbc55eb12c..a535a7584da0f 100644 --- a/drivers/media/platform/xilinx/xilinx-vipp.c +++ b/drivers/media/platform/xilinx/xilinx-vipp.c @@ -56,7 +56,7 @@ xvip_graph_find_entity(struct xvip_composite_device *xdev, struct xvip_graph_entity *entity; struct v4l2_async_connection *asd; - list_for_each_entry(asd, &xdev->notifier.asc_list, asc_entry) { + list_for_each_entry(asd, &xdev->notifier.done_list, asc_entry) { entity = to_xvip_entity(asd); if (entity->asd.match.fwnode == fwnode) return entity; @@ -291,7 +291,7 @@ static int xvip_graph_notify_complete(struct v4l2_async_notifier *notifier) dev_dbg(xdev->dev, "notify complete, all subdevs registered\n"); /* Create links for every entity. */ - list_for_each_entry(asd, &xdev->notifier.asc_list, asc_entry) { + list_for_each_entry(asd, &xdev->notifier.done_list, asc_entry) { entity = to_xvip_entity(asd); ret = xvip_graph_build_one(xdev, entity); if (ret < 0) @@ -393,7 +393,7 @@ static int xvip_graph_parse(struct xvip_composite_device *xdev) if (ret < 0) return 0; - list_for_each_entry(asd, &xdev->notifier.asc_list, asc_entry) { + list_for_each_entry(asd, &xdev->notifier.waiting_list, asc_entry) { entity = to_xvip_entity(asd); ret = xvip_graph_parse_one(xdev, entity->asd.match.fwnode); if (ret < 0) { @@ -501,7 +501,7 @@ static int xvip_graph_init(struct xvip_composite_device *xdev) goto done; } - if (list_empty(&xdev->notifier.asc_list)) { + if (list_empty(&xdev->notifier.waiting_list)) { dev_err(xdev->dev, "no subdev found in graph\n"); ret = -ENOENT; goto done; diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 62c655df9bc50..a11d6c075ad25 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -160,7 +160,7 @@ v4l2_async_find_match(struct v4l2_async_notifier *notifier, struct v4l2_async_match_desc *match); struct v4l2_async_connection *asc; - list_for_each_entry(asc, &notifier->waiting_list, waiting_entry) { + list_for_each_entry(asc, &notifier->waiting_list, asc_entry) { /* bus_type has been verified valid before */ switch (asc->match.type) { case V4L2_ASYNC_MATCH_TYPE_I2C: @@ -232,14 +232,14 @@ v4l2_async_nf_find_v4l2_dev(struct v4l2_async_notifier *notifier) static bool v4l2_async_nf_can_complete(struct v4l2_async_notifier *notifier) { - struct v4l2_subdev *sd; + struct v4l2_async_connection *asc; if (!list_empty(&notifier->waiting_list)) return false; - list_for_each_entry(sd, &notifier->done_list, async_list) { + list_for_each_entry(asc, &notifier->done_list, asc_entry) { struct v4l2_async_notifier *subdev_notifier = - v4l2_async_find_subdev_notifier(sd); + v4l2_async_find_subdev_notifier(asc->sd); if (subdev_notifier && !v4l2_async_nf_can_complete(subdev_notifier)) @@ -333,12 +333,13 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier, if (ret) goto err_call_unbind; - list_del(&asc->waiting_entry); sd->asd = asc; sd->notifier = notifier; - /* Move from the global subdevice list to notifier's done */ - list_move(&sd->async_list, &notifier->done_list); + asc->sd = sd; + + /* Move from the waiting list to notifier's done */ + list_move(&asc->asc_entry, &notifier->done_list); dev_dbg(notifier_dev(notifier), "v4l2-async: %s bound (ret %d)\n", dev_name(sd->dev), ret); @@ -422,25 +423,23 @@ static void v4l2_async_cleanup(struct v4l2_subdev *sd) /* Unbind all sub-devices in the notifier tree. */ static void -v4l2_async_nf_unbind_all_subdevs(struct v4l2_async_notifier *notifier, - bool readd) +v4l2_async_nf_unbind_all_subdevs(struct v4l2_async_notifier *notifier) { - struct v4l2_subdev *sd, *tmp; + struct v4l2_async_connection *asc, *asc_tmp; - list_for_each_entry_safe(sd, tmp, &notifier->done_list, async_list) { + list_for_each_entry_safe(asc, asc_tmp, &notifier->done_list, + asc_entry) { struct v4l2_async_notifier *subdev_notifier = - v4l2_async_find_subdev_notifier(sd); + v4l2_async_find_subdev_notifier(asc->sd); if (subdev_notifier) - v4l2_async_nf_unbind_all_subdevs(subdev_notifier, true); + v4l2_async_nf_unbind_all_subdevs(subdev_notifier); - v4l2_async_nf_call_unbind(notifier, sd, sd->asd); - if (readd) - list_add_tail(&sd->asd->waiting_entry, - &notifier->waiting_list); - v4l2_async_cleanup(sd); - - list_move(&sd->async_list, &subdev_list); + v4l2_async_nf_call_unbind(notifier, asc->sd, asc); + v4l2_async_cleanup(asc->sd); + list_move_tail(&asc->asc_entry, &notifier->waiting_list); + list_move(&asc->sd->async_list, &subdev_list); + asc->sd = NULL; } notifier->parent = NULL; @@ -452,17 +451,16 @@ v4l2_async_nf_has_async_match_entry(struct v4l2_async_notifier *notifier, struct v4l2_async_match_desc *match) { struct v4l2_async_connection *asc; - struct v4l2_subdev *sd; - list_for_each_entry(asc, &notifier->waiting_list, waiting_entry) + list_for_each_entry(asc, &notifier->waiting_list, asc_entry) if (v4l2_async_match_equal(&asc->match, match)) return true; - list_for_each_entry(sd, &notifier->done_list, async_list) { - if (WARN_ON(!sd->asd)) + list_for_each_entry(asc, &notifier->done_list, asc_entry) { + if (WARN_ON(!asc->sd->asd)) continue; - if (v4l2_async_match_equal(&sd->asd->match, match)) + if (v4l2_async_match_equal(&asc->match, match)) return true; } @@ -477,16 +475,24 @@ static bool v4l2_async_nf_has_async_match(struct v4l2_async_notifier *notifier, struct v4l2_async_match_desc *match) { - struct v4l2_async_connection *asc; + struct list_head *heads[] = { + &notifier->waiting_list, + &notifier->done_list, + }; + unsigned int i; lockdep_assert_held(&list_lock); /* Check that an asd is not being added more than once. */ - list_for_each_entry(asc, &notifier->asc_list, asc_entry) { - if (&asc->match == match) - break; - if (v4l2_async_match_equal(&asc->match, match)) - return true; + for (i = 0; i < ARRAY_SIZE(heads); i++) { + struct v4l2_async_connection *asc; + + list_for_each_entry(asc, heads[i], asc_entry) { + if (&asc->match == match) + break; + if (v4l2_async_match_equal(&asc->match, match)) + return true; + } } /* Check that an asc does not exist in other notifiers. */ @@ -521,7 +527,8 @@ static int v4l2_async_nf_match_valid(struct v4l2_async_notifier *notifier, void v4l2_async_nf_init(struct v4l2_async_notifier *notifier) { - INIT_LIST_HEAD(&notifier->asc_list); + INIT_LIST_HEAD(&notifier->waiting_list); + INIT_LIST_HEAD(&notifier->done_list); } EXPORT_SYMBOL(v4l2_async_nf_init); @@ -530,17 +537,12 @@ static int __v4l2_async_nf_register(struct v4l2_async_notifier *notifier) struct v4l2_async_connection *asc; int ret; - INIT_LIST_HEAD(&notifier->waiting_list); - INIT_LIST_HEAD(&notifier->done_list); - mutex_lock(&list_lock); - list_for_each_entry(asc, &notifier->asc_list, asc_entry) { + list_for_each_entry(asc, &notifier->waiting_list, asc_entry) { ret = v4l2_async_nf_match_valid(notifier, &asc->match); if (ret) goto err_unlock; - - list_add_tail(&asc->waiting_entry, &notifier->waiting_list); } ret = v4l2_async_nf_try_all_subdevs(notifier); @@ -562,7 +564,7 @@ static int __v4l2_async_nf_register(struct v4l2_async_notifier *notifier) /* * On failure, unbind all sub-devices registered through this notifier. */ - v4l2_async_nf_unbind_all_subdevs(notifier, false); + v4l2_async_nf_unbind_all_subdevs(notifier); err_unlock: mutex_unlock(&list_lock); @@ -612,7 +614,7 @@ __v4l2_async_nf_unregister(struct v4l2_async_notifier *notifier) if (!notifier || (!notifier->v4l2_dev && !notifier->sd)) return; - v4l2_async_nf_unbind_all_subdevs(notifier, false); + v4l2_async_nf_unbind_all_subdevs(notifier); notifier->sd = NULL; notifier->v4l2_dev = NULL; @@ -634,10 +636,12 @@ static void __v4l2_async_nf_cleanup(struct v4l2_async_notifier *notifier) { struct v4l2_async_connection *asc, *tmp; - if (!notifier || !notifier->asc_list.next) + if (!notifier || !notifier->waiting_list.next) return; - list_for_each_entry_safe(asc, tmp, &notifier->asc_list, asc_entry) { + WARN_ON(!list_empty(&notifier->done_list)); + + list_for_each_entry_safe(asc, tmp, &notifier->waiting_list, asc_entry) { switch (asc->match.type) { case V4L2_ASYNC_MATCH_TYPE_FWNODE: fwnode_handle_put(asc->match.fwnode); @@ -667,7 +671,7 @@ static int __v4l2_async_nf_add_connection(struct v4l2_async_notifier *notifier, { mutex_lock(&list_lock); - list_add_tail(&asc->asc_entry, &notifier->asc_list); + list_add_tail(&asc->asc_entry, &notifier->waiting_list); mutex_unlock(&list_lock); @@ -810,10 +814,12 @@ int v4l2_async_register_subdev(struct v4l2_subdev *sd) */ subdev_notifier = v4l2_async_find_subdev_notifier(sd); if (subdev_notifier) - v4l2_async_nf_unbind_all_subdevs(subdev_notifier, false); + v4l2_async_nf_unbind_all_subdevs(subdev_notifier); - if (sd->asd) + if (sd->asd) { v4l2_async_nf_call_unbind(notifier, sd, sd->asd); + sd->asd->sd = NULL; + } v4l2_async_cleanup(sd); mutex_unlock(&list_lock); @@ -839,9 +845,9 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd) if (sd->asd) { struct v4l2_async_notifier *notifier = sd->notifier; - list_add(&sd->asd->waiting_entry, &notifier->waiting_list); - + list_move(&sd->asd->asc_entry, &notifier->waiting_list); v4l2_async_nf_call_unbind(notifier, sd, sd->asd); + sd->asd->sd = NULL; } v4l2_async_cleanup(sd); @@ -895,7 +901,7 @@ static int pending_subdevs_show(struct seq_file *s, void *data) list_for_each_entry(notif, &notifier_list, notifier_entry) { seq_printf(s, "%s:\n", v4l2_async_nf_name(notif)); - list_for_each_entry(asc, &notif->waiting_list, waiting_entry) + list_for_each_entry(asc, &notif->waiting_list, asc_entry) print_waiting_match(s, &asc->match); } diff --git a/drivers/staging/media/imx/imx-media-dev-common.c b/drivers/staging/media/imx/imx-media-dev-common.c index c1216b4557b69..67c1b16db6558 100644 --- a/drivers/staging/media/imx/imx-media-dev-common.c +++ b/drivers/staging/media/imx/imx-media-dev-common.c @@ -384,7 +384,7 @@ int imx_media_dev_notifier_register(struct imx_media_dev *imxmd, int ret; /* no subdevs? just bail */ - if (list_empty(&imxmd->notifier.asc_list)) { + if (list_empty(&imxmd->notifier.waiting_list)) { v4l2_err(&imxmd->v4l2_dev, "no subdevs\n"); return -ENODEV; } diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c index c93e5ac9dbf0c..146b4fd3c8b52 100644 --- a/drivers/staging/media/tegra-video/vi.c +++ b/drivers/staging/media/tegra-video/vi.c @@ -1565,7 +1565,7 @@ tegra_vi_graph_find_entity(struct tegra_vi_channel *chan, struct tegra_vi_graph_entity *entity; struct v4l2_async_connection *asd; - list_for_each_entry(asd, &chan->notifier.asc_list, asc_entry) { + list_for_each_entry(asd, &chan->notifier.done_list, asc_entry) { entity = to_tegra_vi_graph_entity(asd); if (entity->asd.match.fwnode == fwnode) return entity; @@ -1709,7 +1709,7 @@ static int tegra_vi_graph_notify_complete(struct v4l2_async_notifier *notifier) } /* create links between the entities */ - list_for_each_entry(asd, &chan->notifier.asc_list, asc_entry) { + list_for_each_entry(asd, &chan->notifier.done_list, asc_entry) { entity = to_tegra_vi_graph_entity(asd); ret = tegra_vi_graph_build(chan, entity); if (ret < 0) @@ -1876,7 +1876,7 @@ static int tegra_vi_graph_init(struct tegra_vi *vi) ret = tegra_vi_graph_parse_one(chan, remote); fwnode_handle_put(remote); - if (ret < 0 || list_empty(&chan->notifier.asc_list)) + if (ret < 0 || list_empty(&chan->notifier.waiting_list)) continue; chan->notifier.ops = &tegra_vi_async_ops; diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index 38d9d097fdb52..56b7238e2cbe2 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -66,9 +66,8 @@ struct v4l2_async_match_desc { * * @match: struct of match type and per-bus type matching data sets * @asc_entry: used to add struct v4l2_async_connection objects to the - * master notifier @asc_list - * @waiting_entry: used to link struct v4l2_async_connection objects, waiting to - * be probed, to a notifier->waiting_list list + * notifier @waiting_list or @done_list + * @sd: the related sub-device * * When this struct is used as a member in a driver specific struct, * the driver specific struct shall contain the &struct @@ -77,7 +76,7 @@ struct v4l2_async_match_desc { struct v4l2_async_connection { struct v4l2_async_match_desc match; struct list_head asc_entry; - struct list_head waiting_entry; + struct v4l2_subdev *sd; }; /** @@ -106,7 +105,6 @@ struct v4l2_async_notifier_operations { * @v4l2_dev: v4l2_device of the root notifier, NULL otherwise * @sd: sub-device that registered the notifier, NULL otherwise * @parent: parent notifier - * @asc_list: master list of struct v4l2_async_subdev * @waiting_list: list of struct v4l2_async_subdev, waiting for their drivers * @done_list: list of struct v4l2_subdev, already probed * @notifier_entry: member in a global list of notifiers @@ -116,7 +114,6 @@ struct v4l2_async_notifier { struct v4l2_device *v4l2_dev; struct v4l2_subdev *sd; struct v4l2_async_notifier *parent; - struct list_head asc_list; struct list_head waiting_list; struct list_head done_list; struct list_head notifier_entry;

[v2,16/31] media: v4l: async: Rework internal lists

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Patch