[v6,01/24] media: entity: Use pad as a starting point for graph walk

Message ID	20210427124523.990938-2-tomi.valkeinen@ideasonboard.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-media-owner@kernel.org> From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com, Jacopo Mondi <jacopo+renesas@jmondi.org>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, niklas.soderlund+renesas@ragnatech.se Cc: Mauro Carvalho Chehab <mchehab@kernel.org>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Subject: [PATCH v6 01/24] media: entity: Use pad as a starting point for graph walk Date: Tue, 27 Apr 2021 15:45:00 +0300 Message-Id: <20210427124523.990938-2-tomi.valkeinen@ideasonboard.com> In-Reply-To: <20210427124523.990938-1-tomi.valkeinen@ideasonboard.com> References: <20210427124523.990938-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	v4l: subdev internal routing \| expand [v6,00/24] v4l: subdev internal routing [v6,01/24] media: entity: Use pad as a starting point for graph walk [v6,02/24] media: entity: Use pads instead of entities in the media graph walk stack [v6,03/24] media: entity: Walk the graph based on pads [v6,04/24] v4l: mc: Start walk from a specific pad in use count calculation [v6,05/24] media: entity: Add iterator helper for entity pads [v6,06/24] media: entity: Move the pipeline from entity to pads [v6,07/24] media: entity: Use pad as the starting point for a pipeline [v6,08/24] media: entity: Add has_route entity operation [v6,09/24] media: entity: Add media_entity_has_route() function [v6,10/24] media: entity: Use routing information during graph traversal [v6,11/24] media: entity: Skip link validation for pads to which there is no route to [v6,12/24] media: entity: Add an iterator helper for connected pads [v6,13/24] media: entity: Add only connected pads to the pipeline [v6,14/24] media: entity: Add debug information in graph walk route check [v6,15/24] v4l: Add bus type to frame descriptors [v6,16/24] v4l: Add CSI-2 bus configuration to frame descriptors [v6,17/24] v4l: Add stream to frame descriptor [v6,18/24] v4l: subdev: Add [GS]_ROUTING subdev ioctls and operations [v6,19/24] media: Documentation: Add GS_ROUTING documentation [v6,20/24] v4l: subdev: routing kernel helper functions [v6,21/24] v4l: subdev: add v4l2_subdev_get_format_dir() [v6,22/24] media: uapi: add MEDIA_PAD_FL_MULTIPLEXED flag [v6,23/24] v4l: subdev: Take routing information into account in link validation [v6,24/24] v4l: subdev: increase V4L2_FRAME_DESC_ENTRY_MAX to 8

diff --git a/Documentation/driver-api/media/mc-core.rst b/Documentation/driver-api/media/mc-core.rst index 57b5bbba944e..ba0aee982124 100644 --- a/Documentation/driver-api/media/mc-core.rst +++ b/Documentation/driver-api/media/mc-core.rst @@ -167,7 +167,7 @@ Drivers initiate a graph traversal by calling :c:func:`media_graph_walk_start()` The graph structure, provided by the caller, is initialized to start graph -traversal at the given entity. +traversal at the given pad in an entity. Drivers can then retrieve the next entity by calling :c:func:`media_graph_walk_next()` diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c index 12b45e669bcc..459a5bb4ab41 100644 --- a/drivers/media/mc/mc-entity.c +++ b/drivers/media/mc/mc-entity.c @@ -291,17 +291,16 @@ void media_graph_walk_cleanup(struct media_graph *graph) } EXPORT_SYMBOL_GPL(media_graph_walk_cleanup); -void media_graph_walk_start(struct media_graph *graph, - struct media_entity *entity) +void media_graph_walk_start(struct media_graph *graph, struct media_pad *pad) { media_entity_enum_zero(&graph->ent_enum); - media_entity_enum_set(&graph->ent_enum, entity); + media_entity_enum_set(&graph->ent_enum, pad->entity); graph->top = 0; graph->stack[graph->top].entity = NULL; - stack_push(graph, entity); - dev_dbg(entity->graph_obj.mdev->dev, - "begin graph walk at '%s'\n", entity->name); + stack_push(graph, pad->entity); + dev_dbg(pad->graph_obj.mdev->dev, + "begin graph walk at '%s':%u\n", pad->entity->name, pad->index); } EXPORT_SYMBOL_GPL(media_graph_walk_start); @@ -419,7 +418,7 @@ __must_check int __media_pipeline_start(struct media_entity *entity, goto error_graph_walk_start; } - media_graph_walk_start(&pipe->graph, entity); + media_graph_walk_start(&pipe->graph, entity->pads); while ((entity = media_graph_walk_next(graph))) { DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS); @@ -503,7 +502,7 @@ __must_check int __media_pipeline_start(struct media_entity *entity, * Link validation on graph failed. We revert what we did and * return the error. */ - media_graph_walk_start(graph, entity_err); + media_graph_walk_start(graph, entity_err->pads); while ((entity_err = media_graph_walk_next(graph))) { /* Sanity check for negative stream_count */ @@ -554,7 +553,7 @@ void __media_pipeline_stop(struct media_entity *entity) if (WARN_ON(!pipe)) return; - media_graph_walk_start(graph, entity); + media_graph_walk_start(graph, entity->pads); while ((entity = media_graph_walk_next(graph))) { /* Sanity check for negative stream_count */ diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c index 13d192ba4aa6..d90663b65932 100644 --- a/drivers/media/platform/exynos4-is/media-dev.c +++ b/drivers/media/platform/exynos4-is/media-dev.c @@ -1175,7 +1175,7 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable, * through active links. This is needed as we cannot power on/off the * subdevs in random order. */ - media_graph_walk_start(graph, entity); + media_graph_walk_start(graph, entity->pads); while ((entity = media_graph_walk_next(graph))) { if (!is_media_entity_v4l2_video_device(entity)) @@ -1190,7 +1190,7 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable, return 0; err: - media_graph_walk_start(graph, entity_err); + media_graph_walk_start(graph, entity_err->pads); while ((entity_err = media_graph_walk_next(graph))) { if (!is_media_entity_v4l2_video_device(entity_err)) diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c index 8811d6dd4ee7..3c1485d59404 100644 --- a/drivers/media/platform/omap3isp/ispvideo.c +++ b/drivers/media/platform/omap3isp/ispvideo.c @@ -234,7 +234,7 @@ static int isp_video_get_graph_data(struct isp_video *video, return ret; } - media_graph_walk_start(&graph, entity); + media_graph_walk_start(&graph, entity->pads); while ((entity = media_graph_walk_next(&graph))) { struct isp_video *__video; diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c index 044eb5778820..61e4fbaba7b7 100644 --- a/drivers/media/platform/vsp1/vsp1_video.c +++ b/drivers/media/platform/vsp1/vsp1_video.c @@ -569,7 +569,7 @@ static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe, if (ret) return ret; - media_graph_walk_start(&graph, entity); + media_graph_walk_start(&graph, entity->pads); while ((entity = media_graph_walk_next(&graph))) { struct v4l2_subdev *subdev; diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c index 2a56201cb853..d64c3bee8b95 100644 --- a/drivers/media/platform/xilinx/xilinx-dma.c +++ b/drivers/media/platform/xilinx/xilinx-dma.c @@ -190,7 +190,7 @@ static int xvip_pipeline_validate(struct xvip_pipeline *pipe, return ret; } - media_graph_walk_start(&graph, entity); + media_graph_walk_start(&graph, entity->pads); while ((entity = media_graph_walk_next(&graph))) { struct xvip_dma *dma; diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c index b01474717dca..d215fe31b9a2 100644 --- a/drivers/media/v4l2-core/v4l2-mc.c +++ b/drivers/media/v4l2-core/v4l2-mc.c @@ -436,7 +436,7 @@ static int pipeline_pm_use_count(struct media_entity *entity, { int use = 0; - media_graph_walk_start(graph, entity); + media_graph_walk_start(graph, entity->pads); while ((entity = media_graph_walk_next(graph))) { if (is_media_entity_v4l2_video_device(entity)) @@ -499,7 +499,7 @@ static int pipeline_pm_power(struct media_entity *entity, int change, if (!change) return 0; - media_graph_walk_start(graph, entity); + media_graph_walk_start(graph, entity->pads); while (!ret && (entity = media_graph_walk_next(graph))) if (is_media_entity_v4l2_subdev(entity)) @@ -508,7 +508,7 @@ static int pipeline_pm_power(struct media_entity *entity, int change, if (!ret) return ret; - media_graph_walk_start(graph, first); + media_graph_walk_start(graph, first->pads); while ((first = media_graph_walk_next(graph)) && first != entity) diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c index 66975a37dc85..77bf1b8a56f7 100644 --- a/drivers/staging/media/omap4iss/iss_video.c +++ b/drivers/staging/media/omap4iss/iss_video.c @@ -217,7 +217,7 @@ iss_video_far_end(struct iss_video *video) return NULL; } - media_graph_walk_start(&graph, entity); + media_graph_walk_start(&graph, entity->pads); while ((entity = media_graph_walk_next(&graph))) { if (entity == &video->video.entity) @@ -890,7 +890,7 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) if (ret < 0) goto err_media_pipeline_start; - media_graph_walk_start(&graph, entity); + media_graph_walk_start(&graph, entity->pads); while ((entity = media_graph_walk_next(&graph))) media_entity_enum_set(&pipe->ent_enum, entity); diff --git a/include/media/media-entity.h b/include/media/media-entity.h index cbdfcb79d0d0..83c4fd93f349 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -897,22 +897,20 @@ __must_check int media_graph_walk_init( void media_graph_walk_cleanup(struct media_graph *graph); /** - * media_graph_walk_start - Start walking the media graph at a - * given entity + * media_graph_walk_start - Start walking the media graph at a given pad * * @graph: Media graph structure that will be used to walk the graph - * @entity: Starting entity + * @pad: Starting pad * * Before using this function, media_graph_walk_init() must be * used to allocate resources used for walking the graph. This * function initializes the graph traversal structure to walk the - * entities graph starting at the given entity. The traversal + * entities graph starting at the given pad. The traversal * structure must not be modified by the caller during graph * traversal. After the graph walk, the resources must be released * using media_graph_walk_cleanup(). */ -void media_graph_walk_start(struct media_graph *graph, - struct media_entity *entity); +void media_graph_walk_start(struct media_graph *graph, struct media_pad *pad); /** * media_graph_walk_next - Get the next entity in the graph

[v6,01/24] media: entity: Use pad as a starting point for graph walk

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