From patchwork Thu Nov 1 23:31:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Niklas_S=C3=B6derlund?= X-Patchwork-Id: 10664693 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DDDD23E9D for ; Thu, 1 Nov 2018 23:32:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CCF602C554 for ; Thu, 1 Nov 2018 23:32:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C0FB32C4D2; Thu, 1 Nov 2018 23:32:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1948A2C554 for ; Thu, 1 Nov 2018 23:32:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728204AbeKBIhz (ORCPT ); Fri, 2 Nov 2018 04:37:55 -0400 Received: from bin-mail-out-06.binero.net ([195.74.38.229]:27882 "EHLO bin-mail-out-06.binero.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728153AbeKBIhz (ORCPT ); Fri, 2 Nov 2018 04:37:55 -0400 X-Halon-ID: 6d0e39b1-de2e-11e8-9adf-005056917a89 Authorized-sender: niklas@soderlund.pp.se Received: from bismarck.berto.se (unknown [89.233.230.99]) by bin-vsp-out-01.atm.binero.net (Halon) with ESMTPA id 6d0e39b1-de2e-11e8-9adf-005056917a89; Fri, 02 Nov 2018 00:32:41 +0100 (CET) From: =?utf-8?q?Niklas_S=C3=B6derlund?= To: Laurent Pinchart , Sakari Ailus , Benoit Parrot , linux-media@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org Subject: [PATCH v2 02/30] media: entity: Use pads instead of entities in the media graph walk stack Date: Fri, 2 Nov 2018 00:31:16 +0100 Message-Id: <20181101233144.31507-3-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181101233144.31507-1-niklas.soderlund+renesas@ragnatech.se> References: <20181101233144.31507-1-niklas.soderlund+renesas@ragnatech.se> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Sakari Ailus Change the media graph walk stack structure to use media pads instead of using media entities. In addition to the entity, the pad contains the information which pad in the entity are being dealt with. Signed-off-by: Sakari Ailus Reviewed-by: Niklas Söderlund Reviewed-by: Laurent Pinchart --- drivers/media/media-entity.c | 53 ++++++++++++++++++------------------ include/media/media-entity.h | 6 ++-- 2 files changed, 29 insertions(+), 30 deletions(-) diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index 2bbc07de71aa5e6d..892e64a0a9d8ec42 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -237,40 +237,39 @@ EXPORT_SYMBOL_GPL(media_entity_pads_init); * Graph traversal */ -static struct media_entity * -media_entity_other(struct media_entity *entity, struct media_link *link) +static struct media_pad * +media_entity_other(struct media_pad *pad, struct media_link *link) { - if (link->source->entity == entity) - return link->sink->entity; + if (link->source == pad) + return link->sink; else - return link->source->entity; + return link->source; } /* push an entity to traversal stack */ -static void stack_push(struct media_graph *graph, - struct media_entity *entity) +static void stack_push(struct media_graph *graph, struct media_pad *pad) { if (graph->top == MEDIA_ENTITY_ENUM_MAX_DEPTH - 1) { WARN_ON(1); return; } graph->top++; - graph->stack[graph->top].link = entity->links.next; - graph->stack[graph->top].entity = entity; + graph->stack[graph->top].link = pad->entity->links.next; + graph->stack[graph->top].pad = pad; } -static struct media_entity *stack_pop(struct media_graph *graph) +static struct media_pad *stack_pop(struct media_graph *graph) { - struct media_entity *entity; + struct media_pad *pad; - entity = graph->stack[graph->top].entity; + pad = graph->stack[graph->top].pad; graph->top--; - return entity; + return pad; } #define link_top(en) ((en)->stack[(en)->top].link) -#define stack_top(en) ((en)->stack[(en)->top].entity) +#define stack_top(en) ((en)->stack[(en)->top].pad) /** * media_graph_walk_init - Allocate resources for graph walk @@ -306,8 +305,8 @@ void media_graph_walk_start(struct media_graph *graph, struct media_pad *pad) media_entity_enum_set(&graph->ent_enum, pad->entity); graph->top = 0; - graph->stack[graph->top].entity = NULL; - stack_push(graph, pad->entity); + graph->stack[graph->top].pad = NULL; + stack_push(graph, pad); dev_dbg(pad->graph_obj.mdev->dev, "begin graph walk at '%s':%u\n", pad->entity->name, pad->index); } @@ -315,16 +314,16 @@ EXPORT_SYMBOL_GPL(media_graph_walk_start); static void media_graph_walk_iter(struct media_graph *graph) { - struct media_entity *entity = stack_top(graph); + struct media_pad *pad = stack_top(graph); struct media_link *link; - struct media_entity *next; + struct media_pad *next; link = list_entry(link_top(graph), typeof(*link), list); /* The link is not enabled so we do not follow. */ if (!(link->flags & MEDIA_LNK_FL_ENABLED)) { link_top(graph) = link_top(graph)->next; - dev_dbg(entity->graph_obj.mdev->dev, + dev_dbg(pad->graph_obj.mdev->dev, "walk: skipping disabled link '%s':%u -> '%s':%u\n", link->source->entity->name, link->source->index, link->sink->entity->name, link->sink->index); @@ -332,22 +331,22 @@ static void media_graph_walk_iter(struct media_graph *graph) } /* Get the entity in the other end of the link . */ - next = media_entity_other(entity, link); + next = media_entity_other(pad, link); /* Has the entity already been visited? */ - if (media_entity_enum_test_and_set(&graph->ent_enum, next)) { + if (media_entity_enum_test_and_set(&graph->ent_enum, next->entity)) { link_top(graph) = link_top(graph)->next; - dev_dbg(entity->graph_obj.mdev->dev, + dev_dbg(pad->graph_obj.mdev->dev, "walk: skipping entity '%s' (already seen)\n", - next->name); + next->entity->name); return; } /* Push the new entity to stack and start over. */ link_top(graph) = link_top(graph)->next; stack_push(graph, next); - dev_dbg(entity->graph_obj.mdev->dev, "walk: pushing '%s' on stack\n", - next->name); + dev_dbg(next->graph_obj.mdev->dev, "walk: pushing '%s':%u on stack\n", + next->entity->name, next->index); } struct media_entity *media_graph_walk_next(struct media_graph *graph) @@ -362,10 +361,10 @@ struct media_entity *media_graph_walk_next(struct media_graph *graph) * top of the stack until no more entities on the level can be * found. */ - while (link_top(graph) != &stack_top(graph)->links) + while (link_top(graph) != &stack_top(graph)->entity->links) media_graph_walk_iter(graph); - entity = stack_pop(graph); + entity = stack_pop(graph)->entity; dev_dbg(entity->graph_obj.mdev->dev, "walk: returning entity '%s'\n", entity->name); diff --git a/include/media/media-entity.h b/include/media/media-entity.h index 07ab141e739ef5ff..99c7606f01317741 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -86,16 +86,16 @@ struct media_entity_enum { * struct media_graph - Media graph traversal state * * @stack: Graph traversal stack; the stack contains information - * on the path the media entities to be walked and the + * on the path the media pads to be walked and the * links through which they were reached. - * @stack.entity: pointer to &struct media_entity at the graph. + * @stack.pad: pointer to &struct media_pad at the graph. * @stack.link: pointer to &struct list_head. * @ent_enum: Visited entities * @top: The top of the stack */ struct media_graph { struct { - struct media_entity *entity; + struct media_pad *pad; struct list_head *link; } stack[MEDIA_ENTITY_ENUM_MAX_DEPTH];