From patchwork Tue Nov 30 14:15:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 519513 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 2550CC433EF for ; Tue, 30 Nov 2021 14:17:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242164AbhK3OUZ (ORCPT ); Tue, 30 Nov 2021 09:20:25 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:41006 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231344AbhK3OUJ (ORCPT ); Tue, 30 Nov 2021 09:20:09 -0500 Received: from deskari.lan (91-156-85-209.elisa-laajakaista.fi [91.156.85.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id CC94A1516; Tue, 30 Nov 2021 15:16:46 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1638281807; bh=s7dtmW9JDK85cD1pgXlhGTvaIKU0ldJhc/gH9TPDGr0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dzhPI/kITFQ97//b0q0nUDwtHtMvxIul/sZGLAD95tBxi7K435IN5Vb8fSWy/0rea 7mOfQXwKgRwZl7k2SwXKt37+QuV/ipkiaVIVk5325l8Jx9XJ4KQG5hmDL+5hQXI0WF SubcSsWGVAhtETxH/FBwYTxxJwb0DIDdorTwLlfo= From: Tomi Valkeinen To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com, Jacopo Mondi , Laurent Pinchart , niklas.soderlund+renesas@ragnatech.se, Mauro Carvalho Chehab , Hans Verkuil , Pratyush Yadav Cc: Tomi Valkeinen Subject: [PATCH v10 18/38] media: entity: Add an iterator helper for connected pads Date: Tue, 30 Nov 2021 16:15:16 +0200 Message-Id: <20211130141536.891878-19-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211130141536.891878-1-tomi.valkeinen@ideasonboard.com> References: <20211130141536.891878-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Sakari Ailus Add a helper macro for iterating over pads that are connected through enabled routes. This can be used to find all the connected pads within an entity, for instance starting from the pad which has been obtained during the graph walk. Signed-off-by: Sakari Ailus Reviewed-by: Niklas Söderlund - Make __media_entity_next_routed_pad() return NULL and adjust the iterator to handle that Signed-off-by: Jacopo Mondi Reviewed-by: Laurent Pinchart Signed-off-by: Tomi Valkeinen --- drivers/media/mc/mc-entity.c | 14 ++++++++++++++ include/media/media-entity.h | 27 +++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c index e963850b32df..072f017b399a 100644 --- a/drivers/media/mc/mc-entity.c +++ b/drivers/media/mc/mc-entity.c @@ -248,6 +248,20 @@ bool media_entity_has_route(struct media_entity *entity, unsigned int pad0, } EXPORT_SYMBOL_GPL(media_entity_has_route); +struct media_pad *__media_entity_next_routed_pad(struct media_pad *root, + struct media_pad *iter) +{ + struct media_entity *entity = root->entity; + + for (; iter < &entity->pads[entity->num_pads]; iter++) { + if (media_entity_has_route(entity, root->index, iter->index)) + return iter; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__media_entity_next_routed_pad); + /* push an entity to traversal stack */ static void stack_push(struct media_graph *graph, struct media_pad *pad) { diff --git a/include/media/media-entity.h b/include/media/media-entity.h index b3069eef7fdb..f90cc6417d30 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -921,6 +921,33 @@ __must_check int media_graph_walk_init( bool media_entity_has_route(struct media_entity *entity, unsigned int pad0, unsigned int pad1); +/** + * __media_entity_next_routed_pad - Get next pad connected to @root + * + * @root: The root pad to which the iterated pads have a route + * @iter: The iterator pad + * + * Get next pad which has a route to @root. + */ +struct media_pad *__media_entity_next_routed_pad(struct media_pad *root, + struct media_pad *iter); + +/** + * media_entity_for_each_routed_pad - Iterate over entity pads connected by + * routes + * + * @root: The root pad to which the iterated pads have a route + * @iter: The iterator pad + * + * Iterate over all pads of an entity which have an internal route to @root pad. + * The iteration will include the @root pad itself. + */ +#define media_entity_for_each_routed_pad(root, iter) \ + for (iter = __media_entity_next_routed_pad(root, \ + (root)->entity->pads); \ + iter != NULL; \ + iter = __media_entity_next_routed_pad(root, iter + 1)) + /** * media_graph_walk_cleanup - Release resources used by graph walk. *