From patchwork Thu Apr 15 13:04:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 12205425 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 74D2AC43460 for ; Thu, 15 Apr 2021 13:05:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56686613B4 for ; Thu, 15 Apr 2021 13:05:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233098AbhDONFv (ORCPT ); Thu, 15 Apr 2021 09:05:51 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:46132 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233096AbhDONFu (ORCPT ); Thu, 15 Apr 2021 09:05:50 -0400 Received: from deskari.lan (91-157-208-71.elisa-laajakaista.fi [91.157.208.71]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id DD20189A; Thu, 15 Apr 2021 15:05:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1618491927; bh=7TUiN8wSn9bkB9qFYZKbph7srm2sf/NcAksCY77Wi6A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EyjS+e9KHXHNbydPTit/DvYomDbC89XZ5FiS9aheZE+c5FAB9pqZwlsld2N6HH2LY dgNATLQnEsnxnDS7GLoIoiJ8aGbGkqJuyfmf5hEoxY7csjwK5QEeTphawu3/Q8PRAA K/LiFCSa9BXtKxQ2KFYfIwLh89dvLFTuTIa+f34g= From: Tomi Valkeinen To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com, Jacopo Mondi , Laurent Pinchart , niklas.soderlund+renesas@ragnatech.se Cc: Mauro Carvalho Chehab , Hans Verkuil , Tomi Valkeinen Subject: [PATCH v5 22/24] v4l: subdev: add v4l2_subdev_get_format_dir() Date: Thu, 15 Apr 2021 16:04:48 +0300 Message-Id: <20210415130450.421168-23-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210415130450.421168-1-tomi.valkeinen@ideasonboard.com> References: <20210415130450.421168-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add v4l2_subdev_get_format_dir() which can be used to find subdev format for a specific stream on a multiplexed pad. The function will follow the routes and links until it finds a non-multiplexed pad. Signed-off-by: Tomi Valkeinen --- drivers/media/v4l2-core/v4l2-subdev.c | 96 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 26 ++++++++ 2 files changed, 122 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 7a4f71d8c6c3..430dbdaab080 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -998,6 +998,102 @@ bool v4l2_subdev_has_route(struct v4l2_subdev_krouting *routing, } EXPORT_SYMBOL_GPL(v4l2_subdev_has_route); +int v4l2_subdev_get_format_dir(struct media_pad *pad, u16 stream, + enum v4l2_direction dir, + struct v4l2_subdev_format *fmt) +{ + struct device *dev = pad->entity->graph_obj.mdev->dev; + int ret; + int i; + + dev_dbg(dev, "%s '%s':%u:%u %s\n", __func__, + pad->entity->name, pad->index, stream, + dir == V4L2_DIR_SOURCEWARD ? "sourceward" : "sinkward"); + + while (true) { + struct v4l2_subdev_krouting routing; + struct v4l2_subdev_route *route; + + if (pad->entity->obj_type != MEDIA_ENTITY_TYPE_V4L2_SUBDEV) + return -EINVAL; + + ret = v4l2_subdev_link_validate_get_format(pad, fmt); + if (ret == 0) + return 0; + else if (ret != -ENOIOCTLCMD) + return ret; + + if (pad->flags & + (dir == V4L2_DIR_SINKWARD ? MEDIA_PAD_FL_SOURCE : + MEDIA_PAD_FL_SINK)) { + pad = media_entity_remote_pad(pad); + + if (!pad) + return -EINVAL; + + if (pad->entity->obj_type != MEDIA_ENTITY_TYPE_V4L2_SUBDEV) + return -EINVAL; + + ret = v4l2_subdev_link_validate_get_format(pad, fmt); + if (ret == 0) + return 0; + else if (ret != -ENOIOCTLCMD) + return ret; + } + + ret = v4l2_subdev_get_krouting(media_entity_to_v4l2_subdev(pad->entity), &routing); + if (ret) + return ret; + + route = NULL; + for (i = 0; i < routing.num_routes; ++i) { + u16 near_pad = dir == V4L2_DIR_SINKWARD ? + routing.routes[i].sink_pad : + routing.routes[i].source_pad; + u16 near_stream = dir == V4L2_DIR_SINKWARD ? + routing.routes[i].sink_stream : + routing.routes[i].source_stream; + + if (!(routing.routes[i].flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) + continue; + + if (near_pad != pad->index) + continue; + + if (near_stream != stream) + continue; + + if (route) { + dev_err(dev, + "%s: '%s' has multiple active routes for stream %u\n", + __func__, pad->entity->name, stream); + v4l2_subdev_free_routing(&routing); + return -EINVAL; + } + + route = &routing.routes[i]; + } + + if (!route) { + dev_err(dev, "%s: no route found in '%s' for stream %u\n", + __func__, pad->entity->name, stream); + v4l2_subdev_free_routing(&routing); + return -EINVAL; + } + + if (dir == V4L2_DIR_SINKWARD) { + pad = &pad->entity->pads[route->source_pad]; + stream = route->source_stream; + } else { + pad = &pad->entity->pads[route->sink_pad]; + stream = route->sink_stream; + } + + v4l2_subdev_free_routing(&routing); + } +} +EXPORT_SYMBOL_GPL(v4l2_subdev_get_format_dir); + int v4l2_subdev_link_validate(struct media_link *link) { struct v4l2_subdev *sink; diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 1843b77dd843..730631f9a091 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1239,4 +1239,30 @@ void v4l2_subdev_cpy_routing(struct v4l2_subdev_krouting *dst, bool v4l2_subdev_has_route(struct v4l2_subdev_krouting *routing, unsigned int pad0, unsigned int pad1); +/** + * enum v4l2_direction - Direction either towards the source or the sink + * + * @V4L2_DIR_SOURCEWARD: Direction towards the source. + * @V4L2_DIR_SINKWARD: Direction towards the sink. + */ +enum v4l2_direction { + V4L2_DIR_SOURCEWARD, + V4L2_DIR_SINKWARD, +}; + +/** + * v4l2_subdev_get_format_dir() - Find format by following streams + * @pad: The pad from which to start the search + * @stream: The stream for which we want to find the format + * @dir: The direction of the search + * @fmt: Pointer to &struct v4l2_subdev_format where the found format is stored + * + * This function attempts to find v4l2_subdev_format for a specific stream on a + * multiplexed pad by following the stream using routes and links to the specified + * direction, until a non-multiplexed pad is found. + */ +int v4l2_subdev_get_format_dir(struct media_pad *pad, u16 stream, + enum v4l2_direction dir, + struct v4l2_subdev_format *fmt); + #endif