From patchwork Mon Aug 30 11:01:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 504810 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 80CF8C4320A for ; Mon, 30 Aug 2021 11:02:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6AEC36112F for ; Mon, 30 Aug 2021 11:02:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236539AbhH3LDm (ORCPT ); Mon, 30 Aug 2021 07:03:42 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:43936 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236520AbhH3LDe (ORCPT ); Mon, 30 Aug 2021 07:03:34 -0400 Received: from deskari.lan (91-158-153-130.elisa-laajakaista.fi [91.158.153.130]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 2C87C156A; Mon, 30 Aug 2021 13:02:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1630321359; bh=AABiepMnXHGBVzO9AXWI5PWachgJarGqTETuT78lxGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iRXz85GtcZA8sShq+2iv0xIYs6igQhcZlYiF/s4EZRYTGzz5jPB2Pli0fsjsYJpbR P0INQ6yNHnfBup5+0iTGFT+Nr7MsAS4iYE03FJ8FAL7/xXBE9DX7v9MQ/jrCTozuH5 XgP8V0u/3xoNov38xCYxYVAT1yadDEAr8Gj9PDvI= 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 , Pratyush Yadav , Lokesh Vutla Subject: [PATCH v8 33/36] media: subdev: add "opposite" stream helper funcs Date: Mon, 30 Aug 2021 14:01:13 +0300 Message-Id: <20210830110116.488338-34-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210830110116.488338-1-tomi.valkeinen@ideasonboard.com> References: <20210830110116.488338-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add two helper functions to make dealing with streams easier: v4l2_state_find_opposite_end - given a routing table and a pad + stream, return the pad + stream on the opposite side of the subdev. v4l2_state_get_opposite_stream_format - return a pointer to the format on the pad + stream on the opposite side from the given pad + stream. Signed-off-by: Tomi Valkeinen --- drivers/media/v4l2-core/v4l2-subdev.c | 42 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 31 ++++++++++++++++++++ 2 files changed, 73 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index e8bfca595e11..68db3f23c256 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1487,3 +1487,45 @@ v4l2_state_get_stream_format(struct v4l2_subdev_state *state, unsigned int pad, return NULL; } EXPORT_SYMBOL_GPL(v4l2_state_get_stream_format); + +int v4l2_state_find_opposite_end(struct v4l2_subdev_krouting *routing, u32 pad, + u32 stream, u32 *other_pad, u32 *other_stream) +{ + unsigned int i; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + + if (route->source_pad == pad && + route->source_stream == stream) { + *other_pad = route->sink_pad; + *other_stream = route->sink_stream; + return 0; + } + + if (route->sink_pad == pad && route->sink_stream == stream) { + *other_pad = route->source_pad; + *other_stream = route->source_stream; + return 0; + } + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(v4l2_state_find_opposite_end); + +struct v4l2_mbus_framefmt * +v4l2_state_get_opposite_stream_format(struct v4l2_subdev_state *state, u32 pad, + u32 stream) +{ + u32 other_pad, other_stream; + int ret; + + ret = v4l2_state_find_opposite_end(&state->routing, pad, stream, + &other_pad, &other_stream); + if (ret) + return NULL; + + return v4l2_state_get_stream_format(state, other_pad, other_stream); +} +EXPORT_SYMBOL_GPL(v4l2_state_get_opposite_stream_format); diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 5a2c7e2cb561..bc69123f71cb 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1500,4 +1500,35 @@ struct v4l2_mbus_framefmt * v4l2_state_get_stream_format(struct v4l2_subdev_state *state, unsigned int pad, u32 stream); +/** + * v4l2_state_find_opposite_end() - Find the opposite stream + * @routing: routing used to find the opposite side + * @pad: pad id + * @stream: stream id + * @other_pad: pointer used to return the opposite pad + * @other_stream: pointer used to return the opposite stream + * + * This function uses the routing table to find the pad + stream which is + * opposite the given pad + stream. + * + * Returns 0 on success, or -EINVAL if no matching route is found. + */ +int v4l2_state_find_opposite_end(struct v4l2_subdev_krouting *routing, u32 pad, + u32 stream, u32 *other_pad, u32 *other_stream); + +/** + * v4l2_state_get_opposite_stream_format() - Get pointer to opposite stream format + * @state: subdevice state + * @pad: pad id + * @stream: stream id + * + * This returns a pointer to &struct v4l2_mbus_framefmt for the pad + stream + * that is opposite the given pad + stream in the subdev state. + * + * If the state does not contain the given pad + stream, NULL is returned. + */ +struct v4l2_mbus_framefmt * +v4l2_state_get_opposite_stream_format(struct v4l2_subdev_state *state, u32 pad, + u32 stream); + #endif