From patchwork Tue Nov 30 14:15:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 519505 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 B8455C4332F for ; Tue, 30 Nov 2021 14:17:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242175AbhK3OUi (ORCPT ); Tue, 30 Nov 2021 09:20:38 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:41004 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242128AbhK3OUT (ORCPT ); Tue, 30 Nov 2021 09:20:19 -0500 Received: from deskari.lan (91-156-85-209.elisa-laajakaista.fi [91.156.85.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 7999C3527; Tue, 30 Nov 2021 15:16:59 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1638281820; bh=IcgowDqEyiYUjutx7kWHD8Heq5EHz4xcWnRp1SfIqog=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wyiw3jYhZS+RjdtHbLlw5wMSbuhFwndsEZyrjfrG6MpE2zAQblVwvOUJp/KnX2p4i 0GwTMgeDGXTJg+4g69nDOdFwa55C/wowKLbgKahgr3ZVxNQzAhmnyVjcaBWdri0DK6 Dw1YE6fU12sODxqZn2XetW6HSLfy4SLeJ6+JLofo= 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 34/38] media: subdev: add "opposite" stream helper funcs Date: Tue, 30 Nov 2021 16:15:32 +0200 Message-Id: <20211130141536.891878-35-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 Add two helper functions to make dealing with streams easier: v4l2_subdev_routing_find_opposite_end - given a routing table and a pad + stream, return the pad + stream on the opposite side of the subdev. v4l2_subdev_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 Reviewed-by: Hans Verkuil --- drivers/media/v4l2-core/v4l2-subdev.c | 47 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 36 ++++++++++++++++++++ 2 files changed, 83 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 5245ec219ee1..13a092442cd4 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1489,3 +1489,50 @@ 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_subdev_routing_find_opposite_end(const 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) { + if (other_pad) + *other_pad = route->sink_pad; + if (other_stream) + *other_stream = route->sink_stream; + return 0; + } + + if (route->sink_pad == pad && route->sink_stream == stream) { + if (other_pad) + *other_pad = route->source_pad; + if (other_stream) + *other_stream = route->source_stream; + return 0; + } + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_routing_find_opposite_end); + +struct v4l2_mbus_framefmt * +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, + u32 pad, u32 stream) +{ + u32 other_pad, other_stream; + int ret; + + ret = v4l2_subdev_routing_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_subdev_state_get_opposite_stream_format); diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 7d7ef36e2597..b1761da83533 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1503,4 +1503,40 @@ struct v4l2_mbus_framefmt * v4l2_state_get_stream_format(struct v4l2_subdev_state *state, unsigned int pad, u32 stream); +/** + * v4l2_subdev_routing_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. + * + * @other_pad and/or @other_stream can be NULL if the caller does not need the + * value. + * + * Returns 0 on success, or -EINVAL if no matching route is found. + */ +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, + u32 pad, u32 stream, u32 *other_pad, + u32 *other_stream); + +/** + * v4l2_subdev_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_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, + u32 pad, u32 stream); + #endif