From patchwork Wed Jul 27 10:36:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 593933 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 5F638C04A68 for ; Wed, 27 Jul 2022 10:37:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232030AbiG0Kha (ORCPT ); Wed, 27 Jul 2022 06:37:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232005AbiG0Kh2 (ORCPT ); Wed, 27 Jul 2022 06:37:28 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3215F474E8 for ; Wed, 27 Jul 2022 03:37:26 -0700 (PDT) Received: from deskari.lan (91-158-154-79.elisa-laajakaista.fi [91.158.154.79]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 1F290D37; Wed, 27 Jul 2022 12:37:11 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1658918231; bh=4mBfHIaDpJMPHCo3RVY1gKTO7ynybTbPolstUGT2ndE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PP5XDzuNGWtWF/x1aouAqABThNvQ92DU3oN9Bun5InYhE+ySujzjSIb8CsX0iutVB xSZQkKQI4EFORPPRwIwP5WifxY924p8dLbhzK8XT0/AWw48Zs1PRNU5v7Xt39rE0ah ZtTX2/nyp3daNL29S46P34veA5NubX/l8keWuXG4= 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 , Kishon Vijay Abraham , satish.nagireddy@getcruise.com, Tomasz Figa Cc: Tomi Valkeinen , Jacopo Mondi Subject: [PATCH v12 19/30] media: subdev: add "opposite" stream helper funcs Date: Wed, 27 Jul 2022 13:36:28 +0300 Message-Id: <20220727103639.581567-20-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220727103639.581567-1-tomi.valkeinen@ideasonboard.com> References: <20220727103639.581567-1-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 Reviewed-by: Jacopo Mondi --- drivers/media/v4l2-core/v4l2-subdev.c | 48 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 36 ++++++++++++++++++++ 2 files changed, 84 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 7ca2337ca8d3..0dd612f09f35 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1558,6 +1558,54 @@ v4l2_subdev_state_get_stream_compose(struct v4l2_subdev_state *state, } EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_stream_compose); +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_subdev_state_get_stream_format(state, other_pad, + other_stream); +} +EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_opposite_stream_format); + #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ #endif /* CONFIG_MEDIA_CONTROLLER */ diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 6d177fc609f7..69831967fb6f 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1502,6 +1502,42 @@ struct v4l2_rect * v4l2_subdev_state_get_stream_compose(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 /* CONFIG_VIDEO_V4L2_SUBDEV_API */ #endif /* CONFIG_MEDIA_CONTROLLER */