From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0241C433F5 for ; Tue, 5 Oct 2021 08:58:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA6B16120F for ; Tue, 5 Oct 2021 08:58:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233693AbhJEJAj (ORCPT ); Tue, 5 Oct 2021 05:00:39 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:60730 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233683AbhJEJAh (ORCPT ); Tue, 5 Oct 2021 05:00:37 -0400 Received: from deskari.lan (91-158-153-130.elisa-laajakaista.fi [91.158.153.130]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id BA65FE1E; Tue, 5 Oct 2021 10:58:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1633424326; bh=L1dwAzUygB+rvSRT7PZu9Hb5Oy2qnZlT00CugNqjS9E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tZ331Eb8Eq4ceJAucvQLakfw7chZ9ra/MtZVvDzuCwy4TFEqdE5HX9tdpf5DVJyOh ZuraPrOXIoPyhbCdNr721pYD1rHlAnFoGpVd4dGfDYg0dOzBQB4c1Lbt75PMGDXvf2 rPdO4w64xvv0Ejv2qNK6Nme8L27ONkW85KXfmMc0= 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 Subject: [PATCH v9 36/36] media: subdev: add v4l2_routing_simple_verify() helper Date: Tue, 5 Oct 2021 11:57:50 +0300 Message-Id: <20211005085750.138151-37-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211005085750.138151-1-tomi.valkeinen@ideasonboard.com> References: <20211005085750.138151-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add a helper for verifying routing for the common case of non-overlapping 1-to-1 streams. Signed-off-by: Tomi Valkeinen --- drivers/media/v4l2-core/v4l2-subdev.c | 24 ++++++++++++++++++++++++ include/media/v4l2-subdev.h | 14 ++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 22a9bea0fa85..2a64ff003e4b 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1569,3 +1569,27 @@ int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, return 0; } EXPORT_SYMBOL_GPL(v4l2_subdev_get_fmt); + +int v4l2_routing_simple_verify(const struct v4l2_subdev_krouting *routing) +{ + unsigned int i, j; + + for (i = 0; i < routing->num_routes; ++i) { + const struct v4l2_subdev_route *route = &routing->routes[i]; + + for (j = i + 1; j < routing->num_routes; ++j) { + const struct v4l2_subdev_route *r = &routing->routes[j]; + + if (route->sink_pad == r->sink_pad && + route->sink_stream == r->sink_stream) + return -EINVAL; + + if (route->source_pad == r->source_pad && + route->source_stream == r->source_stream) + return -EINVAL; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_routing_simple_verify); diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 1a4df0aafe8a..5e50f2ded653 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1565,4 +1565,18 @@ v4l2_state_get_opposite_stream_format(struct v4l2_subdev_state *state, u32 pad, int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_format *format); +/** + * v4l2_routing_simple_verify() - Verify that all streams are non-overlapping + * 1-to-1 streams + * @routing: routing to verify + * + * This verifies that the given routing contains only non-overlapping 1-to-1 + * streams. In other words, no two streams have the same source or sink + * stream ID on a single pad. This is the most common case of routing + * supported by devices. + * + * Returns 0 on success, error value otherwise. + */ +int v4l2_routing_simple_verify(const struct v4l2_subdev_krouting *routing); + #endif -- 2.25.1