From patchwork Mon May 24 10:44:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 447656 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, 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 CC6D9C2B9F7 for ; Mon, 24 May 2021 10:44:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AEEAD610A5 for ; Mon, 24 May 2021 10:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232517AbhEXKqX (ORCPT ); Mon, 24 May 2021 06:46:23 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:60880 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232684AbhEXKqO (ORCPT ); Mon, 24 May 2021 06:46:14 -0400 Received: from deskari.lan (91-157-208-71.elisa-laajakaista.fi [91.157.208.71]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 3D9E617C6; Mon, 24 May 2021 12:44:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1621853086; bh=bxKq3bwr+jHLPWImDfes9V8Rbc0x8PR//0MsVrKLtz4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WNWwPC+CYSRleRmzoMJmqbWdkLqOJ9LKeOQNIrx3a3Lu/9navRUhf9jugJc9TuSGU IR6c/FvDq/XT+h0a7du7VNhIX5DC3fHWY5kf1T/pjLY0thMcQwInTnfsoz4pQDacb1 4hXcCsT7PfGE5hOqgikiljJkYfLHk1XNtiBUgZDM= 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 v7 21/27] v4l: subdev: routing kernel helper functions Date: Mon, 24 May 2021 13:44:02 +0300 Message-Id: <20210524104408.599645-22-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210524104408.599645-1-tomi.valkeinen@ideasonboard.com> References: <20210524104408.599645-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add helper functions for routing. These helpers make it easier for the drivers to use struct v4l2_subdev_krouting. Signed-off-by: Tomi Valkeinen --- drivers/media/v4l2-core/v4l2-subdev.c | 100 ++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 69 ++++++++++++++++++ 2 files changed, 169 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 28e84453fe28..ef18682dbc6f 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -912,6 +912,106 @@ v4l2_subdev_link_validate_get_format(struct media_pad *pad, return -EINVAL; } +int v4l2_subdev_get_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_krouting *routing) +{ + int ret; + + routing->which = state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; + routing->routes = NULL; + routing->num_routes = 0; + + ret = v4l2_subdev_call(sd, pad, get_routing, state, routing); + if (ret == 0) + return 0; + if (ret != -ENOSPC) + return ret; + + routing->routes = kvmalloc_array(routing->num_routes, + sizeof(*routing->routes), GFP_KERNEL); + if (!routing->routes) + return -ENOMEM; + + ret = v4l2_subdev_call(sd, pad, get_routing, state, routing); + if (ret) { + kvfree(routing->routes); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_get_routing); + +void v4l2_subdev_free_routing(struct v4l2_subdev_krouting *routing) +{ + kvfree(routing->routes); + routing->routes = NULL; + routing->num_routes = 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_free_routing); + +int v4l2_subdev_cpy_routing(struct v4l2_subdev_krouting *dst, + const struct v4l2_subdev_krouting *src) +{ + if (dst->num_routes < src->num_routes) { + dst->num_routes = src->num_routes; + return -ENOSPC; + } + + memcpy(dst->routes, src->routes, + src->num_routes * sizeof(*src->routes)); + dst->num_routes = src->num_routes; + dst->which = src->which; + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_cpy_routing); + +int v4l2_subdev_dup_routing(struct v4l2_subdev_krouting *dst, + const struct v4l2_subdev_krouting *src) +{ + v4l2_subdev_free_routing(dst); + + if (src->num_routes == 0) { + dst->which = src->which; + return 0; + } + + dst->routes = kvmalloc_array(src->num_routes, sizeof(*src->routes), + GFP_KERNEL); + if (!dst->routes) + return -ENOMEM; + + memcpy(dst->routes, src->routes, + src->num_routes * sizeof(*src->routes)); + dst->num_routes = src->num_routes; + dst->which = src->which; + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_dup_routing); + +bool v4l2_subdev_has_route(struct v4l2_subdev_krouting *routing, + unsigned int pad0, unsigned int pad1) +{ + unsigned int i; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + + if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) + continue; + + if ((route->sink_pad == pad0 && route->source_pad == pad1) || + (route->source_pad == pad0 && route->sink_pad == pad1)) + return true; + } + + return false; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_has_route); + 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 1cf91372d3cf..87f6bb78bbe9 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1248,4 +1248,73 @@ extern const struct v4l2_subdev_ops v4l2_subdev_call_wrappers; void v4l2_subdev_notify_event(struct v4l2_subdev *sd, const struct v4l2_event *ev); +/** + * v4l2_subdev_get_routing() - Get routing from a subdevice + * + * @sd: The subdev from which to get the routing + * @state: Pointer to &struct v4l2_subdev_state + * @routing: Pointer to the target &struct v4l2_subdev_krouting + * + * Get a copy of the subdevice's routing table. + * + * Must be freed with v4l2_subdev_free_routing after use. + */ +int v4l2_subdev_get_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_krouting *routing); + +/** + * v4l2_subdev_free_routing() - Free the routing + * + * @routing: The routing to be freed + * + * Frees the routing data in @routing. + */ +void v4l2_subdev_free_routing(struct v4l2_subdev_krouting *routing); + +/** + * v4l2_subdev_cpy_routing() - Copy the routing + * + * @dst: The destination routing + * @src: The source routing + * + * Copies routing from @src to @dst without allocating space. If @dst does not + * have enough space, set dst->num_routes to the required number of routes, and + * return -ENOSPC. + * + * Can be used in subdevice's v4l2_subdev_pad_ops.get_routing() callback. + */ +int v4l2_subdev_cpy_routing(struct v4l2_subdev_krouting *dst, + const struct v4l2_subdev_krouting *src); + +/** + * v4l2_subdev_dup_routing() - Duplicate the routing + * + * @dst: The destination routing + * @src: The source routing + * + * Makes a duplicate of the routing from @src to @dst by allocating enough + * memory and making a copy of the routing. + * + * Can be used in subdevice's v4l2_subdev_pad_ops.set_routing() callback + * to store the given routing. + * + * Must be freed with v4l2_subdev_free_routing after use. + */ +int v4l2_subdev_dup_routing(struct v4l2_subdev_krouting *dst, + const struct v4l2_subdev_krouting *src); + +/** + * v4l2_subdev_has_route() - Check if there is a route between two pads + * + * @routing: The subdevice's routing + * @pad0: First pad + * @pad1: Second pad + * + * Returns whether there is a route between @pad0 and @pad1 of the same + * subdevice according to the given routing. + */ +bool v4l2_subdev_has_route(struct v4l2_subdev_krouting *routing, + unsigned int pad0, unsigned int pad1); + #endif