From patchwork Tue Mar 1 16:11:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 547430 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 8EAA8C433EF for ; Tue, 1 Mar 2022 16:13:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236055AbiCAQNo (ORCPT ); Tue, 1 Mar 2022 11:13:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236060AbiCAQNm (ORCPT ); Tue, 1 Mar 2022 11:13:42 -0500 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72D0030F40 for ; Tue, 1 Mar 2022 08:13:00 -0800 (PST) Received: from deskari.lan (91-156-85-209.elisa-laajakaista.fi [91.156.85.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 3F4B9E41; Tue, 1 Mar 2022 17:12:43 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1646151163; bh=K+pyvG60lfET2rpADlniVzUQM3XKrDJk8C0fb98QIIY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wj90kLa2LfcYcI8FkvseCIgQ18eVkbwKy7OTn3cqP/fPtDYvHcFth2WtkNcmjTntD IT65e5W3QlcuxYr5mtYgloMK0WBpA2Nav9VNNl+esWjto+L1Q4pG+iGnoT7tc5hHLn 0+nldNv4AAvvX2Y3fqsmte4MONkCq62GxNVO3Neo= 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 v11 27/36] media: subdev: use streams in v4l2_subdev_link_validate() Date: Tue, 1 Mar 2022 18:11:47 +0200 Message-Id: <20220301161156.1119557-28-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220301161156.1119557-1-tomi.valkeinen@ideasonboard.com> References: <20220301161156.1119557-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Update v4l2_subdev_link_validate() to use routing and streams for validation. Instead of just looking at the format on the pad on both ends of the link, the routing tables are used to collect all the streams going from the source to the sink over the link, and the streams' formats on both ends of the link are verified. Signed-off-by: Tomi Valkeinen --- drivers/media/v4l2-core/v4l2-subdev.c | 245 ++++++++++++++++++++++++-- 1 file changed, 227 insertions(+), 18 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 339d7b15e26c..091b854e00d0 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -1035,6 +1036,7 @@ EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); static int v4l2_subdev_link_validate_get_format(struct media_pad *pad, + u32 stream, struct v4l2_subdev_format *fmt) { if (is_media_entity_v4l2_subdev(pad->entity)) { @@ -1046,6 +1048,7 @@ v4l2_subdev_link_validate_get_format(struct media_pad *pad, fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; fmt->pad = pad->index; + fmt->stream = stream; return v4l2_subdev_call(sd, pad, get_fmt, state, fmt); } @@ -1056,31 +1059,237 @@ v4l2_subdev_link_validate_get_format(struct media_pad *pad, return -EINVAL; } -int v4l2_subdev_link_validate(struct media_link *link) +static int cmp_u32(const void *a, const void *b) { - struct v4l2_subdev *sink; - struct v4l2_subdev_format sink_fmt, source_fmt; - int rval; + u32 a32 = *(u32 *)a; + u32 b32 = *(u32 *)b; - rval = v4l2_subdev_link_validate_get_format( - link->source, &source_fmt); - if (rval < 0) - return 0; + return a32 > b32 ? 1 : (a32 < b32 ? -1 : 0); +} + +static int v4l2_link_validate_get_streams(struct media_link *link, + bool is_source, u32 *out_num_streams, + const u32 **out_streams, + bool *allocated) +{ + static const u32 default_streams[] = { 0 }; + struct v4l2_subdev_krouting *routing; + struct v4l2_subdev *subdev; + u32 num_streams; + u32 *streams; + unsigned int i; + struct v4l2_subdev_state *state; + + if (is_source) + subdev = media_entity_to_v4l2_subdev(link->source->entity); + else + subdev = media_entity_to_v4l2_subdev(link->sink->entity); - rval = v4l2_subdev_link_validate_get_format( - link->sink, &sink_fmt); - if (rval < 0) + if (!(subdev->flags & V4L2_SUBDEV_FL_MULTIPLEXED)) { + *out_num_streams = 1; + *out_streams = default_streams; + *allocated = false; return 0; + } - sink = media_entity_to_v4l2_subdev(link->sink->entity); + state = v4l2_subdev_get_locked_active_state(subdev); - rval = v4l2_subdev_call(sink, pad, link_validate, link, - &source_fmt, &sink_fmt); - if (rval != -ENOIOCTLCMD) - return rval; + routing = &state->routing; + + streams = kmalloc_array(routing->num_routes, sizeof(u32), GFP_KERNEL); + if (!streams) + return -ENOMEM; + + num_streams = 0; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + int j; + u32 route_pad; + u32 route_stream; + u32 link_pad; + + if (is_source) { + route_pad = route->source_pad; + route_stream = route->source_stream; + link_pad = link->source->index; + } else { + route_pad = route->sink_pad; + route_stream = route->sink_stream; + link_pad = link->sink->index; + } + + if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) + continue; + + if (route_pad != link_pad) + continue; + + /* look for duplicates... */ + for (j = 0; j < num_streams; ++j) { + if (streams[j] == route_stream) + break; + } + + /* ...and drop the stream if we already have it */ + if (j != num_streams) + continue; + + streams[num_streams++] = route_stream; + } + + sort(streams, num_streams, sizeof(u32), &cmp_u32, NULL); - return v4l2_subdev_link_validate_default( - sink, link, &source_fmt, &sink_fmt); + *out_num_streams = num_streams; + *out_streams = streams; + *allocated = true; + + return 0; +} + +static int v4l2_subdev_link_validate_locked(struct media_link *link) +{ + struct v4l2_subdev *sink_subdev = + media_entity_to_v4l2_subdev(link->sink->entity); + struct device *dev = sink_subdev->entity.graph_obj.mdev->dev; + u32 num_source_streams; + const u32 *source_streams; + bool source_allocated; + u32 num_sink_streams; + const u32 *sink_streams; + bool sink_allocated; + unsigned int sink_idx; + unsigned int source_idx; + int ret; + + dev_dbg(dev, "validating link \"%s\":%u -> \"%s\":%u\n", + link->source->entity->name, link->source->index, + link->sink->entity->name, link->sink->index); + + ret = v4l2_link_validate_get_streams(link, true, &num_source_streams, + &source_streams, + &source_allocated); + if (ret) + return ret; + + ret = v4l2_link_validate_get_streams(link, false, &num_sink_streams, + &sink_streams, &sink_allocated); + if (ret) + goto free_source; + + /* + * It is ok to have more source streams than sink streams as extra + * source streams can just be ignored (i.e. they go nowhere), but extra + * sink streams is an error. + */ + if (num_source_streams < num_sink_streams) { + dev_err(dev, + "Not enough source streams: %d < %d\n", + num_source_streams, num_sink_streams); + ret = -EINVAL; + goto out; + } + + /* Validate source and sink stream formats */ + + source_idx = 0; + + for (sink_idx = 0; sink_idx < num_sink_streams; ++sink_idx) { + struct v4l2_subdev_format sink_fmt, source_fmt; + u32 stream; + + stream = sink_streams[sink_idx]; + + for (; source_idx < num_source_streams; ++source_idx) { + if (source_streams[source_idx] == stream) + break; + } + + if (source_idx == num_source_streams) { + dev_err(dev, "No source stream for sink stream %u\n", + stream); + ret = -EINVAL; + goto out; + } + + dev_dbg(dev, "validating stream \"%s\":%u:%u -> \"%s\":%u:%u\n", + link->source->entity->name, link->source->index, stream, + link->sink->entity->name, link->sink->index, stream); + + ret = v4l2_subdev_link_validate_get_format(link->source, stream, + &source_fmt); + if (ret < 0) { + dev_dbg(dev, "Failed to get format for \"%s\":%u:%u (but that's ok)\n", + link->source->entity->name, link->source->index, + stream); + ret = 0; + continue; + } + + ret = v4l2_subdev_link_validate_get_format(link->sink, stream, + &sink_fmt); + if (ret < 0) { + dev_dbg(dev, "Failed to get format for \"%s\":%u:%u (but that's ok)\n", + link->sink->entity->name, link->sink->index, + stream); + ret = 0; + continue; + } + + /* TODO: add stream number to link_validate() */ + ret = v4l2_subdev_call(sink_subdev, pad, link_validate, link, + &source_fmt, &sink_fmt); + if (!ret) + continue; + + if (ret != -ENOIOCTLCMD) + goto out; + + ret = v4l2_subdev_link_validate_default(sink_subdev, link, + &source_fmt, &sink_fmt); + + if (ret) + goto out; + } + +out: + if (sink_allocated) + kfree(sink_streams); + +free_source: + if (source_allocated) + kfree(source_streams); + + return ret; +} + +int v4l2_subdev_link_validate(struct media_link *link) +{ + struct v4l2_subdev *source_sd, *sink_sd; + struct v4l2_subdev_state *source_state, *sink_state; + int ret; + + sink_sd = media_entity_to_v4l2_subdev(link->sink->entity); + source_sd = media_entity_to_v4l2_subdev(link->source->entity); + + sink_state = v4l2_subdev_get_active_state(sink_sd); + source_state = v4l2_subdev_get_active_state(source_sd); + + if (sink_state) + v4l2_subdev_lock_state(sink_state); + + if (source_state) + v4l2_subdev_lock_state(source_state); + + ret = v4l2_subdev_link_validate_locked(link); + + if (sink_state) + v4l2_subdev_unlock_state(sink_state); + + if (source_state) + v4l2_subdev_unlock_state(source_state); + + return ret; } EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);