From patchwork Tue Mar 5 18:51:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 10839959 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 67DC11515 for ; Tue, 5 Mar 2019 18:51:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 557152CA84 for ; Tue, 5 Mar 2019 18:51:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 479532CA9E; Tue, 5 Mar 2019 18:51:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8779E2CA84 for ; Tue, 5 Mar 2019 18:51:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727773AbfCESv5 (ORCPT ); Tue, 5 Mar 2019 13:51:57 -0500 Received: from relay12.mail.gandi.net ([217.70.178.232]:46799 "EHLO relay12.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726277AbfCESv4 (ORCPT ); Tue, 5 Mar 2019 13:51:56 -0500 Received: from uno.lan (2-224-242-101.ip172.fastwebnet.it [2.224.242.101]) (Authenticated sender: jacopo@jmondi.org) by relay12.mail.gandi.net (Postfix) with ESMTPSA id 1174A200002; Tue, 5 Mar 2019 18:51:52 +0000 (UTC) From: Jacopo Mondi To: sakari.ailus@linux.intel.com, laurent.pinchart@ideasonboard.com, niklas.soderlund+renesas@ragnatech.se Cc: Jacopo Mondi , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Michal Simek Subject: [PATCH v3 18/31] v4l: subdev: Add [GS]_ROUTING subdev ioctls and operations Date: Tue, 5 Mar 2019 19:51:37 +0100 Message-Id: <20190305185150.20776-19-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190305185150.20776-1-jacopo+renesas@jmondi.org> References: <20190305185150.20776-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Laurent Pinchart Signed-off-by: Laurent Pinchart Signed-off-by: Michal Simek - Add sink and source streams for multiplexed links - Copy the argument back in case of an error. This is needed to let the caller know the number of routes. Signed-off-by: Sakari Ailus Reviewed-by: Niklas Söderlund - Expand and refine documentation. - Make the 'routes' pointer a __u64 __user pointer so that a compat32 version of the ioctl is not required. - Add struct v4l2_subdev_krouting to be used for subdevice operations. Signed-off-by: Jacopo Mondi --- drivers/media/v4l2-core/v4l2-ioctl.c | 25 ++++++++++++++++- drivers/media/v4l2-core/v4l2-subdev.c | 36 ++++++++++++++++++++++++ include/media/v4l2-subdev.h | 22 +++++++++++++++ include/uapi/linux/v4l2-subdev.h | 40 +++++++++++++++++++++++++++ 4 files changed, 122 insertions(+), 1 deletion(-) diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index f6d663934648..255f8aff5db8 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -19,6 +19,7 @@ #include #include +#include #include #include @@ -2967,6 +2968,21 @@ static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, } break; } + + case VIDIOC_SUBDEV_G_ROUTING: + case VIDIOC_SUBDEV_S_ROUTING: { + struct v4l2_subdev_routing *route = parg; + + if (route->num_routes > 256) + return -EINVAL; + + *user_ptr = (void __user *)route->routes; + *kernel_ptr = (void *)&route->routes; + *array_size = sizeof(struct v4l2_subdev_route) + * route->num_routes; + ret = 1; + break; + } } return ret; @@ -3075,8 +3091,15 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, /* * Some ioctls can return an error, but still have valid * results that must be returned. + * + * FIXME: subdev IOCTLS are partially handled here and partially in + * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS + * defined here as part of the 'v4l2_ioctls' array. As + * VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even + * in case of failure, but it is not defined here as part of the + * 'v4l2_ioctls' array, insert an ad-hoc check to address that. */ - if (err < 0 && !always_copy) + if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING) goto out; out_array_args: diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index f5f0d71ec745..f845b0658913 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -519,6 +519,42 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_SUBDEV_QUERYSTD: return v4l2_subdev_call(sd, video, querystd, arg); + + case VIDIOC_SUBDEV_G_ROUTING: { + struct v4l2_subdev_routing *routing = arg; + struct v4l2_subdev_krouting krouting = { + .num_routes = routing->num_routes, + .routes = (struct v4l2_subdev_route *)routing->routes, + }; + int ret; + + ret = v4l2_subdev_call(sd, pad, get_routing, &krouting); + if (ret) + return ret; + + routing->num_routes = krouting.num_routes; + + return 0; + } + + case VIDIOC_SUBDEV_S_ROUTING: { + struct v4l2_subdev_routing *routing = arg; + struct v4l2_subdev_route *route = (struct v4l2_subdev_route *) + routing->routes; + struct v4l2_subdev_krouting krouting = {}; + unsigned int i; + + for (i = 0; i < routing->num_routes; ++i) { + if (route[i].sink_pad >= sd->entity.num_pads || + route[i].source_pad >= sd->entity.num_pads) + return -EINVAL; + } + + krouting.num_routes = routing->num_routes; + krouting.routes = route; + + return v4l2_subdev_call(sd, pad, set_routing, &krouting); + } #endif default: return v4l2_subdev_call(sd, core, ioctl, cmd, arg); diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 03707d16d668..6311f670de3c 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -669,6 +669,20 @@ struct v4l2_subdev_pad_config { struct v4l2_rect try_compose; }; +/** + * struct v4l2_subdev_krouting - subdev routing table + * + * @routes: &struct v4l2_subdev_route + * @num_routes: number of routes + * + * This structure is used to translate argument received from + * VIDIOC_SUBDEV_G/S_ROUTING() ioctl to sudev device drivers operations. + */ +struct v4l2_subdev_krouting { + struct v4l2_subdev_route *routes; + unsigned int num_routes; +}; + /** * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations * @@ -706,6 +720,10 @@ struct v4l2_subdev_pad_config { * * @set_frame_desc: set the low level media bus frame parameters, @fd array * may be adjusted by the subdev driver to device capabilities. + * + * @get_routing: get the subdevice routing table. + * @set_routing: enable or disable data connection routes described in the + * subdevice routing table. */ struct v4l2_subdev_pad_ops { int (*init_cfg)(struct v4l2_subdev *sd, @@ -746,6 +764,10 @@ struct v4l2_subdev_pad_ops { struct v4l2_mbus_frame_desc *fd); int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad, struct v4l2_mbus_frame_desc *fd); + int (*get_routing)(struct v4l2_subdev *sd, + struct v4l2_subdev_krouting *route); + int (*set_routing)(struct v4l2_subdev *sd, + struct v4l2_subdev_krouting *route); }; /** diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h index 03970ce30741..b8924a6a029c 100644 --- a/include/uapi/linux/v4l2-subdev.h +++ b/include/uapi/linux/v4l2-subdev.h @@ -155,6 +155,44 @@ struct v4l2_subdev_selection { __u32 reserved[8]; }; +#define V4L2_SUBDEV_ROUTE_FL_ACTIVE (1 << 0) +#define V4L2_SUBDEV_ROUTE_FL_IMMUTABLE (1 << 1) + +/** + * struct v4l2_subdev_route - A route inside a subdev + * @sink_pad: the sink pad index + * @sink_stream: the sink stream identifier + * @source_pad: the source pad index + * @source_stream: the source stream identifier + * @flags: route flags: + * + * V4L2_SUBDEV_ROUTE_FL_ACTIVE: Is the route active? An active + * route will start when streaming is enabled on a video node. + * Set by the user. + * + * V4L2_SUBDEV_ROUTE_FL_IMMUTABLE: Is the route immutable, i.e. + * can it be activated and inactivated? Set by the driver. + */ +struct v4l2_subdev_route { + __u32 sink_pad; + __u32 sink_stream; + __u32 source_pad; + __u32 source_stream; + __u32 flags; + __u32 reserved[5]; +}; + +/** + * struct v4l2_subdev_routing - Subdev routing information + * @routes: pointer to the routes array + * @num_routes: the total number of routes in the routes array + */ +struct v4l2_subdev_routing { + __u64 routes; + __u32 num_routes; + __u32 reserved[5]; +}; + /* Backwards compatibility define --- to be removed */ #define v4l2_subdev_edid v4l2_edid @@ -181,5 +219,7 @@ struct v4l2_subdev_selection { #define VIDIOC_SUBDEV_ENUM_DV_TIMINGS _IOWR('V', 98, struct v4l2_enum_dv_timings) #define VIDIOC_SUBDEV_QUERY_DV_TIMINGS _IOR('V', 99, struct v4l2_dv_timings) #define VIDIOC_SUBDEV_DV_TIMINGS_CAP _IOWR('V', 100, struct v4l2_dv_timings_cap) +#define VIDIOC_SUBDEV_G_ROUTING _IOWR('V', 38, struct v4l2_subdev_routing) +#define VIDIOC_SUBDEV_S_ROUTING _IOWR('V', 39, struct v4l2_subdev_routing) #endif