From patchwork Wed Apr 15 10:50:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 210179 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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 CC7C1C3815B for ; Wed, 15 Apr 2020 10:48:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AAF62214AF for ; Wed, 15 Apr 2020 10:48:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2896430AbgDOKsI (ORCPT ); Wed, 15 Apr 2020 06:48:08 -0400 Received: from relay10.mail.gandi.net ([217.70.178.230]:47853 "EHLO relay10.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896623AbgDOKrx (ORCPT ); Wed, 15 Apr 2020 06:47:53 -0400 Received: from uno.homenet.telecomitalia.it (2-224-242-101.ip172.fastwebnet.it [2.224.242.101]) (Authenticated sender: jacopo@jmondi.org) by relay10.mail.gandi.net (Postfix) with ESMTPSA id 74885240002; Wed, 15 Apr 2020 10:47:42 +0000 (UTC) From: Jacopo Mondi To: mchehab@kernel.org, hverkuil-cisco@xs4all.nl, sakari.ailus@linux.intel.com, laurent.pinchart@ideasonboard.com Cc: Jacopo Mondi , niklas.soderlund+renesas@ragnatech.se, kieran.bingham@ideasonboard.com, dave.stevenson@raspberrypi.com, hyun.kwon@xilinx.com, linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH v2 3/6] media: v4l2-subdev: Expand get_mbus_config doc Date: Wed, 15 Apr 2020 12:50:00 +0200 Message-Id: <20200415105004.2497356-4-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200415105004.2497356-1-jacopo+renesas@jmondi.org> References: <20200415105004.2497356-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Expand documentation of the newly introduced get_mbus_config() pad operation. Signed-off-by: Jacopo Mondi --- Providing this as separate patch to ease review/discussion. Can be likely squashed in 1/6 --- include/media/v4l2-subdev.h | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) -- 2.26.0 diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 9bf14c41626d..e95f44e778a6 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -737,7 +737,17 @@ 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_mbus_config: get the current mbus configuration + * @get_mbus_config: get the current media bus configuration. This operation is + * intended to be used to synchronize the media bus + * configuration parameters between receivers and + * transmitters. The static bus configuration is usually + * received from the firmware interface, and updated + * dynamically using this operation to retrieve bus + * configuration parameters which could change at run-time. + * Callers should make sure they get the most up-to-date as + * possible configuration from the connected sub-device, + * likely calling this operation as close as possible to + * stream on time. */ struct v4l2_subdev_pad_ops { int (*init_cfg)(struct v4l2_subdev *sd,