From patchwork Thu Nov 25 02:21:51 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 355292 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oAP2MDTm021881 for ; Thu, 25 Nov 2010 02:22:16 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756458Ab0KYCVy (ORCPT ); Wed, 24 Nov 2010 21:21:54 -0500 Received: from perceval.ideasonboard.com ([95.142.166.194]:35115 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755974Ab0KYCVu (ORCPT ); Wed, 24 Nov 2010 21:21:50 -0500 Received: from localhost.localdomain (unknown [91.178.68.191]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 3A23735CA9; Thu, 25 Nov 2010 02:21:49 +0000 (UTC) From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: sakari.ailus@maxwell.research.nokia.com Subject: [RFC/PATCH v4 6/7] v4l: subdev: Control ioctls support Date: Thu, 25 Nov 2010 03:21:51 +0100 Message-Id: <1290651712-14940-7-git-send-email-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 1.7.2.2 In-Reply-To: <1290651712-14940-1-git-send-email-laurent.pinchart@ideasonboard.com> References: <1290651712-14940-1-git-send-email-laurent.pinchart@ideasonboard.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Thu, 25 Nov 2010 02:22:16 +0000 (UTC) diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt index 4c9185a..f683f63 100644 --- a/Documentation/video4linux/v4l2-framework.txt +++ b/Documentation/video4linux/v4l2-framework.txt @@ -336,6 +336,22 @@ argument to 0. Setting the argument to 1 will only enable device node registration if the sub-device driver has set the V4L2_SUBDEV_FL_HAS_DEVNODE flag. +The device node handles a subset of the V4L2 API. + +VIDIOC_QUERYCTRL +VIDIOC_QUERYMENU +VIDIOC_G_CTRL +VIDIOC_S_CTRL +VIDIOC_G_EXT_CTRLS +VIDIOC_S_EXT_CTRLS +VIDIOC_TRY_EXT_CTRLS + + The controls ioctls are identical to the ones defined in V4L2. They + behave identically, with the only exception that they deal only with + controls implemented in the sub-device. Depending on the driver, those + controls can be also be accessed through one (or several) V4L2 device + nodes. + I2C sub-device drivers ---------------------- diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c index 0deff78..806ec30 100644 --- a/drivers/media/video/v4l2-subdev.c +++ b/drivers/media/video/v4l2-subdev.c @@ -45,7 +45,31 @@ static int subdev_close(struct file *file) static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) { + struct video_device *vdev = video_devdata(file); + struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); + switch (cmd) { + case VIDIOC_QUERYCTRL: + return v4l2_subdev_call(sd, core, queryctrl, arg); + + case VIDIOC_QUERYMENU: + return v4l2_subdev_call(sd, core, querymenu, arg); + + case VIDIOC_G_CTRL: + return v4l2_subdev_call(sd, core, g_ctrl, arg); + + case VIDIOC_S_CTRL: + return v4l2_subdev_call(sd, core, s_ctrl, arg); + + case VIDIOC_G_EXT_CTRLS: + return v4l2_subdev_call(sd, core, g_ext_ctrls, arg); + + case VIDIOC_S_EXT_CTRLS: + return v4l2_subdev_call(sd, core, s_ext_ctrls, arg); + + case VIDIOC_TRY_EXT_CTRLS: + return v4l2_subdev_call(sd, core, try_ext_ctrls, arg); + default: return -ENOIOCTLCMD; }