From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 25EAEC18E5A for ; Mon, 9 Mar 2020 13:52:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0A20F20848 for ; Mon, 9 Mar 2020 13:52:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726637AbgCINwh (ORCPT ); Mon, 9 Mar 2020 09:52:37 -0400 Received: from mga06.intel.com ([134.134.136.31]:38105 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726528AbgCINwh (ORCPT ); Mon, 9 Mar 2020 09:52:37 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Mar 2020 06:52:35 -0700 X-IronPort-AV: E=Sophos;i="5.70,533,1574150400"; d="scan'208";a="241975188" Received: from paasikivi.fi.intel.com ([10.237.72.42]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Mar 2020 06:52:33 -0700 Received: by paasikivi.fi.intel.com (Postfix, from userid 1000) id B61DE20AC3; Mon, 9 Mar 2020 15:52:31 +0200 (EET) Date: Mon, 9 Mar 2020 15:52:31 +0200 From: Sakari Ailus To: Niklas =?iso-8859-1?Q?S=F6derlund?= Cc: Helen Koike , Hans Verkuil , Laurent Pinchart , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Niklas =?iso-8859-1?Q?S=F6derlund?= Subject: Re: [PATCH v4 1/3] v4l2-dev/ioctl: Add V4L2_CAP_IO_MC Message-ID: <20200309135231.GU5379@paasikivi.fi.intel.com> References: <20200306163935.805333-1-niklas.soderlund@ragnatech.se> <20200306163935.805333-2-niklas.soderlund@ragnatech.se> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200306163935.805333-2-niklas.soderlund@ragnatech.se> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi Niklas, On Fri, Mar 06, 2020 at 05:39:33PM +0100, Niklas Söderlund wrote: > From: Niklas Söderlund > > Add a video device capability flag to indicate that its inputs and/or > outputs are controlled by the Media Controller instead of the V4L2 API. > When this flag is set, ioctl for enum inputs and outputs are > automatically enabled and programmed to call a helper function. > > Suggested-by: Hans Verkuil > Signed-off-by: Helen Koike > Signed-off-by: Niklas Söderlund > --- > * Changes since v3 > - Update documentation for V4L2_CAP_IO_MC > - Only enable VIDIOC_{G,S}_{INPUT,OUTPUT} if V4L2_CAP_IO_MC is set > (instead of unconditionally) > - Merge v4l2_ioctl_enum_input_mc() into v4l_enuminput() > - Merge v4l2_ioctl_enum_output_mc() into v4l_enumoutput() > > * Changes since v2 > - Merged the two patches touching V4L2 core stuff to a single patch. > - Updated documentation for V4L2_CAP_IO_MC > - Added is_io_mc bool in determine_valid_ioctls() > - Folded or moved code closer to where it's used > - Remove unneeded memset() > - Use strscpy() instead of strlcpy() > --- > .../media/uapi/v4l/vidioc-querycap.rst | 6 ++ > .../media/videodev2.h.rst.exceptions | 1 + > drivers/media/v4l2-core/v4l2-dev.c | 25 ++++++-- > drivers/media/v4l2-core/v4l2-ioctl.c | 57 +++++++++++++++++-- > include/uapi/linux/videodev2.h | 2 + > 5 files changed, 81 insertions(+), 10 deletions(-) > > diff --git a/Documentation/media/uapi/v4l/vidioc-querycap.rst b/Documentation/media/uapi/v4l/vidioc-querycap.rst > index 5f9930195d624c73..497a6aa2cbebad71 100644 > --- a/Documentation/media/uapi/v4l/vidioc-querycap.rst > +++ b/Documentation/media/uapi/v4l/vidioc-querycap.rst > @@ -264,6 +264,12 @@ specification the ioctl returns an ``EINVAL`` error code. > * - ``V4L2_CAP_TOUCH`` > - 0x10000000 > - This is a touch device. > + * - ``V4L2_CAP_IO_MC`` > + - 0x20000000 > + - There is only one input and/or output seen from userspace. The whole > + video topology configuration, including which I/O entity is routed to > + the input/output, is configured by userspace via the Media Controller. > + See :ref:`media_controller`. > * - ``V4L2_CAP_DEVICE_CAPS`` > - 0x80000000 > - The driver fills the ``device_caps`` field. This capability can > diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions > index cb6ccf91776e6b56..a625fb90e3a989a7 100644 > --- a/Documentation/media/videodev2.h.rst.exceptions > +++ b/Documentation/media/videodev2.h.rst.exceptions > @@ -176,6 +176,7 @@ replace define V4L2_CAP_STREAMING device-capabilities > replace define V4L2_CAP_META_OUTPUT device-capabilities > replace define V4L2_CAP_DEVICE_CAPS device-capabilities > replace define V4L2_CAP_TOUCH device-capabilities > +replace define V4L2_CAP_IO_MC device-capabilities > > # V4L2 pix flags > replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format` > diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c > index 97b6a3af13614639..a593ea0598b551b4 100644 > --- a/drivers/media/v4l2-core/v4l2-dev.c > +++ b/drivers/media/v4l2-core/v4l2-dev.c > @@ -552,6 +552,7 @@ static void determine_valid_ioctls(struct video_device *vdev) > (vdev->device_caps & meta_caps); > bool is_rx = vdev->vfl_dir != VFL_DIR_TX; > bool is_tx = vdev->vfl_dir != VFL_DIR_RX; > + bool is_io_mc = vdev->device_caps & V4L2_CAP_IO_MC; > > bitmap_zero(valid_ioctls, BASE_VIDIOC_PRIVATE); > > @@ -725,9 +726,15 @@ static void determine_valid_ioctls(struct video_device *vdev) > SET_VALID_IOCTL(ops, VIDIOC_G_STD, vidioc_g_std); > if (is_rx) { > SET_VALID_IOCTL(ops, VIDIOC_QUERYSTD, vidioc_querystd); > - SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input); > - SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input); > - SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input); > + if (is_io_mc) { One more comment. I'd make this dependent on the device node type, i.e. devices with meta_caps set, the IOCTLs won't be supported. So the check would become: if (is_io_mc && !is_meta) > + set_bit(_IOC_NR(VIDIOC_ENUMINPUT), valid_ioctls); > + set_bit(_IOC_NR(VIDIOC_G_INPUT), valid_ioctls); > + set_bit(_IOC_NR(VIDIOC_S_INPUT), valid_ioctls); > + } else { > + SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input); > + SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input); > + SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input); > + } > SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDIO, vidioc_enumaudio); > SET_VALID_IOCTL(ops, VIDIOC_G_AUDIO, vidioc_g_audio); > SET_VALID_IOCTL(ops, VIDIOC_S_AUDIO, vidioc_s_audio); -- Sakari Ailus