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Message-ID: <20200622015227.24134-2-yunfei.dong@mediatek.com>
Date: Mon, 22 Jun 2020 09:52:26 +0800
From: Yunfei Dong <yunfei.dong@...iatek.com>
To: Hans Verkuil <hverkuil@...all.nl>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Rob Herring <robh+dt@...nel.org>
CC: Yunfei Dong <yunfei.dong@...iatek.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Matthias Brugger <matthias.bgg@...il.com>,
<linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
Tomasz Figa <tfiga@...omium.org>
Subject: [PATCH v2, 1/2] media: v4l UAPI: add V4L2_BUF_CAP_SUPPORTS_RO_REQUESTS
This patch adds support for the V4L2_BUF_CAP_SUPPORTS_RO_REQUESTS
flag. This flag is used for Read-only(Ro) Request.
Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
---
Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
index b6d52083707b..7c7451773b8e 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst
@@ -126,6 +126,7 @@ aborting or finishing any DMA in progress, an implicit
.. _V4L2-BUF-CAP-SUPPORTS-REQUESTS:
.. _V4L2-BUF-CAP-SUPPORTS-ORPHANED-BUFS:
.. _V4L2-BUF-CAP-SUPPORTS-M2M-HOLD-CAPTURE-BUF:
+.. _V4L2-BUF-CAP-SUPPORTS-RO-REQUESTS:
.. cssclass:: longtable
@@ -156,6 +157,9 @@ aborting or finishing any DMA in progress, an implicit
- Only valid for stateless decoders. If set, then userspace can set the
``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag to hold off on returning the
capture buffer until the OUTPUT timestamp changes.
+ * - ``V4L2_BUF_CAP_SUPPORTS_RO_REQUESTS``
+ - 0x00000040
+ - This buffer type supports :ref:`requests <media-request-api>`.
Return Value
============
--
2.18.0
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