linux-kernel - [PATCH v3,1/2] media: v4l UAPI: add V4L2_BUF_CAP_SUPPORTS_RO

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Date:   Wed, 1 Jul 2020 17:35:21 +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>,
        Alexandre Courbot <acourbot@...omium.org>
Subject: [PATCH v3,1/2] 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