linux-kernel - [RFC PATCH v7 06/13] media: uapi: Add V4L2_CAP_AUDIO

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Message-Id: <1697794232-2607-7-git-send-email-shengjiu.wang@nxp.com>
Date:   Fri, 20 Oct 2023 17:30:25 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     hverkuil@...all.nl, sakari.ailus@....fi, tfiga@...omium.org,
        m.szyprowski@...sung.com, mchehab@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        shengjiu.wang@...il.com, Xiubo.Lee@...il.com, festevam@...il.com,
        nicoleotsuka@...il.com, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: [RFC PATCH v7 06/13] media: uapi: Add V4L2_CAP_AUDIO_M2M capability flag

V4L2_CAP_AUDIO_M2M is similar to V4L2_CAP_VIDEO_M2M flag.

It is used for audio memory to memory case.

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 Documentation/userspace-api/media/v4l/vidioc-querycap.rst    | 3 +++
 Documentation/userspace-api/media/videodev2.h.rst.exceptions | 1 +
 include/uapi/linux/videodev2.h                               | 1 +
 3 files changed, 5 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst
index 6c57b8428356..0b3cefefc86b 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst
@@ -259,6 +259,9 @@ specification the ioctl returns an ``EINVAL`` error code.
         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_AUDIO_M2M``
+      - 0x40000000
+      - The device supports the audio Memory-To-Memory interface.
     * - ``V4L2_CAP_DEVICE_CAPS``
       - 0x80000000
       - The driver fills the ``device_caps`` field. This capability can
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index 3e58aac4ef0b..da6d0b8e4c2c 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -197,6 +197,7 @@ 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
+replace define V4L2_CAP_AUDIO_M2M device-capabilities
 
 # V4L2 pix flags
 replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format`
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index c3d4e490ce7c..d5da76607101 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -508,6 +508,7 @@ struct v4l2_capability {
 #define V4L2_CAP_TOUCH                  0x10000000  /* Is a touch device */
 
 #define V4L2_CAP_IO_MC			0x20000000  /* Is input/output controlled by the media controller */
+#define V4L2_CAP_AUDIO_M2M              0x40000000  /* audio memory to memory */
 
 #define V4L2_CAP_DEVICE_CAPS            0x80000000  /* sets device capabilities field */
 
-- 
2.34.1