linux-kernel - [PATCH v9 12/15] media: uapi: Declare interface types for Audio

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Message-Id: <1699595289-25773-13-git-send-email-shengjiu.wang@nxp.com>
Date:   Fri, 10 Nov 2023 13:48:06 +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: [PATCH v9 12/15] media: uapi: Declare interface types for Audio

Declare the interface types that will be used by Audio.
The type is MEDIA_INTF_T_V4L_AUDIO.

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 .../userspace-api/media/mediactl/media-types.rst    |  4 ++++
 drivers/media/v4l2-core/v4l2-dev.c                  |  4 ++++
 drivers/media/v4l2-core/v4l2-mem2mem.c              | 13 +++++++++----
 include/uapi/linux/media.h                          |  1 +
 4 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/Documentation/userspace-api/media/mediactl/media-types.rst b/Documentation/userspace-api/media/mediactl/media-types.rst
index 0ffeece1e0c8..3f0bcb18a5ca 100644
--- a/Documentation/userspace-api/media/mediactl/media-types.rst
+++ b/Documentation/userspace-api/media/mediactl/media-types.rst
@@ -322,6 +322,10 @@ Types and flags used to represent the media graph elements
        -  Device node interface for Touch device (V4L)
        -  typically, /dev/v4l-touch?
 
+    *  -  ``MEDIA_INTF_T_V4L_AUDIO``
+       -  Device node interface for Audio device (V4L)
+       -  typically, /dev/v4l-audio?
+
     *  -  ``MEDIA_INTF_T_ALSA_PCM_CAPTURE``
        -  Device node interface for ALSA PCM Capture
        -  typically, /dev/snd/pcmC?D?c
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index b92c760b611a..c3a7d974db26 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -842,6 +842,10 @@ static int video_register_media_controller(struct video_device *vdev)
 		intf_type = MEDIA_INTF_T_V4L_SUBDEV;
 		/* Entity will be created via v4l2_device_register_subdev() */
 		break;
+	case VFL_TYPE_AUDIO:
+		intf_type = MEDIA_INTF_T_V4L_AUDIO;
+		/* Entity will be created via v4l2_device_register_subdev() */
+		break;
 	default:
 		return 0;
 	}
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 0cc30397fbad..bf41d112b742 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -1134,10 +1134,15 @@ int v4l2_m2m_register_media_controller(struct v4l2_m2m_dev *m2m_dev,
 	if (ret)
 		goto err_rm_links0;
 
-	/* Create video interface */
-	m2m_dev->intf_devnode = media_devnode_create(mdev,
-			MEDIA_INTF_T_V4L_VIDEO, 0,
-			VIDEO_MAJOR, vdev->minor);
+	if (vdev->vfl_type == VFL_TYPE_AUDIO)
+		m2m_dev->intf_devnode = media_devnode_create(mdev,
+				MEDIA_INTF_T_V4L_AUDIO, 0,
+				VIDEO_MAJOR, vdev->minor);
+	else
+		/* Create video interface */
+		m2m_dev->intf_devnode = media_devnode_create(mdev,
+				MEDIA_INTF_T_V4L_VIDEO, 0,
+				VIDEO_MAJOR, vdev->minor);
 	if (!m2m_dev->intf_devnode) {
 		ret = -ENOMEM;
 		goto err_rm_links1;
diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
index 1c80b1d6bbaf..9ff6dec7393a 100644
--- a/include/uapi/linux/media.h
+++ b/include/uapi/linux/media.h
@@ -260,6 +260,7 @@ struct media_links_enum {
 #define MEDIA_INTF_T_V4L_SUBDEV			(MEDIA_INTF_T_V4L_BASE + 3)
 #define MEDIA_INTF_T_V4L_SWRADIO		(MEDIA_INTF_T_V4L_BASE + 4)
 #define MEDIA_INTF_T_V4L_TOUCH			(MEDIA_INTF_T_V4L_BASE + 5)
+#define MEDIA_INTF_T_V4L_AUDIO			(MEDIA_INTF_T_V4L_BASE + 6)
 
 #define MEDIA_INTF_T_ALSA_BASE			0x00000300
 #define MEDIA_INTF_T_ALSA_PCM_CAPTURE		(MEDIA_INTF_T_ALSA_BASE)
-- 
2.34.1