[PATCH v13 18/34] media: add V4L2_SUBDEV_CAP_STREAMS

From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com,
	Jacopo Mondi <jacopo+renesas@jmondi.org>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	niklas.soderlund+renesas@ragnatech.se,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	Pratyush Yadav <p.yadav@ti.com>,
	Kishon Vijay Abraham <kishon@ti.com>,
	satish.nagireddy@getcruise.com, Tomasz Figa <tfiga@chromium.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Subject: [PATCH v13 18/34] media: add V4L2_SUBDEV_CAP_STREAMS
Date: Wed, 10 Aug 2022 15:11:06 +0300	[thread overview]
Message-ID: <20220810121122.3149086-19-tomi.valkeinen@ideasonboard.com> (raw)
In-Reply-To: <20220810121122.3149086-1-tomi.valkeinen@ideasonboard.com>

Add a subdev capability flag to expose to userspace if a subdev supports
multiplexed streams.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
 drivers/media/v4l2-core/v4l2-subdev.c | 4 +++-
 include/uapi/linux/v4l2-subdev.h      | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 5c27bac772ea..90826b956693 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -439,7 +439,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
 
 		memset(cap->reserved, 0, sizeof(cap->reserved));
 		cap->version = LINUX_VERSION_CODE;
-		cap->capabilities = ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0;
+		cap->capabilities =
+			(ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0) |
+			((sd->flags & V4L2_SUBDEV_FL_STREAMS) ? V4L2_SUBDEV_CAP_STREAMS : 0);
 
 		return 0;
 	}
diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h
index 658106f5b5dc..89af27f50a41 100644
--- a/include/uapi/linux/v4l2-subdev.h
+++ b/include/uapi/linux/v4l2-subdev.h
@@ -188,6 +188,9 @@ struct v4l2_subdev_capability {
 /* The v4l2 sub-device video device node is registered in read-only mode. */
 #define V4L2_SUBDEV_CAP_RO_SUBDEV		0x00000001
 
+/* The v4l2 sub-device supports routing and multiplexed streams. */
+#define V4L2_SUBDEV_CAP_STREAMS			0x00000002
+
 /* Backwards compatibility define --- to be removed */
 #define v4l2_subdev_edid v4l2_edid
 
-- 
2.34.1

