[RFC v5 06/15] media: uapi: Add V4L2_CID_CONFIG_MODEL control

Sakari Ailus
2025-02-03T08:59:30Z

Add the V4L2_CID_CONFIG_MODEL control for the configuration model.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
.../userspace-api/media/v4l/ext-ctrls-image-process.rst | 4 ++++
drivers/media/v4l2-core/v4l2-ctrls-defs.c | 5 +++++
include/uapi/linux/v4l2-controls.h | 3 +++
3 files changed, 12 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
index 27803dca8d3e..2ae17ed99729 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
@@ -55,3 +55,7 @@ Image Process Control IDs
control value divided by e.g. 0x100, meaning that to get no
digital gain the control value needs to be 0x100. The no-gain
configuration is also typically the default.
+
+``V4L2_CID_CONFIG_MODEL (bitmask)``
+ Which configuration models the sub-device supports. Please see
+ :ref:`media_subdev_config_model`. This is a read-only control.
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
index 1ea52011247a..24c9c25e20d1 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
@@ -1164,6 +1164,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_TEST_PATTERN: return "Test Pattern";
case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode";
case V4L2_CID_DIGITAL_GAIN: return "Digital Gain";
+ case V4L2_CID_CONFIG_MODEL: return "Sub-device configuration model";

/* DV controls */
/* Keep the order of the 'case's the same as in v4l2-controls.h! */
@@ -1481,6 +1482,10 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_DV_RX_POWER_PRESENT:
*type = V4L2_CTRL_TYPE_BITMASK;
break;
+ case V4L2_CID_CONFIG_MODEL:
+ *flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ *type = V4L2_CTRL_TYPE_BITMASK;
+ break;
case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
*type = V4L2_CTRL_TYPE_INTEGER;
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 974fd254e573..731add75d9ee 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -1225,6 +1225,9 @@ enum v4l2_jpeg_chroma_subsampling {
#define V4L2_CID_TEST_PATTERN (V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)
#define V4L2_CID_DEINTERLACING_MODE (V4L2_CID_IMAGE_PROC_CLASS_BASE + 4)
#define V4L2_CID_DIGITAL_GAIN (V4L2_CID_IMAGE_PROC_CLASS_BASE + 5)
+#define V4L2_CID_CONFIG_MODEL (V4L2_CID_IMAGE_PROC_CLASS_BASE + 6)
+
+#define V4L2_CID_CONFIG_MODEL_COMMON_RAW (1U << 0)

/* DV-class control IDs defined by V4L2 */
#define V4L2_CID_DV_CLASS_BASE (V4L2_CTRL_CLASS_DV | 0x900)
--
2.39.5