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Subject: media: uapi: Document which mbus format fields are valid for metadata
Author: Sakari Ailus <sakari.ai...@linux.intel.com>
Date: Tue Aug 1 16:15:36 2023 +0300
Now that metadata mbus formats have been added, it is necessary to define
which fields in struct v4l2_mbus_format are applicable to them (not many).
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Reviewed-by: Tomi Valkeinen <tomi.valkei...@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
.../userspace-api/media/v4l/subdev-formats.rst | 15 ++++++++-------
include/uapi/linux/v4l2-mediabus.h | 18 ++++++++++++------
2 files changed, 20 insertions(+), 13 deletions(-)
---
diff --git a/Documentation/userspace-api/media/v4l/subdev-formats.rst
b/Documentation/userspace-api/media/v4l/subdev-formats.rst
index c2cebf61d528..d2a6cd2e1eb2 100644
--- a/Documentation/userspace-api/media/v4l/subdev-formats.rst
+++ b/Documentation/userspace-api/media/v4l/subdev-formats.rst
@@ -33,7 +33,7 @@ Media Bus Formats
* - __u32
- ``field``
- Field order, from enum :c:type:`v4l2_field`. See
- :ref:`field-order` for details.
+ :ref:`field-order` for details. Zero for metadata mbus codes.
* - __u32
- ``colorspace``
- Image colorspace, from enum :c:type:`v4l2_colorspace`.
@@ -45,7 +45,7 @@ Media Bus Formats
conversion is supported by setting the flag
V4L2_SUBDEV_MBUS_CODE_CSC_COLORSPACE in the corresponding struct
:c:type:`v4l2_subdev_mbus_code_enum` during enumeration.
- See :ref:`v4l2-subdev-mbus-code-flags`.
+ See :ref:`v4l2-subdev-mbus-code-flags`. Zero for metadata mbus codes.
* - union {
- (anonymous)
* - __u16
@@ -61,7 +61,7 @@ Media Bus Formats
that ycbcr_enc conversion is supported by setting the flag
V4L2_SUBDEV_MBUS_CODE_CSC_YCBCR_ENC in the corresponding struct
:c:type:`v4l2_subdev_mbus_code_enum` during enumeration.
- See :ref:`v4l2-subdev-mbus-code-flags`.
+ See :ref:`v4l2-subdev-mbus-code-flags`. Zero for metadata mbus codes.
* - __u16
- ``hsv_enc``
- HSV encoding, from enum :c:type:`v4l2_hsv_encoding`.
@@ -75,7 +75,7 @@ Media Bus Formats
that hsv_enc conversion is supported by setting the flag
V4L2_SUBDEV_MBUS_CODE_CSC_HSV_ENC in the corresponding struct
:c:type:`v4l2_subdev_mbus_code_enum` during enumeration.
- See :ref:`v4l2-subdev-mbus-code-flags`
+ See :ref:`v4l2-subdev-mbus-code-flags`. Zero for metadata mbus codes.
* - }
-
* - __u16
@@ -90,8 +90,8 @@ Media Bus Formats
The driver indicates that quantization conversion is supported by
setting the flag V4L2_SUBDEV_MBUS_CODE_CSC_QUANTIZATION in the
corresponding struct :c:type:`v4l2_subdev_mbus_code_enum`
- during enumeration. See :ref:`v4l2-subdev-mbus-code-flags`.
-
+ during enumeration. See :ref:`v4l2-subdev-mbus-code-flags`. Zero for
+ metadata mbus codes.
* - __u16
- ``xfer_func``
- Transfer function, from enum :c:type:`v4l2_xfer_func`.
@@ -104,7 +104,8 @@ Media Bus Formats
The driver indicates that the transfer function conversion is supported
by
setting the flag V4L2_SUBDEV_MBUS_CODE_CSC_XFER_FUNC in the
corresponding struct :c:type:`v4l2_subdev_mbus_code_enum`
- during enumeration. See :ref:`v4l2-subdev-mbus-code-flags`.
+ during enumeration. See :ref:`v4l2-subdev-mbus-code-flags`. Zero for
+ metadata mbus codes.
* - __u16
- ``flags``
- flags See: :ref:v4l2-mbus-framefmt-flags
diff --git a/include/uapi/linux/v4l2-mediabus.h
b/include/uapi/linux/v4l2-mediabus.h
index 6b07b73473b5..946520bc49f1 100644
--- a/include/uapi/linux/v4l2-mediabus.h
+++ b/include/uapi/linux/v4l2-mediabus.h
@@ -19,12 +19,18 @@
* @width: image width
* @height: image height
* @code: data format code (from enum v4l2_mbus_pixelcode)
- * @field: used interlacing type (from enum v4l2_field)
- * @colorspace: colorspace of the data (from enum v4l2_colorspace)
- * @ycbcr_enc: YCbCr encoding of the data (from enum v4l2_ycbcr_encoding)
- * @hsv_enc: HSV encoding of the data (from enum v4l2_hsv_encoding)
- * @quantization: quantization of the data (from enum v4l2_quantization)
- * @xfer_func: transfer function of the data (from enum v4l2_xfer_func)
+ * @field: used interlacing type (from enum v4l2_field), zero for metadata
+ * mbus codes
+ * @colorspace: colorspace of the data (from enum v4l2_colorspace),
zero on
+ * metadata mbus codes
+ * @ycbcr_enc: YCbCr encoding of the data (from enum v4l2_ycbcr_encoding), zero
+ * for metadata mbus codes
+ * @hsv_enc: HSV encoding of the data (from enum v4l2_hsv_encoding), zero for
+ * metadata mbus codes
+ * @quantization: quantization of the data (from enum v4l2_quantization), zero
+ * for metadata mbus codes
+ * @xfer_func: transfer function of the data (from enum v4l2_xfer_func), zero
+ * for metadata mbus codes
* @flags: flags (V4L2_MBUS_FRAMEFMT_*)
* @reserved: reserved bytes that can be later used
*/
