The V4L2_SEL_TGT_NATIVE_SIZE target is used to denote e.g. the size of a
sensor's pixel array.
Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
---
since v2:
- Add a note on s_selection support for native selection target on mem2mem
devices only.
- Reverse the order or left and top fields, i.e. make it the same as in
struct v4l2_rect.
Documentation/DocBook/media/v4l/selections-common.xml | 16 ++++++++++++++++
include/uapi/linux/v4l2-common.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/Documentation/DocBook/media/v4l/selections-common.xml
b/Documentation/DocBook/media/v4l/selections-common.xml
index 7502f78..d6d56fb 100644
--- a/Documentation/DocBook/media/v4l/selections-common.xml
+++ b/Documentation/DocBook/media/v4l/selections-common.xml
@@ -63,6 +63,22 @@
<entry>Yes</entry>
</row>
<row>
+ <entry><constant>V4L2_SEL_TGT_NATIVE_SIZE</constant></entry>
+ <entry>0x0003</entry>
+ <entry>The native size of the device, e.g. a sensor's
+ pixel array. <structfield>left</structfield> and
+ <structfield>top</structfield> fields are zero for this
+ target. Setting the native size will generally only make
+ sense for memory to memory devices where the software can
+ create a canvas of a given size in which for example a
+ video frame can be composed. In that case
+ V4L2_SEL_TGT_NATIVE_SIZE can be used to configure the size
+ of that canvas.
+ </entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
<entry><constant>V4L2_SEL_TGT_COMPOSE</constant></entry>
<entry>0x0100</entry>
<entry>Compose rectangle. Used to configure scaling
diff --git a/include/uapi/linux/v4l2-common.h b/include/uapi/linux/v4l2-common.h
index 2f6f8ca..1527398 100644
--- a/include/uapi/linux/v4l2-common.h
+++ b/include/uapi/linux/v4l2-common.h
@@ -43,6 +43,8 @@
#define V4L2_SEL_TGT_CROP_DEFAULT 0x0001
/* Cropping bounds */
#define V4L2_SEL_TGT_CROP_BOUNDS 0x0002
+/* Native frame size */
+#define V4L2_SEL_TGT_NATIVE_SIZE 0x0003
/* Current composing area */
#define V4L2_SEL_TGT_COMPOSE 0x0100
/* Default composing area */
--
1.7.10.4
--
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