We add new controls, one for each of the four usual Bayer channels:
V4L2_CID_NOTIFY_GAIN_RED
V4L2_CID_NOTIFY_GAIN_GREENR
V4L2_CID_NOTIFY_GAIN_BLUE
V4L2_CID_NOTIFY_GAIN_GREENB
These are provided for sensors that need to know what colour gains
will be applied to the Bayer channel by subsequent processing (such as
by an ISP), even though the sensor will not apply this gain itself.
The units are linear with the default value indicating a gain of
exactly 1.
Signed-off-by: David Plowman <david.plowman@xxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-ctrls-defs.c | 4 ++++
include/uapi/linux/v4l2-controls.h | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
index b6344bbf1e00..12c810cd4ae6 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
@@ -1106,6 +1106,10 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
+ case V4L2_CID_NOTIFY_GAIN_RED: return "Notify Red Gain";
+ case V4L2_CID_NOTIFY_GAIN_GREENR: return "Notify Green (Red) Gain";
+ case V4L2_CID_NOTIFY_GAIN_BLUE: return "Notify Blue Gain";
+ case V4L2_CID_NOTIFY_GAIN_GREENB: return "Notify Green (Blue) Gain";
/* Image processing controls */
/* Keep the order of the 'case's the same as in v4l2-controls.h! */
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index fdf97a6d7d18..711930bb54f0 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -1117,6 +1117,10 @@ enum v4l2_jpeg_chroma_subsampling {
#define V4L2_CID_TEST_PATTERN_BLUE (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 6)
#define V4L2_CID_TEST_PATTERN_GREENB (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 7)
#define V4L2_CID_UNIT_CELL_SIZE (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 8)
+#define V4L2_CID_NOTIFY_GAIN_RED (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 9)
+#define V4L2_CID_NOTIFY_GAIN_GREENR (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 10)
+#define V4L2_CID_NOTIFY_GAIN_BLUE (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 11)
+#define V4L2_CID_NOTIFY_GAIN_GREENB (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 12)
/* Image processing controls */
--
2.30.2
