media: subdev: add stream based configuration

Add support to manage configurations (format, crop, compose) per stream,
instead of per pad. This is accomplished with data structures that hold
an array of all subdev's stream configurations.

The number of streams can vary at runtime based on routing. Every time
the routing is changed, the stream configurations need to be
re-initialized.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

1 files changed, 21 insertions, 7 deletions

diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h
index 284ae8c95960..654d659de835 100644
--- a/include/uapi/linux/v4l2-subdev.h
+++ b/include/uapi/linux/v4l2-subdev.h
@@ -32,13 +32,15 @@ enum v4l2_subdev_format_whence {
  * @which: format type (from enum v4l2_subdev_format_whence)
  * @pad: pad number, as reported by the media API
  * @format: media bus format (format code and frame size)
+ * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_format {
 	__u32 which;
 	__u32 pad;
 	struct v4l2_mbus_framefmt format;
-	__u32 reserved[8];
+	__u32 stream;
+	__u32 reserved[7];
 };
 
 /**
@@ -46,13 +48,15 @@ struct v4l2_subdev_format {
  * @which: format type (from enum v4l2_subdev_format_whence)
  * @pad: pad number, as reported by the media API
  * @rect: pad crop rectangle boundaries
+ * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_crop {
 	__u32 which;
 	__u32 pad;
 	struct v4l2_rect rect;
-	__u32 reserved[8];
+	__u32 stream;
+	__u32 reserved[7];
 };
 
 #define V4L2_SUBDEV_MBUS_CODE_CSC_COLORSPACE	0x00000001
@@ -68,6 +72,7 @@ struct v4l2_subdev_crop {
  * @code: format code (MEDIA_BUS_FMT_ definitions)
  * @which: format type (from enum v4l2_subdev_format_whence)
  * @flags: flags set by the driver, (V4L2_SUBDEV_MBUS_CODE_*)
+ * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_mbus_code_enum {
@@ -76,7 +81,8 @@ struct v4l2_subdev_mbus_code_enum {
 	__u32 code;
 	__u32 which;
 	__u32 flags;
-	__u32 reserved[7];
+	__u32 stream;
+	__u32 reserved[6];
 };
 
 /**
@@ -89,6 +95,7 @@ struct v4l2_subdev_mbus_code_enum {
  * @min_height: minimum frame height, in pixels
  * @max_height: maximum frame height, in pixels
  * @which: format type (from enum v4l2_subdev_format_whence)
+ * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_frame_size_enum {
@@ -100,19 +107,22 @@ struct v4l2_subdev_frame_size_enum {
 	__u32 min_height;
 	__u32 max_height;
 	__u32 which;
-	__u32 reserved[8];
+	__u32 stream;
+	__u32 reserved[7];
 };
 
 /**
  * struct v4l2_subdev_frame_interval - Pad-level frame rate
  * @pad: pad number, as reported by the media API
  * @interval: frame interval in seconds
+ * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_frame_interval {
 	__u32 pad;
 	struct v4l2_fract interval;
-	__u32 reserved[9];
+	__u32 stream;
+	__u32 reserved[8];
 };
 
 /**
@@ -124,6 +134,7 @@ struct v4l2_subdev_frame_interval {
  * @height: frame height in pixels
  * @interval: frame interval in seconds
  * @which: format type (from enum v4l2_subdev_format_whence)
+ * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_frame_interval_enum {
@@ -134,7 +145,8 @@ struct v4l2_subdev_frame_interval_enum {
 	__u32 height;
 	struct v4l2_fract interval;
 	__u32 which;
-	__u32 reserved[8];
+	__u32 stream;
+	__u32 reserved[7];
 };
 
 /**
@@ -146,6 +158,7 @@ struct v4l2_subdev_frame_interval_enum {
  *	    defined in v4l2-common.h; V4L2_SEL_TGT_* .
  * @flags: constraint flags, defined in v4l2-common.h; V4L2_SEL_FLAG_*.
  * @r: coordinates of the selection window
+ * @stream: stream number, defined in subdev routing
  * @reserved: for future use, set to zero for now
  *
  * Hardware may use multiple helper windows to process a video stream.
@@ -158,7 +171,8 @@ struct v4l2_subdev_selection {
 	__u32 target;
 	__u32 flags;
 	struct v4l2_rect r;
-	__u32 reserved[8];
+	__u32 stream;
+	__u32 reserved[7];
 };
 
 /**