V4L2 subdev frame interval support

Extend the V4L2 media bus format syntax to support an optional frame interval
value. If specified, the frame interval is set on the subdev.

Signed-off-by: Todor Tomov <ttomov@mm-sol.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/options.c b/options.c
index 69ff9d5..6fd2daf 100644
--- a/options.c
+++ b/options.c
@@ -50,11 +50,12 @@ static void usage(const char *argv0, int verbose)
 	printf("\n");
 	printf("Links and formats are defined as\n");
 	printf("\tlink            = pad, '->', pad, '[', flags, ']' ;\n");
-	printf("\tformat          = pad, '[', fcc, ' ', size, [ ' ', crop ], ']' ;\n");
+	printf("\tformat          = pad, '[', fcc, ' ', size, [ ' ', crop ], [ ' ', '@', frame interval ], ']' ;\n");
 	printf("\tpad             = entity, ':', pad number ;\n");
 	printf("\tentity          = entity number | ( '\"', entity name, '\"' ) ;\n");
 	printf("\tsize            = width, 'x', height ;\n");
 	printf("\tcrop            = left, ',', top, '/', size ;\n");
+	printf("\tframe interval  = numerator, '/', denominator ;\n");
 	printf("where the fields are\n");
 	printf("\tentity number   Entity numeric identifier\n");
 	printf("\tentity name     Entify name (string) \n");
@@ -63,6 +64,8 @@ static void usage(const char *argv0, int verbose)
 	printf("\tfcc             Format FourCC\n");
 	printf("\twidth           Image width in pixels\n");
 	printf("\theight          Image height in pixels\n");
+	printf("\tnumerator       Frame interval numerator\n");
+	printf("\tdenominator     Frame interval denominator\n");
 }
 
 #define OPT_PRINT_DOT	256