[PATCH 1/2] v4l2-ctl: Add --try-routing option

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v4l2-ctl's --list-subdev-mbus-codes option sets the which flag to
V4L2_SUBDEV_FORMAT_TRY, which is an entirely reasonable choice, but
means it's currently impossible to list mbus codes for pads that are
only part of inactive routes as the --set-routing option sets ACTIVE
routing rather than TRY.

Add a --try-routing option that has identical functionality to the
existing --set-routing but which uses the TRY format instead.

Signed-off-by: Daniel Scally <dan.scally@xxxxxxxxxxxxxxxx>
---
 utils/v4l2-ctl/v4l2-ctl-subdev.cpp | 11 +++++++----
 utils/v4l2-ctl/v4l2-ctl.cpp        |  1 +
 utils/v4l2-ctl/v4l2-ctl.h          |  1 +
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/utils/v4l2-ctl/v4l2-ctl-subdev.cpp b/utils/v4l2-ctl/v4l2-ctl-subdev.cpp
index 86e6c689..48b79288 100644
--- a/utils/v4l2-ctl/v4l2-ctl-subdev.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-subdev.cpp
@@ -96,7 +96,8 @@ void subdev_usage()
 	       "  --set-subdev-fps pad=<pad>,stream=<stream>,fps=<fps> (for testing only, otherwise use media-ctl)\n"
 	       "                     set the frame rate [VIDIOC_SUBDEV_S_FRAME_INTERVAL]\n"
 	       "  --get-routing      Print the route topology\n"
-	       "  --set-routing <routes>\n"
+	       "  --set-routing      (for testing only, otherwise use media-ctl)\n"
+	       "  --try-routing <routes>\n"
 	       "                     Comma-separated list of route descriptors to setup\n"
 	       "\n"
 	       "Routes are defined as\n"
@@ -458,14 +459,16 @@ void subdev_cmd(int ch, char *optarg)
 			}
 		}
 		break;
-	case OptSetRouting: {
+	case OptSetRouting:
+	case OptTryRouting: {
 		struct v4l2_subdev_route *r;
 		char *end, *ref, *tok;
 		unsigned int flags;
 
 		memset(&routing, 0, sizeof(routing));
 		memset(routes, 0, sizeof(routes[0]) * NUM_ROUTES_MAX);
-		routing.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+		routing.which = ch == OptSetRouting ? V4L2_SUBDEV_FORMAT_ACTIVE :
+				      V4L2_SUBDEV_FORMAT_TRY;
 		routing.num_routes = 0;
 		routing.routes = (__u64)routes;
 
@@ -683,7 +686,7 @@ void subdev_set(cv4l_fd &_fd)
 					fival.interval.denominator, fival.interval.numerator);
 		}
 	}
-	if (options[OptSetRouting]) {
+	if (options[OptSetRouting] || options[OptTryRouting]) {
 		if (!_fd.has_streams()) {
 			printf("Streams API not supported.\n");
 			return;
diff --git a/utils/v4l2-ctl/v4l2-ctl.cpp b/utils/v4l2-ctl/v4l2-ctl.cpp
index e195ad8e..f9121284 100644
--- a/utils/v4l2-ctl/v4l2-ctl.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl.cpp
@@ -65,6 +65,7 @@ static struct option long_options[] = {
 	{"set-fmt-video-out", required_argument, nullptr, OptSetVideoOutFormat},
 	{"try-fmt-video-out", required_argument, nullptr, OptTryVideoOutFormat},
 	{"get-routing", no_argument, 0, OptGetRouting},
+	{"try-routing", required_argument, 0, OptTryRouting},
 	{"set-routing", required_argument, 0, OptSetRouting},
 	{"help", no_argument, nullptr, OptHelp},
 	{"help-tuner", no_argument, nullptr, OptHelpTuner},
diff --git a/utils/v4l2-ctl/v4l2-ctl.h b/utils/v4l2-ctl/v4l2-ctl.h
index cc7f1184..6382619c 100644
--- a/utils/v4l2-ctl/v4l2-ctl.h
+++ b/utils/v4l2-ctl/v4l2-ctl.h
@@ -193,6 +193,7 @@ enum Option {
 	OptShowEdid,
 	OptFixEdidChecksums,
 	OptGetRouting,
+	OptTryRouting,
 	OptSetRouting,
 	OptFreqSeek,
 	OptEncoderCmd,
-- 
2.34.1





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