xrt: introduce XRT_ERROR_INPUT_UNSUPPORTED

Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2271>

doc/changes/xrt/mr.2271.md

@@ -1 +1,2 @@
 - xrt_device_get_tracked_pose returns xrt_result_t to improve error handling in the state tracker
+- introduce XRT_ERROR_INPUT_UNSUPPORTED

src/xrt/auxiliary/util/u_pretty_print.c

@@ -172,6 +172,7 @@ u_pp_xrt_result(struct u_pp_delegate dg, xrt_result_t xret)
 	case XRT_ERROR_UNSUPPORTED_SPACE_TYPE:               DG("XRT_ERROR_UNSUPPORTED_SPACE_TYPE"); return;
 	case XRT_ERROR_ANDROID:                              DG("XRT_ERROR_ANDROID"); return;
 	case XRT_ERROR_FEATURE_NOT_SUPPORTED:                DG("XRT_ERROR_FEATURE_NOT_SUPPORTED"); return;
+	case XRT_ERROR_INPUT_UNSUPPORTED:                    DG("XRT_ERROR_INPUT_UNSUPPORTED"); return;
 	}
 	// clang-format on
 

src/xrt/include/xrt/xrt_results.h

@@ -189,6 +189,7 @@ typedef enum xrt_result
 	 * The supplied space type is not supported for this operation.
 	 */
 	XRT_ERROR_UNSUPPORTED_SPACE_TYPE = -30,
+
 	/*!
 	 * Some other Android error, typically a logic error that should be impossible to reach.
 	 */
@@ -198,4 +199,9 @@ typedef enum xrt_result
 	 * Returned when a feature is not supported by the device.
 	 */
 	XRT_ERROR_FEATURE_NOT_SUPPORTED = -32,
+
+	/*!
+	 * The input provided is a valid value from the enum xrt_input_name but is not supported by the driver.
+	 */
+	XRT_ERROR_INPUT_UNSUPPORTED = -33,
 } xrt_result_t;