libcamera: simple: Don't enforce conversion with an added raw stream

When a raw stream is requested, either alone or together with a
processed stream, it can be produced without conversion.  Let's amend
the corresponding check on the number of configurations, so that the
mere presence of a raw stream doesn't enforce conversion.

Reviewed-by: Umang Jain <uajain@igalia.com>
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/pipeline/simple/simple.cpp

@@ -1249,7 +1249,7 @@ CameraConfiguration::Status SimpleCameraConfiguration::validate()
 	 * require any conversion, similar to raw capture use cases). This is
 	 * left as a future improvement.
 	 */
-	needConversion_ = config_.size() > 1;
+	needConversion_ = config_.size() > 1 + rawCount;
 
 	for (unsigned int i = 0; i < config_.size(); ++i) {
 		StreamConfiguration &cfg = config_[i];