libcamera: converter_v4l2_m2m: Always set stride

Ensure the stride is properly set after a call to validateOutput().

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
Reviewed-by: Umang Jain <uajain@igalia.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

src/libcamera/converter/converter_v4l2_m2m.cpp

@@ -680,6 +680,7 @@ int V4L2M2MConverter::validateOutput(StreamConfiguration *cfg, bool *adjusted,
 
 	const Size cfgSize = cfg->size;
 	cfg->size = adjustSizes(cfgSize, it->second, align);
+	cfg->stride = PixelFormatInfo::info(cfg->pixelFormat).stride(cfg->size.width, 0);
 
 	if (cfg->size.isNull())
 		return -EINVAL;