libcamera: v4l2_videodevice: Drop toV4L2PixelFormat()

The V4L2VideoDevice::toV4L2PixelFormat() function is incorrectly
implemented, as it will pick a multi-planar format if the device
supports the multi-planar API, even if only single-planar formats are
supported. This currently works because the implementation calls
V4L2PixelFormat::fromPixelFormat(), which ignores the multiplanar
argument and always returns a single-planar format.

Fixing this isn't trivial. As we don't need to support multi-planar V4L2
formats at this point, drop the function instead of pretending
everything is fine, and call V4L2PixelFormat::fromPixelFormat() directly
from pipeline handlers. As the single-planar case is the most common,
set the multiplanar argument to false by default to avoid long lines.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
index 973ecd5b..264f5370 100644
--- a/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
+++ b/src/libcamera/pipeline/uvcvideo/uvcvideo.cpp
@@ -151,7 +151,7 @@ CameraConfiguration::Status UVCCameraConfiguration::validate()
 	cfg.bufferCount = 4;
 
 	V4L2DeviceFormat format;
-	format.fourcc = data_->video_->toV4L2PixelFormat(cfg.pixelFormat);
+	format.fourcc = V4L2PixelFormat::fromPixelFormat(cfg.pixelFormat);
 	format.size = cfg.size;
 
 	int ret = data_->video_->tryFormat(&format);
@@ -207,7 +207,7 @@ int PipelineHandlerUVC::configure(Camera *camera, CameraConfiguration *config)
 	int ret;
 
 	V4L2DeviceFormat format;
-	format.fourcc = data->video_->toV4L2PixelFormat(cfg.pixelFormat);
+	format.fourcc = V4L2PixelFormat::fromPixelFormat(cfg.pixelFormat);
 	format.size = cfg.size;
 
 	ret = data->video_->setFormat(&format);
@@ -215,7 +215,7 @@ int PipelineHandlerUVC::configure(Camera *camera, CameraConfiguration *config)
 		return ret;
 
 	if (format.size != cfg.size ||
-	    format.fourcc != data->video_->toV4L2PixelFormat(cfg.pixelFormat))
+	    format.fourcc != V4L2PixelFormat::fromPixelFormat(cfg.pixelFormat))
 		return -EINVAL;
 
 	cfg.setStream(&data->stream_);