media: i2c: imx219: Perform a full mode set unconditionally

The .set_fmt() handler tries to avoid updating the sensor configuration
when the mode hasn't changed. It does so by comparing both the mode and
the media bus code. While the latter correctly uses the media bus code
stored in the subdev state, the former compares the mode being set with
the active mode, regardless of whether .set_fmt() is called for the
ACTIVE or TRY format. This can lead to .set_fmt() returning early when
operating on TRY formats.

This could be fixed by replacing the mode comparison with width and
height comparisons, using the frame size stored in the subdev state.
However, the optimization that avoids updates to the sensor
configuration is not very useful, and is not commonly found in sensor
drivers. To improve consistency across sensor drivers, it is better, in
addition to being easier, to simply drop it. Do so.

Fixes: e8a5b1d ("media: i2c: imx219: Use subdev active state")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Author: pinchartl

drivers/media/i2c/imx219.c

@@ -762,9 +762,6 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd,
 	format = v4l2_subdev_get_pad_format(sd, sd_state, 0);
 	crop = v4l2_subdev_get_pad_crop(sd, sd_state, 0);
 
-	if (imx219->mode == mode && format->code == fmt->format.code)
-		return 0;
-
 	*format = fmt->format;
 	*crop = mode->crop;