media: ov5640: Remove frame rate check from find_mode()

The current implementation of ov5640_find_mode() fails if the
frame rate programmed with s_frame_interval doesn't match the
maximum frame rate for the current mode.

This causes issues when moving from one mode with higher FPS to another
one which only supports a lower FPS range with tools like media-ctl.

It also forces users that do not use s_frame_interval(), but rather
configure blankings explicitly, to adjust the programmed FPS range to
avoid failures.

For this reason, remove the FPS check from ov5640_find_mode() and only
perform it at s_frame_interval() time.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/i2c/ov5640.c

@@ -1995,8 +1995,7 @@ static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
 }
 
 static const struct ov5640_mode_info *
-ov5640_find_mode(struct ov5640_dev *sensor, enum ov5640_frame_rate fr,
-		 int width, int height, bool nearest)
+ov5640_find_mode(struct ov5640_dev *sensor, int width, int height, bool nearest)
 {
 	const struct ov5640_mode_info *mode;
 
@@ -2009,10 +2008,6 @@ ov5640_find_mode(struct ov5640_dev *sensor, enum ov5640_frame_rate fr,
 	     (mode->width != width || mode->height != height)))
 		return NULL;
 
-	/* Check to see if the current mode exceeds the max frame rate */
-	if (ov5640_framerates[fr] > ov5640_framerates[mode->max_fps])
-		return NULL;
-
 	return mode;
 }
 
@@ -2649,7 +2644,7 @@ static int ov5640_try_frame_interval(struct ov5640_dev *sensor,
 	fi->denominator = best_fps;
 
 find_mode:
-	mode = ov5640_find_mode(sensor, rate, width, height, false);
+	mode = ov5640_find_mode(sensor, width, height, false);
 	return mode ? rate : -EINVAL;
 }
 
@@ -2687,7 +2682,7 @@ static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
 	const struct ov5640_mode_info *mode;
 	int i;
 
-	mode = ov5640_find_mode(sensor, fr, fmt->width, fmt->height, true);
+	mode = ov5640_find_mode(sensor, fmt->width, fmt->height, true);
 	if (!mode)
 		return -EINVAL;
 	fmt->width = mode->width;
@@ -3481,13 +3476,17 @@ static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
 		goto out;
 	}
 
-	mode = ov5640_find_mode(sensor, frame_rate, mode->width,
-				mode->height, true);
+	mode = ov5640_find_mode(sensor, mode->width, mode->height, true);
 	if (!mode) {
 		ret = -EINVAL;
 		goto out;
 	}
 
+	if (ov5640_framerates[frame_rate] > ov5640_framerates[mode->max_fps]) {
+		ret = -EINVAL;
+		goto out;
+	}
+
 	if (mode != sensor->current_mode ||
 	    frame_rate != sensor->current_fr) {
 		sensor->current_fr = frame_rate;