media: ov5640: do not change mode if format or frame interval is unchanged

Save load of mode registers array when V4L2 client sets a format or a
frame interval which selects the same mode than the current one.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 1ecbb7a..071f4bc 100644 (file)
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -1966,9 +1966,11 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
                goto out;
        }
 
-       sensor->current_mode = new_mode;
-       sensor->fmt = *mbus_fmt;
-       sensor->pending_mode_change = true;
+       if (new_mode != sensor->current_mode) {
+               sensor->current_mode = new_mode;
+               sensor->fmt = *mbus_fmt;
+               sensor->pending_mode_change = true;
+       }
 out:
        mutex_unlock(&sensor->lock);
        return ret;
@@ -2508,8 +2510,10 @@ static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
                goto out;
        }
 
-       sensor->current_mode = mode;
-       sensor->pending_mode_change = true;
+       if (mode != sensor->current_mode) {
+               sensor->current_mode = mode;
+               sensor->pending_mode_change = true;
+       }
 out:
        mutex_unlock(&sensor->lock);
        return ret;