From: Hugues Fruchet <hugues.fruchet@st.com>
Date: Wed, 4 Jul 2018 13:04:38 +0000 (-0400)
Subject: media: ov5640: do not change mode if format or frame interval is unchanged
X-Git-Tag: v5.15~8227^2~259
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6949d864776ef295ddc8f840d7d6a2dbe51bd9d1;p=platform%2Fkernel%2Flinux-starfive.git

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
--- 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;