The OV5645 supports automatic exposure (AE) and automatic white
balance (AWB). When streaming is started it takes up to 5 frames
until the AE and AWB converge and output a frame with good quality.
Implement g_skip_frames to report number of frames to be skipped
when streaming is started.
Signed-off-by: Todor Tomov <todor.tomov@xxxxxxxxxx>
---
drivers/media/i2c/ov5645.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index 1722cda..00bc3c0 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -70,6 +70,9 @@
#define OV5645_SDE_SAT_U 0x5583
#define OV5645_SDE_SAT_V 0x5584
+/* Number of frames needed for AE and AWB to converge */
+#define OV5645_NUM_OF_SKIP_FRAMES 5
+
struct reg_value {
u16 reg;
u8 val;
@@ -1071,6 +1074,13 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
return 0;
}
+static int ov5645_get_skip_frames(struct v4l2_subdev *sd, u32 *frames)
+{
+ *frames = OV5645_NUM_OF_SKIP_FRAMES;
+
+ return 0;
+}
+
static const struct v4l2_subdev_core_ops ov5645_core_ops = {
.s_power = ov5645_s_power,
};
@@ -1088,10 +1098,15 @@ static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
.get_selection = ov5645_get_selection,
};
+static const struct v4l2_subdev_sensor_ops ov5645_sensor_ops = {
+ .g_skip_frames = ov5645_get_skip_frames,
+};
+
static const struct v4l2_subdev_ops ov5645_subdev_ops = {
.core = &ov5645_core_ops,
.video = &ov5645_video_ops,
.pad = &ov5645_subdev_pad_ops,
+ .sensor = &ov5645_sensor_ops,
};
static int ov5645_probe(struct i2c_client *client,
--
2.7.4
