media: ov5640: Add ov5640_is_csi2() function

Checking if the sensor is used in DVP or MIPI CSI-2 mode is a repeated
pattern which is about to be repeated more often.

Provide an inline function to shortcut that.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/i2c/ov5640.c

@@ -294,6 +294,11 @@ static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 			     ctrls.handler)->sd;
 }
 
+static inline bool ov5640_is_csi2(const struct ov5640_dev *sensor)
+{
+	return sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY;
+}
+
 /*
  * FIXME: all of these register tables are likely filled with
  * entries that set the register to their power-on default values,
@@ -1208,7 +1213,7 @@ static int ov5640_load_regs(struct ov5640_dev *sensor,
 		/* remain in power down mode for DVP */
 		if (regs->reg_addr == OV5640_REG_SYS_CTRL0 &&
 		    val == OV5640_REG_SYS_CTRL0_SW_PWUP &&
-		    sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
+		    !ov5640_is_csi2(sensor))
 			continue;
 
 		if (mask)
@@ -1843,7 +1848,7 @@ static int ov5640_set_mode(struct ov5640_dev *sensor)
 	 * the same rate than YUV, so we can just use 16 bpp all the time.
 	 */
 	rate = ov5640_calc_pixel_rate(sensor) * 16;
-	if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
+	if (ov5640_is_csi2(sensor)) {
 		rate = rate / sensor->ep.bus.mipi_csi2.num_data_lanes;
 		ret = ov5640_set_mipi_pclk(sensor, rate);
 	} else {
@@ -3020,7 +3025,7 @@ static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
 			sensor->pending_fmt_change = false;
 		}
 
-		if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
+		if (ov5640_is_csi2(sensor))
 			ret = ov5640_set_stream_mipi(sensor, enable);
 		else
 			ret = ov5640_set_stream_dvp(sensor, enable);