media: v4l: omap3isp: Get the parallel bus type from DT

The OMAP3 ISP supports both external and embedded BT.656 synchronization
for parallel buses. It currently gets the bus type information from the
source subdev through the .g_mbus_config() operation, but should instead
get it from DT as that's the authoritative source of bus configuration
information.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/omap3isp/isp.c

@@ -2042,6 +2042,7 @@ static int isp_fwnode_parse(struct device *dev, struct fwnode_handle *fwnode,
 			!!(vep.bus.parallel.flags & V4L2_MBUS_FIELD_EVEN_LOW);
 		buscfg->bus.parallel.data_pol =
 			!!(vep.bus.parallel.flags & V4L2_MBUS_DATA_ACTIVE_LOW);
+		buscfg->bus.parallel.bt656 = vep.bus_type == V4L2_MBUS_BT656;
 		break;
 
 	case ISP_OF_PHY_CSIPHY1:

drivers/media/platform/omap3isp/ispccdc.c

@@ -1139,15 +1139,9 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc)
 	pad = media_entity_remote_pad(&ccdc->pads[CCDC_PAD_SINK]);
 	sensor = media_entity_to_v4l2_subdev(pad->entity);
 	if (ccdc->input == CCDC_INPUT_PARALLEL) {
-		struct v4l2_mbus_config cfg;
-		int ret;
-
-		ret = v4l2_subdev_call(sensor, video, g_mbus_config, &cfg);
-		if (!ret)
-			ccdc->bt656 = cfg.type == V4L2_MBUS_BT656;
-
 		parcfg = &((struct isp_bus_cfg *)sensor->host_priv)
 			->bus.parallel;
+		ccdc->bt656 = parcfg->bt656;
 	}
 
 	/* CCDC_PAD_SINK */

drivers/media/platform/omap3isp/omap3isp.h

@@ -46,6 +46,7 @@ enum isp_interface_type {
  *		0 - Positive, 1 - Negative
  * @data_pol: Data polarity
  *		0 - Normal, 1 - One's complement
+ * @bt656: Data contain BT.656 embedded synchronization
  */
 struct isp_parallel_cfg {
 	unsigned int data_lane_shift:3;
@@ -54,6 +55,7 @@ struct isp_parallel_cfg {
 	unsigned int vs_pol:1;
 	unsigned int fld_pol:1;
 	unsigned int data_pol:1;
+	unsigned int bt656:1;
 };
 
 enum {