[media] v4l: of: Correct pclk-sample for BT656 bus

Current v4l2_of_parse_parallel_bus function attempts to parse the
DT properties for the parallel bus as well as BT656 bus.
If the pclk-sample property is defined for the BT656 bus, it is still
marked as a parallel bus.
Fix this by parsing the pclk after the bus_type is selected.
Only when hsync or vsync properties are specified, the bus_type should
be set to V4L2_MBUS_PARALLEL.

Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/v4l2-core/v4l2-of.c

@@ -93,10 +93,6 @@ static void v4l2_of_parse_parallel_bus(const struct device_node *node,
 		flags |= v ? V4L2_MBUS_VSYNC_ACTIVE_HIGH :
 			V4L2_MBUS_VSYNC_ACTIVE_LOW;
 
-	if (!of_property_read_u32(node, "pclk-sample", &v))
-		flags |= v ? V4L2_MBUS_PCLK_SAMPLE_RISING :
-			V4L2_MBUS_PCLK_SAMPLE_FALLING;
-
 	if (!of_property_read_u32(node, "field-even-active", &v))
 		flags |= v ? V4L2_MBUS_FIELD_EVEN_HIGH :
 			V4L2_MBUS_FIELD_EVEN_LOW;
@@ -105,6 +101,10 @@ static void v4l2_of_parse_parallel_bus(const struct device_node *node,
 	else
 		endpoint->bus_type = V4L2_MBUS_BT656;
 
+	if (!of_property_read_u32(node, "pclk-sample", &v))
+		flags |= v ? V4L2_MBUS_PCLK_SAMPLE_RISING :
+			V4L2_MBUS_PCLK_SAMPLE_FALLING;
+
 	if (!of_property_read_u32(node, "data-active", &v))
 		flags |= v ? V4L2_MBUS_DATA_ACTIVE_HIGH :
 			V4L2_MBUS_DATA_ACTIVE_LOW;