adv748x: afe: add routing support
The adv748x afe has eight analog sink pads, currently one of them is
chosen to be the active route based on device tree configuration. With
the new routing API it's possible to control which of the eight sink
pads are routed to the source pad.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
diff --git a/drivers/media/i2c/adv748x/adv748x-afe.c b/drivers/media/i2c/adv748x/adv748x-afe.c
index 5188178..5474be3 100644
--- a/drivers/media/i2c/adv748x/adv748x-afe.c
+++ b/drivers/media/i2c/adv748x/adv748x-afe.c
@@ -43,6 +43,9 @@
#define ADV748X_AFE_STD_PAL_SECAM 0xe
#define ADV748X_AFE_STD_PAL_SECAM_PED 0xf
+#define ADV748X_AFE_ROUTES_MAX ((ADV748X_AFE_SINK_AIN7 - \
+ ADV748X_AFE_SINK_AIN0) + 1)
+
static int adv748x_afe_read_ro_map(struct adv748x_state *state, u8 reg)
{
int ret;
@@ -386,10 +389,72 @@ static int adv748x_afe_set_format(struct v4l2_subdev *sd,
return 0;
}
+static int adv748x_afe_get_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_routing *routing)
+{
+ struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
+ struct v4l2_subdev_route *r = routing->routes;
+ unsigned int i;
+
+ /* There is one possible route from each sink */
+ if (routing->num_routes < ADV748X_AFE_ROUTES_MAX) {
+ routing->num_routes = ADV748X_AFE_ROUTES_MAX;
+ return -ENOSPC;
+ }
+
+ routing->num_routes = ADV748X_AFE_ROUTES_MAX;
+
+ for (i = ADV748X_AFE_SINK_AIN0; i <= ADV748X_AFE_SINK_AIN7; i++) {
+ r->sink_pad = i;
+ r->sink_stream = 0;
+ r->source_pad = ADV748X_AFE_SOURCE;
+ r->source_stream = 0;
+ r->flags = afe->input == i ? V4L2_SUBDEV_ROUTE_FL_ACTIVE : 0;
+ r++;
+ }
+
+ return 0;
+}
+
+static int adv748x_afe_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_routing *routing)
+{
+ struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
+ struct v4l2_subdev_route *r = routing->routes;
+ int input = -1;
+ unsigned int i;
+
+ if (routing->num_routes > ADV748X_AFE_ROUTES_MAX)
+ return -ENOSPC;
+
+ for (i = 0; i < routing->num_routes; i++) {
+ if (r->sink_pad > ADV748X_AFE_SINK_AIN7 ||
+ r->sink_stream != 0 ||
+ r->source_pad != ADV748X_AFE_SOURCE ||
+ r->source_stream != 0)
+ return -EINVAL;
+
+ if (r->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE) {
+ if (input != -1)
+ return -EMLINK;
+
+ input = r->sink_pad;
+ }
+ r++;
+ }
+
+ if (input != -1)
+ afe->input = input;
+
+ return 0;
+}
+
static const struct v4l2_subdev_pad_ops adv748x_afe_pad_ops = {
.enum_mbus_code = adv748x_afe_enum_mbus_code,
.set_fmt = adv748x_afe_set_format,
.get_fmt = adv748x_afe_get_format,
+ .get_routing = adv748x_afe_get_routing,
+ .set_routing = adv748x_afe_set_routing,
};
/* -----------------------------------------------------------------------------
