[PATCH 3/3] media: i2c: isl7998x: Implement get_mbus_config

[Marek Vasut <marex@denx.de>]

This is used e.g. by imx6-mipi-csi2.c to determine the CSI2 lane count.
Implement the callback in isl7998x driver so it can be used with i.MX6
CSI2 receiver.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Michael Tretter <m.tretter@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: linux-media@vger.kernel.org
---
 drivers/media/i2c/isl7998x.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/media/i2c/isl7998x.c b/drivers/media/i2c/isl7998x.c
index 7d2799e498520..560f4845b5e62 100644
--- a/drivers/media/i2c/isl7998x.c
+++ b/drivers/media/i2c/isl7998x.c
@@ -1045,6 +1045,17 @@ static int isl7998x_set_fmt(struct v4l2_subdev *sd,
 	return 0;
 }
 
+static int isl7998x_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
+				    struct v4l2_mbus_config *cfg)
+{
+	struct isl7998x *isl7998x = sd_to_isl7998x(sd);
+
+	cfg->type = V4L2_MBUS_CSI2_DPHY;
+	cfg->bus.mipi_csi2.num_data_lanes = isl7998x->nr_mipi_lanes;
+
+	return 0;
+}
+
 static int isl7998x_set_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct isl7998x *isl7998x = container_of(ctrl->handler,
@@ -1104,6 +1115,7 @@ static const struct v4l2_subdev_pad_ops isl7998x_subdev_pad_ops = {
 	.enum_frame_size	= isl7998x_enum_frame_size,
 	.get_fmt		= isl7998x_get_fmt,
 	.set_fmt		= isl7998x_set_fmt,
+	.get_mbus_config	= isl7998x_get_mbus_config,
 };
 
 static const struct v4l2_subdev_ops isl7998x_subdev_ops = {
-- 
2.43.0