[PATCH 21/23] media: imx: imx7_mipi_csis: Reject invalid data-lanes settings

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

The CSIS doesn't support data lanes reordering. Reject invalid settings.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/staging/media/imx/imx7-mipi-csis.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c
index 07b331667db7..6e235c86e0aa 100644
--- a/drivers/staging/media/imx/imx7-mipi-csis.c
+++ b/drivers/staging/media/imx/imx7-mipi-csis.c
@@ -1115,6 +1115,7 @@ static int mipi_csis_async_register(struct csi_state *state)
 	};
 	struct v4l2_async_subdev *asd;
 	struct fwnode_handle *ep;
+	unsigned int i;
 	int ret;
 
 	v4l2_async_notifier_init(&state->notifier);
@@ -1128,6 +1129,14 @@ static int mipi_csis_async_register(struct csi_state *state)
 	if (ret)
 		goto err_parse;
 
+	for (i = 0; i < vep.bus.mipi_csi2.num_data_lanes; ++i) {
+		if (vep.bus.mipi_csi2.data_lanes[i] != i + 1) {
+			dev_err(state->dev,
+				"data lanes reordering is not supported");
+			goto err_parse;
+		}
+	}
+
 	state->bus = vep.bus.mipi_csi2;
 
 	dev_dbg(state->dev, "data lanes: %d\n", state->bus.num_data_lanes);
-- 
Regards,

Laurent Pinchart