[PATCH 10/55] media: rkisp1: cap: Print debug message on failed link validation

[Paul Elder]

From: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

When a link validation failure occurs, print a debug message to help
diagnosing the cause.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 .../media/platform/rockchip/rkisp1/rkisp1-capture.c    | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index 94819e6c23e2..94a0d787a312 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -1294,8 +1294,16 @@ static int rkisp1_capture_link_validate(struct media_link *link)
 
 	if (sd_fmt.format.height != cap->pix.fmt.height ||
 	    sd_fmt.format.width != cap->pix.fmt.width ||
-	    sd_fmt.format.code != fmt->mbus)
+	    sd_fmt.format.code != fmt->mbus) {
+		dev_dbg(cap->rkisp1->dev,
+			"link '%s':%u -> '%s':%u not valid: 0x%04x/%ux%u != 0x%04x/%ux%u",
+			link->source->entity->name, link->source->index,
+			link->sink->entity->name, link->sink->index,
+			sd_fmt.format.code, sd_fmt.format.width,
+			sd_fmt.format.height, fmt->mbus, cap->pix.fmt.width,
+			cap->pix.fmt.height);
 		return -EPIPE;
+	}
 
 	return 0;
 }
-- 
2.30.2