[PATCH v1 3/3] drm/tegra: dc: Silence RGB output deferred-probe error

[Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Driver fails to probe with -EPROBE_DEFER if display output isn't ready
yet. This produces a bit noisy error message in KMSG during kernel's boot
up on Tegra20 and Tegra30 because RGB output tends to be probed earlier
than a corresponding voltage regulator driver.

Signed-off-by: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/gpu/drm/tegra/dc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 56d933e81797..d7f2c4654b6b 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -2571,7 +2571,11 @@ static int tegra_dc_probe(struct platform_device *pdev)
 
 	err = tegra_dc_rgb_probe(dc);
 	if (err < 0 && err != -ENODEV) {
-		dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err);
+		if (err == -EPROBE_DEFER)
+			dev_dbg(&pdev->dev, "RGB output probe deferred\n");
+		else
+			dev_err(&pdev->dev, "failed to probe RGB output: %d\n",
+				err);
 		return err;
 	}
 
-- 
2.25.1