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@xxxxxxxxx>
---
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
