From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Fri, 13 Oct 2017 17:58:57 +0300
Subject: drm: omapdrm: dpi: Don't treat GPIO probe deferral as an error
Git-commit: 7a228a0d7e4e12c3bf1ee442d6c73aae39dc296a
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

There's no need to print an error message on probe deferral, that's a
normal situation. Probe deferral debugging can be performed by enabling
the related debug messages in the drivers core.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c
+++ b/drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c
@@ -173,7 +173,8 @@ static int tfp410_probe_of(struct platfo
 	if (gpio_is_valid(gpio) || gpio == -ENOENT) {
 		ddata->pd_gpio = gpio;
 	} else {
-		dev_err(&pdev->dev, "failed to parse PD gpio\n");
+		if (gpio != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "failed to parse PD gpio\n");
 		return gpio;
 	}