From: Fabio Estevam <fabio.estevam@nxp.com>
Date: Fri, 30 Jun 2017 18:14:46 -0300
Subject: drm/panel: simple: Skip error message on deferred probe
Git-commit: b8e93807911a6fa3e8d8a4460d6129b0a85e9c70
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
When enable_gpio is provided via an I2C or SPI expander, it may not be
available when panel-simple probes leading to the following error:
panel-simple panel: failed to request GPIO: -517
As this error message is not very useful to the end user, skip printing
it in the case of deferred probe.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1498857286-10820-1-git-send-email-festevam@gmail.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/panel/panel-simple.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -315,7 +315,8 @@ static int panel_simple_probe(struct dev
GPIOD_OUT_LOW);
if (IS_ERR(panel->enable_gpio)) {
err = PTR_ERR(panel->enable_gpio);
- dev_err(dev, "failed to request GPIO: %d\n", err);
+ if (err != -EPROBE_DEFER)
+ dev_err(dev, "failed to request GPIO: %d\n", err);
return err;
}