[PATCH v2 1/2] drm/panel: panel-edp: Use dev_err_probe() to simplify code

[Yuan Can]

In the probe path, dev_err() can be replaced with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name. It also sets the defer probe reason which can be
checked later through debugfs.

Signed-off-by: Yuan Can <yuancan at huawei.com>
Reviewed-by: Douglas Anderson <dianders at chromium.org>
---
 drivers/gpu/drm/panel/panel-edp.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 7b90016b8408..e323a6331143 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -403,17 +403,10 @@ static int panel_edp_unprepare(struct drm_panel *panel)
 
 static int panel_edp_get_hpd_gpio(struct device *dev, struct panel_edp *p)
 {
-	int err;
-
 	p->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
-	if (IS_ERR(p->hpd_gpio)) {
-		err = PTR_ERR(p->hpd_gpio);
-
-		if (err != -EPROBE_DEFER)
-			dev_err(dev, "failed to get 'hpd' GPIO: %d\n", err);
-
-		return err;
-	}
+	if (IS_ERR(p->hpd_gpio))
+		return dev_err_probe(dev, PTR_ERR(p->hpd_gpio),
+				     "failed to get 'hpd' GPIO\n");
 
 	return 0;
 }
@@ -832,12 +825,9 @@ static int panel_edp_probe(struct device *dev, const struct panel_desc *desc,
 
 	panel->enable_gpio = devm_gpiod_get_optional(dev, "enable",
 						     GPIOD_OUT_LOW);
-	if (IS_ERR(panel->enable_gpio)) {
-		err = PTR_ERR(panel->enable_gpio);
-		if (err != -EPROBE_DEFER)
-			dev_err(dev, "failed to request GPIO: %d\n", err);
-		return err;
-	}
+	if (IS_ERR(panel->enable_gpio))
+		return dev_err_probe(dev, PTR_ERR(panel->enable_gpio),
+				     "failed to request GPIO\n");
 
 	err = of_drm_get_panel_orientation(dev->of_node, &panel->orientation);
 	if (err) {
-- 
2.17.1