drm/tegra: Fix gpiod_get_from_of_node() regression

That function now returns ERR_PTR instead of NULL if "hpd-gpio" is not
present in device-tree. The offending patch missed to adapt the Tegra's
DRM driver for the API change.

Fixes: 025bf37 ("gpio: Fix return value mismatch of function gpiod_get_from_of_node()")
Signed-off-by: Dmitry Osipenko <[email protected]>
Acked-by: Jon Hunter <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>

Author: digetx

drivers/gpu/drm/tegra/output.c

@@ -126,8 +126,12 @@ int tegra_output_probe(struct tegra_output *output)
 						       "nvidia,hpd-gpio", 0,
 						       GPIOD_IN,
 						       "HDMI hotplug detect");
-	if (IS_ERR(output->hpd_gpio))
-		return PTR_ERR(output->hpd_gpio);
+	if (IS_ERR(output->hpd_gpio)) {
+		if (PTR_ERR(output->hpd_gpio) != -ENOENT)
+			return PTR_ERR(output->hpd_gpio);
+
+		output->hpd_gpio = NULL;
+	}
 
 	if (output->hpd_gpio) {
 		err = gpiod_to_irq(output->hpd_gpio);