The enable signal may not be controllable by the kernel. Make it
optional.
This is a similar to commit bbda1704fc15 ("drm/bridge: ti-sn65dsi86: Make
enable GPIO optional")

Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Reviewed-by: Sam Ravnborg <s...@ravnborg.org>
Signed-off-by: Alexander Stein <alexander.st...@ew.tq-group.com>
---
 drivers/gpu/drm/bridge/ti-sn65dsi83.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c 
b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
index 945f08de45f1..065610edc37a 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
@@ -662,7 +662,8 @@ static int sn65dsi83_probe(struct i2c_client *client,
        }
 
        /* Put the chip in reset, pull EN line low, and assure 10ms reset low 
timing. */
-       ctx->enable_gpio = devm_gpiod_get(ctx->dev, "enable", GPIOD_OUT_LOW);
+       ctx->enable_gpio = devm_gpiod_get_optional(ctx->dev, "enable",
+                                                  GPIOD_OUT_LOW);
        if (IS_ERR(ctx->enable_gpio))
                return PTR_ERR(ctx->enable_gpio);
 
-- 
2.25.1

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