[PATCH] drm: xlnx: dp: Reset DisplayPort IP

[Rohit Visavalia]

Assert DisplayPort reset signal before deasserting,
it is to clear out any registers programmed before booting kernel.

Signed-off-by: Rohit Visavalia <rohit.visavalia@xxxxxxx>
---
 drivers/gpu/drm/xlnx/zynqmp_dp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index 1846c4971fd8..5a40aa1d4283 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1714,6 +1714,10 @@ int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub)
 		goto err_free;
 	}
 
+	ret = zynqmp_dp_reset(dp, true);
+	if (ret < 0)
+		return ret;
+
 	ret = zynqmp_dp_reset(dp, false);
 	if (ret < 0)
 		goto err_free;
-- 
2.25.1