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Subject[PATCH] drm: xlnx: dp: Reset DisplayPort IP
Date
Assert DisplayPort reset signal before deasserting,
it is to clear out any registers programmed before booting kernel.

Signed-off-by: Rohit Visavalia <rohit.visavalia@amd.com>
---
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

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