From b5995924b3ca7c31073c15ec38b4e492a0b38e1e Mon Sep 17 00:00:00 2001
From: Shunqing Chen <csq@rock-chips.com>
Date: Thu, 27 May 2021 19:39:09 +0800
Subject: [PATCH] drm: rockchip: rk618: hpd io pull down

Signed-off-by: Shunqing Chen <csq@rock-chips.com>
Change-Id: I309bc695dbd94281880ce934415c1864c5abc8c8
---
 drivers/gpu/drm/rockchip/rk618/rk618_hdmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rk618/rk618_hdmi.c b/drivers/gpu/drm/rockchip/rk618/rk618_hdmi.c
index 12c9475e9d80..678b527a831a 100644
--- a/drivers/gpu/drm/rockchip/rk618/rk618_hdmi.c
+++ b/drivers/gpu/drm/rockchip/rk618/rk618_hdmi.c
@@ -1521,6 +1521,9 @@ static int rk618_hdmi_probe(struct platform_device *pdev)
 		return PTR_ERR(hdmi->clock);
 	}
 
+	/* hpd io pull down */
+	regmap_write(rk618->regmap, RK618_IO_CON0, HDMI_IO_PULL_UP_DISABLE);
+
 	rk618_hdmi_pol_init(hdmi, 0);
 	rk618_hdmi_reset(hdmi);