From f3772f357c14fc43c4aea7c90c0e27aa62b5fca7 Mon Sep 17 00:00:00 2001
From: Wyon Bi <bivvy.bi@rock-chips.com>
Date: Mon, 26 Oct 2020 11:13:08 +0800
Subject: [PATCH] drm/rockchip/rk628: dsi: Fix volatile register offset

Change-Id: Icc6775a9ff4b4bf267866a242b7427f8b228a23c
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
---
 drivers/gpu/drm/rockchip/rk628/rk628_dsi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rk628/rk628_dsi.c b/drivers/gpu/drm/rockchip/rk628/rk628_dsi.c
index c437342a41d4..296b19a5924a 100644
--- a/drivers/gpu/drm/rockchip/rk628/rk628_dsi.c
+++ b/drivers/gpu/drm/rockchip/rk628/rk628_dsi.c
@@ -1227,6 +1227,8 @@ static const struct regmap_config testif_regmap_config = {
 
 static bool rk628_dsi_register_volatile(struct device *dev, unsigned int reg)
 {
+	reg &= 0xffff;
+
 	switch (reg) {
 	case DSI_GEN_HDR:
 	case DSI_GEN_PLD_DATA: