From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Sat, 24 Feb 2018 13:38:14 +0100
Subject: drm/vc4: Replace long HDMI udelay with usleep_range
Git-commit: d8eb9de42320a0d02bd12118a8ac51d14bcaf5e1
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Since we aren't in atomic context replace this long udelay with a
usleep_range.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/1519475894-11701-1-git-send-email-stefan.wahren@i2se.com

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -681,7 +681,7 @@ static void vc4_hdmi_encoder_enable(stru
 			   drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
 		HDMI_WRITE(VC4_HDMI_FIFO_CTL,
 			   drift | VC4_HDMI_FIFO_CTL_RECENTER);
-		udelay(1000);
+		usleep_range(1000, 1100);
 		HDMI_WRITE(VC4_HDMI_FIFO_CTL,
 			   drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
 		HDMI_WRITE(VC4_HDMI_FIFO_CTL,