From 2302fd32a5c2015be204e71737481322fe7b5f3a Mon Sep 17 00:00:00 2001
From: Dirk Eibach <dirk.eibach@gdsys.cc>
Date: Wed, 28 Oct 2015 11:46:26 +0100
Subject: [PATCH] board: gdsys: Increase DP501 I2C retry interval
With Club 3D dual link adapter there are AUX-channel timeouts
when EDID is read. Increasing retry interval time to max (400us)
fixes this.
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Reviewed-by: Heiko Schocher <hs@denx.de>
---
board/gdsys/common/dp501.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/board/gdsys/common/dp501.c b/board/gdsys/common/dp501.c
index baace38ad6..0389fd1750 100644
--- a/board/gdsys/common/dp501.c
+++ b/board/gdsys/common/dp501.c
@@ -88,7 +88,8 @@ void dp501_powerup(u8 addr)
dp501_setbits(addr, 0x78, 0x03); /* clear all interrupt */
i2c_reg_write(addr, 0x75, 0xf8); /* aux channel reset */
i2c_reg_write(addr, 0x75, 0x00); /* clear aux channel reset */
- i2c_reg_write(addr, 0x87, 0x70); /* set retry counter as 7 */
+ i2c_reg_write(addr, 0x87, 0x7f); /* set retry counter as 7
+ retry interval 400us */
if (dp501_detect_cable_adapter(addr)) {
printf("DVI/HDMI cable adapter detected\n");
--
2.39.5