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>

diff --git a/board/gdsys/common/dp501.c b/board/gdsys/common/dp501.c
index baace38ad699638dfd26782d6c09b137f94be435..0389fd1750a558cb4c052fa731e143f77c2bd890 100644 (file)
--- 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");