From: Dirk Eibach Date: Wed, 28 Oct 2015 10:46:26 +0000 (+0100) Subject: board: gdsys: Increase DP501 I2C retry interval X-Git-Tag: v2016.01-rc1~30 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=2302fd32a5c2015be204e71737481322fe7b5f3a;p=oweals%2Fu-boot.git 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 Reviewed-by: Heiko Schocher --- 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");