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board: gdsys: Increase DP501 I2C retry interval

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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>
This commit is contained in:
Dirk Eibach 2015-10-28 11:46:26 +01:00 committed by Tom Rini
parent 0caad193cd
commit 2302fd32a5
1 changed files with 2 additions and 1 deletions
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3
board/gdsys/common/dp501.c
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@ -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");