From b95215b608b7598b4b44546917b3d75a03a0e432 Mon Sep 17 00:00:00 2001 From: Vincent Palatin Date: Fri, 15 May 2015 14:02:35 -0700 Subject: ryu: set HPD as open-drain The HotPlug Detect signal generated by the PD stack in DisplayPort alternate mode is connected to a 1.8V GPIO on the T210 AP, we need to set the GPIO output as open-drain. Signed-off-by: Vincent Palatin BRANCH=none BUG=none TEST=manual, probe the level with a voltmeter and see 1.8V. Change-Id: I627befc61ed06c75dd7e32a8541bd6d8f8e95642 Reviewed-on: https://chromium-review.googlesource.com/271553 Reviewed-by: Alec Berg Commit-Queue: Vincent Palatin Tested-by: Vincent Palatin --- board/ryu/gpio.inc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/board/ryu/gpio.inc b/board/ryu/gpio.inc index 0cbf0b55a8..d7063ed653 100644 --- a/board/ryu/gpio.inc +++ b/board/ryu/gpio.inc @@ -76,7 +76,7 @@ GPIO(USBC_MUX_CONF0, D, 3, GPIO_OUT_LOW) GPIO(USBC_MUX_CONF1, D, 9, GPIO_OUT_LOW) GPIO(USBC_MUX_CONF2, E, 0, GPIO_OUT_LOW) -GPIO(USBC_DP_HPD, C, 1, GPIO_OUT_LOW) +GPIO(USBC_DP_HPD, C, 1, GPIO_ODR_LOW) /* Inputs */ GPIO(BOARD_ID0, E, 11, GPIO_INPUT) -- cgit v1.2.1