From 73cd3e704fde61e287f6fbdd6d371ed19e41f15d Mon Sep 17 00:00:00 2001 From: Ravi Sarawadi Date: Wed, 2 Sep 2020 07:03:47 -0700 Subject: mb/google/delbin: Configure DP_HPD as PAD_NC and disable DdiPortHpd GPP_A19(DP_HPD1) and GPP_A20(DP_HPD2) were configured native function (NF1) without internal pull-down which wrongly presents HPD interrupts. DP_HPD had been removed for EVT design as those events are through eSPI. This change configures GPP_A19 and GPP_A20 to be no connection and disables DdiPort1Hpd and DdiPort2Hpd. BUG=b:162566436 TEST=Booted to kernel and verified no kernel HPD pins assertion message on Delbin board. Signed-off-by: Ravi Sarawadi Change-Id: Ifdef8ee438276678258b75d2fb70c6dfc7ee0a33 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45031 Tested-by: build bot (Jenkins) Reviewed-by: Caveh Jalali --- src/mainboard/google/volteer/variants/delbin/overridetree.cb | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/mainboard/google/volteer/variants/delbin/overridetree.cb') diff --git a/src/mainboard/google/volteer/variants/delbin/overridetree.cb b/src/mainboard/google/volteer/variants/delbin/overridetree.cb index fc549c75e1..05c8a34509 100644 --- a/src/mainboard/google/volteer/variants/delbin/overridetree.cb +++ b/src/mainboard/google/volteer/variants/delbin/overridetree.cb @@ -1,4 +1,7 @@ chip soc/intel/tigerlake + register "DdiPort1Hpd" = "0" + register "DdiPort2Hpd" = "0" + device domain 0 on device pci 15.0 on chip drivers/i2c/generic -- cgit v1.2.3