From 1cb77d1425ac3594eb27d05f5acfa58ed2501c27 Mon Sep 17 00:00:00 2001 From: Mark Hsieh Date: Tue, 28 Jun 2022 18:26:37 +0800 Subject: mb/google/brya/var/gimble: Disable PCH USB2 phy power gating The patch disables PCH USB2 Phy power gating to prevent possible display flicker issue for primus board. Please refer Intel doc#723158 for more information. BUG=b:237421399 TEST=Verify the build for gimble board Signed-off-by: Mark Hsieh Change-Id: Ie66c9679c985215ad7f1a5ae76560b839ea95702 Reviewed-on: https://review.coreboot.org/c/coreboot/+/65474 Reviewed-by: Tim Wawrzynczak Tested-by: build bot (Jenkins) --- src/mainboard/google/brya/variants/gimble/overridetree.cb | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src/mainboard/google/brya/variants/gimble/overridetree.cb') diff --git a/src/mainboard/google/brya/variants/gimble/overridetree.cb b/src/mainboard/google/brya/variants/gimble/overridetree.cb index 07458e9a8d..a149c33101 100644 --- a/src/mainboard/google/brya/variants/gimble/overridetree.cb +++ b/src/mainboard/google/brya/variants/gimble/overridetree.cb @@ -31,6 +31,10 @@ chip soc/intel/alderlake register "fast_pkg_c_ramp_disable[VR_DOMAIN_IA]" = "1" register "fast_pkg_c_ramp_disable[VR_DOMAIN_GT]" = "1" + # As per Intel Advisory doc#723158, the change is required to prevent possible + # display flickering issue. + register "usb2_phy_sus_pg_disable" = "1" + register "typec_aux_bias_pads[0]" = "{.pad_auxp_dc = GPP_E22, .pad_auxn_dc = GPP_E23}" register "usb2_ports[1]" = "USB2_PORT_MAX_TYPE_C(OC1)" # set MAX to USB2_C1 for eye diagram register "usb2_ports[2]" = "USB2_PORT_EMPTY" # Disable USB2_C2 -- cgit v1.2.3