From 249aede238050e6a6ab71d3c6fb72aa5b5d4e78f Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Fri, 23 Jun 2023 19:40:14 +0530 Subject: mb/google/rex: Avoid LPDDR5/x hang This patch avoids random hang issue observed after booted to OS on LPDD5/x platforms due to CLK not tuned properly in SAGV point 0, 2133MT/s. As per Intel doc 769410 the expected work around is to change SAGV point 0 from 2133 G4 to 3200 G4. BUG=b:287170545 TEST=Able to perform 500 power cycles on google/rex without any hang. Signed-off-by: Subrata Banik Change-Id: I02a9cadc075f396549703d7a008382e76268f865 Reviewed-on: https://review.coreboot.org/c/coreboot/+/76076 Reviewed-by: Eric Lai Reviewed-by: Kapil Porwal Reviewed-by: Lean Sheng Tan Tested-by: build bot (Jenkins) --- src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/mainboard/google/rex/variants') diff --git a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb index 5297ce28f4..0d639e3731 100644 --- a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb +++ b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb @@ -41,7 +41,7 @@ chip soc/intel/meteorlake register "sagv" = "SAGV_ENABLED" - register "sagv_freq_mhz[0]" = "2133" + register "sagv_freq_mhz[0]" = "3200" register "sagv_gear[0]" = "4" register "sagv_freq_mhz[1]" = "6000" -- cgit v1.2.3