From 681b6b94338f2ac8cc35e45ac5f84737b92357c3 Mon Sep 17 00:00:00 2001 From: Jianqun Xu Date: Sun, 11 Sep 2016 18:26:42 +0800 Subject: rockchip: rk3399: improve write leveling flow To improve sdram 800MHz and 933MHz stability, we need to modify write leveling flow to get the proper write leveling value. BUG=chrome-os-partner:56940 BRANCH=none TEST=Boot from kevin on 933MHz, and do stressapptest Change-Id: I5b24c93d4a57917fb9af7e5e2a95d8423ccbaa7e Signed-off-by: Patrick Georgi Original-Commit-Id: d84bf25b3e5de373c7913e6d534a810cb984b3fd Original-Change-Id: I87efddf628c3683fcb85d6875e029cf3cbc482be Original-Signed-off-by: Jianqun Xu Original-Signed-off-by: Xing Zheng Original-Signed-off-by: Lin Huang Original-Reviewed-on: https://chromium-review.googlesource.com/384292 Original-Commit-Ready: Julius Werner Original-Tested-by: Julius Werner Original-Reviewed-by: Julius Werner Reviewed-on: https://review.coreboot.org/16716 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/mainboard/google/gru/sdram_configs.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) (limited to 'src/mainboard/google/gru/sdram_configs.c') diff --git a/src/mainboard/google/gru/sdram_configs.c b/src/mainboard/google/gru/sdram_configs.c index 1235eff924..2aa05a7f7d 100644 --- a/src/mainboard/google/gru/sdram_configs.c +++ b/src/mainboard/google/gru/sdram_configs.c @@ -50,14 +50,10 @@ static enum dram_speeds get_sdram_index(void) if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN)) switch (id) { - case 0: - case 1: - case 2: - return dram_200MHz; - case 3: - return dram_666MHz_NO_ODT; - default: + case 4: return dram_800MHz; + default: + return dram_933MHz; } if (IS_ENABLED(CONFIG_BOARD_GOOGLE_GRU)) -- cgit v1.2.3