From 46009ea4ccf861754290321936eb0fb7769ba772 Mon Sep 17 00:00:00 2001 From: Yu-Ping Wu Date: Thu, 17 Oct 2019 13:38:32 +0800 Subject: soc/mediatek/mt8183: Force DRAM retraining if hotkey pressed Similar to MRC cache on x86 platforms, when a hotkey is pressed during boot, the calibration data cache saved in the flash will be cleared, consequently triggering DRAM retraining (full calibration) in the next boot. BRANCH=kukui BUG=b:139099592 TEST=emerge-kukui coreboot Change-Id: I2f9225f359e1fe5733e8e1c48b396aaeeb9a58ab Signed-off-by: Yu-Ping Wu Reviewed-on: https://review.coreboot.org/c/coreboot/+/36090 Tested-by: build bot (Jenkins) Reviewed-by: Hung-Te Lin --- src/soc/mediatek/mt8183/memory.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src') diff --git a/src/soc/mediatek/mt8183/memory.c b/src/soc/mediatek/mt8183/memory.c index 2e6391339c..2a4ebbdd1f 100644 --- a/src/soc/mediatek/mt8183/memory.c +++ b/src/soc/mediatek/mt8183/memory.c @@ -169,6 +169,12 @@ void mt_mem_init(struct dramc_param_ops *dparam_ops) /* Load calibration params from flash and run fast calibration */ if (recovery_mode) { printk(BIOS_WARNING, "Skip loading cached calibration data\n"); + if (vboot_recovery_mode_memory_retrain()) { + printk(BIOS_WARNING, "Retrain memory in next boot\n"); + /* Use 0xFF as erased flash data. */ + memset(dparam, 0xff, sizeof(*dparam)); + dparam_ops->write_to_flash(dparam); + } } else if (dparam_ops->read_from_flash(dparam)) { printk(BIOS_INFO, "DRAM-K: Fast Calibration\n"); if (dram_run_fast_calibration(dparam, config) == 0) { -- cgit v1.2.3