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authorYu-Ping Wu <yupingso@chromium.org>2019-10-17 13:38:32 +0800
committerPatrick Georgi <pgeorgi@google.com>2019-10-21 09:14:47 +0000
commit46009ea4ccf861754290321936eb0fb7769ba772 (patch)
tree77d7b8bce7ca3815f553b91f7201a0cf16658726
parent998a3cc0dab5e73ae2a169aeb04df6b4db4f968a (diff)
downloadcoreboot-46009ea4ccf861754290321936eb0fb7769ba772.tar.xz
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 <yupingso@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36090 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org>
-rw-r--r--src/soc/mediatek/mt8183/memory.c6
1 files changed, 6 insertions, 0 deletions
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) {