From e6ac20b9d019a90ecaf330cebba94a1fe690db62 Mon Sep 17 00:00:00 2001 From: Huayang Duan Date: Tue, 24 Dec 2019 16:35:13 +0800 Subject: soc/mediatek/mt8183: Restore vcore after DRAM calibration DRAM calibration sets vcore to different voltages at different frequencies. After DRAM calibration, vcore should be restored to the default voltage, which is 800mV for both eMCP and discrete DDR devices. BRANCH=kukui BUG=b:146618163 TEST=bootup pass Change-Id: Ia87b4ac78a32dbd4c4ab52e84d307cb46525afa1 Signed-off-by: Huayang Duan Reviewed-on: https://review.coreboot.org/c/coreboot/+/37924 Tested-by: build bot (Jenkins) Reviewed-by: Hung-Te Lin Reviewed-by: Yu-Ping Wu --- src/soc/mediatek/mt8183/memory.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'src/soc') diff --git a/src/soc/mediatek/mt8183/memory.c b/src/soc/mediatek/mt8183/memory.c index 13c3d9ad36..78890ea3d2 100644 --- a/src/soc/mediatek/mt8183/memory.c +++ b/src/soc/mediatek/mt8183/memory.c @@ -21,6 +21,7 @@ #include #include #include +#include #include static int mt_mem_test(void) @@ -156,7 +157,7 @@ static void init_sdram_params(struct sdram_params *dst, memcpy(&dst[shuffle], src, sizeof(*dst)); } -void mt_mem_init(struct dramc_param_ops *dparam_ops) +static void mt_mem_init_run(struct dramc_param_ops *dparam_ops) { struct dramc_param *dparam = dparam_ops->param; @@ -202,6 +203,7 @@ void mt_mem_init(struct dramc_param_ops *dparam_ops) if (err == 0) { printk(BIOS_INFO, "Successfully loaded DRAM blobs and " "ran DRAM calibration\n"); + /* * In recovery mode the system boots in RO but the flash params * should be calibrated for RW so we can't mix them up. @@ -228,3 +230,11 @@ void mt_mem_init(struct dramc_param_ops *dparam_ops) if (mt_mem_test() != 0) die("Memory test failed with params from sdram config\n"); } + +void mt_mem_init(struct dramc_param_ops *dparam_ops) +{ + mt_mem_init_run(dparam_ops); + + /* After DRAM calibration, restore vcore voltage to default setting */ + pmic_set_vcore_vol(800000); +} -- cgit v1.2.3