diff options
| author | Yu-Ping Wu <yupingso@chromium.org> | 2019-10-29 16:20:35 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-10-31 10:31:58 +0000 |
| commit | 02d9071a0b4d0720dde569de9550c17d89bc100a (patch) | |
| tree | d378c80e9a7f115ef99f33f89876a7a80e3dab45 /src/soc/mediatek | |
| parent | 7d9d63b79f331d6a9c613bce03d6e09ef8745bbe (diff) | |
| download | coreboot-02d9071a0b4d0720dde569de9550c17d89bc100a.tar.xz | |
soc/mediatek/mt8183: Disable DRAM DVFS in recovery mode
Currently full calibration with DVFS (which implies tripling memory
training time for multiple frequencies) will be run in recovery mode,
which takes up to 30 seconds with serial console enabled.
However, in recovery mode the system should be running only the recovery
programs with minimal services. DVFS should be not needed.
In order to improve stability and system boot time, we want to disable
DVFS training in recovery mode.
BRANCH=kukui
BUG=b:142358843
TEST=emerge-kukui coreboot
Change-Id: I4f1b1b020eba9bfce21655169bcb31b98d54b010
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36456
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/mediatek')
| -rw-r--r-- | src/soc/mediatek/mt8183/emi.c | 2 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8183/include/soc/dramc_param.h | 3 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8183/memory.c | 4 |
3 files changed, 7 insertions, 2 deletions
diff --git a/src/soc/mediatek/mt8183/emi.c b/src/soc/mediatek/mt8183/emi.c index 93e92aceef..7cd631ca0b 100644 --- a/src/soc/mediatek/mt8183/emi.c +++ b/src/soc/mediatek/mt8183/emi.c @@ -531,7 +531,7 @@ int mt_set_emi(const struct dramc_param *dparam) bool first_run = true; set_vdram1_vddq_voltage(); - if (CONFIG(MT8183_DRAM_DVFS)) { + if (dparam->header.config & DRAMC_CONFIG_DVFS) { if (run_calib(dparam, &shared, DRAM_DFS_SHUFFLE_3, &first_run) != 0) return -1; diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_param.h b/src/soc/mediatek/mt8183/include/soc/dramc_param.h index 564b43df9d..1f4148bc8d 100644 --- a/src/soc/mediatek/mt8183/include/soc/dramc_param.h +++ b/src/soc/mediatek/mt8183/include/soc/dramc_param.h @@ -23,7 +23,7 @@ enum { DRAMC_PARAM_HEADER_MAGIC = 0x44524d4b, - DRAMC_PARAM_HEADER_VERSION = 1, + DRAMC_PARAM_HEADER_VERSION = 2, }; enum DRAMC_PARAM_STATUS_CODES { @@ -43,6 +43,7 @@ enum DRAMC_PARAM_STATUS_CODES { /* Bit flags */ enum DRAMC_PARAM_CONFIG { DRAMC_CONFIG_EMCP = 0x0001, + DRAMC_CONFIG_DVFS = 0x0002, }; enum DRAMC_PARAM_FLAGS { diff --git a/src/soc/mediatek/mt8183/memory.c b/src/soc/mediatek/mt8183/memory.c index b9ed619a8e..13c3d9ad36 100644 --- a/src/soc/mediatek/mt8183/memory.c +++ b/src/soc/mediatek/mt8183/memory.c @@ -166,6 +166,10 @@ void mt_mem_init(struct dramc_param_ops *dparam_ops) const bool recovery_mode = vboot_recovery_mode_enabled(); + /* DRAM DVFS is disabled in recovery mode */ + if (CONFIG(MT8183_DRAM_DVFS) && !recovery_mode) + config |= DRAMC_CONFIG_DVFS; + /* Load calibration params from flash and run fast calibration */ if (recovery_mode) { printk(BIOS_WARNING, "Skip loading cached calibration data\n"); |