GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

soc/mediatek/mt8183: Adjust DRAM voltages for each DRAM frequency 

This patch supports voltage adjustment for each DRAM frequency, which is
neccesary to support DVFS switch.

BUG=b:80501386,b:142358843
BRANCH=none
TEST=Boots correctly and stress test pass on Kukui.

Change-Id: I9539473ff708f9d0d39eb17bd3fdcb916265d33e
Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35017
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
This commit is contained in:
Huayang Duan 2019-08-21 21:34:23 +08:00 committed by Patrick Georgi
parent 0d0b7a1a57
commit 107927b319
1 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
src/soc/mediatek/mt8183/emi.c
View File

@ -19,6 +19,7 @@
#include <soc/dramc_register.h>
#include <soc/emi.h>
#include <soc/infracfg.h>
#include <soc/mt6358.h>
static const u8 freq_shuffle[DRAM_DFS_SHUFFLE_MAX] = {
[DRAM_DFS_SHUFFLE_1] = LP4X_DDR3200,
@ -39,6 +40,13 @@ u32 frequency_table[LP4X_DDRFREQ_MAX] = {
[LP4X_DDR3600] = 3600,
};
static const u32 vcore_lp4x[LP4X_DDRFREQ_MAX] = {
[LP4X_DDR1600] = 725000,
[LP4X_DDR2400] = 725000,
[LP4X_DDR3200] = 762500,
[LP4X_DDR3600] = 800000,
};
struct emi_regs *emi_regs = (void *)EMI_BASE;
const u8 phy_mapping[CHANNEL_MAX][16] = {
[CHANNEL_A] = {
@ -180,6 +188,24 @@ static void global_option_init(const struct sdram_params *params)
set_MRR_pinmux_mapping();
}
static void set_vcore_voltage(u8 freq_group)
{
const u32 vcore = vcore_lp4x[freq_group];
dramc_dbg("Set DRAM voltage (freq %d): vcore = %u\n",
frequency_table[freq_group], vcore);
pmic_set_vcore_vol(vcore);
}
static void set_vdram1_vddq_voltage(void)
{
const u32 vdram1 = 1125000;
const u32 vddq = 600000;
dramc_dbg("Set DRAM voltage: vdram1 = %u, vddq = %u\n",
vdram1, vddq);
pmic_set_vdram1_vol(vdram1);
pmic_set_vddq_vol(vddq);
}
static void emi_esl_setting1(void)
{
dramc_set_broadcast(DRAMC_BROADCAST_ON);
@ -373,6 +399,8 @@ int mt_set_emi(const struct dramc_param *dparam)
current_freqsel = freq_tbl[shuffle];
params = &dparam->freq_params[shuffle];
set_vcore_voltage(current_freqsel);
set_vdram1_vddq_voltage();
init_dram(params, current_freqsel);
if (do_calib(params, current_freqsel) != 0)
return -1;