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Code Issues Releases Activity

l4t: add fine tuned voltage support for DRAM

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1000-1175mV for T210 VDDIO/Q via `ram_oc_vdd2`
1000-1175mV for T210B01 VDDIO and 600-650mV for VDDQ via `ram_oc_vdd2` and `ram_oc_vddq`.
This commit is contained in:
CTCaer 2023-06-09 10:55:32 +03:00
parent b6e1e0d412
commit 84822726cb
1 changed files with 34 additions and 9 deletions
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35
bootloader/l4t/l4t.c
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@ -273,6 +273,8 @@ typedef struct _l4t_ctxt_t
char *ram_oc_txt;
int ram_oc_freq;
int ram_oc_vdd2;
int ram_oc_vddq;
u32 serial_port;
u32 sc7entry_size;
@ -280,9 +282,10 @@ typedef struct _l4t_ctxt_t
emc_table_t *mtc_table;
} l4t_ctxt_t;
#define DRAM_T210_OC_VOLTAGE 1187500
#define DRAM_T210_OC_THRESHOLD_FREQ 1862400
#define DRAM_VDD2_OC_MIN_VOLTAGE 1100
#define DRAM_VDD2_OC_MAX_VOLTAGE 1175
#define DRAM_VDDQ_OC_MIN_VOLTAGE 600
#define DRAM_VDDQ_OC_MAX_VOLTAGE 650
#define DRAM_T210B01_TBL_MAX_FREQ 1600000
// JEDEC frequency table.
@ -826,6 +829,12 @@ static void _l4t_bpmpfw_b01_config(l4t_ctxt_t *ctxt)
if (!ram_oc_divn)
ram_oc_divn = ram_oc_freq / 38400;
// Set DRAM voltage.
if (ctxt->ram_oc_vdd2)
max7762x_regulator_set_voltage(REGULATOR_SD1, ctxt->ram_oc_vdd2 * 1000);
if (ctxt->ram_oc_vddq)
max7762x_regulator_set_voltage(REGULATOR_RAM0, ctxt->ram_oc_vddq * 1000);
// Copy table and set parameters.
memcpy(BPMPFW_B01_DTB_EMC_TBL_OFFSET(tbl_idx), BPMPFW_B01_MTC_TABLE_OFFSET(mtc_idx, 2), BPMPFW_B01_MTC_FREQ_TABLE_SIZE);
@ -927,6 +936,22 @@ static void _l4t_set_config(l4t_ctxt_t *ctxt, const ini_sec_t *ini_sec, int entr
ctxt->ram_oc_txt = kv->val;
ctxt->ram_oc_freq = atoi(kv->val);
}
else if (!strcmp("ram_oc_vdd2", kv->key))
{
ctxt->ram_oc_vdd2 = atoi(kv->val);
if (ctxt->ram_oc_vdd2 > DRAM_VDD2_OC_MAX_VOLTAGE)
ctxt->ram_oc_vdd2 = DRAM_VDD2_OC_MAX_VOLTAGE;
else if (ctxt->ram_oc_vdd2 < DRAM_VDD2_OC_MIN_VOLTAGE)
ctxt->ram_oc_vdd2 = 0;
}
else if (!strcmp("ram_oc_vddq", kv->key))
{
ctxt->ram_oc_vddq = atoi(kv->val);
if (ctxt->ram_oc_vddq > DRAM_VDDQ_OC_MAX_VOLTAGE)
ctxt->ram_oc_vddq = DRAM_VDDQ_OC_MAX_VOLTAGE;
else if (ctxt->ram_oc_vddq < DRAM_VDDQ_OC_MIN_VOLTAGE)
ctxt->ram_oc_vddq = 0;
}
else if (!strcmp("uart_port", kv->key))
ctxt->serial_port = atoi(kv->val);
@ -1161,8 +1186,8 @@ void launch_l4t(const ini_sec_t *ini_sec, int entry_idx, int is_list, bool t210b
if (ctxt.mtc_table)
{
// Set DRAM voltage.
if (ctxt.ram_oc_freq > DRAM_T210_OC_THRESHOLD_FREQ)
max7762x_regulator_set_voltage(REGULATOR_SD1, DRAM_T210_OC_VOLTAGE);
if (ctxt.ram_oc_vdd2)
max7762x_regulator_set_voltage(REGULATOR_SD1, ctxt.ram_oc_vdd2 * 1000);
// Train the rest of the table, apply FSP WAR, set RAM to 800 MHz.
minerva_prep_boot_l4t(ctxt.ram_oc_freq);