experimental: add improved dvb table (+ conversion script)

Source/scripts/convert_dvb.cpp

@@ -0,0 +1,95 @@
+#include <cstdio>
+#include <cstdint>
+#include <iterator>
+
+typedef uint32_t u32;
+typedef int32_t s32;
+
+struct DvbEntry {
+    u32 freq;
+    u32 volts[3];
+};
+
+DvbEntry oldDvbTable[] = {
+    {  204000, { 637, 637, 637, }, },
+    { 1331200, { 650, 637, 637, }, },
+    { 1600000, { 675, 650, 637, }, },
+    { 1866000, { 700, 675, 650, }, },
+    { 2133000, { 725, 700, 675, }, },
+    { 2400000, { 750, 725, 700, }, },
+    { 2666000, { 775, 750, 725, }, },
+    { 2933000, { 800, 775, 750, }, },
+    { 3200000, { 800, 800, 775, }, },
+};
+
+DvbEntry newDvbTable[] = {
+    {  204000, {  637,  637,  637, }, },
+    { 1331200, {  650,  637,  637, }, },
+    { 1600000, {  675,  650,  637, }, },
+    { 1866000, {  700,  675,  650, }, },
+    { 2133000, {  725,  700,  675, }, },
+    { 2400000, {  750,  725,  700, }, },
+    { 2666000, {  850,  825,  800, }, },
+    { 2933000, {  950,  925,  900, }, },
+    { 3200000, { 1050, 1025, 1000, }, },
+};
+
+constexpr u32 DvbTableSize = std::size(oldDvbTable);
+
+u32 PrintAndScan(const char *message) {
+    u32 scanV;
+    printf("%s: ", message);
+    scanf("%i", &scanV);
+    return scanV;
+}
+
+u32 GetProcessId(u32 speedo) {
+    if (speedo <= 1597) {
+        return 0;
+    }
+
+    if (speedo <= 1708) {
+        return 1;
+    }
+
+    /* >= 1709. */
+    return 2;
+}
+
+u32 GetVoltageAndIndex(u32 dvbShift, u32 emc, u32 processId, DvbEntry *dvbTable, u32 &index) {
+    for (u32 i = 0; i < DvbTableSize - 1; ++i) {
+        if (emc < dvbTable[i].freq || emc >= dvbTable[i + 1].freq) {
+            continue;
+        }
+
+        index = i;
+        return dvbTable[i].volts[processId] + (25 * dvbShift);
+    }
+
+    return 0;
+}
+
+s32 GetShift(u32 oldVoltage, u32 processId, DvbEntry *dvbTable, u32 index) {
+    return (oldVoltage - dvbTable[index].volts[processId]) / 25;
+}
+
+int main() {
+    u32 oldDvb    = PrintAndScan("Enter old dvb shift");
+    u32 emcMaxMhz = PrintAndScan("Enter max ram freq (MHz)");
+    u32 speedo    = PrintAndScan("Enter soc speedo");
+
+    u32 emcMaxKhz = emcMaxMhz * 1000;
+    u32 processId = GetProcessId(speedo);
+
+    u32 tableIndex = 0;
+    u32 oldVoltage = GetVoltageAndIndex(oldDvb, emcMaxKhz, processId, oldDvbTable, tableIndex);
+
+    if (oldVoltage == 0 || tableIndex == 0) {
+        printf("Invalid values!\n");
+        return -1;
+    }
+
+    s32 newShift = GetShift(oldVoltage, processId, newDvbTable, tableIndex);
+
+    printf("New dvb table shift: %d", newShift);
+}

Source/scripts/convert_dvb.py

@@ -0,0 +1,112 @@
+from dataclasses import dataclass
+from typing import List
+
+
+u32 = int
+s32 = int
+
+
+@dataclass
+class DvbEntry:
+    freq: u32
+    volts: List[u32]
+
+
+old_dvb_table = [
+    DvbEntry(204000,  [637, 637, 637]),
+    DvbEntry(1331200, [650, 637, 637]),
+    DvbEntry(1600000, [675, 650, 637]),
+    DvbEntry(1866000, [700, 675, 650]),
+    DvbEntry(2133000, [725, 700, 675]),
+    DvbEntry(2400000, [750, 725, 700]),
+    DvbEntry(2666000, [775, 750, 725]),
+    DvbEntry(2933000, [800, 775, 750]),
+    DvbEntry(3200000, [800, 800, 775]),
+]
+
+new_dvb_table = [
+    DvbEntry(204000,  [637, 637, 637]),
+    DvbEntry(1331200, [650, 637, 637]),
+    DvbEntry(1600000, [675, 650, 637]),
+    DvbEntry(1866000, [700, 675, 650]),
+    DvbEntry(2133000, [725, 700, 675]),
+    DvbEntry(2400000, [750, 725, 700]),
+    DvbEntry(2666000, [850, 825, 800]),
+    DvbEntry(2933000, [950, 925, 900]),
+    DvbEntry(3200000, [1050, 1025, 1000]),
+]
+
+DVB_TABLE_SIZE = len(old_dvb_table)
+
+
+def print_and_scan(message: str) -> u32:
+    return int(input(f"{message}: "))
+
+
+def get_process_id(speedo: u32) -> u32:
+    if speedo <= 1597:
+        return 0
+
+    if speedo <= 1708:
+        return 1
+
+    # >= 1709
+    return 2
+
+
+def get_voltage_and_index(
+    dvb_shift: u32,
+    emc: u32,
+    process_id: u32,
+    dvb_table: List[DvbEntry],
+):
+    for i in range(DVB_TABLE_SIZE - 1):
+        if emc < dvb_table[i].freq or emc >= dvb_table[i + 1].freq:
+            continue
+
+        voltage = dvb_table[i].volts[process_id] + (25 * dvb_shift)
+        return voltage, i
+
+    return 0, 0
+
+
+def get_shift(
+    old_voltage: u32,
+    process_id: u32,
+    dvb_table: List[DvbEntry],
+    index: u32,
+) -> s32:
+    return (old_voltage - dvb_table[index].volts[process_id]) // 25
+
+
+def main():
+    old_dvb = print_and_scan("Enter old dvb shift")
+    emc_max_mhz = print_and_scan("Enter max ram freq (MHz)")
+    speedo = print_and_scan("Enter soc speedo")
+
+    emc_max_khz = emc_max_mhz * 1000
+    process_id = get_process_id(speedo)
+
+    old_voltage, table_index = get_voltage_and_index(
+        old_dvb,
+        emc_max_khz,
+        process_id,
+        old_dvb_table,
+    )
+
+    if old_voltage == 0 or table_index == 0:
+        print("Invalid values!")
+        return
+
+    new_shift = get_shift(
+        old_voltage,
+        process_id,
+        new_dvb_table,
+        table_index,
+    )
+
+    print(f"New dvb table shift: {new_shift}")
+
+
+if __name__ == "__main__":
+    main()