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

vendorcode/mt8192: limit fast-k frequency count from 7 to 3 

For bootup faster, fast-k elapsed time is improved by ~400ms.

Signed-off-by: Xi Chen <xixi.chen@mediatek.com>
Change-Id: Ifa945012aa66df4433fe63aab75a1e785d343d9d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51406
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Xi Chen 2021-03-11 17:31:27 +08:00 committed by Hung-Te Lin
parent 46d05bcc4e
commit 995eed9fef
1 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
src/vendorcode/mediatek/mt8192/dramc/dramc_pi_main.c
View File

@ -12,6 +12,7 @@
#include "dramc_pi_api.h"
#include <soc/dramc_param.h>
#include <soc/emi.h>
#include <types.h>
DRAMC_CTX_T dram_ctx_chb;
@ -1299,6 +1300,7 @@ int Init_DRAM(DRAM_DRAM_TYPE_T dram_type, DRAM_CBT_MODE_EXTERN_T dram_cbt_mode_e
DRAMC_CTX_T * p;
U8 final_shu;
DRAM_DFS_FREQUENCY_TABLE_T *first_cali_freq_tbl;
#ifdef DDR_INIT_TIME_PROFILING
U32 CPU_Cycle;
@ -1403,11 +1405,12 @@ int Init_DRAM(DRAM_DRAM_TYPE_T dram_type, DRAM_CBT_MODE_EXTERN_T dram_cbt_mode_e
// DramC & PHY init for all channels
//=== First frequency ======
first_cali_freq_tbl = &gFreqTbl[DRAM_DFS_SHUFFLE_MAX-1];
#if defined(DUMP_INIT_RG_LOG_TO_DE)
vSetDFSFreqSelByTable(p, &gFreqTbl[1]); //0:3200 1:4266, 2:800, 3:1866, 4:1200, 5:2400, 6:1600
#else
vSetDFSFreqSelByTable(p, &gFreqTbl[DRAM_DFS_SHUFFLE_MAX-1]);
vSetDFSFreqSelByTable(p, first_cali_freq_tbl);
//vSetDFSFreqSelByTable(p, &gFreqTbl[1]);
#endif
//#if (ENABLE_DRAM_SINGLE_FREQ_SELECT != 0xFF) || defined(FIRST_BRING_UP) || (__FLASH_TOOL_DA__)
@ -1509,6 +1512,16 @@ int Init_DRAM(DRAM_DRAM_TYPE_T dram_type, DRAM_CBT_MODE_EXTERN_T dram_cbt_mode_e
#endif
S8 u1ShuIdx;
S8 allCaliShuIdx = 0xFF;
if (CONFIG(MEDIATEK_DRAM_DVFS_LIMIT_FREQ_CNT)) {
if (p->DRAMPinmux == PINMUX_DSC)
allCaliShuIdx = 0x61; // 3200, 2400, 1600
else
allCaliShuIdx = 0x43; // 3200, 4266, 1600
}
dramc_debug("all cali shu idx: 0x%x\n", allCaliShuIdx);
//#if (ENABLE_DRAM_SINGLE_FREQ_SELECT == 0xFF)
if (is_dvfs_enabled()) {
for (u1ShuIdx = DRAM_DFS_SHUFFLE_MAX - 2; u1ShuIdx >= DRAM_DFS_SHUFFLE_1; u1ShuIdx--)
@ -1518,6 +1531,13 @@ int Init_DRAM(DRAM_DRAM_TYPE_T dram_type, DRAM_CBT_MODE_EXTERN_T dram_cbt_mode_e
continue;
#endif
// ignore the calibration for shuffle which is not in allCaliShuIdx, just copy first cali shuffle data
if (!(allCaliShuIdx & BIT(u1ShuIdx))) {
// copy first calibration shuffle to this shuffle (if DVFS, need double confirm)
DramcSaveToShuffleSRAM(p, DRAM_DFS_SHUFFLE_1, gFreqTbl[u1ShuIdx].shuffleIdx);
continue;
}
vSetDFSFreqSelByTable(p, &gFreqTbl[u1ShuIdx]);
#if SUPPORT_SAVE_TIME_FOR_CALIBRATION
DramcSave_Time_For_Cal_Init(p);