diff options
Diffstat (limited to 'plat/imx/common/imx8m/dram.c')
| -rw-r--r-- | plat/imx/common/imx8m/dram.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/plat/imx/common/imx8m/dram.c b/plat/imx/common/imx8m/dram.c index e00ca96d..df34c4b0 100644 --- a/plat/imx/common/imx8m/dram.c +++ b/plat/imx/common/imx8m/dram.c @@ -67,13 +67,17 @@ void dram_phy_init(void) } } + void dram_info_init(unsigned long dram_timing_base) { - uint32_t current_fsp, ddr_type; + uint32_t current_fsp, ddr_type, ddrc_mstr; /* get the dram type */ - ddr_type = mmio_read_32(DDRC_MSTR(0)) & DDR_TYPE_MASK; + ddrc_mstr = mmio_read_32(DDRC_MSTR(0)); + ddr_type = ddrc_mstr & DDR_TYPE_MASK; + dram_info.dram_type = ddr_type; + dram_info.num_rank = (ddrc_mstr >> 24) & DDRC_ACTIVE_RANK_MASK; /* init the boot_fsp & current_fsp */ current_fsp = mmio_read_32(DDRC_DFIMISC(0)); @@ -93,6 +97,10 @@ void dram_info_init(unsigned long dram_timing_base) dcsw_op_all(DCCSW); lpddr4_swffc(dev_fsp, 0x0); dev_fsp = (~dev_fsp) & 0x1; + } else if (ddr_type == DDRC_DDR4 && current_fsp != 0x0) { + /* flush the L1/L2 cache */ + dcsw_op_all(DCCSW); + ddr4_swffc(&dram_info, 0x0); } } @@ -122,10 +130,6 @@ int dram_dvfs_handler(uint32_t smc_fid, unsigned int target_freq = x1; uint32_t online_cores = x2; - /* TODO add ddr4 dvfs support later */ - if (dram_info.dram_type != DDRC_LPDDR4) - return 0; - if (target_freq == 0xf) { /* set the WFE done status */ spin_lock(&dfs_lock); @@ -159,8 +163,12 @@ int dram_dvfs_handler(uint32_t smc_fid, /* flush the L1/L2 cache */ dcsw_op_all(DCCSW); - lpddr4_swffc(dev_fsp, target_freq); - dev_fsp = (~dev_fsp) & 0x1; + if (dram_info.dram_type == DDRC_LPDDR4) { + lpddr4_swffc(dev_fsp, target_freq); + dev_fsp = (~dev_fsp) & 0x1; + } else if (dram_info.dram_type == DDRC_DDR4) { + ddr4_swffc(&dram_info, target_freq); + } wait_ddrc_hwffc_done = false; wfe_done = 0; |