diff options
Diffstat (limited to 'src/soc/intel/apollolake')
| -rw-r--r-- | src/soc/intel/apollolake/include/soc/meminit.h | 1 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/meminit.c | 20 |
2 files changed, 15 insertions, 6 deletions
diff --git a/src/soc/intel/apollolake/include/soc/meminit.h b/src/soc/intel/apollolake/include/soc/meminit.h index 27b6556d12..31645a4dc4 100644 --- a/src/soc/intel/apollolake/include/soc/meminit.h +++ b/src/soc/intel/apollolake/include/soc/meminit.h @@ -81,6 +81,7 @@ enum { enum { ODT_A_B_HIGH_LOW = 0 << 1, ODT_A_B_HIGH_HIGH = 1 << 1, + nWR_24 = 1 << 5, }; /* Provide bit swizzling per DQS and byte swapping within a channel. */ diff --git a/src/soc/intel/apollolake/meminit.c b/src/soc/intel/apollolake/meminit.c index b0a5f4a534..9e6622cc1b 100644 --- a/src/soc/intel/apollolake/meminit.c +++ b/src/soc/intel/apollolake/meminit.c @@ -69,8 +69,10 @@ size_t iohole_in_mib(void) return 2 * (GiB / MiB); } -static void set_lpddr4_defaults(FSP_M_CONFIG *cfg) +static void set_lpddr4_defaults(FSP_M_CONFIG *cfg, int speed) { + uint8_t odt_config; + /* Enable memory down BGA since it's the only LPDDR4 packaging. */ cfg->Package = 1; cfg->MemoryDown = 1; @@ -122,10 +124,16 @@ static void set_lpddr4_defaults(FSP_M_CONFIG *cfg) /* Set CA ODT with default setting of ODT pins of LPDDR4 modules pulled up to 1.1V. */ - cfg->Ch0_OdtConfig = ODT_A_B_HIGH_HIGH; - cfg->Ch1_OdtConfig = ODT_A_B_HIGH_HIGH; - cfg->Ch2_OdtConfig = ODT_A_B_HIGH_HIGH; - cfg->Ch3_OdtConfig = ODT_A_B_HIGH_HIGH; + odt_config = ODT_A_B_HIGH_HIGH; + + /* Need to set correct Write-Recovery configuration based on speed. */ + if (IS_ENABLED(CONFIG_SOC_INTEL_GLK) && speed >= LP4_SPEED_2133) + odt_config |= nWR_24; + + cfg->Ch0_OdtConfig = odt_config; + cfg->Ch1_OdtConfig = odt_config; + cfg->Ch2_OdtConfig = odt_config; + cfg->Ch3_OdtConfig = odt_config; } struct speed_mapping { @@ -205,7 +213,7 @@ void meminit_lpddr4(FSP_M_CONFIG *cfg, int speed) printk(BIOS_INFO, "LP4DDR speed is %dMHz\n", speed); cfg->Profile = fsp_memory_profile(speed); - set_lpddr4_defaults(cfg); + set_lpddr4_defaults(cfg, speed); } static void enable_logical_chan0(FSP_M_CONFIG *cfg, |