Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13150
-gerrit
commit 0a8d15aa1b73960849139eb3e48e38023cd741de Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Tue Nov 24 14:11:53 2015 -0600
nb/amdmct/mct_ddr3: Enable mainboard voltage set
The existing code used an incorrect macro name to check for mainboard DRAM voltage set support, and as a result no voltages were actually set. Furthermore, the existing code did not contain a centralized voltage assumption for boards that did not have a DIMM voltage set implementation.
Use the correct macro name to test for boards with voltage set implementation, and provide a basic fallback to 1.5V operation for boards without a voltage set implementation.
Change-Id: I638c65fe013a8e600694d8cbedf6a10b33b0ef95 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/northbridge/amd/amdmct/mct_ddr3/mct_d.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c index 9724008..e1c0d4f 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c @@ -254,6 +254,10 @@ static uint8_t dct_ddr_voltage_index(struct DCTStatStruc *pDCTstat, uint8_t dct) uint8_t dimm; uint8_t ddr_voltage_index = 0;
+ /* If no DIMMs are present on this DCT, report 1.5V operation and skip checking the hardware */ + if (pDCTstat->DIMMValidDCT[dct] == 0) + return 0x1; + /* Find current DDR supply voltage for this DCT */ for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) { if (pDCTstat->DIMMValidDCT[dct] & (1 << dimm)) @@ -2409,6 +2413,7 @@ static void mctAutoInitMCT_D(struct MCTStatStruc *pMCTstat, */ u8 Node, NodesWmem; u32 node_sys_base; + uint8_t dimm; uint8_t nvram; uint8_t enable_cc6; uint8_t allow_config_restore; @@ -2498,10 +2503,25 @@ restartinit: nvram = 0; set_option("allow_spd_nvram_cache_restore", &nvram);
-#if IS_ENABLED(DIMM_VOLTAGE_SET_SUPPORT) +#if IS_ENABLED(CONFIG_DIMM_VOLTAGE_SET_SUPPORT) printk(BIOS_DEBUG, "%s: DIMMSetVoltage\n", __func__); DIMMSetVoltages(pMCTstat, pDCTstatA); /* Set the DIMM voltages (mainboard specific) */ #endif + if (!IS_ENABLED(CONFIG_DIMM_VOLTAGE_SET_SUPPORT)) { + /* Assume 1.5V operation */ + for (Node = 0; Node < MAX_NODES_SUPPORTED; Node++) { + struct DCTStatStruc *pDCTstat; + pDCTstat = pDCTstatA + Node; + + if (!pDCTstat->NodePresent) + continue; + + for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) { + if (pDCTstat->DIMMValid & (1 << dimm)) + pDCTstat->DimmConfiguredVoltage[dimm] = 0x1; + } + } + }
/* If DIMM configuration has not changed since last boot restore training values */ allow_config_restore = 1;