diff options
| author | Subrata Banik <subrata.banik@intel.com> | 2021-10-26 13:19:20 +0530 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-11-02 08:13:25 +0000 |
| commit | 3306f37fd60ddb19e78816327dc0655dbf39186e (patch) | |
| tree | 3da44350f39f599217c0d9276824a666f0df39d0 /src/lib | |
| parent | 35bcf5071ccf3c4a56445b172b64d2ce515a39e9 (diff) | |
lib: Add new argument as `ddr_type` to smbios_bus_width_to_spd_width()
Add DDR5 and LPDDR5 memory type checks while calculating bus width
extension (in bits).
Additionally, update all caller functions of
smbios_bus_width_to_spd_width() to pass `MemoryType` as argument.
Update `test_smbios_bus_width_to_spd_width()` to accommodate
different memory types.
Create new macro to fix incorrect bus width reporting
on platform with DDR5 and LPDDR5 memory.
With this code changes, on DDR5 system with 2 Ch per DIMM, 32 bit
primary bus width per Ch showed the Total width as:
Handle 0x000F, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x0009
Error Information Handle: Not Provided
Total Width: 80 bits
Data Width: 64 bits
Size: 16 GB
...
BUG=b:194659789
Tested=On Alder Lake DDR5 RVP, SMBIOS type 17 shows expected `Total Width`.
Change-Id: I79ec64c9d522a34cb44b3f575725571823048380
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58601
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/dimm_info_util.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/lib/dimm_info_util.c b/src/lib/dimm_info_util.c index fb8e06f149..0e7cc12f18 100644 --- a/src/lib/dimm_info_util.c +++ b/src/lib/dimm_info_util.c @@ -5,7 +5,8 @@ #include <spd.h> #include <console/console.h> -uint8_t smbios_bus_width_to_spd_width(uint16_t total_width, uint16_t data_width) +uint8_t smbios_bus_width_to_spd_width(uint8_t ddr_type, uint16_t total_width, + uint16_t data_width) { uint8_t out; @@ -38,7 +39,10 @@ uint8_t smbios_bus_width_to_spd_width(uint16_t total_width, uint16_t data_width) switch (extension_bits) { case 8: - out |= SPD_ECC_8BIT; + if (ddr_type == MEMORY_TYPE_DDR5 || ddr_type == MEMORY_TYPE_LPDDR5) + out |= SPD_ECC_8BIT_LP5_DDR5; + else + out |= SPD_ECC_8BIT; break; case 0: /* No extension bits */ |