diff options
| author | Patrick Rudolph <siro@das-labor.org> | 2016-06-11 18:39:35 +0200 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-06-20 21:44:15 +0200 |
| commit | 7bddd30e948e6c3856336e77221fdbe5ba749453 (patch) | |
| tree | 612c242d2a1dc475000ab4a2e5ebfcf823d500d9 /src/northbridge | |
| parent | 4089a17cb925a0e9f305e29d4d6b38a2b24d8f56 (diff) | |
| download | coreboot-7bddd30e948e6c3856336e77221fdbe5ba749453.tar.xz | |
nb/intel/sandybridge/raminit: Allow 933Mhz on Lenovo devices
Set max_mem_clock_mhz in devicetree to 933Mhz.
Allows to run the memory at up to DDR3-1866.
The same frequency was allowed within the first vendor bios,
but Lenovo than decided to limit it to DDR3-1333.
Tested on Lenovo T520 and DDR3-1600 DIMM (RMT3170eb86e9w16).
The RAM is now running at DDR3-1600 instead of DDR3-1333.
This gives about 4% performance increase in glmark2 using the
Intel GPU.
Change-Id: If15be497402d84a2778f0434b6381a64eda832d6
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/15158
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c index 4563547c79..15590d1da5 100644 --- a/src/northbridge/intel/sandybridge/raminit.c +++ b/src/northbridge/intel/sandybridge/raminit.c @@ -4374,7 +4374,11 @@ static unsigned int get_mem_min_tck(void) } return DEFAULT_TCK; } else { - if (cfg->max_mem_clock_mhz >= 800) + if (cfg->max_mem_clock_mhz >= 1066) + return TCK_1066MHZ; + else if (cfg->max_mem_clock_mhz >= 933) + return TCK_933MHZ; + else if (cfg->max_mem_clock_mhz >= 800) return TCK_800MHZ; else if (cfg->max_mem_clock_mhz >= 666) return TCK_666MHZ; |