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authorPatrick Rudolph <siro@das-labor.org>2016-06-11 18:39:35 +0200
committerMartin Roth <martinroth@google.com>2016-06-20 21:44:15 +0200
commit7bddd30e948e6c3856336e77221fdbe5ba749453 (patch)
tree612c242d2a1dc475000ab4a2e5ebfcf823d500d9 /src/northbridge/intel
parent4089a17cb925a0e9f305e29d4d6b38a2b24d8f56 (diff)
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/intel')
-rw-r--r--src/northbridge/intel/sandybridge/raminit.c6
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;