diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/nehalem/gma.c | 5 | ||||
| -rw-r--r-- | src/northbridge/intel/sandybridge/gma.c | 5 |
2 files changed, 6 insertions, 4 deletions
diff --git a/src/northbridge/intel/nehalem/gma.c b/src/northbridge/intel/nehalem/gma.c index 0c681ccc83..4dcbfb30ee 100644 --- a/src/northbridge/intel/nehalem/gma.c +++ b/src/northbridge/intel/nehalem/gma.c @@ -488,10 +488,11 @@ static void gma_pm_init_pre_vbios(struct device *dev) } /* 12: Normal Frequency Request */ - /* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 (8 bits!? use 7) */ + /* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 */ + /* only the lower 7 bits are used and shifted left by 25 */ reg32 = MCHBAR32(0x5998); reg32 >>= 16; - reg32 &= 0xef; + reg32 &= 0x7f; reg32 <<= 25; gtt_write(0xa008, reg32); diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c index 61b9008467..74aabf9e66 100644 --- a/src/northbridge/intel/sandybridge/gma.c +++ b/src/northbridge/intel/sandybridge/gma.c @@ -498,10 +498,11 @@ static void gma_pm_init_pre_vbios(struct device *dev) } /* 12: Normal Frequency Request */ - /* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 (8 bits!? use 7) */ + /* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 */ + /* only the lower 7 bits are used and shifted left by 25 */ reg32 = MCHBAR32(0x5998); reg32 >>= 16; - reg32 &= 0xef; + reg32 &= 0x7f; reg32 <<= 25; gtt_write(0xa008, reg32); |