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authorTimothy Pearson <tpearson@raptorengineeringinc.com>2015-08-27 15:10:19 -0500
committerMartin Roth <martinroth@google.com>2015-11-30 05:19:19 +0100
commit01b9f8e4c221b3ae8167579ab81bb6c829fb8070 (patch)
tree767392be1d291058f56193b850f7303349047ffe /src/cpu/amd
parent323c7db20441e5ee2ffc2c76c283e131ef9897cb (diff)
nb/amd/mct_ddr3: Use antiphase to better center DQS window
The BKDG recommends the use of an antiphase window detection algorithm to ensure that the DQS data eye is properly centered. TEST: Booted both with DIMMs known to move the data eye into the prior clock phase and DIMMs known to keep the data eye in the current clock phase. Change-Id: I1d85fddd45197ca82dcaa46fe863e64589712d1f Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> Reviewed-on: https://review.coreboot.org/12059 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com> Reviewed-by: Martin Roth <martinroth@google.com>
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