IB/qib: Add missing serdes init sequence
commit2f75e12c44
upstream. Research has shown that commita77fcf8950
("IB/qib: Use a single txselect module parameter for serdes tuning") missed a key serdes init sequence. This patch add that sequence. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2279,6 +2279,11 @@ static int qib_7322_bringup_serdes(struct qib_pportdata *ppd)
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qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a);
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qib_write_kreg(dd, kr_scratch, 0ULL);
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/* ensure previous Tx parameters are not still forced */
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qib_write_kreg_port(ppd, krp_tx_deemph_override,
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SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
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reset_tx_deemphasis_override));
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if (qib_compat_ddr_negotiate) {
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ppd->cpspec->ibdeltainprog = 1;
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ppd->cpspec->ibsymsnap = read_7322_creg32_port(ppd,
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