amd-xgbe: enable PLL_CTL for fixed PHY modes only

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PLL control setting(RRC) is needed only in fixed PHY configuration to
fix the peer-peer issues. Without the PLL control setting, the link up
takes longer time in a fixed phy configuration.

Driver implements SW RRC for Autoneg On configuration, hence PLL control
setting (RRC) is not needed for AN On configuration, and can be skipped.

Also, PLL re-initialization is not needed for PHY Power Off and RRC
commands. Otherwise, they lead to mailbox errors. Added the changes
accordingly.

Fixes: daf182d360 ("net: amd-xgbe: Toggle PLL settings during rate change")
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Raju Rangoju 2022-10-20 12:12:13 +05:30 • committed by Jakub Kicinski

parent 1246d08623

commit fc75c032ae

1 changed files with 8 additions and 2 deletions

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drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c

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