net: amd-xgbe: Toggle PLL settings during rate change

Browse source

For each rate change command submission, the FW has to do a phy
power off sequence internally. For this to happen correctly, the
PLL re-initialization control setting has to be turned off before
sending mailbox commands and re-enabled once the command submission
is complete.

Without the PLL control setting, the link up takes longer time in a
fixed phy configuration.

Fixes: 47f164deab ("amd-xgbe: Add PCI device support")
Co-developed-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Shyam Sundar S K 2021-10-27 15:27:27 +05:30 • committed by David S. Miller

parent cec6880d9b

commit daf182d360

2 changed files with 27 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

drivers/net/ethernet/amd/xgbe/xgbe-common.h

View file

20

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

View file