e1000e: change k1 configuration on MTP and later platforms

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[ Upstream commit efaaf344bc ]

Starting from Meteor Lake, the Kumeran interface between the integrated
MAC and the I219 PHY works at a different frequency. This causes sporadic
MDI errors when accessing the PHY, and in rare circumstances could lead
to packet corruption.

To overcome this, introduce minor changes to the Kumeran idle
state (K1) parameters during device initialization. Hardware reset
reverts this configuration, therefore it needs to be applied in a few
places.

Fixes: cc23f4f0b6 ("e1000e: Add support for Meteor Lake")
Signed-off-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Tested-by: Avigail Dahan <avigailx.dahan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Vitaly Lifshits 2025-03-13 16:05:56 +02:00 • committed by Greg Kroah-Hartman

parent 40d187b247

commit d11d0ce887

3 changed files with 82 additions and 5 deletions

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3

drivers/net/ethernet/intel/e1000e/defines.h

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80

drivers/net/ethernet/intel/e1000e/ich8lan.c

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4

drivers/net/ethernet/intel/e1000e/ich8lan.h

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