soc/intel/elkhartlake: Make PCIe root port max payload size configurable

The data payload size of PCIe root ports can be set to either 128
(default) or 256 bytes. A bigger payload size can improve PCIe data
throughput on the given port. FSP-S provides a parameter to configure
this value.

This patch provides a chip config so that this FSP parameter can be set
as needed in the devicetree on mainboard level.

Change-Id: I5798a72adaa8089dda0b4bc12266b5a235ed4aa3
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75126
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Reviewed-by: Sridhar Siricilla <sridhar.siricilla@intel.com>

0 files changed, 0 insertions, 0 deletions