Attention is currently required from: Tarun Tuli, Kapil Porwal.
Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/69999 )
Change subject: soc/intel/meteorlake: Allow sending late EOP cmd to CSE ......................................................................
soc/intel/meteorlake: Allow sending late EOP cmd to CSE
This patch selects SOC_INTEL_CSE_SEND_EOP_LATE config to let IA common code to skip sending CSE EOP cmd during finalize operation rather uses boot state machine (either payload load or payload boot) to delay in sending EOP cmd to CSE.
BUG=none TEST=Able to boot to Google/Rex with this patch and observed ~150ms savings in boot time
Without this patch:
942:before sending EOP to ME 1,795,702 (354) 943:after sending EOP to ME 1,950,526 (154,824)
With this patch:
942:before sending EOP to ME 2,051,406 (35,484) 943:after sending EOP to ME 2,057,583 (6,177)
Signed-off-by: Subrata Banik subratabanik@google.com Change-Id: I7d44d5eff890ac78e3075d49cc249f740686dd0d --- M src/soc/intel/meteorlake/Kconfig 1 file changed, 30 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/99/69999/1
diff --git a/src/soc/intel/meteorlake/Kconfig b/src/soc/intel/meteorlake/Kconfig index c3efd3e..fb99d30 100644 --- a/src/soc/intel/meteorlake/Kconfig +++ b/src/soc/intel/meteorlake/Kconfig @@ -82,6 +82,7 @@ select SOC_INTEL_COMMON_PCH_CLIENT select SOC_INTEL_COMMON_RESET select SOC_INTEL_COMMON_BLOCK_IOC + select SOC_INTEL_CSE_SEND_EOP_LATE select SOC_INTEL_CSE_SET_EOP select SOC_INTEL_GFX_NON_PREFETCHABLE_MMIO select SOC_INTEL_MEM_MAPPED_PM_CONFIGURATION