diff --git a/payloads/external/Makefile.mk b/payloads/external/Makefile.mk
index b7d3516bfe..c0882c426d 100644
--- a/payloads/external/Makefile.mk
+++ b/payloads/external/Makefile.mk
@@ -196,7 +196,6 @@ $(obj)/UEFIPAYLOAD.fd: $(DOTCONFIG)
 		CONFIG_EDK2_GOP_FILE=$(CONFIG_EDK2_GOP_FILE) \
 		CONFIG_INTEL_GMA_VBT_FILE=$(CONFIG_INTEL_GMA_VBT_FILE) \
 		CONFIG_EDK2_DISABLE_TPM=$(CONFIG_EDK2_DISABLE_TPM) \
-		CONFIG_EDK2_PCO_MMIO_EMMC=$(CONFIG_EDK2_PCO_MMIO_EMMC) \
 		CONFIG_EDK2_USE_LAPIC_TIMER=$(CONFIG_EDK2_USE_LAPIC_TIMER) \
 		CONFIG_SOC_AMD_COMMON_BLOCK_PSP_GEN2=$(CONFIG_SOC_AMD_COMMON_BLOCK_PSP_GEN2) \
 		CONFIG_DRIVERS_EFI_UPDATE_CAPSULES=$(CONFIG_DRIVERS_EFI_UPDATE_CAPSULES) \
diff --git a/payloads/external/edk2/Kconfig b/payloads/external/edk2/Kconfig
index f731bb1eda..583de2dc1d 100644
--- a/payloads/external/edk2/Kconfig
+++ b/payloads/external/edk2/Kconfig
@@ -298,15 +298,6 @@ config EDK2_DISABLE_TPM
 	  Select this option to disable TPM support in edk2. This is necessary to avoid boot
 	  hangs on some boards with a CR50 TPM, particularly those with an AMD Zen SoC.
 
-config EDK2_PCO_MMIO_EMMC
-	bool "Enable MMIO eMMC driver for AMD Picasso boards in edk2"
-	depends on EDK2_REPO_MRCHROMEBOX
-	default n
-	help
-	  Select this option to enable the MMIO eMMC DXE driver in MrChromebox's fork of edk2.
-	  It is needed for AMD Picasso boards with eMMC storage, but will conflict with the
-	  PCI-based eMMC driver, so should only be enabled for AMD Picasso boards.
-
 config EDK2_USE_LAPIC_TIMER
 	bool "Use LAPIC timer instead of HPET"
 	default n
diff --git a/payloads/external/edk2/Makefile b/payloads/external/edk2/Makefile
index e55b6b5354..1b8ca2e67b 100644
--- a/payloads/external/edk2/Makefile
+++ b/payloads/external/edk2/Makefile
@@ -150,10 +150,6 @@ endif
 ifeq ($(CONFIG_EDK2_DISABLE_TPM),y)
 BUILD_STR += -D TPM_ENABLE=FALSE
 endif
-# USE_PCO_MMIO_EMMC		= FALSE
-ifeq ($(CONFIG_EDK2_PCO_MMIO_EMMC),y)
-BUILD_STR += -D USE_PCO_MMIO_EMMC=TRUE
-endif
 # TIMER_SUPPORT			= HPET
 ifeq ($(CONFIG_EDK2_USE_LAPIC_TIMER),y)
 BUILD_STR += -D TIMER_SUPPORT=LAPIC
diff --git a/src/mainboard/google/zork/Kconfig b/src/mainboard/google/zork/Kconfig
index 2cb296408c..b998de0f1c 100644
--- a/src/mainboard/google/zork/Kconfig
+++ b/src/mainboard/google/zork/Kconfig
@@ -63,7 +63,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select EC_GOOGLE_CHROMEEC_INCLUDE_SSFC_IN_FW_CONFIG
 	select EC_GOOGLE_CHROMEEC_SKUID
 	select EC_GOOGLE_CHROMEEC_SMBIOS
-	select EDK2_PCO_MMIO_EMMC if EDK2_REPO_MRCHROMEBOX
 	select ELOG
 	select ELOG_BOOT_COUNT
 	select ELOG_GSMI