soc/intel/alderlake: Switch to runtime generation of Intel Power Engine

The pep.asl file is being obsoleted by runtime generation, therefore
switch alderlake boards to this method.

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I617bc3d1c3cf4ac6b6cbbd790dcf62e731024834
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56006
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/alderlake/Kconfig

@@ -48,6 +48,8 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_ACPI
 	select SOC_INTEL_COMMON_BLOCK_ACPI_CPPC
 	select SOC_INTEL_COMMON_BLOCK_ACPI_GPIO
+	select SOC_INTEL_COMMON_BLOCK_ACPI_PEP
+	select SOC_INTEL_COMMON_BLOCK_ACPI_PEP_LPM_REQ
 	select SOC_INTEL_COMMON_BLOCK_CAR
 	select SOC_INTEL_COMMON_BLOCK_CHIP_CONFIG
 	select SOC_INTEL_COMMON_BLOCK_CPU

src/soc/intel/alderlake/acpi/southbridge.asl

@@ -38,8 +38,5 @@
 /* PCI _OSC */
 #include <soc/intel/common/acpi/pci_osc.asl>
 
-/* Intel Power Engine Plug-in */
-#include <soc/intel/common/block/acpi/acpi/pep.asl>
-
 /* GbE 0:1f.6 */
 #include <soc/intel/common/block/acpi/acpi/pch_glan.asl>

src/soc/intel/alderlake/pmc.c

@@ -11,10 +11,12 @@
 #include <device/mmio.h>
 #include <device/device.h>
 #include <drivers/intel/pmc_mux/chip.h>
+#include <intelblocks/acpi.h>
 #include <intelblocks/pmc.h>
 #include <intelblocks/pmc_ipc.h>
 #include <intelblocks/pmclib.h>
 #include <intelblocks/rtc.h>
+#include <soc/cpu.h>
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
 #include <soc/soc_chip.h>
@@ -122,6 +124,18 @@ static void soc_pmc_fill_ssdt(const struct device *dev)
 	acpigen_pop_len(); /* PMC Device */
 	acpigen_pop_len(); /* Scope */
 
+	if (CONFIG(SOC_INTEL_COMMON_BLOCK_ACPI_PEP)) {
+		const struct soc_pmc_lpm adl_pmc_lpm = {
+			.num_substates = 8,
+			.num_req_regs = 6,
+			.lpm_ipc_offset = 0x1000,
+			.req_reg_stride = 0x30,
+			.lpm_enable_mask = get_supported_lpm_mask(),
+		};
+
+		generate_acpi_power_engine_with_lpm(&adl_pmc_lpm);
+	}
+
 	printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), dev->chip_ops->name,
 	       dev_path(dev));
 }