From dcf045918b8584d23e487f70959ebbb2ef4492b6 Mon Sep 17 00:00:00 2001
From: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Date: Fri, 3 Dec 2021 19:07:04 +0530
Subject: [PATCH] drivers/intel/mipi_camera: Add ACPI entry to provide silicon
 type info

Add entry in ACPI table under IPU device to provide silicon type
information to IPU driver. IPU kernel driver can decide the type of
firmware to load based on this information.

BUG=b:207721978
BRANCH=none
TEST=Check for the ACPI entry in the SSDT after booting to kernel

Change-Id: I4e0af1dd50b9c014cae5454fcd4f9f76d0e0a85f
Cq-Depend: chromium:3319905
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59869
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
---
 src/drivers/intel/mipi_camera/camera.c | 10 ++++++++++
 src/soc/intel/alderlake/Kconfig        |  6 ++++++
 2 files changed, 16 insertions(+)

diff --git a/src/drivers/intel/mipi_camera/camera.c b/src/drivers/intel/mipi_camera/camera.c
index a9af25cf12..ec7f20bf8d 100644
--- a/src/drivers/intel/mipi_camera/camera.c
+++ b/src/drivers/intel/mipi_camera/camera.c
@@ -5,7 +5,9 @@
 #include <acpi/acpi_device.h>
 #include <acpi/acpigen.h>
 #include <acpi/acpigen_pci.h>
+#include <arch/cpu.h>
 #include <console/console.h>
+#include <cpu/intel/cpu_ids.h>
 #include <device/i2c_simple.h>
 #include <device/device.h>
 #include <device/path.h>
@@ -134,6 +136,14 @@ static void camera_fill_cio2(const struct device *dev)
 
 		snprintf(name, sizeof(name), "port%u", i);
 		port_name[i] = strdup(name);
+		if (CONFIG(ACPI_ADL_IPU_ES_SUPPORT)) {
+			u32 cpu_id = cpu_get_cpuid();
+			if (cpu_id == CPUID_ALDERLAKE_A0 || cpu_id == CPUID_ALDERLAKE_A1)
+				acpi_dp_add_integer(dsd, "is_es", 1);
+			else
+				acpi_dp_add_integer(dsd, "is_es", 0);
+		}
+
 		acpi_dp_add_child(dsd, port_name[i], port_table);
 	}
 
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index 89570b102b..9e69663acd 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -28,6 +28,7 @@ if SOC_INTEL_ALDERLAKE
 config CPU_SPECIFIC_OPTIONS
 	def_bool y
 	select ACPI_INTEL_HARDWARE_SLEEP_VALUES
+	select ACPI_ADL_IPU_ES_SUPPORT
 	select ARCH_X86
 	select BOOT_DEVICE_SUPPORTS_WRITES
 	select CACHE_MRC_SETTINGS
@@ -339,6 +340,11 @@ config SOC_INTEL_CRASHLOG
 	help
 	  Enables CrashLog.
 
+config ACPI_ADL_IPU_ES_SUPPORT
+	def_bool n
+	help
+	  Enables ACPI entry to provide silicon type information to IPU kernel driver.
+
 if STITCH_ME_BIN
 
 config CSE_BPDT_VERSION