[S] Change in coreboot[master]: mb/google/brya/var/taeko: Disable C1E for RPL CPU

[Joey Peng (Code Review)]

Joey Peng has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74786 )

Change subject: mb/google/brya/var/taeko: Disable C1E for RPL CPU
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mb/google/brya/var/taeko: Disable C1E for RPL CPU

Disable C1E on RPL CPU for improving acoustic noise tests

BUG=b:278654939
TEST:emerge-brya coreboot and check that C1E can be disabled on RPL CPU

Signed-off-by: Joey Peng 
Change-Id: I5e4c74aa288f1c824c5e7ce83090cf61d7653183
---
M src/mainboard/google/brya/variants/taeko/variant.c
1 file changed, 34 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/86/74786/1

diff --git a/src/mainboard/google/brya/variants/taeko/variant.c b/src/mainboard/google/brya/variants/taeko/variant.c
index b44e9e3..4defc98 100644
--- a/src/mainboard/google/brya/variants/taeko/variant.c
+++ b/src/mainboard/google/brya/variants/taeko/variant.c
@@ -1,9 +1,28 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

#include <fw_config.h>
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <cpu/cpu.h>
+#include <cpu/intel/cpu_ids.h>
 #include <sar.h>

const char *get_wifi_sar_cbfs_filename(void)
 {
    return get_wifi_sar_fw_config_filename(FW_CONFIG_FIELD(WIFI_SAR_ID));
 }
+
+void variant_update_soc_chip_config(struct soc_intel_alderlake_config *config)
+{
+	//Disable C1E for RPL CPU
+
+	uint32_t cpu_id = cpu_get_cpuid();
+	if (cpu_id == CPUID_RAPTORLAKE_P_J0 || cpu_id == CPUID_RAPTORLAKE_P_Q0) {
+		config->c1e = 0;
+		printk(BIOS_INFO, "Disable C1E for RPL CPU\n");
+	}
+	else if (cpu_id == CPUID_ALDERLAKE_R0) {
+		config->c1e = 1;
+		printk(BIOS_INFO, "Keep C1E enabled for ADL CPU\n");
+	}
+}