diff --git a/src/soc/amd/cezanne/acpi.c b/src/soc/amd/cezanne/acpi.c
index edf20c9b6f..631f388fdf 100644
--- a/src/soc/amd/cezanne/acpi.c
+++ b/src/soc/amd/cezanne/acpi.c
@@ -76,6 +76,8 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 
 	fill_fadt_extended_pm_regs(fadt);
 
+	/* p_lvl2_lat and p_lvl3_lat match what the AGESA code does, but those values are
+	   overridden by the _CST packages in the processor devices. */
 	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
 	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
 	fadt->duty_offset = 0;	/* Not supported */
diff --git a/src/soc/amd/glinda/acpi.c b/src/soc/amd/glinda/acpi.c
index 8d6c008a96..31723b1b4f 100644
--- a/src/soc/amd/glinda/acpi.c
+++ b/src/soc/amd/glinda/acpi.c
@@ -79,6 +79,8 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 
 	fill_fadt_extended_pm_regs(fadt);
 
+	/* p_lvl2_lat and p_lvl3_lat match what the AGESA code does, but those values are
+	   overridden by the _CST packages in the processor devices. */
 	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
 	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
 	fadt->duty_offset = 0;	/* Not supported */
diff --git a/src/soc/amd/mendocino/acpi.c b/src/soc/amd/mendocino/acpi.c
index 6b20b023d5..044b345df1 100644
--- a/src/soc/amd/mendocino/acpi.c
+++ b/src/soc/amd/mendocino/acpi.c
@@ -78,6 +78,8 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 
 	fill_fadt_extended_pm_regs(fadt);
 
+	/* p_lvl2_lat and p_lvl3_lat match what the AGESA code does, but those values are
+	   overridden by the _CST packages in the processor devices. */
 	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
 	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
 	fadt->duty_offset = 0;	/* Not supported */
diff --git a/src/soc/amd/phoenix/acpi.c b/src/soc/amd/phoenix/acpi.c
index 32dde83651..09c4a15401 100644
--- a/src/soc/amd/phoenix/acpi.c
+++ b/src/soc/amd/phoenix/acpi.c
@@ -79,6 +79,8 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 
 	fill_fadt_extended_pm_regs(fadt);
 
+	/* p_lvl2_lat and p_lvl3_lat match what the AGESA code does, but those values are
+	   overridden by the _CST packages in the processor devices. */
 	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
 	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
 	fadt->duty_offset = 0;	/* Not supported */
diff --git a/src/soc/amd/picasso/acpi.c b/src/soc/amd/picasso/acpi.c
index 1d5a275d42..f6fb9f259d 100644
--- a/src/soc/amd/picasso/acpi.c
+++ b/src/soc/amd/picasso/acpi.c
@@ -82,6 +82,8 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 
 	fill_fadt_extended_pm_regs(fadt);
 
+	/* p_lvl2_lat and p_lvl3_lat match what the AGESA code does, but those values are
+	   overridden by the _CST packages in the processor devices. */
 	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
 	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
 	fadt->duty_offset = 1;	/* CLK_VAL bits 3:1 */
diff --git a/src/soc/amd/stoneyridge/acpi.c b/src/soc/amd/stoneyridge/acpi.c
index e2fb2e344f..3b45a5ff99 100644
--- a/src/soc/amd/stoneyridge/acpi.c
+++ b/src/soc/amd/stoneyridge/acpi.c
@@ -74,6 +74,8 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 
 	fill_fadt_extended_pm_regs(fadt);
 
+	/* p_lvl2_lat and p_lvl3_lat match what the AGESA code does, but those values are
+	   overridden by the _CST packages in the PSTATE SSDT. */
 	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
 	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
 	fadt->duty_offset = 1;	/* CLK_VAL bits 3:1 */