soc/intel/jasperlake: Add per-SKU power limits

Add JSL SKUs ID and add PLx from JSL PDG in project devicetree.

BUG=b:281479111
TEST=emerge-dedede coreboot and read correct value on dibbi

Signed-off-by: Chia-Ling Hou <chia-ling.hou@intel.com>
Change-Id: Ic086e32a2692f4f5f9b661585b216fa207fc56fd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75679
Reviewed-by: Super Ni <super.ni@intel.corp-partner.google.com>
Reviewed-by: Super Ni <super.ni@intel.com>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>

2 files changed, 63 insertions, 3 deletions

diff --git a/src/soc/intel/jasperlake/chip.h b/src/soc/intel/jasperlake/chip.h
index e6b8f6805e..b986f18c3a 100644
--- a/src/soc/intel/jasperlake/chip.h
+++ b/src/soc/intel/jasperlake/chip.h
@@ -3,6 +3,7 @@
 #ifndef _SOC_CHIP_H_
 #define _SOC_CHIP_H_
 
+#include <device/pci_ids.h>
 #include <drivers/i2c/designware/dw_i2c.h>
 #include <gpio.h>
 #include <drivers/intel/gma/gma.h>
@@ -23,13 +24,44 @@
 #define MAX_HD_AUDIO_SNDW_LINKS 4
 #define MAX_HD_AUDIO_SSP_LINKS  6
 
+/* Types of different SKUs */
+enum soc_intel_jasperlake_power_limits {
+	JSL_N4500_6W_CORE,
+	JSL_N6000_6W_CORE,
+	JSL_N5100_6W_CORE,
+	JSL_N4505_10W_CORE,
+	JSL_N5105_10W_CORE,
+	JSL_N6005_10W_CORE,
+	JSL_POWER_LIMITS_COUNT
+};
+
+/* TDP values for different SKUs */
+enum soc_intel_jasperlake_cpu_tdps {
+	TDP_6W  = 6,
+	TDP_10W = 10
+};
+
+/* Mapping of different SKUs based on CPU ID and TDP values */
+static const struct {
+	unsigned int pci_did;
+	enum soc_intel_jasperlake_power_limits limits;
+	enum soc_intel_jasperlake_cpu_tdps cpu_tdp;
+} cpuid_to_jsl[] = {
+	{ PCI_DID_INTEL_JSL_ID_1, JSL_N4500_6W_CORE, TDP_6W },
+	{ PCI_DID_INTEL_JSL_ID_2, JSL_N6000_6W_CORE, TDP_6W },
+	{ PCI_DID_INTEL_JSL_ID_3, JSL_N5100_6W_CORE, TDP_6W },
+	{ PCI_DID_INTEL_JSL_ID_4, JSL_N4505_10W_CORE, TDP_10W },
+	{ PCI_DID_INTEL_JSL_ID_5, JSL_N5105_10W_CORE, TDP_10W },
+	{ PCI_DID_INTEL_JSL_ID_6, JSL_N6005_10W_CORE, TDP_10W },
+};
+
 struct soc_intel_jasperlake_config {
 
 	/* Common struct containing soc config data required by common code */
 	struct soc_intel_common_config common_soc_config;
 
 	/* Common struct containing power limits configuration information */
-	struct soc_power_limits_config power_limits_config;
+	struct soc_power_limits_config power_limits_config[JSL_POWER_LIMITS_COUNT];
 
 	/* Gpio group routed to each dword of the GPE0 block. Values are
 	 * of the form PMC_GPP_[A:U] or GPD. */
diff --git a/src/soc/intel/jasperlake/systemagent.c b/src/soc/intel/jasperlake/systemagent.c
index fd04be589f..f0e9d44bbb 100644
--- a/src/soc/intel/jasperlake/systemagent.c
+++ b/src/soc/intel/jasperlake/systemagent.c
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <chip.h>
+#include <console/console.h>
 #include <device/device.h>
 #include <delay.h>
 #include <device/pci.h>
@@ -48,6 +50,9 @@ void soc_systemagent_init(struct device *dev)
 {
 	struct soc_power_limits_config *soc_config;
 	config_t *config;
+	uint16_t sa_pci_id;
+	uint8_t tdp;
+	size_t i = 0;
 
 	/* Enable Power Aware Interrupt Routing */
 	enable_power_aware_intr();
@@ -57,6 +62,29 @@ void soc_systemagent_init(struct device *dev)
 
 	mdelay(1);
 	config = config_of_soc();
-	soc_config = &config->power_limits_config;
-	set_power_limits(MOBILE_SKU_PL1_TIME_SEC, soc_config);
+
+	/* Get System Agent PCI ID */
+	sa_pci_id = dev ? pci_read_config16(dev, PCI_DEVICE_ID) : 0xFFFF;
+
+	if (sa_pci_id != 0xFFFF) {
+		tdp = get_cpu_tdp();
+
+		/* Choose power limits configuration based on the CPU SA PCI ID and
+		* CPU TDP value. */
+		for (i = 0; i < ARRAY_SIZE(cpuid_to_jsl); i++) {
+			if (sa_pci_id == cpuid_to_jsl[i].pci_did &&
+					tdp == cpuid_to_jsl[i].cpu_tdp) {
+				soc_config = &config->power_limits_config[cpuid_to_jsl[i].limits];
+				set_power_limits(MOBILE_SKU_PL1_TIME_SEC, soc_config);
+				break;
+			}
+		}
+	}
+
+	if (i == ARRAY_SIZE(cpuid_to_jsl) || sa_pci_id == 0xFFFF) {
+		printk(BIOS_ERR, "unknown SA ID: 0x%4x, can't find its TDP."
+			" Skipped power limits configuration.\n",
+			sa_pci_id);
+		return;
+	}
 }