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authorPatrick Rudolph <patrick.rudolph@9elements.com>2019-08-14 12:10:48 +0200
committerPhilipp Deppenwiese <zaolin.daisuki@gmail.com>2019-08-20 11:14:47 +0000
commit9a016236d4d67e0c95245d0e67ab85ba2a242359 (patch)
treeed2ae6f20522e9f6676d246ba41e542838c42ac3 /src/soc/intel/skylake
parent69e826dab2e6d268031e8c76b4a8011f97a05bbd (diff)
downloadcoreboot-9a016236d4d67e0c95245d0e67ab85ba2a242359.tar.xz
soc/intel/skylake/vr_config: Add loadline defaults
In addition to zero IccMax specified by mainboard with socketed CPU, allow a zero LoadLine default. The SoC code will fill in the default AC/DC LoadLine values are per datasheets: * "7th Generation Intel® Processor Families for H Platforms, Vol 1" Document Number: 335190-003 * "7th Generation Intel® Processor Families for S Platforms and Intel ®Core™ X-Series Processor Family, Vol 1" Document Number: 335195-003 The AC/DC LoadLine is CPU and board specific. TODO: Find out how to get the LoadLine from vendor firmware and find out how to map those to different CPU LoadLines. Change-Id: I849845ced094697e8700470b4af95ad0afb98e3e Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34938 Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com> Reviewed-by: Maxim Polyakov <max.senia.poliak@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/skylake')
-rw-r--r--src/soc/intel/skylake/include/soc/vr_config.h1
-rw-r--r--src/soc/intel/skylake/vr_config.c85
2 files changed, 84 insertions, 2 deletions
diff --git a/src/soc/intel/skylake/include/soc/vr_config.h b/src/soc/intel/skylake/include/soc/vr_config.h
index 465e248700..aebbbdff4a 100644
--- a/src/soc/intel/skylake/include/soc/vr_config.h
+++ b/src/soc/intel/skylake/include/soc/vr_config.h
@@ -68,6 +68,7 @@ struct vr_config {
};
#define VR_CFG_AMP(i) ((i) * 4)
+#define VR_CFG_MOHMS(i) (uint16_t)((i) * 100)
#if CONFIG(PLATFORM_USES_FSP1_1)
/* VrConfig Settings for 5 domains
diff --git a/src/soc/intel/skylake/vr_config.c b/src/soc/intel/skylake/vr_config.c
index 33ce54ada5..089dd5d572 100644
--- a/src/soc/intel/skylake/vr_config.c
+++ b/src/soc/intel/skylake/vr_config.c
@@ -220,6 +220,81 @@ static uint16_t get_sku_icc_max(int domain)
return 0;
}
+#if CONFIG(PLATFORM_USES_FSP2_0)
+static uint16_t get_sku_ac_dc_loadline(const int domain)
+{
+ static uint16_t mch_id = 0, igd_id = 0;
+ if (!mch_id) {
+ struct device *dev = pcidev_path_on_root(SA_DEVFN_ROOT);
+ mch_id = pci_read_config16(dev, PCI_DEVICE_ID);
+ }
+ if (!igd_id) {
+ struct device *dev = pcidev_path_on_root(SA_DEVFN_IGD);
+ if (dev)
+ igd_id = pci_read_config16(dev, PCI_DEVICE_ID);
+ else
+ igd_id = 0xffff;
+ }
+
+ switch (mch_id) {
+ case PCI_DEVICE_ID_INTEL_KBL_ID_S: /* fallthrough */
+ case PCI_DEVICE_ID_INTEL_KBL_ID_DT: /* fallthrough */
+ case PCI_DEVICE_ID_INTEL_KBL_ID_DT_2: {
+ static const uint16_t loadline[NUM_VR_DOMAINS] = {
+ VR_CFG_MOHMS(0), /* Not specified */
+ VR_CFG_MOHMS(2.1),
+ VR_CFG_MOHMS(3.1),
+ VR_CFG_MOHMS(3.1),
+ };
+
+ return loadline[domain];
+ }
+ case PCI_DEVICE_ID_INTEL_KBL_ID_H: {
+ static const uint16_t loadline[NUM_VR_DOMAINS] = {
+ VR_CFG_MOHMS(10),
+ VR_CFG_MOHMS(1.8),
+ VR_CFG_MOHMS(2.65),
+ VR_CFG_MOHMS(2.65),
+ };
+
+ return loadline[domain];
+ }
+ case PCI_DEVICE_ID_INTEL_KBL_ID_Y: {
+ uint16_t loadline[NUM_VR_DOMAINS] = {
+ VR_CFG_MOHMS(18),
+ VR_CFG_MOHMS(5.9),
+ VR_CFG_MOHMS(5.7),
+ VR_CFG_MOHMS(5.7),
+ };
+
+ if (igd_id == PCI_DEVICE_ID_INTEL_AML_GT2_ULX)
+ loadline[VR_IA_CORE] = VR_CFG_MOHMS(4);
+
+ return loadline[domain];
+ }
+ case PCI_DEVICE_ID_INTEL_KBL_U_R: /* fallthrough */
+ case PCI_DEVICE_ID_INTEL_KBL_ID_U: {
+ uint16_t loadline[NUM_VR_DOMAINS] = {
+ VR_CFG_MOHMS(10.3),
+ VR_CFG_MOHMS(2.4),
+ VR_CFG_MOHMS(3.1),
+ VR_CFG_MOHMS(3.1),
+ };
+
+ if (igd_id == PCI_DEVICE_ID_INTEL_SPT_LP_U_PREMIUM_HDCP22) {
+ loadline[VR_GT_UNSLICED] = VR_CFG_MOHMS(6);
+ loadline[VR_GT_SLICED] = VR_CFG_MOHMS(6);
+ }
+
+ return loadline[domain];
+ }
+ default:
+ printk(BIOS_ERR, "ERROR: Unknown MCH in VR-config\n");
+ }
+ return 0;
+}
+#endif
+
void fill_vr_domain_config(void *params,
int domain, const struct vr_config *chip_cfg)
{
@@ -251,7 +326,13 @@ void fill_vr_domain_config(void *params,
vr_params->VrVoltageLimit[domain] = cfg->voltage_limit;
#if CONFIG(PLATFORM_USES_FSP2_0)
- vr_params->AcLoadline[domain] = cfg->ac_loadline;
- vr_params->DcLoadline[domain] = cfg->dc_loadline;
+ if (cfg->ac_loadline)
+ vr_params->AcLoadline[domain] = cfg->ac_loadline;
+ else
+ vr_params->AcLoadline[domain] = get_sku_ac_dc_loadline(domain);
+ if (cfg->dc_loadline)
+ vr_params->DcLoadline[domain] = cfg->dc_loadline;
+ else
+ vr_params->DcLoadline[domain] = get_sku_ac_dc_loadline(domain);
#endif
}