diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/tigerlake/chip.h | 24 | ||||
| -rw-r--r-- | src/soc/intel/tigerlake/fsp_params.c | 54 |
2 files changed, 77 insertions, 1 deletions
diff --git a/src/soc/intel/tigerlake/chip.h b/src/soc/intel/tigerlake/chip.h index edc716064f..cccf80476e 100644 --- a/src/soc/intel/tigerlake/chip.h +++ b/src/soc/intel/tigerlake/chip.h @@ -499,6 +499,30 @@ struct soc_intel_tigerlake_config { * - PM_CFG.SLP_LAN_MIN_ASST_WDTH */ uint8_t PchPmPwrCycDur; + + /* + * External Clock Gate + * true = Mainboard design uses external clock gating + * false = Mainboard design does not use external clock gating + * + */ + bool external_clk_gated; + + /* + * External PHY Gate + * true = Mainboard design uses external phy gating + * false = Mainboard design does not use external phy gating + * + */ + bool external_phy_gated; + + /* + * External Bypass Enable + * true = Mainboard design uses external bypass rail + * false = Mainboard design does not use external bypass rail + * + */ + bool external_bypass; }; typedef struct soc_intel_tigerlake_config config_t; diff --git a/src/soc/intel/tigerlake/fsp_params.c b/src/soc/intel/tigerlake/fsp_params.c index c0d712ca35..90d6805a76 100644 --- a/src/soc/intel/tigerlake/fsp_params.c +++ b/src/soc/intel/tigerlake/fsp_params.c @@ -3,7 +3,10 @@ #include <assert.h> #include <console/console.h> #include <device/device.h> +#include <arch/pci_io_cfg.h> +#include <device/pci_ops.h> #include <device/pci.h> +#include <device/pci_ids.h> #include <fsp/api.h> #include <fsp/ppi/mp_service_ppi.h> #include <fsp/util.h> @@ -50,6 +53,55 @@ static int get_l1_substate_control(enum L1_substates_control ctl) return ctl - 1; } +/* Function returns true if the platform is TGL-UP3 */ +static bool platform_is_up3(void) +{ + const struct device *dev = pcidev_path_on_root(SA_DEVFN_ROOT); + u32 cpu_id = cpu_get_cpuid(); + uint16_t mchid = pci_read_config16(dev, PCI_DEVICE_ID); + + if ((cpu_id != CPUID_TIGERLAKE_A0) && (cpu_id != CPUID_TIGERLAKE_B0)) + return false; + + return ((mchid == PCI_DEVICE_ID_INTEL_TGL_ID_U_2_2) || + (mchid == PCI_DEVICE_ID_INTEL_TGL_ID_U_4_2)); +} + +static int get_disable_mask(struct soc_intel_tigerlake_config *config) +{ + int disable_mask; + + /* Disable any sub-states requested by mainboard */ + disable_mask = config->LpmStateDisableMask; + + /* UP3 does not support S0i2.2/S0i3.3/S0i3.4 */ + if (platform_is_up3()) + disable_mask |= LPM_S0i3_3 | LPM_S0i3_4 | LPM_S0i2_2; + + /* If external bypass is not used, S0i3 isn't recommended. */ + if (config->external_bypass == false) + disable_mask |= LPM_S0i3_0 | LPM_S0i3_1 | LPM_S0i3_2 | LPM_S0i3_3 | LPM_S0i3_4; + + /* If external clock gating is not implemented, S0i3.4 isn't recommended. */ + if (config->external_clk_gated == false) + disable_mask |= LPM_S0i3_4; + + /* + * If external phy gating is not implemented, + * S0i3.3/S0i3.4/S0i2.2 are not recommended. + */ + if (config->external_phy_gated == false) + disable_mask |= LPM_S0i3_3 | LPM_S0i3_4 | LPM_S0i2_2; + + /* If CNVi or ISH is used, S0i3.2/S0i3.3/S0i3.4 cannot be achieved. */ + if (is_dev_enabled(pcidev_path_on_root(PCH_DEVFN_CNVI_BT)) || + is_dev_enabled(pcidev_path_on_root(PCH_DEVFN_CNVI_WIFI)) || + is_dev_enabled(pcidev_path_on_root(PCH_DEVFN_ISH))) + disable_mask |= LPM_S0i3_2 | LPM_S0i3_3 | LPM_S0i3_4; + + return disable_mask; +} + static void parse_devicetree(FSP_S_CONFIG *params) { const struct soc_intel_tigerlake_config *config; @@ -234,7 +286,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd) * LPM0-s0i2.0, LPM1-s0i2.1, LPM2-s0i2.2, LPM3-s0i3.0, * LPM4-s0i3.1, LPM5-s0i3.2, LPM6-s0i3.3, LPM7-s0i3.4 */ - params->LpmStateEnableMask = LPM_S0iX_ALL & ~config->LpmStateDisableMask; + params->LpmStateEnableMask = LPM_S0iX_ALL & ~get_disable_mask(config); /* * Power Optimizer for DMI and SATA. |