diff options
| author | Wisley Chen <wisley.chen@quanta.corp-partner.google.com> | 2021-11-01 16:13:55 +0600 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-11-09 20:21:39 +0000 |
| commit | d0cef2ac6b0da7e7415bfeb154f0b6e2cfef51a0 (patch) | |
| tree | f0ef871d276c1d331256772b1aa8a8c7d650496a /src/soc | |
| parent | 6d27905e039fcf8671f6b761665cb35fb148548f (diff) | |
soc/intel/alderlake: Enable Intel FIVR RFI settings
Add RFI UPD settings to mitigate RFI noise issues and exporting
these UPDs to override via board devicetree.
BUG=b:200886627
TEST=build
Change-Id: I37bfef295fcd886d4f01abd40f9467a0791e9e34
Signed-off-by: Wisley Chen <wisley.chen@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58878
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/alderlake/chip.h | 33 | ||||
| -rw-r--r-- | src/soc/intel/alderlake/fsp_params.c | 9 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/chip.h b/src/soc/intel/alderlake/chip.h index 699626b767..d2594420c3 100644 --- a/src/soc/intel/alderlake/chip.h +++ b/src/soc/intel/alderlake/chip.h @@ -135,6 +135,22 @@ enum lpm_state_mask { | LPM_S0i3_0 | LPM_S0i3_1 | LPM_S0i3_2 | LPM_S0i3_3 | LPM_S0i3_4, }; +/* + * FivrSpreadSpectrum: + * Values + * 0 - 0.5%, 3 - 1%, 8 - 1.5%, 18 - 2%, 28 - 3%, 34 - 4%, 39 - 5%, 44 - 6% + */ +enum fivr_spread_spectrum_ratio { + FIVR_SS_0_5 = 0, + FIVR_SS_1 = 3, + FIVR_SS_1_5 = 8, + FIVR_SS_2 = 18, + FIVR_SS_3 = 28, + FIVR_SS_4 = 34, + FIVR_SS_5 = 39, + FIVR_SS_6 = 44, +}; + struct soc_intel_alderlake_config { /* Common struct containing soc config data required by common code */ @@ -495,6 +511,23 @@ struct soc_intel_alderlake_config { /* Platform Power Pmax */ uint16_t PsysPmax; + /* + * FivrRfiFrequency + * PCODE MMIO Mailbox: Set the desired RFI frequency, in increments of 100KHz. + * 0: Auto + * Range varies based on XTAL clock: + * 0-1918*100 KHz (Up to 191.8MHz) for 24MHz clock + * 0-1535*100 KHz (Up to 153.5MHz) for 19MHz clock + */ + uint32_t FivrRfiFrequency; + /* + * FivrSpreadSpectrum + * Set the Spread Spectrum Range. + * Range: 0.5%, 1%, 1.5%, 2%, 3%, 4%, 5%, 6%. + * Each Range is translated to an encoded value for FIVR register. + * 0.5% = 0, 1% = 3, 1.5% = 8, 2% = 18, 3% = 28, 4% = 34, 5% = 39, 6% = 44. + */ + uint8_t FivrSpreadSpectrum; }; typedef struct soc_intel_alderlake_config config_t; diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c index 9ed8acd743..17edada9ba 100644 --- a/src/soc/intel/alderlake/fsp_params.c +++ b/src/soc/intel/alderlake/fsp_params.c @@ -731,6 +731,14 @@ static void fill_fsps_fivr_params(FSP_S_CONFIG *s_cfg, config->ext_fivr_settings.vnn_icc_max_ma; } +static void fill_fsps_fivr_rfi_params(FSP_S_CONFIG *s_cfg, + const struct soc_intel_alderlake_config *config) +{ + /* transform from Hz to 100 KHz */ + s_cfg->FivrRfiFrequency = config->FivrRfiFrequency / (100 * KHz); + s_cfg->FivrSpreadSpectrum = config->FivrSpreadSpectrum; +} + static void soc_silicon_init_params(FSP_S_CONFIG *s_cfg, struct soc_intel_alderlake_config *config) { @@ -761,6 +769,7 @@ static void soc_silicon_init_params(FSP_S_CONFIG *s_cfg, fill_fsps_misc_power_params, fill_fsps_irq_params, fill_fsps_fivr_params, + fill_fsps_fivr_rfi_params, }; for (size_t i = 0; i < ARRAY_SIZE(fill_fsps_params); i++) |