diff options
| author | Sean Rhodes <sean@starlabs.systems> | 2022-05-26 22:20:41 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-06-20 12:07:52 +0000 |
| commit | 9d894b856361f6f8978d6c27557f8dd0bd84d2df (patch) | |
| tree | 63bfee38338730e238f64b1b01526a9b8fc52cee /src/soc | |
| parent | 9088b681f539873e70a8904ca41165f3e830232f (diff) | |
soc/intel/apollolake: Hook up C1e to enhanced_cstates
Hook up C1e FSP S UPD which enables enhanced C-states, to
enhanced_cstates. This allows it to be enabled in the
devicetree with a value of "1" as the default is disabled.
C1e exists on both APL and GLK, and has been there since their
initial releases.
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ie803a75ac9fb64a6c21b31baeea7b736e4fbf5fa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64708
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/apollolake/chip.c | 3 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/chip.h | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c index 20bbde9288..e824328350 100644 --- a/src/soc/intel/apollolake/chip.c +++ b/src/soc/intel/apollolake/chip.c @@ -717,6 +717,9 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *silupd) silconfig->VmxEnable = CONFIG(ENABLE_VMX); + /* Enable enhanced C-states */ + silconfig->C1e = cfg->enhanced_cstates; + /* Set VTD feature according to devicetree */ silconfig->VtdEnable = get_uint_option("vtd", cfg->enable_vtd); diff --git a/src/soc/intel/apollolake/chip.h b/src/soc/intel/apollolake/chip.h index 209937d775..de3ba9780c 100644 --- a/src/soc/intel/apollolake/chip.h +++ b/src/soc/intel/apollolake/chip.h @@ -135,6 +135,9 @@ struct soc_intel_apollolake_config { uint8_t hdaudio_pwr_gate_enable; uint8_t hdaudio_bios_config_lockdown; + /* Enhanced C-states */ + int enhanced_cstates; + /* SLP S3 minimum assertion width. */ int slp_s3_assertion_width_usecs; |