soc/intel/alderlake: Disable package C-state demotion for Raptor Lake
While executing S0ix tests on Raptor Lake boards, we observed CPU fails
to enter suspend state, causing failure.
As a workaround, disable package C-state demotion, till this issue
is fixed in ucode.
BUG=268296760
BRANCH=firmware-brya-14505.B
TEST=Boot and verified that S0ix issue is resolved.
Signed-off-by: Anil Kumar <anil.kumar.k@intel.com>
Change-Id: Ie50e1024f4118d82d2ad762b54fa722c43990d12
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72942
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c
index 4117c22..42475c4 100644
--- a/src/soc/intel/alderlake/fsp_params.c
+++ b/src/soc/intel/alderlake/fsp_params.c
@@ -937,6 +937,7 @@
static void fill_fsps_misc_power_params(FSP_S_CONFIG *s_cfg,
const struct soc_intel_alderlake_config *config)
{
+ u32 cpu_id = cpu_get_cpuid();
/* Skip setting D0I3 bit for all HECI devices */
s_cfg->DisableD0I3SettingForHeci = 1;
/*
@@ -1005,7 +1006,11 @@
s_cfg->VrPowerDeliveryDesign = config->vr_power_delivery_design;
- s_cfg->PkgCStateDemotion = !config->disable_package_c_state_demotion;
+ /* FIXME: Disable package C state demotion on Raptorlake as a W/A for S0ix issues */
+ if ((cpu_id == CPUID_RAPTORLAKE_P_J0) || (cpu_id == CPUID_RAPTORLAKE_P_Q0))
+ s_cfg->PkgCStateDemotion = 0;
+ else
+ s_cfg->PkgCStateDemotion = !config->disable_package_c_state_demotion;
}
static void fill_fsps_irq_params(FSP_S_CONFIG *s_cfg,