[S] Change in coreboot[master]: soc/intel/alderlake: Disable C1E on RPL CPUs

[Nick Vaccaro (Code Review)]

Nick Vaccaro has submitted this change. ( https://review.coreboot.org/c/coreboot/+/74727 )

Change subject: soc/intel/alderlake: Disable C1E on RPL CPUs
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soc/intel/alderlake: Disable C1E on RPL CPUs

Since disabling C1E could improve acoustic noise for RPL, add judgement
in SOC code to disable C1E on RPL CPUs and enabling it on ADL CPUs .

BUG=b:278654939
TEST:emerge-brya coreboot

Signed-off-by: Joey Peng 
Change-Id: Ic2d2d5d6075de25141c1d08ec18838731c63a342
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74727
Tested-by: build bot (Jenkins) 
Reviewed-by: Subrata Banik 
Reviewed-by: Nick Vaccaro 
---
M src/soc/intel/alderlake/fsp_params.c
1 file changed, 25 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Nick Vaccaro: Looks good to me, approved
  Subrata Banik: Looks good to me, approved

diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c
index 7789cec..d5fa51a 100644
--- a/src/soc/intel/alderlake/fsp_params.c
+++ b/src/soc/intel/alderlake/fsp_params.c
@@ -1011,6 +1011,11 @@
    	s_cfg->PkgCStateDemotion = 0;
    else
    	s_cfg->PkgCStateDemotion = !config->disable_package_c_state_demotion;
+
+	if (cpu_id == CPUID_RAPTORLAKE_P_J0 || cpu_id == CPUID_RAPTORLAKE_P_Q0)
+		s_cfg->C1e = 0;
+	else
+		s_cfg->C1e = 1;
 }

static void fill_fsps_irq_params(FSP_S_CONFIG *s_cfg,