UPSTREAM: soc/intel/meteorlake: Provide mitigation support for CNVi RFI
The DDR RFIM is a frequency shifting RFI mitigation feature required by
the Intel integrated Wi-Fi firmware(CNVi) for Meteor Lake. Please refer
to Intel technical white paper 640438_Intel_DDR_Mem_RFIM_Policy_Enable
once it is externally available. This change has backport changes from
commit hash 6f73a20 (soc/intel/alderlake: Move CnviDdrRfim property to
drivers) and provides the CNVi RFIM support for Meteor Lake.
BUG=b:248391777
TEST=Booted to OS on Rex. Looked the DDR_DVFS_RFI_CONFIG_PCU_REG
register at the offset 0x5A40 of Mchbar and verified the BIT0
(RFI_DISABLE bit) is 0.
(cherry picked from commit a923a431c6f10da70bec075583d4eb9ddaccacac)
Original-Change-Id: I87110bc10b98a27a8f274680597b15a1df488824
Original-Signed-off-by: zhaojohn <john.zhao@intel.com>
Original-Reviewed-on: https://review.coreboot.org/c/coreboot/+/67789
Original-Reviewed-by: Subrata Banik <subratabanik@google.com>
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Original-Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
GitOrigin-RevId: a923a431c6f10da70bec075583d4eb9ddaccacac
Change-Id: I915e9c15b692f4f825149026eb8a35908611c90a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/4007455
Commit-Queue: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Tested-by: CopyBot Service Account <copybot.service@gmail.com>
diff --git a/src/soc/intel/meteorlake/romstage/fsp_params.c b/src/soc/intel/meteorlake/romstage/fsp_params.c
index 0ca3756..0b7e79e 100644
--- a/src/soc/intel/meteorlake/romstage/fsp_params.c
+++ b/src/soc/intel/meteorlake/romstage/fsp_params.c
@@ -5,6 +5,7 @@
#include <cpu/intel/cpu_ids.h>
#include <cpu/x86/msr.h>
#include <device/device.h>
+#include <drivers/wifi/generic/wifi.h>
#include <fsp/fsp_debug_event.h>
#include <fsp/util.h>
#include <intelblocks/cpulib.h>
@@ -199,6 +200,19 @@
memset(m_cfg->PchHdaAudioLinkSndwEnable, 0, sizeof(m_cfg->PchHdaAudioLinkSndwEnable));
}
+static void fill_fspm_cnvi_params(FSP_M_CONFIG *m_cfg,
+ const struct soc_intel_meteorlake_config *config)
+{
+ /* CNVi DDR RFI Mitigation */
+ const struct device_path path[] = {
+ { .type = DEVICE_PATH_PCI, .pci.devfn = PCI_DEVFN_CNVI_WIFI },
+ { .type = DEVICE_PATH_GENERIC, .generic.id = 0 } };
+ const struct device *dev = find_dev_nested_path(pci_root_bus(), path,
+ ARRAY_SIZE(path));
+ if (is_dev_enabled(dev))
+ m_cfg->CnviDdrRfim = wifi_generic_cnvi_ddr_rfim_enabled(dev);
+}
+
static void fill_fspm_ish_params(FSP_M_CONFIG *m_cfg,
const struct soc_intel_meteorlake_config *config)
{
@@ -281,6 +295,7 @@
fill_fspm_smbus_params,
fill_fspm_misc_params,
fill_fspm_audio_params,
+ fill_fspm_cnvi_params,
fill_fspm_pcie_rp_params,
fill_fspm_ish_params,
fill_fspm_tcss_params,
