diff options
| author | Meera Ravindranath <meera.ravindranath@intel.com> | 2022-10-10 10:48:18 +0530 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-10-27 00:34:35 +0000 |
| commit | 9e4488ab06fd9c434a958cfcc5bfd7893a64e1a6 (patch) | |
| tree | 29e4bfe7a442bc8f759e7f57c2682b4e93420607 /src/soc/intel | |
| parent | a00db94270f87a82dbe8d83f05f53dbefd0e5a64 (diff) | |
soc/intel/{adl,cmn}: Add/Remove LTR disqualification for UFS
a) Add LTR disqualification in D3 to ensure PMC ignores LTR
from UFS IP as it is infinite.
b) Remove LTR disqualification in _PS0 to ensure PMC stops
ignoring LTR from UFS IP during D3 exit.
c) Add Kconfig (SOC_INTEL_UFS_LTR_DISQUALIFY) check to apply
this LTR WA.
BUG=b:252975357
TEST=build and boot nirwen and see no issues in PLT runs
Signed-off-by: Meera Ravindranath <meera.ravindranath@intel.com>
Change-Id: I88772b0b7dde1fca0130472a38628e72dfd6c26c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68251
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/alderlake/Kconfig | 1 | ||||
| -rw-r--r-- | src/soc/intel/alderlake/include/soc/ufs.h | 3 | ||||
| -rw-r--r-- | src/soc/intel/common/block/acpi/Kconfig | 5 | ||||
| -rw-r--r-- | src/soc/intel/common/block/acpi/acpi/ufs.asl | 26 |
4 files changed, 34 insertions, 1 deletions
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig index fe7b3a229b..548ef3d712 100644 --- a/src/soc/intel/alderlake/Kconfig +++ b/src/soc/intel/alderlake/Kconfig @@ -428,6 +428,7 @@ config ACPI_ADL_IPU_ES_SUPPORT config ALDERLAKE_ENABLE_SOC_WORKAROUND bool default y + select SOC_INTEL_UFS_LTR_DISQUALIFY select SOC_INTEL_UFS_OCP_TIMER_DISABLE help Selects the workarounds applicable for Alder Lake SoC. diff --git a/src/soc/intel/alderlake/include/soc/ufs.h b/src/soc/intel/alderlake/include/soc/ufs.h index 3b5e33d0fb..e3a98f2e34 100644 --- a/src/soc/intel/alderlake/include/soc/ufs.h +++ b/src/soc/intel/alderlake/include/soc/ufs.h @@ -22,6 +22,7 @@ #define R_SCS_PCR_5820 0x5820 #define R_SCS_PCR_5C20 0x5C20 #define R_SCS_PCR_1078 0x1078 -#define R_PMC_PWRM_LTR_IGN 0x1B0C +#define R_PMC_PWRM_LTR_IGN 0x1b0c +#define PCH_PWRM_BASE_SIZE 0x1e30 #endif diff --git a/src/soc/intel/common/block/acpi/Kconfig b/src/soc/intel/common/block/acpi/Kconfig index 2b102bca42..bf5fa569d5 100644 --- a/src/soc/intel/common/block/acpi/Kconfig +++ b/src/soc/intel/common/block/acpi/Kconfig @@ -56,4 +56,9 @@ config SOC_INTEL_UFS_OCP_TIMER_DISABLE work around the Silicon Issue due to which LTR mechanism doesn't work. +config SOC_INTEL_UFS_LTR_DISQUALIFY + bool + help + LTR needs to be disqualified for UFS in D3 to ensure PMC + ignores LTR from UFS IP which is infinite. endif diff --git a/src/soc/intel/common/block/acpi/acpi/ufs.asl b/src/soc/intel/common/block/acpi/acpi/ufs.asl index f7cb9f336e..a2ddaa9c0a 100644 --- a/src/soc/intel/common/block/acpi/acpi/ufs.asl +++ b/src/soc/intel/common/block/acpi/acpi/ufs.asl @@ -1,7 +1,11 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <soc/iomap.h> #include <soc/pcr_ids.h> #include <soc/ufs.h> +#define TRUE 1 +#define FALSE 0 + Scope (\_SB.PCI0) { Device (UFS) @@ -59,6 +63,18 @@ Scope (\_SB.PCI0) PGEN, 1 } + OperationRegion(PWMR, SystemMemory, PCH_PWRM_BASE_ADDRESS, PCH_PWRM_BASE_SIZE) + Field(PWMR, DWordAcc, NoLock, Preserve) + { + Offset(R_PMC_PWRM_LTR_IGN), + , 18, + LTRU, 1, /* Bit 18 - Ignore LTR from UFS X2 */ + } + + Method (ULTR, 1, Serialized) { + LTRU = Arg0 + } + Method (_PS0, 0, Serialized) { /* Disable PG */ @@ -67,6 +83,11 @@ Scope (\_SB.PCI0) /* Set BIT[1:0] = 00b - Power State D0 */ PSTA &= 0xFFFFFFFC +#if CONFIG(SOC_INTEL_UFS_LTR_DISQUALIFY) + /* Remove Disqualification of LTR from UFS IP */ + ULTR (FALSE) +#endif + #if CONFIG(SOC_INTEL_UFS_OCP_TIMER_DISABLE) /* Disable OCP Timer in SCS UFS IOSF Bridge */ OCPD () @@ -75,6 +96,11 @@ Scope (\_SB.PCI0) Method (_PS3, 0, Serialized) { +#if CONFIG(SOC_INTEL_UFS_LTR_DISQUALIFY) + /* Disqualify LTR from UFS IP */ + ULTR (TRUE) +#endif + /* Enable PG */ PGEN = 1 } |