From 377845a9d4f306082b8fcce3802f0d5e880647f3 Mon Sep 17 00:00:00 2001 From: CoolStar Date: Fri, 23 Feb 2024 12:09:22 -0800 Subject: soc/intel/tigerlake: Fix processor hang while plug unplug of TBT device Port 9c348a7b7ea3 ("soc/intel/alderlake: Fix processor hang while plug unplug of TBT device") from Alder Lake to fix a similar issue present on Tiger Lake: > Processor hang is observed while hot plug unplug of TBT device. BIOS > should execute TBT PCIe RP RTD3 flow based on the value of > TBT_DMA_CFG_VS_CAP_9[30]. It should skip TBT PCIe RP RTD3 flow, if > BIT30 in TBT FW version is not set. > BUG=b:194880254 > https://review.coreboot.org/c/coreboot/+/56503 Change-Id: Ie5409111d4239be86c0b153f01b4fe5fc6af352c Signed-off-by: CoolStar Reviewed-on: https://review.coreboot.org/c/coreboot/+/80718 Reviewed-by: Matt DeVillier Reviewed-by: Paul Menzel Tested-by: build bot (Jenkins) --- src/soc/intel/tigerlake/acpi/tcss.asl | 8 ++++++++ src/soc/intel/tigerlake/acpi/tcss_dma.asl | 3 ++- 2 files changed, 10 insertions(+), 1 deletion(-) (limited to 'src/soc') diff --git a/src/soc/intel/tigerlake/acpi/tcss.asl b/src/soc/intel/tigerlake/acpi/tcss.asl index 5af78edb8a..608b46450d 100644 --- a/src/soc/intel/tigerlake/acpi/tcss.asl +++ b/src/soc/intel/tigerlake/acpi/tcss.asl @@ -567,6 +567,10 @@ Scope (\_SB.PCI0) /* DMA0 is not in D3Cold now. */ \_SB.PCI0.TDM0.D3CE() /* Enable DMA RTD3 */ + If (\_SB.PCI0.TDM0.IF30 != 1) { + Return + } + Printf("Push TBT RPs to D3Cold together") If (\_SB.PCI0.TRP0.VDID != 0xFFFFFFFF) { /* Put RP0 to D3 cold. */ @@ -622,6 +626,10 @@ Scope (\_SB.PCI0) /* DMA1 is not in D3Cold now */ \_SB.PCI0.TDM1.D3CE() /* Enable DMA RTD3. */ + If (\_SB.PCI0.TDM0.IF30 != 1) { + Return + } + Printf("Push TBT RPs to D3Cold together") If (\_SB.PCI0.TRP2.VDID != 0xFFFFFFFF) { /* Put RP2 to D3 cold. */ diff --git a/src/soc/intel/tigerlake/acpi/tcss_dma.asl b/src/soc/intel/tigerlake/acpi/tcss_dma.asl index 90824698bb..2586ecbbc7 100644 --- a/src/soc/intel/tigerlake/acpi/tcss_dma.asl +++ b/src/soc/intel/tigerlake/acpi/tcss_dma.asl @@ -11,7 +11,8 @@ Field (DPME, AnyAcc, NoLock, Preserve) , 6, PMES, 1, /* 15, PME_STATUS */ Offset(0xC8), /* 0xC8, TBT NVM FW Revision */ - , 31, + , 30, + IF30, 1, /* ITBT FW Version Bit30 */ INFR, 1, /* TBT NVM FW Ready */ Offset(0xEC), /* 0xEC, TBT TO PCIE Register */ TB2P, 32, /* TBT to PCIe */ -- cgit v1.2.3