Tiger Lake FSP has problem with DDI TCP HDMI port

intel / FSP

Intel(R) Firmware Support Package (FSP)

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Tiger Lake FSP has problem with DDI TCP HDMI port #68

Closed PennZheng closed 3 years ago

PennZheng commented 3 years ago

Hi,

I'm working on a new designed Tiger Lake-U board. The Slim Bootloader and UEFI Payload I used was download on April 2021.

I encounter a problem that the DDI TCP1 HDMI port cannot work in SBL with FSP provided GOP driver. The hardware design may be no problem since the DDI TCP1 HDMI port can function properly in Windows 10 with Intel Graphics Driver.

Do you have any idea on this problem?

Thanks

swong23 commented 3 years ago

Clarification needed: -> What does it mean by: "The hardware design may be no problem since the DDI TCP1 HDMI port can function properly in Windows 10 with Intel Graphics Driver."?

If it cannot work in SBL with FSP provided GOP driver,
How it able to function properly in Windows 10 with Intel Graphics Driver?

Thanks!

PennZheng commented 3 years ago

I mean the DDI TCP1 HDMI port cannot work before UEFI Payload boot Windows 10.

The monitor does not show the Slim Bootloader logo when SBL is running.
It says in the SBL debug log: "Failed to get GFX HOB from FSP".

Thanks