Display Port support for AST 2600.

[Paul Fertser]

Hi,

On Wed, Feb 28, 2024 at 12:05:35PM +0530, AKASH G J wrote:
> I want to take display output of host via AST2600 Display Port Interface.
> How to enable display port support in BMC firmware for AST2600?

It's essential to have CONFIG_ASPEED_DP=y in _U-Boot_ config for DP
output to work. Because for whatever odd reason "The MCU FW controling
ASPEED DP is loaded by BMC boot loader."[0] And if it's not loaded
Linux just silently fails.

For Linux DT you might need to check that &video and &gfx are enabled.

With this the host system should see a video card on PCIe bus and if
you followed the reference schematics the image should appear on
AST2600 DP output.

HTH

[0] https://lists.freedesktop.org/archives/dri-devel/2021-November/331941.html
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