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Since the MNT Reform was mentioned in the article, it's worth pointing out that the way they handled this was to have HDMI disabled by default, and the user can then run a script to re-enable HDMI and reboot. When HDMI is disabled, the only non-free blob left is the DDR4 controller training blob.

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Author here. MNT actually went out of their way to make sure you could use the device without this blob: rather than do the obvious thing and wire up HDMI or DP to the laptop's internal display (both of which require the blob), they used the MIPI DSI interface and a DSI to eDP converter chip.

But yeah, if you want to use the external HDMI port on the laptop, you need the blob.

What does the DSI to eDP converter chip run? Does it have internal flash or just a bootrom running the firmware?

I don't believe it is known to have any firmware.

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