[coreboot-gerrit] Change in coreboot[master]: mainboard/lenovo/t440p: Enable dGPU on Lenovo T440P

[Patrick Rudolph (Code Review)]

Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/38723 )

Change subject: mainboard/lenovo/t440p: Enable dGPU on Lenovo T440P
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Patch Set 3:
> Patch Set 3:
>
> What's the difference between dual graphics and hybrid graphics?
> T430 and T530 use DRIVERS_LENOVO_HYBRID_GRAPHICS, and T430s doesn't use this.

Hybrid graphics is a feature of dual graphics allowing to switch the display panel to either gpu at runtime.
To safe costs and higher throughput graphics interconnects newer platforms doesn't have this mux any more. Starting with the t430s, it only has dual graphics/Optimus.