[Libre-soc-dev] HDMI, DVI, DisplayPort on SBC (like Raspberry Pi) and on BMC

[Jacob Lifshay]

On Tue, Jan 26, 2021 at 9:17 PM Luke Kenneth Casson Leighton
<lkcl at lkcl.net> wrote:
>
> On Tuesday, January 26, 2021, Cole Poirier <colepoirier at gmail.com> wrote:
>
> >
> > I see. Unfortunately that doesn’t at all answer my question, can you
> please
> > respond directly to what I’m asking?
>
> as i explained on the call: it does answer the question, i just missed out
> the words "your suggestion missed the point" which is that the line drivers
> are not the major power consumption, the data routing completely dwarfs the
> IO Pad driving power draw.
>
> LPDDRX4 reduces IO PAD power draw.


I suspect that the data routing dwarfing the i/o pad power draw may
only apply for the application where you'd seen those figures,
otherwise no one would have bothered with reducing i/o pad power draw.
Also, 8x256-bit for a single 32-bit interface is crazily huge, I'd
expect a lot of applications to not use that many internal data
busses, reducing power draw.

Jacob