Re: [PATCH v3 2/2] drm/tiny: add support for PIXPAPER 4.26 monochrome e-ink panel

[LiangCheng Wang <zaq14760@gmail.com>]

Hi Thomas,

> There's also the ssd130x driver under solomon/ how does it related to
> the ssd16xx? Is that similar as well?

They share the vendor, but not much else as far as I can tell - Javier
will know ssd130x far better than I do.

It is an OLED driver over regmap, while ssd16xx is e-paper over raw SPI
with a BUSY handshake, RAM address windows and waveform LUTs.  The
register maps do not overlap, so I doubt there is much the two could
share.

Its shape does look like a good model though - one driver covering three
sub-families through a variant table.  And if you would prefer ssd16xx to
sit in drivers/gpu/drm/solomon/ next to it, that is fine by me.

> If the ssd16xx does not make progress, we could also try to merge your
> code as ssd16xx and Devarsh would then add support for additional ICs on
> top.

Thank you - I would be glad to help that way if it comes to it.

Devarsh, it is your series though, so please say if you would rather carry
it yourself; I would only pick it up with your agreement.

I should also be honest about what I could offer: only what the SSD1677
and the PIXPAPER 4.26m need, arranged so that further controllers can be
added on top.  This panel is the only SSD16xx hardware I have, so I could
not implement or test the others.  If that is too small a starting point,
I quite understand.

Regards,
LiangCheng