[PATCH v2] drm/panel: db7430: Add driver for Samsung DB7430

[Dillon Hua]

Hi Linus

Linus Walleij <linus.walleij at linaro.org> 于2021年6月5日周六 上午7:19写道：
>
> On Tue, Jun 1, 2021 at 11:31 PM Doug Anderson <dianders at chromium.org> wrote:
>
> > Still hoping that this can work atop DBI so we can avoid the raw SPI
> > writes. You said you're trying for it for v3 so I'm looking forward to
> > checking it out there.
>
> Struggling with this. The DBI bus is only used by tiny DRM
> for the panel drivers that are jitted with that display controller
> ATM. No normal panel driver is using it.

Quite similar to my ili9341 driver submission last year [1].
I guess, if it just simply combines tinyDRM and dpi driver
into one source code like what i was doing. it's might not
easy to get accepted from maintainers.

Anyway, there was a discussion on support dbi & dsi by one
driver [2], hope it'll give some help for you on this work.

[1] https://lore.kernel.org/lkml/1590378348-8115-7-git-send-email-dillon.minfei@gmail.com/
[2] https://lists.freedesktop.org/archives/dri-devel/2020-May/267031.html

Best Regards.
Dillon

>
> > panel-simple also sets the bpc in the "display_info". Do you need to?
> >
> > I didn't see a reply, so I'm still curious about the answer.
>
> I think it depends on whether the display controller/bridge actually
> make use of this or not. It is implied from the MEDIA_BUS_FMT*
> in practice and this controller (MCDE) only had settings for
> BPP, no fine grained bits to fiddle for BPC.
>
> But I added it for completeness, why not! Who knows who else
> will come along. I think I should patch a few other drivers with
> this as well.
>
> Yours,
> Linus Walleij