[U-Boot] [RFC] Migrating iMX LCDIF drivers to Driver Model

[Simon Glass]

Hi,

On Tue, 16 Apr 2019 at 16:28, Peng Fan <peng.fan at nxp.com> wrote:

> HI Igor,
>
> >
> > Marek, Peng,
> >
> > Writing to you as you were the main contributors to U-boot mxsfb driver
> > implementation (i.MX23/i.MX28 LCDIF driver).
> >
> > I was about to start working on it's migration to DM (currently mxsfb is
> being
> > used on our SoM Colibri iMX7S/D), but found it a bit out-dated (no one
> > introduced any changes for the last 5 years) and maybe it's really does
> make a
> > sense to fetch and port the latest one from the Linux mainline (in a
> sake of
> > avoiding divergence in implementation and continue fetching future
> updates
> > from the Linux kernel).
> >
> > So there are 2 questions spinning in my mind:
> > 1) In case if you are maybe aware, if there were any intentions to do
> this
> > migration before?  (maybe someone asked similar questions or even send
> > some patches, but didn't manage to upstream that; or did similar stuff
> in some
> > downstream U-boot forks, whatever). Unfortunately I can't any information
> > regarding this in U-boot ML archives .
>
> I do not have plan to work on this recently.
>
> >
> > 2) Will it be OK if I introduce a brand new mxsfb driver (ported from
> Linux),
> > which will be used only when U-boot is built with CONFIG_DM_VIDEO
> > enabled? Existing mxsfb will be left as it is, so I can be removed
> easily when
> > full migration to DM is done for all boards that are using this driver.
>
> You mean porting drivers/gpu/drm/mxsfb/ to U-Boot?
>

DM_VIDEO will be compulsory soon anyway, so I think this is fine.

Regards,
Simon