Re: [PATCH v1 4/4] drm/panel: ili9806e: Break some CMDS into helper functions

[neil . armstrong]

On 11/07/2024 21:36, Doug Anderson wrote:
> Hi,
>
> On Wed, Jul 10, 2024 at 6:09 PM cong yang
> <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> > Hi,
> >
> > Michael Walle <mwalle@xxxxxxxxxx> 于2024年7月11日周四 03:38写道：
> > > On Wed Jul 10, 2024 at 9:12 PM CEST, Doug Anderson wrote:
> > > > Hi,
> > > >
> > > > On Wed, Jul 10, 2024 at 2:02 AM Michael Walle <mwalle@xxxxxxxxxx> wrote:
> > > > > On Wed Jul 10, 2024 at 10:47 AM CEST, Cong Yang wrote:
> > > > > > Break select page cmds into helper function.
> > > > >
> > > > > Why though? I don't find that anything easier to read. In fact, I
> > > > > deliberately chose not to factor that out into a function. It's just
> > > > > a sequence of magic commands, taken straight from the datasheet. So,
> > > > > I'd like to keep it that way.
> > > >
> > > > The consensus of previous discussion on the lists was that folks
> > > > agreed that we should, where possible, make it more obvious what these
> > > > magic sequences of commands were doing. IMO separating out the page
> > > > switch command helps. Certainly I'm always happy to hear other
> > > > opinions, though.
> > >
> > > Fair enough, but in that case, one should take the datasheet (which
> > > you can find online) and replace all the magic numbers with the
> > > correct command names from it. E.g. 0xff is the ENEXTC register. To
> > > be clear, I'm not just talking about the "switch page command".
> > >
> > > As patch stands, I don't see much value, TBH. On the contrary, you
> > > make it harder to compare it with the Ortustech panel datasheet.
> > >
> > > just my 2c,
> > > -michael
> >
> > If all drivers replace all the magic numbers with the correct command names,
> > it will be a huge amount of work (assuming that the datasheet can be found).
> >   I am afraid I don't have enough time to complete it.  Thanks.
>
> Makes sense. I'd be interested in hearing the opinion of others in the
> DRM community about whether they'd prefer to land something long this
> patch as-is or drop it.

I don't have a strong opinion, but I think only changing the switch
page operations doesn't make a lot of sense by itself.

Having a much larger register coverage would be preferred.

Neil

> -Doug