Re: [PATCH v2 05/11] drm/panel: Add panel driver for Samsung SOFEF01 DDIC

[Marijn Suijten <marijn.suijten@somainline.org>]

On 2025-12-26 18:43:03, Linus Walleij wrote:
> On Fri, Dec 26, 2025 at 3:16 PM Marijn Suijten
> <marijn.suijten@somainline.org> wrote:
> > On 2025-12-26 14:21:37, Linus Walleij wrote:
> 
> > > The sofef00 driver tell us exactly what this sequence is:
> > >
> > > #define sofef00_test_key_on_lvl2(ctx) \
> > >         mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0x5a, 0x5a)
> > > #define sofef00_test_key_off_lvl2(ctx) \
> > >         mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0xa5, 0xa5)
> > >
> > > I would just rename these two to sofef01_test_key_on/off_lvl2()
> > > and use the same helpers in this driver to follow the sofef00 pattern.
> >
> > Right, yes.  I think I already brought this up in V1, that some existing
> > Samsung drivers call this (the 0xf0 part) the MCS PASSWORD, others call it the
> > LEVEL_2_KEY or USER_KEY or ACCESSPROT.
> 
> Actually all of the samsung s6e panels are suspected to be s0fef0/1

Just noting the first 0 is actually the letter o.

> display controller variants, which you see if you look inside
> panel-samsung-s6e*, for example panel-samsung-s6e3fc2x01.c has this:

...

> I think the s0fef0/1 drivers and all the panel-samsung-s6e* drivers
> should probably be unified a bit maybe we can just create a
> local s0fef.h file with the above for all these drivers to use?
> 
> (If someone has actual datasheets for s0fef0/1 that would be great.)

If we know exactly what the commands are, and have their arguments documented,
it'd be nice to have these as constants and functions in a global reusable
header, but it does require being absolutely certain on their meaning and
equivalence.

- Marijn