[PATCH 4/6] drm: bridge: samsung-dsim: Dynamically configure DPHY timing

[Adam Ford]

On Mon, Apr 17, 2023 at 3:38 AM Lucas Stach <l.stach at pengutronix.de> wrote:
>
> Hi Adam,
>
> Am Samstag, dem 15.04.2023 um 05:41 -0500 schrieb Adam Ford:
> > NXP uses a lookup table to determine the various values for
> > the PHY Timing based on the clock rate in their downstream
> > kernel.  Since the input clock can be variable, the phy
> > settings need to be variable too.  Add an additional variable
> > to the driver data to enable this feature to prevent breaking
> > boards that don't support it.
> >
>
> I haven't checked if this generates values close to the ones in this
> table, but I guess it should be worth a try to use
> phy_mipi_dphy_get_default_config() instead.

I didn't know that was a thing.  I like that idea much better than the
table.  I just pulled what NXP had and tweaked it to fit the mainline.
I'll give it a try in the next few days, when I have some more time.

adam
>
> Regards,
> Lucas
>
> > Signed-off-by: Adam Ford <aford173 at gmail.com>
> > ---
> >  drivers/gpu/drm/bridge/samsung-dsim.c |  85 +++++++--
> >  drivers/gpu/drm/bridge/samsung-dsim.h | 254 ++++++++++++++++++++++++++
> >  include/drm/bridge/samsung-dsim.h     |   1 +
> >  3 files changed, 326 insertions(+), 14 deletions(-)
> >  create mode 100644 drivers/gpu/drm/bridge/samsung-dsim.h
> >
<snip>
>