[PATCH V3 5/7] drm: bridge: samsung-dsim: Dynamically configure DPHY timing

[Michael Walle]

> The DPHY timings are currently hard coded. Since the input
> clock can be variable, the phy timings 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.
> 
> The phy_mipi_dphy_get_default_config function configures the
> DPHY timings in pico-seconds, and a small macro converts those
> timings into clock cycles based on the pixel clock rate.

This actually fixes a bug with the DSI84 bridge on our boards. The
hardcoded settings will violate the D-PHY spec timings for lower
frequencies, esp. the Ths_prepare+Ths_zero timing. Thus, the bridge
will read a wrong HS sync sequence and set it's internal SoT error
bit (and don't generate any RGB signals on the LVDS side).

Tested-by: Michael Walle <michael at walle.cc>

Thanks!
-michael