[Freedreno] [PATCH v3 2/6] drm/msm/dp: Add DP controllers for sc7280

[Stephen Boyd]

Quoting Sankeerth Billakanti (2021-10-27 18:54:44)
> The eDP controller on SC7280 is similar to the eDP/DP controllers
> supported by the current driver implementation.
>
> SC7280 supports one EDP and one DP controller which can operate
> concurrently.
>
> This change adds the support for eDP and DP controller on sc7280.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka at quicinc.com>
>
> changes in v3:
>     - Split into patches according to function (Dmitry Baryshkov)
>     - Use DP_CONTROLLER_1 for eDP controller intf (Dmitry Baryshkov)
>     - Use DP_CONTROLLER_0 for sc7280-dp (Dmitry Baryshkov)
>     - Add macro in drm_helper.h for checking ssc capability (Stephen Boyd)
>     - Use existing macro to check assr capability (Stephen Boyd)
>     - Add comment for HPD_INIT_SETUP delay (Stephen Boyd)
>
> changes in v2:
>     - Don't initialize variables to 0 (Stephen Boyd)
>     - Use const for read-only dpcd (Stephen Boyd)
>     - Remove zero pixel clock check (Stephen Boyd)
>     - Sort compatible strings alphabetically (Stephen Boyd)
>     - Use pwm_bl.c for backlight instead of gpio (Stephen Boyd)
>     - Change return type for functions returning always 0 (Matthias Kaehlcke)
> ---

Reviewed-by: Stephen Boyd <swboyd at chromium.org>