Re: [PATCH v4 2/7] drm/panel: simple: Add ability to override typical timing

[Heiko Stübner]

Am Donnerstag, 28. März 2019, 18:17:05 CET schrieb Douglas Anderson:
> From: Sean Paul <seanpaul@xxxxxxxxxxxx>
> 
> This patch adds the ability to override the typical display timing for a
> given panel. This is useful for devices which have timing constraints
> that do not apply across the entire display driver (eg: to avoid
> crosstalk between panel and digitizer on certain laptops). The rules are
> as follows:
> 
> - panel must not specify fixed mode (since the override mode will
>   either be the same as the fixed mode, or we'll be unable to
>   check the bounds of the overried)
> - panel must specify at least one display_timing range which will be
>   used to ensure the override mode fits within its bounds
> 
> Changes in v2:
>  - Parse the full display-timings node (using the native-mode) (Rob)
> Changes in v3:
>  - No longer parse display-timings subnode, use panel-timing (Rob)
> Changes in v4:
>  - Don't add mode from timing if override was specified (Thierry)
>  - Add warning if timing and fixed mode was specified (Thierry)
>  - Don't add fixed mode if timing was specified (Thierry)
>  - Refactor/rename a bit to avoid extra indentation from "if" tests
>  - i should be unsigned (Thierry)
>  - Add annoying WARN_ONs for some cases (Thierry)
>  - Simplify 'No display_timing found' handling (Thierry)
>  - Rename to panel_simple_parse_override_mode() (Thierry)
> 
> Cc: Doug Anderson <dianders@xxxxxxxxxxxx>
> Cc: Eric Anholt <eric@xxxxxxxxxx>
> Cc: Heiko Stuebner <heiko@xxxxxxxxx>
> Cc: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Stéphane Marchesin <marcheu@xxxxxxxxxxxx>
> Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Tested-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>

on a rk3399-kevin and rk3288-jerry
Tested-by: Heiko Stuebner <heiko@xxxxxxxxx>