[PATCH v2 2/2] drm/msm/dsi: add support for dsi test pattern generator

[Stephen Boyd]

Quoting Abhinav Kumar (2021-07-21 19:50:32)
> During board bringups its useful to have a DSI test pattern
> generator to isolate a DPU vs a DSI issue and focus on the relevant
> hardware block.
>
> To facilitate this, add an API which triggers the DSI controller
> test pattern. The expected output is a rectangular checkered pattern.
>
> This has been validated on a single DSI video mode panel by calling it
> right after drm_panel_enable() which is also the ideal location to use
> this as the DSI host and the panel have been initialized by then.
>
> Further validation on dual DSI and command mode panel is pending.
> If there are any fix ups needed for those, it shall be applied on top
> of this change.
>
> Changes in v2:
>  - generate the new dsi.xml.h and update the bitfield names
>
> Signed-off-by: Abhinav Kumar <abhinavk at codeaurora.org>
> ---

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