[Linux-stm32] [PATCH v9 11/11] Documentation: gpu: todo: Add dw-mipi-dsi consolidation plan

[Daniel Vetter]

On Tue, Jun 9, 2020 at 6:25 PM Adrian Ratiu <adrian.ratiu at collabora.com> wrote:
>
> This documents the longer-term plan to cleanup the dw-mipi-dsi bridge
> based drivers after the regmap refactor and i.MX6 driver have landed.
>
> The goal is to get the entire bridge logic in one place and continue
> the refactorings under the drm/bridge tree.
>
> Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
> Cc: Boris Brezillon <boris.brezillon at collabora.com>
> Cc: Sam Ravnborg <sam at ravnborg.org>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Adrian Ratiu <adrian.ratiu at collabora.com>

This cc's the world, but not dri-devel. Can you pls resubmit with that added?

Thanks, Daniel

> ---
>  Documentation/gpu/todo.rst | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index 658b52f7ffc6c..2b142980a4b16 100644
> --- a/Documentation/gpu/todo.rst
> +++ b/Documentation/gpu/todo.rst
> @@ -548,6 +548,31 @@ See drivers/gpu/drm/amd/display/TODO for tasks.
>
>  Contact: Harry Wentland, Alex Deucher
>
> +Reorganize dw-mipi-dsi bridge-based host-controller drivers
> +-----------------------------------------------------------
> +
> +The Synopsys DW MIPI DSI bridge is used by a number of SoC platform drivers
> +(STM, Rockchip, i.MX) which don't cleanly encapsulate their bridge logic which
> +gets split between the Synopsys bridge (drm/bridge/synopsys/dw-mipi-dsi.c) and
> +platform drivers like drm/imx/dw_mipi_dsi-imx6.c by passing around the bridge
> +configuration regmap, creating new bridges / daisy chaining in platform drivers,
> +duplicating encoder creation, having too much encoder logic instead of using the
> +simple encoder interface and so on.
> +
> +The goal of this rework is to make the dw-mipi-dsi driver a better encapsulated
> +bridge by moving all bridge-related logic under drm/bridge, including the SoC
> +bindings which chain to the core Synopsys code under drm/bridge/dw-mipi-dsi/
> +from which they can be further consolidated and cleaned up.
> +
> +If this goal proves to be impossible then drm_bridge might not be the correct
> +abstraction for these host controllers and unifying their logic into a helper
> +library encapsulating a drm_encoder might be more desirable, in other words to
> +move away from drm_bridge entirely.
> +
> +Contact: Adrian Ratiu, Daniel Vetter, Laurent Pinchart
> +
> +Level: Intermediate
> +
>  Bootsplash
>  ==========
>
> --
> 2.27.0
>


-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch