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

[Adrian Ratiu]

On Tue, 09 Jun 2020, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> 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? 

Yes, sorry about omitting dri-devel, it was unintentional. Will 
resubmit the same version.

Adrian

>
> 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