Re: Developing a new backlight driver for specific OLED screen

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On Fri, Sep 09, 2022 at 11:35:28AM +0200, Aurélien wrote:
>    Hi,
>    I hope this mailing-mist is the right place for this question.

+ dri-devel mailing list that looks more appropriated.
+ Hans and Lyude who were recently working to standardize some of the
backlight stuff.

>    I would like to develop a new driver in order to manage backlight for a
>    specific OLED display (Samsung one). For that propose I need to use the
>    dpcd aux read and write functions.
>    Since this driver is independent film the i915 driver I would like to
>    develop an indémependant driver.
>    So my question is: how can I use the i915 API (dpcd aux communications)
>    outside from the driver and register the backlight sys entries like the
>    i915 does (in order to have all the softwares which plays with the
>    backlight working without modifying them) ?

I don't believe you want to use the i915 API, but move the common functions
to the drm subsystem itself and then reuse as a drm device.

>    Many thanks for your answers
>    --
>    Aurélien



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