On Mon, May 27, 2024 at 03:58:06PM +0200, Maxime Ripard wrote:
> The Broadcast RGB property has been documented as three separate entries
> so far, each with a different set of values.
>
> The first one is pretty much the generic one: it's used by i915 and vc4,
> and is the one used by all the compositors.
>
> The second one is used by the gma500 driver, and is a subset of the
> first one: it can have the values "Full" or "Limited 16:235", but lack
> the "Automatic" value.
>
> The third one however isn't used by any driver and documents the values
> "off", "auto" and "on".
>
> It's unclear where the last one comes from. It was first documented in
> commit 6c6a3996f2c5 ("Documentation: drm: describing drm properties
> exposed by various drivers") which adds a number of properties used by
> drivers, but without mentioning which driver was using what property.
>
> Grepping at the 6c6a3996f2c5 commit however, it looks like no driver is
> actually using it, and a quick look at the entire kernel history doesn't
> show any match either.
>
> At the time though, gma500 had an "audio" property used right next to
> Broadcast RGB that did have the "off", "auto" and "on" values in the
> same order.
>
> As such, it was probably a copy/paste or scripting error back then, and
> there's never been such property used in the kernel.
>
> Either way, it certainly hasn't been used in a decade or two so we can
> just get rid of it.
>
> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
> ---
> Documentation/gpu/kms-properties.csv | 1 -
> 1 file changed, 1 deletion(-)
>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
--
With best wishes
Dmitry
