Re: [PATCH v4 1/2] dt-bindings: display: bridge: tc358867: Document default DP preemphasis

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On Mon, 08 Jul 2024 17:01:13 +0200, Marek Vasut wrote:
> Document default DP port preemphasis configurable via new DT property
> "toshiba,pre-emphasis". This is useful in case the DP link properties
> are known and starting link training from preemphasis setting of 0 dB
> is not useful. The preemphasis can be set separately for both DP lanes
> in range 0=0dB, 1=3.5dB, 2=6dB .
> 
> This is an endpoint property, not a port property, because the TC9595
> datasheet does mention that the DP might operate in some sort of split
> mode, where each DP lane is used to feed one display, so in that case
> there might be two endpoints.
> 
> Signed-off-by: Marek Vasut <marex@xxxxxxx>
> ---
> Cc: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> Cc: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
> Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxxx>
> Cc: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
> Cc: Jonas Karlman <jonas@xxxxxxxxx>
> Cc: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
> Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: Maxime Ripard <mripard@xxxxxxxxxx>
> Cc: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>
> Cc: Robert Foss <rfoss@xxxxxxxxxx>
> Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: kernel@xxxxxxxxxxxxxxxxxx
> ---
> V2: - Fix the type to u8 array
>     - Fix the enum items to match what they represent
> V3: - Update commit message, expand on this being an endpoint property
> V4: - Fix ref: /schemas/graph.yaml#/$defs/port-base and add unevaluatedProperties
> ---
>  .../display/bridge/toshiba,tc358767.yaml      | 21 ++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>




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