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 .
Signed-off-by: Marek Vasut <[email protected]> --- Cc: Andrzej Hajda <[email protected]> Cc: Conor Dooley <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: David Airlie <[email protected]> Cc: Jernej Skrabec <[email protected]> Cc: Jonas Karlman <[email protected]> Cc: Krzysztof Kozlowski <[email protected]> Cc: Laurent Pinchart <[email protected]> Cc: Lucas Stach <[email protected]> Cc: Maarten Lankhorst <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: Neil Armstrong <[email protected]> Cc: Rob Herring <[email protected]> Cc: Robert Foss <[email protected]> Cc: Thomas Zimmermann <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] --- V2: - Fix the type to u8 array - Fix the enum items to match what they represent --- .../display/bridge/toshiba,tc358767.yaml | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/toshiba,tc358767.yaml b/Documentation/devicetree/bindings/display/bridge/toshiba,tc358767.yaml index 2ad0cd6dd49e0..6287eb2b40908 100644 --- a/Documentation/devicetree/bindings/display/bridge/toshiba,tc358767.yaml +++ b/Documentation/devicetree/bindings/display/bridge/toshiba,tc358767.yaml @@ -98,6 +98,24 @@ properties: reference to a valid eDP panel input endpoint node. This port is optional, treated as DP panel if not defined + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + toshiba,pre-emphasis: + description: + Display port output Pre-Emphasis settings for both ports. + $ref: /schemas/types.yaml#/definitions/uint8-array + minItems: 2 + maxItems: 2 + items: + enum: + - 0 # No pre-emphasis + - 1 # 3.5dB pre-emphasis + - 2 # 6dB pre-emphasis + oneOf: - required: - port@0 -- 2.43.0
