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>
