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 <ma...@denx.de>
---
Cc: Andrzej Hajda <andrzej.ha...@intel.com>
Cc: Conor Dooley <conor...@kernel.org>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: David Airlie <airl...@gmail.com>
Cc: Jernej Skrabec <jernej.skra...@gmail.com>
Cc: Jonas Karlman <jo...@kwiboo.se>
Cc: Krzysztof Kozlowski <krzk...@kernel.org>
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Maxime Ripard <mrip...@kernel.org>
Cc: Neil Armstrong <neil.armstr...@linaro.org>
Cc: Rob Herring <r...@kernel.org>
Cc: Robert Foss <rf...@kernel.org>
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: devicet...@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: ker...@dh-electronics.com
---
.../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..dcf56e996ee22 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/uint32-array
+ minItems: 2
+ maxItems: 2
+ items:
+ enum:
+ - 0 # -6dB de-emphasis
+ - 1 # -3.5dB de-emphasis
+ - 2 # No de-emphasis
+
oneOf:
- required:
- port@0
--
2.43.0
