What: /sys/bus/typec/devices/.../displayport/configuration
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Date: July 2018
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Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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Description:
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Shows the current DisplayPort configuration for the connector.
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Valid values are USB, source and sink. Source means DisplayPort
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source, and sink means DisplayPort sink.
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All supported configurations are listed as space separated list
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with the active one wrapped in square brackets.
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Source example:
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USB [source] sink
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The configuration can be changed by writing to the file
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Note. USB configuration does not equal to Exit Mode. It is
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separate configuration defined in VESA DisplayPort Alt Mode on
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USB Type-C Standard. Functionally it equals to the situation
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where the mode has been exited (to exit the mode, see
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Documentation/ABI/testing/sysfs-bus-typec, and use file
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/sys/bus/typec/devices/.../active).
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What: /sys/bus/typec/devices/.../displayport/pin_assignment
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Date: July 2018
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Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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Description:
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VESA DisplayPort Alt Mode on USB Type-C Standard defines six
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different pin assignments for USB Type-C connector that are
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labeled A, B, C, D, E, and F. The supported pin assignments are
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listed as space separated list with the active one wrapped in
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square brackets.
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Example:
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C [D]
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Pin assignment can be changed by writing to the file. It is
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possible to set pin assignment before configuration has been
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set, but the assignment will not be active before the
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connector is actually configured.
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Note. As of VESA DisplayPort Alt Mode on USB Type-C Standard
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version 1.0b, pin assignments A, B, and F are deprecated. Only
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pin assignment D can now carry simultaneously one channel of
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USB SuperSpeed protocol. From user perspective pin assignments C
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and E are equal, where all channels on the connector are used
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for carrying DisplayPort protocol (allowing higher resolutions).
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