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Enable enumeration of writeback connectors if both libdrm and the device
support it. The new Card::has_writeback() method report if the card
support writeback connectors.
Existing code that expect all connectors to model an output may be
confused by the sudden availability of new connectors. To handle this
issue,
- add a KMSXX_DISABLE_WRITEBACK_CONNECTORS environment variable to
disable enumeration of writeback connectors, similarly to universal
planes ; and
- ignore writeback connectors where no specific connector is requested
(Card::get_first_connected_connector(),
ResourceManager::reserve_connector() if no connector name is
specified, and applications that use all connected outputs).
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
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Let's try again with the card constructors.
Card::open_modesetting_card() is removed.
The main constructor is Card(const std::string& dev_path = "").
If dev_path is set, the device node with that path is used. If dev_path
is not set, the behavior is similar as previously, except a modeset
capable card is used at the third step:
- If KMSXX_DEVICE env variable is set, the card device with that path is
opened.
- If KMSXX_DRIVER env variable is set, the card with the given driver
name and index is opened. The format is either "drvname" or
"drvname:idx".
- If neither env variable is given, the first modeset capable card is
opened.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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