Add a new method to write the contents of a framebuffer to a file
descriptor. This can be used to capture frames from writeback
connectors.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

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>

Also add PropertyType which is used by the type property.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@iki.fi>

Add 'system-pybind11' option.

enabled = use pybind11 from the system
disabled = use pybind11 from meson subproject
auto = use pybind11 from the system, or, if not available, subproject

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>