drm/ast: astdp: Wake up during connector status detection

Power up the ASTDP connector for connection status detection if the
connector is not active. Keep it powered if a display is attached.

This fixes a bug where the connector does not come back after
disconnecting the display. The encoder's atomic_disable turns off
power on the physical connector. Further HPD reads will fail,
thus preventing the driver from detecting re-connected displays.

For connectors that are actively used, only test the HPD flag without
touching power.

Fixes: f81bb0ac7872 ("drm/ast: report connection status on Display Port.")
Cc: Jocelyn Falempe <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: [email protected]
Cc: <[email protected]> # v6.6+
Signed-off-by: Thomas Zimmermann <[email protected]>
Reviewed-by: Jocelyn Falempe <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions