hwc: Add support for HDMI as Primary display
We are adding support for HDMI as Primary to the display HAL.
The HAL must be able to support boot-up use cases and cable
connect/disconnect events as follows:
1. Boot up with HDMI cable connected
For this scenario we read the best mode supported by the
HDMI TV and set that as the current and default mode for
subsequent boot up.
2. Boot up without HDMI cable connected
We read a default resolution from the driver by reading vscreen
and reporting this as the display resolution to SF.
3. Switch the display to active state when we receive first frame
When HDMI is primary we should rely on the first valid
draw call in order to activate the display
4. Update handling of uevents when HDMI is primary
a) Do not send hot plug when the cable is connected/disconnected.
b) Use the correct display ID in uevents when HDMI is primary
5. Handle display timeout when HDMI is Primary
When HDMI is connected as primary we clean up resources
and call commit to generate a black frame on the interface.
However, we do not call blank since we need the timing
generator and HDMI core to remain turned on.
6. Clear pipe resource when HDMI is disconnected
When HDMI is primary, we need to make sure that SF/HWC does
not have any open fd's when the cable is disconnected.
We clear all pipe resources and call a display commit to ensure
that all the fd's are closed. This will ensure that the HDMI
core turns off and that we receive an event the next time the
cable is connected.
Change-Id: Ice70add583a3859f99bfa2e384fbbb6df4df92e1
5 files changed