During power collapse, video driver would power collapse video
hardware followed by video controller.
While power collapsing video hardware, it may happen that video
firmware has already power collapsed the video hardware, since
it is hardware controlled. For certain cases, like XS WD, it
may happen that video hardware may not be power collapsed by
video firmware. In such scenario, skipping power collapse sequence
of video hardware would lead to unhandled transactions from video
hardware.
There is a power status register which can clearly suggest if the
video hardware is power down or not. Added a check to confirm the
power status of video hardware before skipping or executing the
power collapse sequence for video hardware.
Change-Id: Ibd9cd708a259897262fcc6cab27b26aaf37f1b13
Signed-off-by: Vikash Garodia <quic_vgarodia@quicinc.com>
9f34254da3