msm: sde: add early display handoff feature.

When enabling animation/state splash in LK, drm/kms driver needs
to involve handoff code to support smooth transition. In display
probe it will do following items:
1. Check the status in LK for early splash.
2. Handle SMMU mapping issue to avoid SMMU fault problem.
3. Reserved memory, and bypass hardware reset to avoid glitch.

And after user's space is up, when first commit comes, it will call
sde_splash_clean_up to:
1. tell LK to stop splash and to exit.
2. set early_domain_map_attr to 1 to enable stage 1 translation in
   iommu driver.
3. free the memory to system.

Change-Id: If425f044e2c40301eed57375a33a26ec1970abd5
Signed-off-by: Guchun Chen <guchunc@codeaurora.org>

0 files changed, 0 insertions, 0 deletions