drm/msm/sde: add api for determining current interface mode

Provide an encoder API for querying the currently active INTF
mode (e.g., command/video) that may be used in the rest of
the DRM driver.

Change-Id: I14d93fa0c1cb6282d941e3284ae6ebe6de5f6772
Signed-off-by: Clarence Ip <cip@codeaurora.org>
6 files changed