drm/msm/dsi-staging: add lp1/lp2 command support

Add support for DSI panel-specific "LP1" and "LP2" command
strings. These are optional commands that request DSI
panels to enter low power (LP1) and very low power (LP2)
display modes.

CRs-Fixed: 2073016
Change-Id: I20c6796acca465359838377d72d631ae7eb0aa53
Signed-off-by: Clarence Ip <cip@codeaurora.org>
5 files changed