[PATCH v2 3/4] drm/msm/mdp5: Add START signal to kick off certain pipelines

Some interfaces (WB, DSI Command Mode) need to be kicked off through a START Signal. This signal needs to be sent at the right time and requests in some cases to keep track of the pipeline status (eg: whether pipeline registers are flushed AND output WB buffers are ready, in case of WB interface).

[PATCH v2 3/4] drm/msm/mdp5: Add START signal to kick off certain pipelines

Some interfaces (WB, DSI Command Mode) need to be kicked off through a START Signal. This signal needs to be sent at the right time and requests in some cases to keep track of the pipeline status (eg: whether pipeline registers are flushed AND output WB buffers are ready, in case of WB interface).