Commits
Ricardo Neri committed f3a97491f2c
OMAPDSS: HDMI: Implement DSS driver interface for audio Implement the DSS device driver audio support interface in the HDMI panel driver and generic driver. The implementation relies on the IP-specific functions that are defined at DSS probe time. A mixed locking strategy is used. The panel's mutex is used when the state of the panel is queried as required by the audio functions. The audio state is protected using a spinlock as users of DSS HDMI audio functionality might start/stop audio while holding a spinlock. The mutex and the spinlock are held and released as needed by each individual function to protect the panel state and the audio state. Although the panel's audio_start functions does not check whether the panel is active, the audio _ENABLED state can be reached only from audio_enable, which does check the state of the panel. Also, if the panel is ever disabled, the audio state will transition to _DISABLED. Transitions are always protected by the audio lock. Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>