From: Ricardo Neri Date: Thu, 10 May 2012 02:09:50 +0000 (-0500) Subject: OMAPDSS: HDMI: Implement DSS driver interface for audio X-Git-Tag: v3.5-rc1~7^2~5^2~11^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3a97491f2c54e5239663f8f147b34c280cf7db5;p=pandora-kernel.git 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 --- Reading git-diff-tree failed