• Takashi Iwai's avatar
    drm/i915: Add get_eld audio component · cae666ce
    Takashi Iwai authored
    Implement a new i915_audio_component_ops, get_eld().  It's called by
    the audio driver to fetch the current audio status and ELD of the
    given HDMI/DP port.  It returns the size of expected ELD bytes if it's
    valid, zero if no valid ELD is found, or a negative error code.  The
    current state of audio on/off is stored in the given pointer, too.
    
    Note that the returned size isn't limited to the given max bytes.  If
    the size is greater than the max bytes, it means that only a part of
    ELD has been copied back.
    
    For achieving this implementation, a new field audio_connector is
    added to struct intel_digital_port.  It points to the connector
    assigned to the given digital port.  It's set/reset at each audio
    enable/disable call in intel_audio.c, and protected with av_mutex.
    Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    cae666ce
intel_audio.c 25.5 KB