From: Libin Yang <libin.yang@xxxxxxxxxxxxxxx> The patches are trying to support dynamically binding PCM to pin in HDMI audio. The first patch: When PCM is open when there is no pin (port) bound to the PCM, the driver try to open the PCM successfully. It will try to find an available converter to assign to the PCM. In PCM prepare, if there is no pin bound to the PCM, the driver will do the simple configuration and return true. In PCM close, if there is no pin bound to the PCM, the driver will simply close it. All the pin configuration will be setup in the hotplug which is done in patch 2. As the PCM is dynamically bound to the pin, the pcm_lock is necessary for the whole pcm open/prepare/close process. The second patch: The patch mainly handle the hotplug event. Each time monitor is connected, a proper PCM will be bound to the pin. If the PCM is in use, the pin must be configured. Each time monitor is disconnect, the PCM will be unbound from the pin. The pin will be reset. Libin Yang (2): ALSA: hda - hdmi playback without monitor in dynamic pcm bind mode ALSA: hda - hdmi dynamically bind PCM to pin when monitor hotplug sound/pci/hda/hda_codec.h | 1 + sound/pci/hda/patch_hdmi.c | 354 ++++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 337 insertions(+), 18 deletions(-) -- 1.9.1 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
