On Wed, 18 Nov 2015 09:46:57 +0100, libin.yang@xxxxxxxxxxxxxxx wrote: > > 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. Such a detailed explanation should be put into the patch itself, not in the cover letter. The current description is way too sparse. Takashi > 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
