On 1/11/19 3:57 PM, shuah wrote: > On 12/19/18 6:51 AM, Takashi Iwai wrote: >> On Tue, 18 Dec 2018 18:59:39 +0100, >> shuah@xxxxxxxxxx wrote: >>> >>> From: Shuah Khan <shuah@xxxxxxxxxx> >>> >>> Media Device Allocator API to allows multiple drivers share a media device. >>> This API solves a very common use-case for media devices where one physical >>> device (an USB stick) provides both audio and video. When such media device >>> exposes a standard USB Audio class, a proprietary Video class, two or more >>> independent drivers will share a single physical USB bridge. In such cases, >>> it is necessary to coordinate access to the shared resource. >>> >>> Using this API, drivers can allocate a media device with the shared struct >>> device as the key. Once the media device is allocated by a driver, other >>> drivers can get a reference to it. The media device is released when all >>> the references are released. >>> >>> Change the ALSA driver to use the Media Controller API to share media >>> resources with DVB, and V4L2 drivers on a AU0828 media device. >>> >>> The Media Controller specific initialization is done after sound card is >>> registered. ALSA creates Media interface and entity function graph nodes >>> for Control, Mixer, PCM Playback, and PCM Capture devices. >>> >>> snd_usb_hw_params() will call Media Controller enable source handler >>> interface to request the media resource. If resource request is granted, >>> it will release it from snd_usb_hw_free(). If resource is busy, -EBUSY is >>> returned. >>> >>> Media specific cleanup is done in usb_audio_disconnect(). >>> >>> Signed-off-by: Shuah Khan <shuah@xxxxxxxxxx> >> >> Feel free to take my ack regarding the sound stuff: >> Reviewed-by: Takashi Iwai <tiwai@xxxxxxx> >> >> >> Thanks! >> >> Takashi >> > > Hi Mauro, > > Any update on this patch series? I'm planning to process this series for 5.1. Haven't gotten around to it yet, but I expect to do this next week. Still going through all the pending patches after the Christmas period :-) Regards, Hans
