]> git.baikalelectronics.ru Git - kernel.git/commit
[media] sound/usb: Use Media Controller API to share media resources
authorShuah Khan <shuahkh@osg.samsung.com>
Wed, 2 Mar 2016 16:50:31 +0000 (13:50 -0300)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Thu, 3 Mar 2016 18:01:13 +0000 (15:01 -0300)
commit113417956cded16cdbdd1c162bf2a7cca07a5dc8
treeaad7f1862beb01250032ac02d46d1dac11ccaa18
parent27f0ea2c47f16e2b87f48706e7e24757962dc4b0
[media] sound/usb: Use Media Controller API to share media resources

Change ALSA driver to use Media Controller API to share media resources
with DVB and V4L2 drivers on a AU0828 media device. 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 <shuahkh@osg.samsung.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
sound/usb/Kconfig
sound/usb/Makefile
sound/usb/card.c
sound/usb/card.h
sound/usb/media.c [new file with mode: 0644]
sound/usb/media.h [new file with mode: 0644]
sound/usb/mixer.h
sound/usb/pcm.c
sound/usb/quirks-table.h
sound/usb/stream.c
sound/usb/usbaudio.h