Re: [RFC PATCH v8 4/4] sound/usb: Use Media Controller API to share media resources

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Hi Hans,

On 11/20/18 4:54 AM, Hans Verkuil wrote:
On 11/02/2018 01:31 AM, shuah@xxxxxxxxxx wrote:
From: Shuah Khan <shuah@xxxxxxxxxx>

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 <shuah@xxxxxxxxxx>

Thanks for the review. Fixing them all in the next revision.

-- Shuah




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