On 11/19/18 1:59 AM, Pavel Machek wrote:
On Thu 2018-11-01 18:31:30, shuah@xxxxxxxxxx wrote:
From: Shuah Khan <shuah@xxxxxxxxxx>
Media Device Allocator API to allows multiple drivers share a media device.
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.
Sounds like a ... bad idea?
That's what new "media control" framework is for, no?
Why do you need this?
Pavel
Media control framework doesn't address this problem of ownership of the
media device when non-media drivers have to own the pipeline. In this
case, snd-usb owns the audio pipeline when an audio application is using
the device. Without this work, media drivers won't be able to tell if
snd-usb is using the tuner and owns the media pipeline.
I am going to clarify this in the commit log.
thanks,
-- Shuah
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