[alsa-devel] [PATCH 3/3] ASoC: AMD: add AMD ASoC ACP-I2S driver [v4]

[Mark Brown]

On Thu, Aug 20, 2015 at 07:50:34PM -0400, Alex Deucher wrote:
> On Thu, Aug 20, 2015 at 7:45 PM, Mark Brown <broonie at kernel.org> wrote:

> > This is not a DRM driver, it is an ASoC driver, and like I say DRM is a
> > bit special.  I do note that AMD has contributed at least its CCP and
> > cpufreq drivers (indeed all their non-DRM code I could find with
> > explicit license statements) under a normal kernel license.  As far as I
> > can tell this licensing is entirely confined to the DRM drivers.

> > I am not readily able to convince myself that this is compatible with
> > the intent of exporting the ASoC APIs _GPL(), this looks like it can be
> > used as the basis for a shim layer for non-GPL code (the licensing
> > strategy seems very similar).  I'd need to think through this carefully.

> If you have strong concerns, I can double check with our lawyers and
> see about changing it, I'm just not sure how long that will take :(

I at the very least need to think about this, it's really important to
me that we don't want to see proprietary drivers.

> The licensing tends to vary based on the teams involved.  The ACP
> audio and i2s was developed by the GPU teams and we've mostly worked
> on drm and Xorg stuff until now.

For reference the GPL code in the kernel includes at least:

  drivers/crypto/ccp/ccp-crypto-*.c
  drivers/cpufreq/powernow-k8.c
  drivers/pinctrl/pinctrl-amd.c

and there's direct contributions from AMD there AFAICT, not just outside
developers contributing support for AMD chips.
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