[alsa-devel] [PATCH v4 3/3] ALSA: hda: add support for Huawei WMI micmute LED

[Takashi Iwai]

On Sat, 10 Nov 2018 15:26:55 +0100,
Andy Shevchenko wrote:
> 
> On Sat, Nov 10, 2018 at 1:46 AM Ayman Bagabas <ayman.bagabas at gmail.com> wrote:
> >
> > Some of Huawei laptops come with a LED in the micmute key. This patch
> > enables and disable this LED accordingly.
> > This enables micmute LED for:
> > 1. Matebook X (19e5:3200), (19e5:3201)
> > 2. Matebook X Pro (19e5:3204)
> >
> > Signed-off-by: Ayman Bagabas <ayman.bagabas at gmail.com>
> > ---
> >  sound/pci/hda/huawei_wmi_helper.c | 47 +++++++++++++++++++++++++++++++
> >  sound/pci/hda/patch_realtek.c     | 14 ++++++++-
> >  2 files changed, 60 insertions(+), 1 deletion(-)
> >  create mode 100644 sound/pci/hda/huawei_wmi_helper.c
> >
> > diff --git a/sound/pci/hda/huawei_wmi_helper.c b/sound/pci/hda/huawei_wmi_helper.c
> > new file mode 100644
> > index 000000000000..7c91f914ffba
> > --- /dev/null
> > +++ b/sound/pci/hda/huawei_wmi_helper.c
> > @@ -0,0 +1,47 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/* Helper functions for Huawei WMI micmute LED;
> > + * to be included from codec driver
> > + */
> > +
> 
> > +#if IS_ENABLED(CONFIG_HUAWEI_LAPTOP)
> 
> ENABLED or REACHABLE?

FWIW, other similar codes take ENABLED.  It's dynamic binding, and the
codec driver may be re-bound even if it's a built-in.


Takashi