linux-kernel - Re: [PATCH v9 3/4] ASoC: tda998x: add a codec to the HDMI transmitter

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Message-ID: <20150107190241.27ebac8b@armhf>
Date:	Wed, 7 Jan 2015 19:02:41 +0100
From:	Jean-Francois Moine <moinejf@...e.fr>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Andrew Jackson <Andrew.Jackson@....com>,
	Mark Brown <broonie@...nel.org>,
	Dave Airlie <airlied@...il.com>, Jyri Sarha <jsarha@...com>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 3/4] ASoC: tda998x: add a codec to the HDMI
 transmitter

On Wed, 7 Jan 2015 15:41:38 +0000
Russell King - ARM Linux <linux@....linux.org.uk> wrote:

> On Wed, Jan 07, 2015 at 03:10:47PM +0000, Andrew Jackson wrote:
> > On 01/07/15 10:51, Jean-Francois Moine wrote:
> > > diff --git a/drivers/gpu/drm/i2c/Kconfig b/drivers/gpu/drm/i2c/Kconfig
> > > index 22c7ed6..24fc975 100644
> > > --- a/drivers/gpu/drm/i2c/Kconfig
> > > +++ b/drivers/gpu/drm/i2c/Kconfig
> > > @@ -28,6 +28,7 @@ config DRM_I2C_SIL164
> > >  config DRM_I2C_NXP_TDA998X
> > >         tristate "NXP Semiconductors TDA998X HDMI encoder"
> > >         default m if DRM_TILCDC
> > > +       select SND_SOC_TDA998X
> > 
> > Do you need this since sound/soc/codecs/Kconfig conditionally brings in the
> > CODEC driver?

For SND_SOC_ALL_CODECS only.

> More importantly, it's broken, because it'll cause Kconfig to complain
> if you enable DRM_I2C_NXP_TDA998X, but have ASoC disabled.
> 
> Moreover, if you decide you want the sound and ASoC built as a module,
> but want to build in DRM and TDA998x support (so you can get video
> output working on boot before initramfs/rootfs), Kconfig may well
> complain.

	select SND_SOC_TDA998X if SND_SOC

should work in all cases.

> > > +static int __init tda998x_codec_init(void)
> > > +{
> > > +       return 0;
> > > +}
> > > +static void __exit tda998x_codec_exit(void)
> > > +{
> > > +}
> > > +module_init(tda998x_codec_init);
> > > +module_exit(tda998x_codec_exit);
> 
> There's no need for these if they remain as the above.  Modules can have
> both init/exit functions, or neither, and they are still unloadable.
> Only modules which provide only an init function get locked in on load.

Thanks.

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/
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