linux-kernel - Re: [patch, -git] media/video/sound build fix, TEA5761/TEA5767

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Date:	Wed, 30 Apr 2008 14:04:52 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-dvb-maintainer@...uxtv.org, video4linux-list@...hat.com,
	linux-kernel@...r.kernel.org, Mike Galbraith <efault@....de>
Subject: Re: [patch, -git] media/video/sound build fix, TEA5761/TEA5767

At Wed, 30 Apr 2008 13:13:37 +0200,
Ingo Molnar wrote:
> 
> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > x86.git randconfig testing found the following new build error in 
> > latest -git:
> 
> updated fix below - another randconfig also pointed it out that there's 
> an I2C dependency. (I cannot possibly do a full analysis of the 
> dependencies of this code so i keep fixing up dependencies as they 
> occur.)
> 
> 	Ingo
> 
> --------------------->
> Subject: media/video/sound build fix, TEA5761/TEA5767
> From: Ingo Molnar <mingo@...e.hu>
> Date: Wed Apr 30 12:44:02 CEST 2008
> 
> x86.git randconfig testing found the following build error:
> 
> drivers/built-in.o: In function `v4l2_i2c_drv_attach_legacy':
> tuner-core.c:(.text+0x1a829d): undefined reference to `v4l2_i2c_attach'
> drivers/built-in.o: In function `tuner_command':
> tuner-core.c:(.text+0x1a971c): undefined reference to `v4l_printk_ioctl'
> 
> the reason is that the TEA5761/TEA5767 tuner code is dependent on
> (legacy?) V4L infrastructure like v4l2_i2c_attach, by virtue of
> drivers/media/video/tuner-core.c including media/v4l2-i2c-drv-legacy.h
> and ./sound/i2c/other/Makefile doing:
> 
>   snd-tea575x-tuner-objs := tea575x-tuner.o
> 
> for now i solved this via adding a VIDEO_V4L2_COMMON dependency
> to MEDIA_TUNER - but i suspect there might be a better fix as well.
> 
> Signed-off-by: Ingo Molnar <mingo@...e.hu>

I guess this patch is also unnecessary if the reverse selection from
fm801-tea575x is replaced with depend by my patch.  Then
VIDEO_V4L2_COMMON and I2C have to be turned on as the dependency of
VIDEO_V4L1.


thanks,

Takashi

> ---
>  drivers/media/common/tuners/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux/drivers/media/common/tuners/Kconfig
> ===================================================================
> --- linux.orig/drivers/media/common/tuners/Kconfig
> +++ linux/drivers/media/common/tuners/Kconfig
> @@ -20,7 +20,7 @@ config MEDIA_ATTACH
>  config MEDIA_TUNER
>  	tristate
>  	default DVB_CORE || VIDEO_DEV
> -	depends on DVB_CORE || VIDEO_DEV
> +	depends on (DVB_CORE || VIDEO_DEV) && VIDEO_V4L2_COMMON && I2C
>  	select MEDIA_TUNER_XC2028 if !MEDIA_TUNER_CUSTOMIZE
>  	select MEDIA_TUNER_XC5000 if !MEDIA_TUNER_CUSTOMIZE
>  	select MEDIA_TUNER_MT20XX if !MEDIA_TUNER_CUSTOMIZE
> --
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