linux-kernel - Re: [PATCH] fbdev: fix frame buffer devices menu

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Date:	Tue, 01 Jun 2010 14:41:18 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Baruch Siach <baruch@...s.co.il>,
	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH] fbdev: fix frame buffer devices menu

Andrew Morton wrote:
> On Thu, 27 May 2010 07:03:29 +0300
> Baruch Siach <baruch@...s.co.il> wrote:
> 
>> On Wed, May 26, 2010 at 02:54:37PM -0300, Thadeu Lima de Souza Cascardo wrote:
>>> Commit f601441916d1e19291d0b4f044b4a7551e2924d0 has inserted the symbol
>>> HAVE_FB_IMX, which does not depend on FB after the menuconfig FB. This
>>> breaks the menu, presenting most of the drivers outside of it, when
>>> using menuconfig.
>>>
>>> Moving the symbol to the start of the file, just like HAVE_FB_ATMEL,
>>> fixes the problem without breaking it for iMX25 configurations (tested
>>> with ARCH=arm, no build).
>>>
>>> Cc: Baruch Siach <baruch@...s.co.il>
>>> Cc: Uwe Kleine-K__nig <u.kleine-koenig@...gutronix.de>
>>> Cc: Sascha Hauer <s.hauer@...gutronix.de>
>>> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
>> Acked-by: Baruch Siach <baruch@...s.co.il>
>>
> 
> OK, I've been sitting on the below patch
> (fbdev-fix-kconfig-breakage-in-drivers-video.patch) for months, waiting
> for Krzysztof to respond to some comment which Baruch made, but
> Krzysztof seems to have gone quiet.
> 
> Could you guys please compare Thadeu's patch with the below and work
> out which is preferable and whether the new patch has the same coverage
> as the old one, etc?
> 
> Thanks.
> 
> 
> 
> From: Krzysztof Helt <krzysztof.h1@...pl>
> 
> There are two new options inside the CONFIG_FB section which do not depend
> on the CONFIG_FB.  This break Kconfig menu layout.
> 
> Fix it and reduce few conditions for sparc frame buffers as the FB_SBUS ==
> ((FB = y) && SPARC).
> 
> Signed-off-by: Krzysztof Helt <krzysztof.h1@...pl>
> Acked-by: David S. Miller <davem@...emloft.net>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> ---
> 
>  drivers/video/Kconfig |   11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)

This patch is missing a compatible change to
arch/arm/plat-mxc/Kconfig:

config ARCH_MX25
	bool "MX25-based"
	select CPU_ARM926T
	select ARCH_MXC_IOMUX_V3
	select HAVE_FB_IMX
	help
	  This enables support for systems based on the Freescale i.MX25 family

so the "select HAVE_FB_IMX" does nothing and there is no handling for this config
below AFAICT.


> diff -puN drivers/video/Kconfig~fbdev-fix-kconfig-breakage-in-drivers-video drivers/video/Kconfig
> --- a/drivers/video/Kconfig~fbdev-fix-kconfig-breakage-in-drivers-video
> +++ a/drivers/video/Kconfig
> @@ -400,12 +400,9 @@ config FB_SA1100
>  	  If you plan to use the LCD display with your SA-1100 system, say
>  	  Y here.
>  
> -config HAVE_FB_IMX
> -	bool
> -
>  config FB_IMX
>  	tristate "Motorola i.MX LCD support"
> -	depends on FB && (HAVE_FB_IMX || ARCH_MX1 || ARCH_MX2)
> +	depends on FB && (ARCH_MX1 || ARCH_MX2)
>  	select FB_CFB_FILLRECT
>  	select FB_CFB_COPYAREA
>  	select FB_CFB_IMAGEBLIT
> @@ -802,7 +799,7 @@ config FB_SBUS
>  
>  config FB_BW2
>  	bool "BWtwo support"
> -	depends on (FB = y) && (SPARC && FB_SBUS)
> +	depends on FB_SBUS
>  	select FB_CFB_FILLRECT
>  	select FB_CFB_COPYAREA
>  	select FB_CFB_IMAGEBLIT
> @@ -811,7 +808,7 @@ config FB_BW2
>  
>  config FB_CG3
>  	bool "CGthree support"
> -	depends on (FB = y) && (SPARC && FB_SBUS)
> +	depends on FB_SBUS
>  	select FB_CFB_FILLRECT
>  	select FB_CFB_COPYAREA
>  	select FB_CFB_IMAGEBLIT
> @@ -820,7 +817,7 @@ config FB_CG3
>  
>  config FB_CG6
>  	bool "CGsix (GX,TurboGX) support"
> -	depends on (FB = y) && (SPARC && FB_SBUS)
> +	depends on FB_SBUS
>  	select FB_CFB_COPYAREA
>  	select FB_CFB_IMAGEBLIT
>  	help
> _


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