linux-kernel - Re: [PATCH 1/2] config: omap2+: force fb and dss support as built-in

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Date:	Tue, 21 Jun 2011 10:30:16 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	Tomi Valkeinen <tomi.valkeinen@...com>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-fbdev@...r.kernel.org, linux-omap@...r.kernel.org,
	linux@....linux.org.uk, tony@...mide.com, lethal@...ux-sh.org,
	linaro-dev@...ts.linaro.org, patches@...aro.org,
	Samreen <samreen@...com>
Subject: Re: [PATCH 1/2] config: omap2+: force fb and dss support as built-in

On Monday 20 June 2011 06:34 PM, Tomi Valkeinen wrote:
> On Mon, 2011-06-20 at 16:16 +0530, Tushar Behera wrote:
>> In certain board files, there are references to vram related functions
>> which are defined in drivers/video/omap2/vram.c. Because of this direct
>> dependency, CONFIG_FB_OMAP2 should be a built-in feature.
>
> arch/arm/plat-omap/include/plat/vram.h defines dummy inline function in
> case vram.c is not compiled in, so the board files should compile fine.
>
>> As per the current architecture, CONFIG_FB_OMAP2 is dependent on
>> CONFIG_OMAP2_DSS. Hence CONFIG_OMAP2_DSS support should also be selected
>> by default.
>
> The configuration is fine as it is. And anyway, if things do not compile
> when something is configured as a module, the correct fix is hardly just
> changing the feature to be compiled built-in =).
Agreed. :)
I am not an expert in DSS. I just wanted to raise my concern.
>
>> Cc: Tony Lindgren<tony@...mide.com>
>> Cc: Samreen<samreen@...com>
>> Signed-off-by: Tushar Behera<tushar.behera@...aro.org>
>> ---
>> arch/arm/mach-omap2/built-in.o: In function `rx51_video_mem_init':
>> linux-linaro-2.6.39/arch/arm/mach-omap2/board-rx51-video.c:97: undefined reference to `omap_vram_set_sdram_vram'
>> arch/arm/plat-omap/built-in.o: In function `omap_reserve':
>> linux-linaro-2.6.39/arch/arm/plat-omap/common.c:66: undefined reference to `omap_vram_reserve_sdram_memblock'
>> arch/arm/plat-omap/built-in.o: In function `omap_detect_sram':
>> linux-linaro-2.6.39/arch/arm/plat-omap/sram.c:179: undefined reference to `omap_vram_reserve_sram'
>> make[1]: *** [.tmp_vmlinux1] Error 1
>> make: *** [sub-make] Error 2
>
> Compiles fine for me. Perhaps you are using some old kernel?
As mentioned in the cover letter, we get this error only if 2/2 is 
applied and 1/2 is not applied.

I tested this by applying 2/2 on v3.0-rc4 and using omap2plus_defconfig.
>
>   Tomi
>
>


-- 
Tushar Behera
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