linux-kernel - Re: [PATCH 15/15] staging/omapdrm: don't build on multiplatform

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Message-ID: <50FD7B17.3080207@ti.com>
Date:	Mon, 21 Jan 2013 11:29:59 -0600
From:	Rob Clark <rob@...com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <arm@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 15/15] staging/omapdrm: don't build on multiplatform

On 01/21/2013 11:26 AM, Rob Clark wrote:
> On 01/21/2013 11:16 AM, Arnd Bergmann wrote:
>> The omapdrm driver is incorrectly flagged to allow building
>> on non-omap platforms, when ARCH_MULTIPLATFORM is set.
>>
>> This does not work, because it unconditionally selects
>> the OMAP2_DSS symbol that only works on OMAP.
>> The problem was introduced in 5e3b087499 "staging:
>> drm/omap: add support for ARCH_MULTIPLATFORM", which this
>> patch partly reverts.
>
> Are you sure OMAP2_DSS requires ARCH_OMAP2PLUS?  I don't see this, and 
> it at least used to not depend on ARCH_OMAP2PLUS.  If it does now, I 
> think the correct fix would be to remove the dependency in OMAP2_DSS.  
> I don't think removing ARCH_MULTIPLATFORM support in omapdrm is the 
> correct solution.

hmm, yes, it does appear that OMAP2_DSS depends on ARCH_OMAP2PLUS.. let 
me have a quick look at this, fixing omapdss would be a better solution..

BR,
-R

>
>
>> Without this patch, building allyesconfig results in:
>>
>> warning: (VIDEO_OMAP2_VOUT && DRM_OMAP) selects OMAP2_DSS which has 
>> unmet direct dependencies (HAS_IOMEM && ARCH_OMAP2PLUS)
>> warning: (VIDEO_OMAP2_VOUT && DRM_OMAP) selects OMAP2_DSS which has 
>> unmet direct dependencies (HAS_IOMEM && ARCH_OMAP2PLUS)
>> drivers/video/omap2/dss/dss.c: In function 'dss_calc_clock_div':
>> drivers/video/omap2/dss/dss.c:572:20: error: 
>> 'CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK' undeclared (first use in this 
>> function)
>> drivers/video/omap2/dss/dss.c:572:20: note: each undeclared 
>> identifier is reported only once for each function it appears in
>> drivers/staging/omapdrm/omap_connector.c: In function 
>> 'omap_connector_dpms':
>> drivers/staging/omapdrm/omap_connector.c:116:8: error: 
>> 'OMAP_DSS_DISPLAY_SUSPENDED' undeclared (first use in this function)
>> drivers/staging/omapdrm/omap_connector.c:116:8: note: each undeclared 
>> identifier is reported only once for each function it appears in
>
>
> This was an unrelated build break which should be fixed in latest 
> master after 'staging: drm/omap: use omapdss low level API'
>
> BR,
> -R
>
>>
>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>> Cc: Rob Clark <rob@...com>
>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> ---
>>   drivers/staging/omapdrm/Kconfig |    2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/omapdrm/Kconfig 
>> b/drivers/staging/omapdrm/Kconfig
>> index b724a41..81a7cba 100644
>> --- a/drivers/staging/omapdrm/Kconfig
>> +++ b/drivers/staging/omapdrm/Kconfig
>> @@ -2,7 +2,7 @@
>>   config DRM_OMAP
>>       tristate "OMAP DRM"
>>       depends on DRM && !CONFIG_FB_OMAP2
>> -    depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM
>> +    depends on ARCH_OMAP2PLUS
>>       select DRM_KMS_HELPER
>>       select OMAP2_DSS
>>       select FB_SYS_FILLRECT
>

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