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Subject: Re: [PATCH v3] drm/bridge/sii8620: fix dependency on extcon
From:   Randy Dunlap <rdunlap@infradead.org>
To:     Robert Foss <robert.foss@linaro.org>, a.hajda@samsung.com,
        narmstrong@baylibre.com, Laurent.pinchart@ideasonboard.com,
        jonas@kwiboo.se, jernej.skrabec@siol.net, airlied@linux.ie,
        daniel@ffwll.ch, cw00.choi@samsung.com, m.purski@samsung.com,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Masahiro Yamada <masahiroy@kernel.org>
Cc:     kernel test robot <lkp@intel.com>
References: <20210419090124.153560-1-robert.foss@linaro.org>
 <1627725d-1c7e-109f-f995-e761bb022ccc@infradead.org>
Message-ID: <d295f001-575d-f14c-b0c1-1444dd29a03e@infradead.org>
Date:   Mon, 19 Apr 2021 10:54:34 -0700
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On 4/19/21 10:10 AM, Randy Dunlap wrote:
> On 4/19/21 2:01 AM, Robert Foss wrote:
>> The DRM_SIL_SII8620 kconfig has a weak `imply` dependency
>> on EXTCON, which causes issues when sii8620 is built
>> as a builtin and EXTCON is built as a module.
>>
>> The symptoms are 'undefined reference' errors caused
>> by the symbols in EXTCON not being available
>> to the sii8620 driver.
>>
>> Fixes: 688838442147 ("drm/bridge/sii8620: use micro-USB cable detection logic to detect MHL")
>> Signed-off-by: Robert Foss <robert.foss@linaro.org>
>> Reported-by: kernel test robot <lkp@intel.com>
>> ---
>>
>> LKP reported issue:
>> https://lore.kernel.org/lkml/202104040604.SSTe2Cxf-lkp@intel.com/
>>
>>
>> Changes since v1:
>>  - Fix typo on comment
>>
>> Changes since v2:
>>  - Randy: Changed from `depends` to `select` 
> 
> I don't know why my name is on that. I didn't
> suggest any change -- I just reported that v2
> had a problem.
> 
> 
>>
>>
>>  drivers/gpu/drm/bridge/Kconfig | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
>> index 22a467abd3e9..70402da5cc70 100644
>> --- a/drivers/gpu/drm/bridge/Kconfig
>> +++ b/drivers/gpu/drm/bridge/Kconfig
>> @@ -169,7 +169,7 @@ config DRM_SIL_SII8620
>>  	tristate "Silicon Image SII8620 HDMI/MHL bridge"
>>  	depends on OF
>>  	select DRM_KMS_HELPER
>> -	imply EXTCON
>> +	select EXTCON
>>  	depends on RC_CORE || !RC_CORE
>>  	help
>>  	  Silicon Image SII8620 HDMI/MHL bridge chip driver.
> 
> 
> Thanks. Works For Me.
> 
> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

Actually I can upgrade that to:

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>


ta.
-- 
~Randy