linux-kernel - Re: [PATCH] drm: tegra: add CONFIG

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Date:   Tue, 25 Jul 2017 13:53:59 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Stephen Boyd <stephen.boyd@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        "open list:TEGRA ARCHITECTURE SUPPORT" <linux-tegra@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm: tegra: add CONFIG_OF dependency

On Tue, Jul 25, 2017 at 10:25 AM, Jon Hunter <jonathanh@...dia.com> wrote:
>
> On 21/07/17 17:13, Arnd Bergmann wrote:
>> Without CONFIG_OF, we can run into a build error:
>>
>> drivers/gpu/drm/tegra/dpaux.c:378:20: error: 'pinconf_generic_dt_node_to_map_group' undeclared here (not in a function); did you mean 'pinconf_generic_params'?
>>   .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
>>                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>                     pinconf_generic_params
>> drivers/gpu/drm/tegra/dpaux.c:379:17: error: 'pinconf_generic_dt_free_map' undeclared here (not in a function); did you mean 'pinconf_generic_params'?
>>
>> This adds an explicit dependency.
>>
>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>> ---
>>  drivers/gpu/drm/tegra/Kconfig | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig
>> index 2db29d67193d..dc58ab140151 100644
>> --- a/drivers/gpu/drm/tegra/Kconfig
>> +++ b/drivers/gpu/drm/tegra/Kconfig
>> @@ -3,6 +3,7 @@ config DRM_TEGRA
>>       depends on ARCH_TEGRA || (ARM && COMPILE_TEST)
>>       depends on COMMON_CLK
>>       depends on DRM
>> +     depends on OF
>>       select DRM_KMS_HELPER
>>       select DRM_MIPI_DSI
>>       select DRM_PANEL
>
> Thanks Arnd. I am curious if it can still fail if PINCTRL is not
> selected in whatever config you are using?

I have not run into other those problems in many randconfig builds.
Looking at the driver now, I see it has an "#ifdef CONFIG_GENERIC_PINCONF"
to handle that case.

        Arnd