linux-kernel - Re: linux-next: Tree for Jun 15 (drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu

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Date:   Wed, 15 Jun 2022 12:44:30 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: linux-next: Tree for Jun 15
 (drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c)



On 6/15/22 12:28, Alex Deucher wrote:
> On Wed, Jun 15, 2022 at 3:01 PM Randy Dunlap <rdunlap@...radead.org> wrote:
>>
>>
>>
>> On 6/14/22 23:01, Stephen Rothwell wrote:
>>> Hi all,
>>>
>>> Changes since 20220614:
>>>
>>
>> on i386:
>> # CONFIG_DEBUG_FS is not set
>>
>>
>> ../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function ‘amdgpu_dm_crtc_late_register’:
>> ../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:6599:2: error: implicit declaration of function ‘crtc_debugfs_init’; did you mean ‘amdgpu_debugfs_init’? [-Werror=implicit-function-declaration]
>>   crtc_debugfs_init(crtc);
>>   ^~~~~~~~~~~~~~~~~
>>   amdgpu_debugfs_init
>>
>>
>> Full randconfig file is attached.
> 
> I tried building with your config and I can't repro this.  As Harry
> noted, that function and the whole secure display feature depend on
> debugfs.  It should never be built without CONFIG_DEBUG_FS.  See
> drivers/gpu/drm/amd/display/Kconfig:

Did you try building with today's linux-next tree?
(whatever is in it)

I have seen this build error multiple times so it shouldn't
be so difficult to repro it.


>> config DRM_AMD_SECURE_DISPLAY
>>         bool "Enable secure display support"
>>         default n
>>         depends on DEBUG_FS
>>         depends on DRM_AMD_DC_DCN
>>         help
>>             Choose this option if you want to
>>             support secure display
>>
>>             This option enables the calculation
>>             of crc of specific region via debugfs.
>>             Cooperate with specific DMCU FW.
> 
> amdgpu_dm_crtc_late_register is guarded by
> CONIG_DRM_AMD_SECURE_DISPLAY.  It's not clear to me how we could hit
> this.


-- 
~Randy