Re: [PATCH] drm/amd/amdgpu: hide #warning for missing DC config

[Arnd Bergmann]

On Fri, Jul 12, 2019 at 8:02 PM Alex Deucher <alexdeucher@xxxxxxxxx> wrote:
>
> On Fri, Jul 12, 2019 at 5:41 AM Arnd Bergmann <arnd@xxxxxxxx> wrote:
> >
> > It is annoying to have #warnings that trigger in randconfig
> > builds like
> >
> > drivers/gpu/drm/amd/amdgpu/soc15.c:653:3: error: "Enable CONFIG_DRM_AMD_DC for display support on SOC15."
> > drivers/gpu/drm/amd/amdgpu/nv.c:400:3: error: "Enable CONFIG_DRM_AMD_DC for display support on navi."
> >
> > Remove these and rely on the users to turn these on.
>
> Is there some sort of informational message we could use instead?
> Unless you are a server user, most end users want this option enabled.

I don't think any compile-time output is a good idea here, a 'make -s'
build should really have no output whatsoever (and usually does).

I see that DRM_AMD_DC is already 'default y', which I would hope
to be sufficient. If you want something stronger than that, you could
make hide the option and leave it always-on unless CONFIG_EXPERT
is enabled:

diff --git a/drivers/gpu/drm/amd/display/Kconfig
b/drivers/gpu/drm/amd/display/Kconfig
index 2cfbbf3b85dd..9862a193349a 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -3,7 +3,7 @@ menu "Display Engine Configuration"
        depends on DRM && DRM_AMDGPU

 config DRM_AMD_DC
-       bool "AMD DC - Enable new display engine"
+       bool "AMD DC - Enable new display engine" if EXPERT
        default y
        select SND_HDA_COMPONENT if SND_HDA_CORE
        select DRM_AMD_DC_DCN1_0 if X86 && !(KCOV_INSTRUMENT_ALL &&
KCOV_ENABLE_COMPARISONS) && !CC_IS_CLANG