Re: [PATCH v3] drm/display: Drop obsolete dependency on COMPILE_TEST

[Doug Anderson]

Hi,

On Tue, Oct 15, 2024 at 4:46 AM Jean Delvare <jdelvare@xxxxxxx> wrote:
>
> Since commit 0166dc11be91 ("of: make CONFIG_OF user selectable"), it
> is possible to test-build any driver which depends on OF on any
> architecture by explicitly selecting OF. Therefore depending on
> COMPILE_TEST as an alternative is no longer needed.
>
> To avoid reintroducing the randconfig bug originally fixed by commit
> 876271118aa4 ("drm/display: Fix build error without CONFIG_OF"),
> DRM_MSM which selects DRM_DISPLAY_DP_HELPER must explicitly depend
> on OF. This is consistent with what all other DRM drivers are doing.
>
> Signed-off-by: Jean Delvare <jdelvare@xxxxxxx>
> Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> ---
> For regular builds, this is a no-op, as OF is always enabled on
> ARCH_QCOM and SOC_IMX5. So this change only affects test builds. As
> explained before, allowing test builds only when OF is enabled
> improves the quality of these test builds, as the result is then
> closer to how the code is built on its intended targets.
>
> Changes in v3:
> * Rebase on top of kernel v6.11.
> Changes in v2:
> * Let DRM_MSM depend on OF so that random test builds won't break.
>
>  drivers/gpu/drm/display/Kconfig |    2 +-
>  drivers/gpu/drm/msm/Kconfig     |    1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
>
> --- linux-6.11.orig/drivers/gpu/drm/display/Kconfig
> +++ linux-6.11/drivers/gpu/drm/display/Kconfig
> @@ -3,7 +3,7 @@
>  config DRM_DISPLAY_DP_AUX_BUS
>         tristate
>         depends on DRM
> -       depends on OF || COMPILE_TEST
> +       depends on OF
>
>  config DRM_DISPLAY_HELPER
>         tristate
> --- linux-6.11.orig/drivers/gpu/drm/msm/Kconfig
> +++ linux-6.11/drivers/gpu/drm/msm/Kconfig
> @@ -6,6 +6,7 @@ config DRM_MSM
>         depends on ARCH_QCOM || SOC_IMX5 || COMPILE_TEST
>         depends on COMMON_CLK
>         depends on IOMMU_SUPPORT
> +       depends on OF

Perhaps nobody landed this because you're missing the msm maintainers
as specified by `./scripts/get_maintainer.pl -f
drivers/gpu/drm/msm/Kconfig` ? I've added them here. It seems like
we'd at least need an Ack by those guys since this modified the
msm/Kconfig...

FWIW I haven't spent massive time studying this, but what you have
here looks reasonable. I'm happy at least with this from a DP AUX bus
perspective:

Acked-by: Douglas Anderson <dianders@xxxxxxxxxxxx>

Presumably landing this via drm-misc makes the most sense after MSM
guys give it an Ack.


-Doug