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

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

[Jean Delvare]

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@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
---
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
 	depends on QCOM_AOSS_QMP || QCOM_AOSS_QMP=n
 	depends on QCOM_OCMEM || QCOM_OCMEM=n
 	depends on QCOM_LLCC || QCOM_LLCC=n


-- 
Jean Delvare
SUSE L3 Support

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@suse.de> 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@suse.de>
> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
> Cc: David Airlie <airlied@gmail.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> ---
> 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@chromium.org>

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


-Doug

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

[Dmitry Baryshkov]

On Tue, Oct 15, 2024 at 09:06:04AM -0700, Doug Anderson wrote:
> Hi,
> 
> On Tue, Oct 15, 2024 at 4:46 AM Jean Delvare <jdelvare@suse.de> 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@suse.de>
> > Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
> > Cc: David Airlie <airlied@gmail.com>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > ---
> > 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@chromium.org>
> 
> Presumably landing this via drm-misc makes the most sense after MSM
> guys give it an Ack.

Acked-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

-- 
With best wishes
Dmitry

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

[Jean Delvare]

Hi Doug,

On Tue, 15 Oct 2024 09:06:04 -0700, Doug Anderson wrote:
> On Tue, Oct 15, 2024 at 4:46 AM Jean Delvare <jdelvare@suse.de> 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@suse.de>
> > Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
> > Cc: David Airlie <airlied@gmail.com>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > ---
> > 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...

You are right. The fix originally only touched
drivers/gpu/drm/display/Kconfig and I forgot to update the maintainers
list for v2 when drivers/gpu/drm/msm/Kconfig had to be modified as
well. Thank you for noticing and getting the right people involved,
this clearly made a difference :-)

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

Thanks,
-- 
Jean Delvare
SUSE L3 Support

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

[Abhinav Kumar]

On 10/15/2024 4:46 AM, Jean Delvare 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@suse.de>
> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
> Cc: David Airlie <airlied@gmail.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> ---
> 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(-)
> 

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>

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

[Dmitry Baryshkov]

On Tue, 15 Oct 2024 13:46:06 +0200, Jean Delvare 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.
> 
> [...]

Applied to drm-misc-next, thanks!

[1/1] drm/display: Drop obsolete dependency on COMPILE_TEST
      commit: 2063ca42486bc07b49bc145b5dfcb421f4deebaf

Best regards,
-- 
With best wishes
Dmitry