Messages in this thread | | | From | Jani Nikula <> | Subject | Re: [PATCH next] drm/i915: fix build error without ACPI | Date | Mon, 13 Jan 2020 15:57:10 +0200 |
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On Mon, 13 Jan 2020, Chen Zhou <chenzhou10@huawei.com> wrote: > If CONFIG_ACPI=n and CONFIG_BACKLIGHT_CLASS_DEVICE=m, compilation complains > with undefined references: > > drivers/gpu/drm/i915/display/intel_panel.o: In function `intel_backlight_device_register': > intel_panel.c:(.text+0x4dd9): undefined reference to `backlight_device_register' > drivers/gpu/drm/i915/display/intel_panel.o: In function `intel_backlight_device_unregister': > intel_panel.c:(.text+0x4e96): undefined reference to `backlight_device_unregister' > > This patch select BACKLIGHT_CLASS_DEVICE directly.
i915 does not unconditionally require backlight.
See e.g. [1] for the details.
BR, Jani.
[1] http://lore.kernel.org/r/87o8veotf9.fsf@intel.com
> > Reported-by: Hulk Robot <hulkci@huawei.com> > Signed-off-by: Chen Zhou <chenzhou10@huawei.com> > --- > drivers/gpu/drm/i915/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig > index ba95959..6b69dab 100644 > --- a/drivers/gpu/drm/i915/Kconfig > +++ b/drivers/gpu/drm/i915/Kconfig > @@ -16,7 +16,7 @@ config DRM_I915 > select IRQ_WORK > # i915 depends on ACPI_VIDEO when ACPI is enabled > # but for select to work, need to select ACPI_VIDEO's dependencies, ick > - select BACKLIGHT_CLASS_DEVICE if ACPI > + select BACKLIGHT_CLASS_DEVICE > select INPUT if ACPI > select ACPI_VIDEO if ACPI > select ACPI_BUTTON if ACPI
-- Jani Nikula, Intel Open Source Graphics Center
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