Re: [PATCH] drm/etnaviv: add thermal dependency

Eduardo Valentin
2017-04-23T15:37:15Z

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On Wed, Apr 19, 2017 at 08:11:16PM +0200, Arnd Bergmann wrote:
> When CONFIG_THERMAL is enabled as a loadable module, and etnaviv is
> built-in, we get a link error:
>
> drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_bind':
> etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0x34): undefined reference to `thermal_of_cooling_device_register'
> etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0xe0): undefined reference to `thermal_cooling_device_unregister'
> drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_unbind':
> etnaviv_gpu.c:(.text.etnaviv_gpu_unbind+0xf0): undefined reference to `thermal_cooling_device_unregister'
>
> This adds a Kconfig dependency to prevent etnaviv from being built-in
> with CONFIG_THERMAL=m, while still allowing the valid configurations.
> Unfortunately, simply adding the dependency here breaks Kconfig through
> a dependency loop involving lots of symbols all the way until ACPI_VIDEO,
> which is the only video driver that explicitly selects 'THERMAL'. Turning
> this into a 'depends on' addresses the problem.
> For completeness, I'm also removing the redundant 'select THERMAL'
> from INTEL_MENLOW, so no other driver uses that statement.
>
> Fixes: bcdfb5e56dc5 ("drm/etnaviv: add etnaviv cooling device")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Eduardo Valentin <edubezval@gmail.com>

> ---
> drivers/acpi/Kconfig | 2 +-
> drivers/gpu/drm/etnaviv/Kconfig | 1 +
> drivers/platform/x86/Kconfig | 1 -
> 3 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 03cc4e74096b..252399efa8b3 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -184,7 +184,7 @@ config ACPI_VIDEO
> tristate "Video"
> depends on X86 && BACKLIGHT_CLASS_DEVICE
> depends on INPUT
> - select THERMAL
> + depends on THERMAL
> help
> This driver implements the ACPI Extensions For Display Adapters
> for integrated graphics devices on motherboard, as specified in
> diff --git a/drivers/gpu/drm/etnaviv/Kconfig b/drivers/gpu/drm/etnaviv/Kconfig
> index 71cee4e9fefb..1d6c744e7924 100644
> --- a/drivers/gpu/drm/etnaviv/Kconfig
> +++ b/drivers/gpu/drm/etnaviv/Kconfig
> @@ -3,6 +3,7 @@ config DRM_ETNAVIV
> tristate "ETNAVIV (DRM support for Vivante GPU IP cores)"
> depends on DRM
> depends on ARCH_MXC || ARCH_DOVE || (ARM && COMPILE_TEST)
> + depends on THERMAL || THERMAL=n
> depends on MMU
> select SHMEM
> select SYNC_FILE
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index e229ea317b9c..76ced87efde5 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -544,7 +544,6 @@ config SENSORS_HDAPS
> config INTEL_MENLOW
> tristate "Thermal Management driver for Intel menlow platform"
> depends on ACPI_THERMAL
> - select THERMAL
> ---help---
> ACPI thermal management enhancement driver on
> Intel Menlow platform.
> --
> 2.9.0
>

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