On Fri, Dec 15, 2017 at 01:51:52PM +0100, Arnd Bergmann wrote:
> The newly introduced driver has optional suspend/resume functions,
> causing a warning when CONFIG_PM is disabled:
>
> drivers/gpu/drm/tegra/hub.c:749:12: error: 'tegra_display_hub_resume' defined
> but not used [-Werror=unused-function]
> drivers/gpu/drm/tegra/hub.c:733:12: error: 'tegra_display_hub_suspend'
> defined but not used [-Werror=unused-function]
>
> This marks them __maybe_unused to shut up the warnings.
>
> Fixes: c4755fb9064f ("drm/tegra: Add Tegra186 display hub support")
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
> drivers/gpu/drm/tegra/hub.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)We had touched on this topic in a different thread. The Tegra DRM driver currently relies on runtime PM to work properly. I don't see a reason to not make that official by adding a select PM to menuconfig ARCH_TEGRA on 32-bit ARM just like we already do on 64-bit ARM. I've gone and applied this patch as an interim solution. Once we've made the switch to select PM on all generations of Tegra we can remove all the #ifdef and __maybe_unused. Thanks, Thierry
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