panthor_device_resume/suspend() are only compiled when CONFIG_PM is enabled but panthro_drv.c doesn't use the pm_ptr() macro to conditionally discard resume/suspend assignments, which causes undefined symbol errors at link time when !PM.
We could fix that by using pm_ptr(), but supporting the !PM case makes little sense (the whole point of these embedded GPUs is to be low power, so proper PM is a basic requirement in that case). So let's just enforce the presence of CONFIG_PM with a Kconfig dependency instead. If someone needs to relax this dependency, it can be done in a follow-up. Reported-by: kernel test robot <l...@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202403031944.eoimq8wk-...@intel.com/ Signed-off-by: Boris Brezillon <boris.brezil...@collabora.com> --- drivers/gpu/drm/panthor/Kconfig | 1 + drivers/gpu/drm/panthor/panthor_device.c | 2 -- 2 files changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/panthor/Kconfig b/drivers/gpu/drm/panthor/Kconfig index 55b40ad07f3b..fdce7c1b2310 100644 --- a/drivers/gpu/drm/panthor/Kconfig +++ b/drivers/gpu/drm/panthor/Kconfig @@ -6,6 +6,7 @@ config DRM_PANTHOR depends on ARM || ARM64 || COMPILE_TEST depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE depends on MMU + depends on PM select DEVFREQ_GOV_SIMPLE_ONDEMAND select DRM_EXEC select DRM_GEM_SHMEM_HELPER diff --git a/drivers/gpu/drm/panthor/panthor_device.c b/drivers/gpu/drm/panthor/panthor_device.c index 68e467ee458a..efea29143a54 100644 --- a/drivers/gpu/drm/panthor/panthor_device.c +++ b/drivers/gpu/drm/panthor/panthor_device.c @@ -403,7 +403,6 @@ int panthor_device_mmap_io(struct panthor_device *ptdev, struct vm_area_struct * return 0; } -#ifdef CONFIG_PM int panthor_device_resume(struct device *dev) { struct panthor_device *ptdev = dev_get_drvdata(dev); @@ -548,4 +547,3 @@ int panthor_device_suspend(struct device *dev) mutex_unlock(&ptdev->pm.mmio_lock); return ret; } -#endif -- 2.43.0
