[PATCH 5.4 039/134] drm/panfrost: fix GENERIC_ATOMIC64 dependency

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From: Arnd Bergmann <arnd@xxxxxxxx>

[ Upstream commit 6437a549ae178a3f5a5c03e983f291ebcdc2bbc7 ]

On ARMv5 and earlier, a randconfig build can still run into

WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE
  Depends on [n]: IOMMU_SUPPORT [=y] && (ARM [=y] || ARM64 || COMPILE_TEST [=y]) && !GENERIC_ATOMIC64 [=y]
  Selected by [y]:
  - DRM_PANFROST [=y] && HAS_IOMEM [=y] && DRM [=y] && (ARM [=y] || ARM64 || COMPILE_TEST [=y] && !GENERIC_ATOMIC64 [=y]) && MMU [=y]

Rework the dependencies to always require a working cmpxchg64.

Fixes: db594ba3fcf9 ("drm/panfrost: depend on !GENERIC_ATOMIC64 when using COMPILE_TEST")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Signed-off-by: Steven Price <steven.price@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230117164456.1591901-1-arnd@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/panfrost/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panfrost/Kconfig b/drivers/gpu/drm/panfrost/Kconfig
index 86cdc0ce79e6..77f4d32e5204 100644
--- a/drivers/gpu/drm/panfrost/Kconfig
+++ b/drivers/gpu/drm/panfrost/Kconfig
@@ -3,7 +3,8 @@
 config DRM_PANFROST
 	tristate "Panfrost (DRM support for ARM Mali Midgard/Bifrost GPUs)"
 	depends on DRM
-	depends on ARM || ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)
+	depends on ARM || ARM64 || COMPILE_TEST
+	depends on !GENERIC_ATOMIC64    # for IOMMU_IO_PGTABLE_LPAE
 	depends on MMU
 	select DRM_SCHED
 	select IOMMU_SUPPORT
-- 
2.39.0






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