drm/nouveau/device/pci: set as non-CPU-coherent on ARM64

Without this buffer inconsistencies may appear between the CPU
and GPU when using a PCI GPU on an ARM64 board.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c
index 62ad030..18fab39 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c
@@ -1614,7 +1614,7 @@ nvkm_device_pci_func = {
        .fini = nvkm_device_pci_fini,
        .resource_addr = nvkm_device_pci_resource_addr,
        .resource_size = nvkm_device_pci_resource_size,
-       .cpu_coherent = !IS_ENABLED(CONFIG_ARM),
+       .cpu_coherent = !IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_ARM64),
 };
 
 int