drm/amdgpu: Add module param to control CIK support

If AMDGPU supports CIK, add a module parameter to control CIK
support. It's on by default in AMDGPU, while it is off by default
in radeon.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Michel Dänzer <michel.daenzer@amd.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index cda06a1bd7d7..e0911798e2c2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -87,6 +87,21 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
         struct amdgpu_device *adev;
         int r, acpi_status;
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+        if (!amdgpu_cik_support) {
+                switch (flags & AMD_ASIC_MASK) {
+                case CHIP_KAVERI:
+                case CHIP_BONAIRE:
+                case CHIP_HAWAII:
+                case CHIP_KABINI:
+                case CHIP_MULLINS:
+                        dev_info(dev->dev,
+                                 "CIK support disabled by module param\n");
+                        return -ENODEV;
+                }
+        }
+#endif
+
         adev = kzalloc(sizeof(struct amdgpu_device), GFP_KERNEL);
         if (adev == NULL) {
                 return -ENOMEM;