drm/amdgpu: Add module param to control SI support

[karo-tx-linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_kms.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index e0911798e2c244f51b52f50b0de5947fd1224f43..bd35c83c7c787b9e31af66ccace313601346614b 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -87,6 +87,23 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
        struct amdgpu_device *adev;
        int r, acpi_status;
 
+#ifdef CONFIG_DRM_AMDGPU_SI
+       if (!amdgpu_si_support) {
+               switch (flags & AMD_ASIC_MASK) {
+               case CHIP_TAHITI:
+               case CHIP_PITCAIRN:
+               case CHIP_VERDE:
+               case CHIP_OLAND:
+               case CHIP_HAINAN:
+                       dev_info(dev->dev,
+                                "SI support provided by radeon.\n");
+                       dev_info(dev->dev,
+               "Use radeon.si_support=0 amdgpu.si_support=1 to override.\n"
+                               );
+                       return -ENODEV;
+               }
+       }
+#endif
 #ifdef CONFIG_DRM_AMDGPU_CIK
        if (!amdgpu_cik_support) {
                switch (flags & AMD_ASIC_MASK) {