drm/amdgpu: Use software timer to generate vsync interrupt.

For virtual display feature, use the software timer to
simulate the vsync interrupt.

Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.h b/drivers/gpu/drm/amd/amdgpu/dce_virtual.h
index d205d7f6f6ab..e239243f6ebc 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.h
+++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.h
@@ -25,5 +25,7 @@
 #define __DCE_VIRTUAL_H__
 
 extern const struct amd_ip_funcs dce_virtual_ip_funcs;
+#define DCE_VIRTUAL_VBLANK_PERIOD 16666666
+
 #endif