HPD4_REGISTER_OFFSET   51 drivers/gpu/drm/amd/amdgpu/cikd.h #define HPD4_REGISTER_OFFSET                 (0x1813 - 0x1807)
HPD4_REGISTER_OFFSET   67 drivers/gpu/drm/amd/amdgpu/vid.h #define HPD4_REGISTER_OFFSET                 (0x18b8 - 0x1898)