SDMA_MAX_INSTANCE  488 drivers/gpu/drm/amd/amdgpu/cikd.h #define SDMA_MAX_INSTANCE 2
SDMA_MAX_INSTANCE 2466 drivers/gpu/drm/amd/amdgpu/sid.h #define SDMA_MAX_INSTANCE 2
SDMA_MAX_INSTANCE   28 drivers/gpu/drm/amd/amdgpu/vid.h #define SDMA_MAX_INSTANCE 2