amdgpu_pll_get_use_mask
u32 amdgpu_pll_get_use_mask(struct drm_crtc *crtc);
pll_in_use = amdgpu_pll_get_use_mask(crtc);
pll_in_use = amdgpu_pll_get_use_mask(crtc);
pll_in_use = amdgpu_pll_get_use_mask(crtc);
pll_in_use = amdgpu_pll_get_use_mask(crtc);