Created Unassigned: BC6H mips 4x4 and below are black [1272]

I tracked this down to the dispatch calls passing in 0 threads:

RunComputeShader( pContext, m_pTryModeG10CS, pSRVs, 2, pCBCS, pErrBestModeUAV[0], uThreadGroupCount / 4, 1, 1 );

should be:

RunComputeShader(pContext, m_pTryModeG10CS, pSRVs, 2, pCBCS, pErrBestModeUAV[0], __max(uThreadGroupCount / 4, 1), 1, 1);

__max() should be added to subsequent calls to RunComputeShader as well. This already exists for BC7, but not BC6H.