The test fails for me with the setup below:
deqp: nougat-cts-dev@4acf725 and master@7363696
hw: Broadwell 0x1616
The test failed because in
Mesa chose BRW_SURFACE_FORMAT_R8G8B8A8_UNORM as the storage format.
The two formats have incompatible precision in the alpha channel. One
provides binary alpha; the other provides gradient alpha.
Intel hardware supports BRW_SURFACE_FORMAT_B5G5R5A1_UNORM, so we need to teach
glTexImage2D to choose that instead.