MS designed and produced custom silicon for HoloLens 2 (the Holographic Processing Unit 2.0) [0][1]. The Microsoft SQ1 in Surface Pro X is probably also produced by them, though the design is in collaboration with Qualcomm.
[0] https://www.hotchips.org/hc31/HC31_2.14_Terry_Microsoft_Aug2...
[1] https://youtu.be/IjxpMZUqu6c?t=3814
MS designed and produced custom silicon for HoloLens 2 (the Holographic Processing Unit 2.0) [0][1]. The Microsoft SQ1 in Surface Pro X is probably also produced by them, though the design is in collaboration with Qualcomm.
[0] https://www.hotchips.org/hc31/HC31_2.14_Terry_Microsoft_Aug2...
[1] https://youtu.be/IjxpMZUqu6c?t=3814