bd8107d730
Currently IGD drivers always need to access PCH by 1f.0. But we don't want to poke that directly to get ID, and although in real world different GPU should have different PCH. But actually the different PCH DIDs likely map to different PCH SKUs. We do the same thing for the GPU. For PCH, the different SKUs are going to be all the same silicon design and implementation, just different features turn on and off with fuses. The SW interfaces should be consistent across all SKUs in a given family (eg LPT). But just same features may not be supported. Most of these different PCH features probably don't matter to the Gfx driver, but obviously any difference in display port connections will so it should be fine with any PCH in case of passthrough. So currently use one PCH version, 0x8c4e, to cover all HSW(Haswell) scenarios, 0x9cc3 for BDW(Broadwell). Signed-off-by: Tiejun Chen <tiejun.chen@intel.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> |
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