Comment # 30
on bug 93217
from Alex Deucher
(In reply to Mike Lothian from comment #29) > Would you like me to try re-enabling pcie dpm and use the new kernel > parameters in drm-next-4.6-wip? Yes, can you see what combinations of pcie_gen_cap and pcie_lane_cap help? See amd_pcie.h. pcie_gen_cap: bits 31:16 define the gen speeds supported by the platform (e.g., the motherboard). Setting it to CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3 (0x00040000) would indicate that the motherboard only supports gen3 (not gen 2 or 1). bits 15:0 define the pcie speeds supported by the GPU itself. Setting this to CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3 (0x00000004) means the asic only supports gen 3. pcie_lane_cap: bits 31:16 define the link width supported by the platform.
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