Commit 61fb192a authored by Alex Deucher's avatar Alex Deucher

drm/radeon/dpm: add a helper to encode pcie lane setting

convert from number of lanes to register setting.
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent c4453e66
......@@ -1246,3 +1246,13 @@ u16 r600_get_pcie_lane_support(struct radeon_device *rdev,
return 16;
}
}
u8 r600_encode_pci_lane_width(u32 lanes)
{
u8 encoded_lanes[] = { 0, 1, 2, 0, 3, 0, 0, 0, 4, 0, 0, 0, 5, 0, 0, 0, 6 };
if (lanes > 16)
return 0;
return encoded_lanes[lanes];
}
......@@ -227,5 +227,6 @@ enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
u16 r600_get_pcie_lane_support(struct radeon_device *rdev,
u16 asic_lanes,
u16 default_lanes);
u8 r600_encode_pci_lane_width(u32 lanes);
#endif
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