diff --git a/drivers/gpu/drm/radeon/r600_dpm.c b/drivers/gpu/drm/radeon/r600_dpm.c index 34ea5d6ee4be779ced8b7c4893e608f4e5c92e0d..89c46c55f93d5d08d8a3f56e24d60be03b9e6f2a 100644 --- a/drivers/gpu/drm/radeon/r600_dpm.c +++ b/drivers/gpu/drm/radeon/r600_dpm.c @@ -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]; +} diff --git a/drivers/gpu/drm/radeon/r600_dpm.h b/drivers/gpu/drm/radeon/r600_dpm.h index 71d5d93c371ba25721f43571de014572519a9ef9..8dc1fbd9dbf143f5bba92376327a223b1ed56ecf 100644 --- a/drivers/gpu/drm/radeon/r600_dpm.h +++ b/drivers/gpu/drm/radeon/r600_dpm.h @@ -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