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drm/radeon: add r600_get_pcie_lane_support helper 

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Alex Deucher 2013-05-14 17:44:31 -04:00
parent 96d2af2150
commit 4df5ac2652
2 changed files with 27 additions and 0 deletions
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23
drivers/gpu/drm/radeon/r600_dpm.c
View File

@ -1223,3 +1223,26 @@ enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
}
return RADEON_PCIE_GEN1;
}
u16 r600_get_pcie_lane_support(struct radeon_device *rdev,
u16 asic_lanes,
u16 default_lanes)
{
switch (asic_lanes) {
case 0:
default:
return default_lanes;
case 1:
return 1;
case 2:
return 2;
case 4:
return 4;
case 8:
return 8;
case 12:
return 12;
case 16:
return 16;
}
}

4
drivers/gpu/drm/radeon/r600_dpm.h
View File

@ -224,4 +224,8 @@ enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
enum radeon_pcie_gen asic_gen,
enum radeon_pcie_gen default_gen);
u16 r600_get_pcie_lane_support(struct radeon_device *rdev,
u16 asic_lanes,
u16 default_lanes);
#endif