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

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

drivers/gpu/drm/radeon/r600_dpm.c

+10 −0
Original line number Diff line number Diff line
@@ -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];

}

drivers/gpu/drm/radeon/r600_dpm.h

+1 −0
Original line number Diff line number Diff line
@@ -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