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drm/radeon/dpm: add pcie gen helper function 

Add a helper function to determine the preferred
pcie gen based on the card, system, and circumstance.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-03-25 18:28:29 -04:00
parent 2abba66e7a
commit 4bd9f516f6
2 changed files with 28 additions and 0 deletions
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23
drivers/gpu/drm/radeon/r600_dpm.c
View File

@ -997,3 +997,26 @@ void r600_free_extended_power_table(struct radeon_device *rdev)
if (rdev->pm.dpm.dyn_state.ppm_table)
kfree(rdev->pm.dpm.dyn_state.ppm_table);
}
enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
u32 sys_mask,
enum radeon_pcie_gen asic_gen,
enum radeon_pcie_gen default_gen)
{
switch (asic_gen) {
case RADEON_PCIE_GEN1:
return RADEON_PCIE_GEN1;
case RADEON_PCIE_GEN2:
return RADEON_PCIE_GEN2;
case RADEON_PCIE_GEN3:
return RADEON_PCIE_GEN3;
default:
if ((sys_mask & DRM_PCIE_SPEED_80) && (default_gen == RADEON_PCIE_GEN3))
return RADEON_PCIE_GEN3;
else if ((sys_mask & DRM_PCIE_SPEED_50) && (default_gen == RADEON_PCIE_GEN2))
return RADEON_PCIE_GEN2;
else
return RADEON_PCIE_GEN1;
}
return RADEON_PCIE_GEN1;
}

5
drivers/gpu/drm/radeon/r600_dpm.h
View File

@ -218,4 +218,9 @@ bool r600_is_internal_thermal_sensor(enum radeon_int_thermal_type sensor);
int r600_parse_extended_power_table(struct radeon_device *rdev);
void r600_free_extended_power_table(struct radeon_device *rdev);
enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
u32 sys_mask,
enum radeon_pcie_gen asic_gen,
enum radeon_pcie_gen default_gen);
#endif