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drm/radeon/dpm: implement force performance levels for 7xx/eg/btc

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Allows you to limit the selected power levels via sysfs.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2013-07-02 18:40:35 -04:00
parent 70d01a5ee2
commit 8b5e6b7f0e
7 changed files with 36 additions and 11 deletions
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29
drivers/gpu/drm/radeon/rv770_dpm.c
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@@ -1471,13 +1471,29 @@ int rv770_restrict_performance_levels_before_switch(struct radeon_device *rdev)
return 0;
}
int rv770_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
int rv770_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{
if (rv770_send_msg_to_smc(rdev, (PPSMC_Msg)(PPSMC_MSG_NoForcedLevel)) != PPSMC_Result_OK)
PPSMC_Msg msg;
if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
if (rv770_send_msg_to_smc(rdev, PPSMC_MSG_ZeroLevelsDisabled) != PPSMC_Result_OK)
return -EINVAL;
msg = PPSMC_MSG_ForceHigh;
} else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
if (rv770_send_msg_to_smc(rdev, PPSMC_MSG_NoForcedLevel) != PPSMC_Result_OK)
return -EINVAL;
msg = (PPSMC_Msg)(PPSMC_MSG_TwoLevelsDisabled);
} else {
if (rv770_send_msg_to_smc(rdev, PPSMC_MSG_NoForcedLevel) != PPSMC_Result_OK)
return -EINVAL;
msg = (PPSMC_Msg)(PPSMC_MSG_ZeroLevelsDisabled);
}
if (rv770_send_msg_to_smc(rdev, msg) != PPSMC_Result_OK)
return -EINVAL;
if (rv770_send_msg_to_smc(rdev, (PPSMC_Msg)(PPSMC_MSG_ZeroLevelsDisabled)) != PPSMC_Result_OK)
return -EINVAL;
rdev->pm.dpm.forced_level = level;
return 0;
}
@@ -2047,9 +2063,10 @@ int rv770_dpm_set_power_state(struct radeon_device *rdev)
if (pi->dcodt)
rv770_program_dcodt_after_state_switch(rdev, new_ps, old_ps);
rv770_set_uvd_clock_after_set_eng_clock(rdev, new_ps, old_ps);
ret = rv770_unrestrict_performance_levels_after_switch(rdev);
ret = rv770_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
if (ret) {
DRM_ERROR("rv770_unrestrict_performance_levels_after_switch failed\n");
DRM_ERROR("rv770_dpm_force_performance_level failed\n");
return ret;
}