drm/radeon/dpm: implement force performance levels for 7xx/eg/btc
Allows you to limit the selected power levels via sysfs.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c
index 9af464d..c3025de 100644
--- a/drivers/gpu/drm/radeon/rv770_dpm.c
+++ b/drivers/gpu/drm/radeon/rv770_dpm.c
@@ -1471,13 +1471,29 @@
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 @@
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;
}