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>

1 files changed, 24 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c
index 9af464d48eaa..c3025de4f4e2 100644
--- a/drivers/gpu/drm/radeon/rv770_dpm.c
+++ b/drivers/gpu/drm/radeon/rv770_dpm.c
@@ -1471,14 +1471,30 @@ int rv770_restrict_performance_levels_before_switch(struct radeon_device *rdev)
         return 0;
 }
 
-int rv770_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
-{
-        if (rv770_send_msg_to_smc(rdev, (PPSMC_Msg)(PPSMC_MSG_NoForcedLevel)) != PPSMC_Result_OK)
-                return -EINVAL;
+int rv770_dpm_force_performance_level(struct radeon_device *rdev,
+                                      enum radeon_dpm_forced_level level)
+{
+        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, (PPSMC_Msg)(PPSMC_MSG_ZeroLevelsDisabled)) != PPSMC_Result_OK)
+        if (rv770_send_msg_to_smc(rdev, msg) != 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;
         }