drm/radeon/dpm: implement force performance level for cayman

Allows you to force a performance level via sysfs.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 34 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/ni_dpm.c b/drivers/gpu/drm/radeon/ni_dpm.c
index a4cb99c2da85..bd96eaa3f015 100644
--- a/drivers/gpu/drm/radeon/ni_dpm.c
+++ b/drivers/gpu/drm/radeon/ni_dpm.c
@@ -1037,13 +1037,37 @@ static int ni_restrict_performance_levels_before_switch(struct radeon_device *rd
                 0 : -EINVAL;
 }
 
-static int ni_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
+int ni_dpm_force_performance_level(struct radeon_device *rdev,
+                                   enum radeon_dpm_forced_level level)
 {
-        if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
-                return -EINVAL;
+        struct radeon_ps *rps = rdev->pm.dpm.current_ps;
+        struct ni_ps *ps = ni_get_ps(rps);
+        u32 levels;
 
-        return (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) == PPSMC_Result_OK) ?
-                0 : -EINVAL;
+        if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
+                if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
+                        return -EINVAL;
+
+                if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 1) != PPSMC_Result_OK)
+                        return -EINVAL;
+        } else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
+                if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
+                        return -EINVAL;
+
+                levels = ps->performance_level_count - 1;
+                if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, levels) != PPSMC_Result_OK)
+                        return -EINVAL;
+        } else if (level == RADEON_DPM_FORCED_LEVEL_AUTO) {
+                if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
+                        return -EINVAL;
+
+                if (ni_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
+                        return -EINVAL;
+        }
+
+        rdev->pm.dpm.forced_level = level;
+
+        return 0;
 }
 
 static void ni_stop_smc(struct radeon_device *rdev)
@@ -3831,9 +3855,9 @@ int ni_dpm_set_power_state(struct radeon_device *rdev)
                 return ret;
         }
 
-        ret = ni_unrestrict_performance_levels_after_switch(rdev);
+        ret = ni_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
         if (ret) {
-                DRM_ERROR("ni_unrestrict_performance_levels_after_switch failed\n");
+                DRM_ERROR("ni_dpm_force_performance_level failed\n");
                 return ret;
         }
 
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 221a0b31e649..9c1b7b1c0268 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1940,6 +1940,7 @@ static struct radeon_asic cayman_asic = {
                 .get_mclk = &ni_dpm_get_mclk,
                 .print_power_state = &ni_dpm_print_power_state,
                 .debugfs_print_current_performance_level = &ni_dpm_debugfs_print_current_performance_level,
+                .force_performance_level = &ni_dpm_force_performance_level,
         },
         .pflip = {
                 .pre_page_flip = &evergreen_pre_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index a053dc1e7866..2bacc777d549 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -617,6 +617,8 @@ void ni_dpm_print_power_state(struct radeon_device *rdev,
                               struct radeon_ps *ps);
 void ni_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
                                                     struct seq_file *m);
+int ni_dpm_force_performance_level(struct radeon_device *rdev,
+                                   enum radeon_dpm_forced_level level);
 int trinity_dpm_init(struct radeon_device *rdev);
 int trinity_dpm_enable(struct radeon_device *rdev);
 void trinity_dpm_disable(struct radeon_device *rdev);