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

Allows you to force the selected performance level via sysfs.

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

6 files changed, 44 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/ppsmc.h b/drivers/gpu/drm/radeon/ppsmc.h
index fc71ca6b04ca..b5564a3645d2 100644
--- a/drivers/gpu/drm/radeon/ppsmc.h
+++ b/drivers/gpu/drm/radeon/ppsmc.h
@@ -103,6 +103,7 @@ typedef uint8_t PPSMC_Result;
 #define PPSMC_MSG_DPM_Config                ((uint32_t) 0x102)
 #define PPSMC_MSG_DPM_ForceState            ((uint32_t) 0x104)
 #define PPSMC_MSG_PG_SIMD_Config            ((uint32_t) 0x108)
+#define PPSMC_MSG_DPM_N_LevelsDisabled      ((uint32_t) 0x112)
 #define PPSMC_MSG_DCE_RemoveVoltageAdjustment   ((uint32_t) 0x11d)
 #define PPSMC_MSG_DCE_AllowVoltageAdjustment    ((uint32_t) 0x11e)
 #define PPSMC_MSG_UVD_DPM_Config            ((uint32_t) 0x124)
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 5d592aed1ee9..a6906d4ca734 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -2115,6 +2115,7 @@ static struct radeon_asic trinity_asic = {
                 .get_mclk = &trinity_dpm_get_mclk,
                 .print_power_state = &trinity_dpm_print_power_state,
                 .debugfs_print_current_performance_level = &trinity_dpm_debugfs_print_current_performance_level,
+                .force_performance_level = &trinity_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 1a89b3af04f3..4456f85a932e 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -636,6 +636,8 @@ void trinity_dpm_print_power_state(struct radeon_device *rdev,
                                    struct radeon_ps *ps);
 void trinity_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
                                                          struct seq_file *m);
+int trinity_dpm_force_performance_level(struct radeon_device *rdev,
+                                        enum radeon_dpm_forced_level level);
 
 /* DCE6 - SI */
 void dce6_bandwidth_update(struct radeon_device *rdev);
diff --git a/drivers/gpu/drm/radeon/trinity_dpm.c b/drivers/gpu/drm/radeon/trinity_dpm.c
index 8a32bcc6bbb5..a1eb5f59939f 100644
--- a/drivers/gpu/drm/radeon/trinity_dpm.c
+++ b/drivers/gpu/drm/radeon/trinity_dpm.c
@@ -1158,6 +1158,37 @@ static void trinity_setup_nbp_sim(struct radeon_device *rdev,
         }
 }
 
+int trinity_dpm_force_performance_level(struct radeon_device *rdev,
+                                        enum radeon_dpm_forced_level level)
+{
+        struct trinity_power_info *pi = trinity_get_pi(rdev);
+        struct radeon_ps *rps = &pi->current_rps;
+        struct trinity_ps *ps = trinity_get_ps(rps);
+        int i, ret;
+
+        if (ps->num_levels <= 1)
+                return 0;
+
+        if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
+                /* not supported by the hw */
+                return -EINVAL;
+        } else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
+                ret = trinity_dpm_n_levels_disabled(rdev, ps->num_levels - 1);
+                if (ret)
+                        return ret;
+        } else {
+                for (i = 0; i < ps->num_levels; i++) {
+                        ret = trinity_dpm_n_levels_disabled(rdev, 0);
+                        if (ret)
+                                return ret;
+                }
+        }
+
+        rdev->pm.dpm.forced_level = level;
+
+        return 0;
+}
+
 int trinity_dpm_pre_set_power_state(struct radeon_device *rdev)
 {
         struct trinity_power_info *pi = trinity_get_pi(rdev);
@@ -1190,6 +1221,7 @@ int trinity_dpm_set_power_state(struct radeon_device *rdev)
                 trinity_force_level_0(rdev);
                 trinity_unforce_levels(rdev);
                 trinity_set_uvd_clock_after_set_eng_clock(rdev, new_ps, old_ps);
+                rdev->pm.dpm.forced_level = RADEON_DPM_FORCED_LEVEL_AUTO;
         }
         trinity_release_mutex(rdev);
 
diff --git a/drivers/gpu/drm/radeon/trinity_dpm.h b/drivers/gpu/drm/radeon/trinity_dpm.h
index c621b843aab5..e82df071f8b3 100644
--- a/drivers/gpu/drm/radeon/trinity_dpm.h
+++ b/drivers/gpu/drm/radeon/trinity_dpm.h
@@ -121,6 +121,7 @@ struct trinity_power_info {
 int trinity_dpm_config(struct radeon_device *rdev, bool enable);
 int trinity_uvd_dpm_config(struct radeon_device *rdev);
 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n);
+int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n);
 int trinity_dpm_no_forced_level(struct radeon_device *rdev);
 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
                                           bool enable);
diff --git a/drivers/gpu/drm/radeon/trinity_smc.c b/drivers/gpu/drm/radeon/trinity_smc.c
index 85f86a29513c..a42d89f1830c 100644
--- a/drivers/gpu/drm/radeon/trinity_smc.c
+++ b/drivers/gpu/drm/radeon/trinity_smc.c
@@ -73,6 +73,13 @@ int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
 }
 
+int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
+{
+        WREG32_SMC(SMU_SCRATCH0, n);
+
+        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
+}
+
 int trinity_uvd_dpm_config(struct radeon_device *rdev)
 {
         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);