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

Allows you to force the selected performance level via sysfs.

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

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 9c1b7b1c02683f58284870abd30626758ffffe83..6ec4831fdb588526bde692cd03893ff355095dd7 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -2287,6 +2287,7 @@ static struct radeon_asic si_asic = {
                .get_mclk = &ni_dpm_get_mclk,
                .print_power_state = &ni_dpm_print_power_state,
                .debugfs_print_current_performance_level = &si_dpm_debugfs_print_current_performance_level,
+               .force_performance_level = &si_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 2bacc777d549ccf7b70350a3fca58e337906f172..7efa51a13b3c2aa5bba3753f9a7aa45a9a06d3a7 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -683,6 +683,8 @@ void si_dpm_fini(struct radeon_device *rdev);
 void si_dpm_display_configuration_changed(struct radeon_device *rdev);
 void si_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
                                                    struct seq_file *m);
+int si_dpm_force_performance_level(struct radeon_device *rdev,
+                                  enum radeon_dpm_forced_level level);
 
 /* DCE8 - CIK */
 void dce8_bandwidth_update(struct radeon_device *rdev);

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index a7e97cd05e96bc86ca209e0feeb380e4116a0ea9..700a167be369886d89c1c04db1c2e9c78a2bc9dd 100644 (file)
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3231,16 +3231,38 @@ static int si_restrict_performance_levels_before_switch(struct radeon_device *rd
                0 : -EINVAL;
 }
 
-#if 0
-static int si_unrestrict_performance_levels_after_switch(struct radeon_device *rdev)
+int si_dpm_force_performance_level(struct radeon_device *rdev,
+                                  enum radeon_dpm_forced_level level)
 {
-       if (si_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 (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) == PPSMC_Result_OK) ?
-               0 : -EINVAL;
+       if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
+               if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
+                       return -EINVAL;
+
+               if (si_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 (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
+                       return -EINVAL;
+
+               levels = ps->performance_level_count - 1;
+               if (si_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 (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetForcedLevels, 0) != PPSMC_Result_OK)
+                       return -EINVAL;
+
+               if (si_send_msg_to_smc_with_parameter(rdev, PPSMC_MSG_SetEnabledLevels, 0) != PPSMC_Result_OK)
+                       return -EINVAL;
+       }
+
+       rdev->pm.dpm.forced_level = level;
+
+       return 0;
 }
-#endif
 
 static int si_set_boot_state(struct radeon_device *rdev)
 {
@@ -5992,11 +6014,13 @@ int si_dpm_set_power_state(struct radeon_device *rdev)
 
 #if 0
        /* XXX */
-       ret = si_unrestrict_performance_levels_after_switch(rdev);
+       ret = si_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_AUTO);
        if (ret) {
-               DRM_ERROR("si_unrestrict_performance_levels_after_switch failed\n");
+               DRM_ERROR("si_dpm_force_performance_level failed\n");
                return ret;
        }
+#else
+       rdev->pm.dpm.forced_level = RADEON_DPM_FORCED_LEVEL_AUTO;
 #endif
 
        return 0;