drm/radeon/dpm: add debugfs support for rv6xx

This allows you to look at the current DPM state via
debugfs.

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

3 files changed, 28 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index c3df589715a0..58d4cc5c7c97 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1160,6 +1160,7 @@ static struct radeon_asic rv6xx_asic = {
                 .get_sclk = &rv6xx_dpm_get_sclk,
                 .get_mclk = &rv6xx_dpm_get_mclk,
                 .print_power_state = &rv6xx_dpm_print_power_state,
+                .debugfs_print_current_performance_level = &rv6xx_dpm_debugfs_print_current_performance_level,
         },
         .pflip = {
                 .pre_page_flip = &rs600_pre_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 2497d0a02de5..6b1ede11ed20 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -416,6 +416,8 @@ u32 rv6xx_dpm_get_sclk(struct radeon_device *rdev, bool low);
 u32 rv6xx_dpm_get_mclk(struct radeon_device *rdev, bool low);
 void rv6xx_dpm_print_power_state(struct radeon_device *rdev,
                                  struct radeon_ps *ps);
+void rv6xx_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+                                                       struct seq_file *m);
 /* rs780 dpm */
 int rs780_dpm_init(struct radeon_device *rdev);
 int rs780_dpm_enable(struct radeon_device *rdev);
diff --git a/drivers/gpu/drm/radeon/rv6xx_dpm.c b/drivers/gpu/drm/radeon/rv6xx_dpm.c
index 0e8b7d9b954b..33705c5c8369 100644
--- a/drivers/gpu/drm/radeon/rv6xx_dpm.c
+++ b/drivers/gpu/drm/radeon/rv6xx_dpm.c
@@ -2027,6 +2027,31 @@ void rv6xx_dpm_print_power_state(struct radeon_device *rdev,
         r600_dpm_print_ps_status(rdev, rps);
 }
 
+void rv6xx_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+                                                       struct seq_file *m)
+{
+        struct radeon_ps *rps = rdev->pm.dpm.current_ps;
+        struct rv6xx_ps *ps = rv6xx_get_ps(rps);
+        struct rv6xx_pl *pl;
+        u32 current_index =
+                (RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURRENT_PROFILE_INDEX_MASK) >>
+                CURRENT_PROFILE_INDEX_SHIFT;
+
+        if (current_index > 2) {
+                seq_printf(m, "invalid dpm profile %d\n", current_index);
+        } else {
+                if (current_index == 0)
+                        pl = &ps->low;
+                else if (current_index == 1)
+                        pl = &ps->medium;
+                else /* current_index == 2 */
+                        pl = &ps->high;
+                seq_printf(m, "uvd    vclk: %d dclk: %d\n", rps->vclk, rps->dclk);
+                seq_printf(m, "power level %d    sclk: %u mclk: %u vddc: %u\n",
+                           current_index, pl->sclk, pl->mclk, pl->vddc);
+        }
+}
+
 void rv6xx_dpm_fini(struct radeon_device *rdev)
 {
         int i;