drm/radeon/dpm: add debugfs support for 7xx/evergreen/btc

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

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

4 files changed, 39 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 58d4cc5c7c97..a2a34f86434b 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1392,6 +1392,7 @@ static struct radeon_asic rv770_asic = {
                 .get_sclk = &rv770_dpm_get_sclk,
                 .get_mclk = &rv770_dpm_get_mclk,
                 .print_power_state = &rv770_dpm_print_power_state,
+                .debugfs_print_current_performance_level = &rv770_dpm_debugfs_print_current_performance_level,
         },
         .pflip = {
                 .pre_page_flip = &rs600_pre_page_flip,
@@ -1514,6 +1515,7 @@ static struct radeon_asic evergreen_asic = {
                 .get_sclk = &rv770_dpm_get_sclk,
                 .get_mclk = &rv770_dpm_get_mclk,
                 .print_power_state = &rv770_dpm_print_power_state,
+                .debugfs_print_current_performance_level = &rv770_dpm_debugfs_print_current_performance_level,
         },
         .pflip = {
                 .pre_page_flip = &evergreen_pre_page_flip,
@@ -1758,6 +1760,7 @@ static struct radeon_asic btc_asic = {
                 .get_sclk = &btc_dpm_get_sclk,
                 .get_mclk = &btc_dpm_get_mclk,
                 .print_power_state = &rv770_dpm_print_power_state,
+                .debugfs_print_current_performance_level = &rv770_dpm_debugfs_print_current_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 6b1ede11ed20..39f5d96d7c49 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -476,6 +476,8 @@ u32 rv770_dpm_get_sclk(struct radeon_device *rdev, bool low);
 u32 rv770_dpm_get_mclk(struct radeon_device *rdev, bool low);
 void rv770_dpm_print_power_state(struct radeon_device *rdev,
                                  struct radeon_ps *ps);
+void rv770_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+                                                       struct seq_file *m);
 
 /*
  * evergreen
diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c
index 7f6fa6221234..2436b5c7e66e 100644
--- a/drivers/gpu/drm/radeon/rv770_dpm.c
+++ b/drivers/gpu/drm/radeon/rv770_dpm.c
@@ -2430,6 +2430,36 @@ void rv770_dpm_print_power_state(struct radeon_device *rdev,
         r600_dpm_print_ps_status(rdev, rps);
 }
 
+void rv770_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+                                                       struct seq_file *m)
+{
+        struct radeon_ps *rps = rdev->pm.dpm.current_ps;
+        struct rv7xx_ps *ps = rv770_get_ps(rps);
+        struct rv7xx_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);
+                if (rdev->family >= CHIP_CEDAR) {
+                        seq_printf(m, "power level %d    sclk: %u mclk: %u vddc: %u vddci: %u\n",
+                                   current_index, pl->sclk, pl->mclk, pl->vddc, pl->vddci);
+                } else {
+                        seq_printf(m, "power level %d    sclk: %u mclk: %u vddc: %u\n",
+                                   current_index, pl->sclk, pl->mclk, pl->vddc);
+                }
+        }
+}
+
 void rv770_dpm_fini(struct radeon_device *rdev)
 {
         int i;
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index 784eeaf315c3..6bef2b7d601b 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -207,6 +207,10 @@
 #       define MUX_TCLK_TO_XCLK                           (1 << 8)
 #       define XTALIN_DIVIDE                              (1 << 9)
 
+#define TARGET_AND_CURRENT_PROFILE_INDEX                  0x66c
+#       define CURRENT_PROFILE_INDEX_MASK                 (0xf << 4)
+#       define CURRENT_PROFILE_INDEX_SHIFT                4
+
 #define S0_VID_LOWER_SMIO_CNTL                            0x678
 #define S1_VID_LOWER_SMIO_CNTL                            0x67c
 #define S2_VID_LOWER_SMIO_CNTL                            0x680