drm/radeon/dpm: add debugfs support for SI

This allows you to look at the current DPM state via
debugfs.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_asic.c

@@ -2282,6 +2282,7 @@ static struct radeon_asic si_asic = {
 		.get_sclk = &ni_dpm_get_sclk,
 		.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,
 	},
 	.pflip = {
 		.pre_page_flip = &evergreen_pre_page_flip,

drivers/gpu/drm/radeon/radeon_asic.h

@@ -677,6 +677,8 @@ int si_dpm_set_power_state(struct radeon_device *rdev);
 void si_dpm_post_set_power_state(struct radeon_device *rdev);
 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);
 
 /* DCE8 - CIK */
 void dce8_bandwidth_update(struct radeon_device *rdev);

drivers/gpu/drm/radeon/si_dpm.c

@@ -6385,3 +6385,22 @@ void si_dpm_fini(struct radeon_device *rdev)
 	r600_free_extended_power_table(rdev);
 }
 
+void si_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+						    struct seq_file *m)
+{
+	struct radeon_ps *rps = rdev->pm.dpm.current_ps;
+	struct ni_ps *ps = ni_get_ps(rps);
+	struct rv7xx_pl *pl;
+	u32 current_index =
+		(RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURRENT_STATE_INDEX_MASK) >>
+		CURRENT_STATE_INDEX_SHIFT;
+
+	if (current_index >= ps->performance_level_count) {
+		seq_printf(m, "invalid dpm profile %d\n", current_index);
+	} else {
+		pl = &ps->performance_levels[current_index];
+		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 vddci: %u pcie gen: %u\n",
+			   current_index, pl->sclk, pl->mclk, pl->vddc, pl->vddci, pl->pcie_gen + 1);
+	}
+}

drivers/gpu/drm/radeon/sid.h

@@ -220,6 +220,10 @@
 #       define GFX_CLK_OFF_ACPI_D3                        (1 << 13)
 #       define DYN_LIGHT_SLEEP_EN                         (1 << 14)
 
+#define TARGET_AND_CURRENT_PROFILE_INDEX                  0x798
+#       define CURRENT_STATE_INDEX_MASK                   (0xf << 4)
+#       define CURRENT_STATE_INDEX_SHIFT                  4
+
 #define CG_FTV                                            0x7bc
 
 #define CG_FFCT_0                                         0x7c0