drm/radeon/tn: implement get_current_sclk/mclk

Will be used for exposing current clocks via INFO ioctl.

Tested-by: Marek Olšák <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/radeon/radeon_asic.c

···
 		.debugfs_print_current_performance_level = &trinity_dpm_debugfs_print_current_performance_level,
 		.force_performance_level = &trinity_dpm_force_performance_level,
 		.enable_bapm = &trinity_dpm_enable_bapm,
+		.get_current_sclk = &trinity_dpm_get_current_sclk,
+		.get_current_mclk = &trinity_dpm_get_current_mclk,
 	},
 	.pflip = {
 		.page_flip = &evergreen_page_flip,

drivers/gpu/drm/radeon/radeon_asic.h

···
 int trinity_dpm_force_performance_level(struct radeon_device *rdev,
 					enum radeon_dpm_forced_level level);
 void trinity_dpm_enable_bapm(struct radeon_device *rdev, bool enable);
+u32 trinity_dpm_get_current_sclk(struct radeon_device *rdev);
+u32 trinity_dpm_get_current_mclk(struct radeon_device *rdev);
 
 /* DCE6 - SI */
 void dce6_bandwidth_update(struct radeon_device *rdev);

drivers/gpu/drm/radeon/trinity_dpm.c

···
 	}
 }
 
+u32 trinity_dpm_get_current_sclk(struct radeon_device *rdev)
+{
+	struct trinity_power_info *pi = trinity_get_pi(rdev);
+	struct radeon_ps *rps = &pi->current_rps;
+	struct trinity_ps *ps = trinity_get_ps(rps);
+	struct trinity_pl *pl;
+	u32 current_index =
+		(RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURRENT_STATE_MASK) >>
+		CURRENT_STATE_SHIFT;
+
+	if (current_index >= ps->num_levels) {
+		return 0;
+	} else {
+		pl = &ps->levels[current_index];
+		return pl->sclk;
+	}
+}
+
+u32 trinity_dpm_get_current_mclk(struct radeon_device *rdev)
+{
+	struct trinity_power_info *pi = trinity_get_pi(rdev);
+
+	return pi->sys_info.bootup_uma_clk;
+}
+
 void trinity_dpm_fini(struct radeon_device *rdev)
 {
 	int i;