drm/radeon/rv6xx: 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

···
 		.print_power_state = &rv6xx_dpm_print_power_state,
 		.debugfs_print_current_performance_level = &rv6xx_dpm_debugfs_print_current_performance_level,
 		.force_performance_level = &rv6xx_dpm_force_performance_level,
+		.get_current_sclk = &rv6xx_dpm_get_current_sclk,
+		.get_current_mclk = &rv6xx_dpm_get_current_mclk,
 	},
 	.pflip = {
 		.page_flip = &rs600_page_flip,

drivers/gpu/drm/radeon/radeon_asic.h

···
 						       struct seq_file *m);
 int rv6xx_dpm_force_performance_level(struct radeon_device *rdev,
 				      enum radeon_dpm_forced_level level);
+u32 rv6xx_dpm_get_current_sclk(struct radeon_device *rdev);
+u32 rv6xx_dpm_get_current_mclk(struct radeon_device *rdev);
 /* rs780 dpm */
 int rs780_dpm_init(struct radeon_device *rdev);
 int rs780_dpm_enable(struct radeon_device *rdev);

drivers/gpu/drm/radeon/rv6xx_dpm.c

···
 	}
 }
 
+/* get the current sclk in 10 khz units */
+u32 rv6xx_dpm_get_current_sclk(struct radeon_device *rdev)
+{
+	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) {
+		return 0;
+	} else {
+		if (current_index == 0)
+			pl = &ps->low;
+		else if (current_index == 1)
+			pl = &ps->medium;
+		else /* current_index == 2 */
+			pl = &ps->high;
+		return pl->sclk;
+	}
+}
+
+/* get the current mclk in 10 khz units */
+u32 rv6xx_dpm_get_current_mclk(struct radeon_device *rdev)
+{
+	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) {
+		return 0;
+	} else {
+		if (current_index == 0)
+			pl = &ps->low;
+		else if (current_index == 1)
+			pl = &ps->medium;
+		else /* current_index == 2 */
+			pl = &ps->high;
+		return pl->mclk;
+	}
+}
+
 void rv6xx_dpm_fini(struct radeon_device *rdev)
 {
 	int i;