drm/amd/pm: support ss metrics read on renoir

add support to read smart shift apu and dgpu power share
on renoir.
Signed-off-by: Sathishkumar S <sathishkumar.sundararaju@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu12/renoir_ppt.c

@@ -1180,6 +1180,28 @@ static int renoir_get_smu_metrics_data(struct smu_context *smu,
 	case METRICS_VOLTAGE_VDDSOC:
 		*value = metrics->Voltage[1];
 		break;
+	case METRICS_SS_APU_SHARE:
+		/* return the percentage of APU power with respect to APU's power limit.
+		 * percentage is reported, this isn't boost value. Smartshift power
+		 * boost/shift is only when the percentage is more than 100.
+		 */
+		if (metrics->StapmOriginalLimit > 0)
+			*value =  (metrics->ApuPower * 100) / metrics->StapmOriginalLimit;
+		else
+			*value = 0;
+		break;
+	case METRICS_SS_DGPU_SHARE:
+		/* return the percentage of dGPU power with respect to dGPU's power limit.
+		 * percentage is reported, this isn't boost value. Smartshift power
+		 * boost/shift is only when the percentage is more than 100.
+		 */
+		if ((metrics->dGpuPower > 0) &&
+		    (metrics->StapmCurrentLimit > metrics->StapmOriginalLimit))
+			*value = (metrics->dGpuPower * 100) /
+				  (metrics->StapmCurrentLimit - metrics->StapmOriginalLimit);
+		else
+			*value = 0;
+		break;
 	default:
 		*value = UINT_MAX;
 		break;
@@ -1251,6 +1273,18 @@ static int renoir_read_sensor(struct smu_context *smu,
 						  (uint32_t *)data);
 		*size = 4;
 		break;
+	case AMDGPU_PP_SENSOR_SS_APU_SHARE:
+		ret = renoir_get_smu_metrics_data(smu,
+						  METRICS_SS_APU_SHARE,
+						  (uint32_t *)data);
+		*size = 4;
+		break;
+	case AMDGPU_PP_SENSOR_SS_DGPU_SHARE:
+		ret = renoir_get_smu_metrics_data(smu,
+						  METRICS_SS_DGPU_SHARE,
+						  (uint32_t *)data);
+		*size = 4;
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;