drm/radeon: enable DPM by default on SUMO/PALM APUs

DPM seems to be stable on these asics and it drastically
improves performance depending on the boot clocks.

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

drivers/gpu/drm/radeon/radeon_pm.c

@@ -1249,9 +1249,6 @@ int radeon_pm_init(struct radeon_device *rdev)
 	case CHIP_JUNIPER:
 	case CHIP_CYPRESS:
 	case CHIP_HEMLOCK:
-	case CHIP_PALM:
-	case CHIP_SUMO:
-	case CHIP_SUMO2:
 	case CHIP_BARTS:
 	case CHIP_TURKS:
 	case CHIP_CAICOS:
@@ -1277,6 +1274,21 @@ int radeon_pm_init(struct radeon_device *rdev)
 		else
 			rdev->pm.pm_method = PM_METHOD_PROFILE;
 		break;
+	case CHIP_PALM:
+	case CHIP_SUMO:
+	case CHIP_SUMO2:
+		/* DPM requires the RLC, RV770+ dGPU requires SMC */
+		if (!rdev->rlc_fw)
+			rdev->pm.pm_method = PM_METHOD_PROFILE;
+		else if ((rdev->family >= CHIP_RV770) &&
+			 (!(rdev->flags & RADEON_IS_IGP)) &&
+			 (!rdev->smc_fw))
+			rdev->pm.pm_method = PM_METHOD_PROFILE;
+		else if (radeon_dpm == 0)
+			rdev->pm.pm_method = PM_METHOD_PROFILE;
+		else
+			rdev->pm.pm_method = PM_METHOD_DPM;
+		break;
 	default:
 		/* default to profile method */
 		rdev->pm.pm_method = PM_METHOD_PROFILE;