media: qcom: camss: implement pm domain ops for VFE v4.1

MSM8917 and MSM8953 have multiple VFE power-domains they
have to be powered on/off explicitly.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

drivers/media/platform/qcom/camss/camss-vfe-4-1.c

@@ -938,7 +938,10 @@ static irqreturn_t vfe_isr(int irq, void *dev)
  */
 static void vfe_4_1_pm_domain_off(struct vfe_device *vfe)
 {
-	/* nop */
+	if (!vfe->res->has_pd)
+		return;
+
+	vfe_pm_domain_off(vfe);
 }
 
 /*
@@ -947,7 +950,10 @@ static void vfe_4_1_pm_domain_off(struct vfe_device *vfe)
  */
 static int vfe_4_1_pm_domain_on(struct vfe_device *vfe)
 {
-	return 0;
+	if (!vfe->res->has_pd)
+		return 0;
+
+	return vfe_pm_domain_on(vfe);
 }
 
 static const struct vfe_hw_ops_gen1 vfe_ops_gen1_4_1 = {