+#ifdef CONFIG_PM
+static int exynos_dsi_suspend(struct device *dev)
+{
+ struct drm_encoder *encoder = dev_get_drvdata(dev);
+ struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+ struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+ int ret, i;
+
+ usleep_range(10000, 20000);
+
+ if (dsi->state & DSIM_STATE_INITIALIZED) {
+ dsi->state &= ~DSIM_STATE_INITIALIZED;
+
+ exynos_dsi_disable_clock(dsi);
+
+ exynos_dsi_disable_irq(dsi);
+ }
+
+ dsi->state &= ~DSIM_STATE_CMD_LPM;
+
+ phy_power_off(dsi->phy);
+
+ for (i = driver_data->num_clks - 1; i > -1; i--)
+ clk_disable_unprepare(dsi->clks[i]);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+ if (ret < 0)
+ dev_err(dsi->dev, "cannot disable regulators %d\n", ret);
+
+ return 0;
+}
+
+static int exynos_dsi_resume(struct device *dev)
+{
+ struct drm_encoder *encoder = dev_get_drvdata(dev);
+ struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+ struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+ int ret, i;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+ if (ret < 0) {
+ dev_err(dsi->dev, "cannot enable regulators %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < driver_data->num_clks; i++) {
+ ret = clk_prepare_enable(dsi->clks[i]);
+ if (ret < 0)
+ goto err_clk;
+ }
+
+ ret = phy_power_on(dsi->phy);
+ if (ret < 0) {
+ dev_err(dsi->dev, "cannot enable phy %d\n", ret);
+ goto err_clk;
+ }
+
+ return 0;
+
+err_clk:
+ while (--i > -1)
+ clk_disable_unprepare(dsi->clks[i]);
+ regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops exynos_dsi_pm_ops = {
+ SET_RUNTIME_PM_OPS(exynos_dsi_suspend, exynos_dsi_resume, NULL)
+};
+