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path: root/drivers/gpu/drm/exynos/exynos_drm_dsi.c
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_dsi.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_dsi.c151
1 files changed, 83 insertions, 68 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 0a99160afaaa..bc09bba3132a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1458,66 +1458,6 @@ static const struct mipi_dsi_host_ops exynos_dsi_ops = {
.transfer = exynos_dsi_host_transfer,
};
-static int exynos_dsi_poweron(struct exynos_dsi *dsi)
-{
- 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;
-}
-
-static void exynos_dsi_poweroff(struct exynos_dsi *dsi)
-{
- 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);
-}
-
static void exynos_dsi_enable(struct drm_encoder *encoder)
{
struct exynos_dsi *dsi = encoder_to_dsi(encoder);
@@ -1526,16 +1466,14 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
if (dsi->state & DSIM_STATE_ENABLED)
return;
- ret = exynos_dsi_poweron(dsi);
- if (ret < 0)
- return;
+ pm_runtime_get_sync(dsi->dev);
dsi->state |= DSIM_STATE_ENABLED;
ret = drm_panel_prepare(dsi->panel);
if (ret < 0) {
dsi->state &= ~DSIM_STATE_ENABLED;
- exynos_dsi_poweroff(dsi);
+ pm_runtime_put_sync(dsi->dev);
return;
}
@@ -1547,7 +1485,7 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
dsi->state &= ~DSIM_STATE_ENABLED;
exynos_dsi_set_display_enable(dsi, false);
drm_panel_unprepare(dsi->panel);
- exynos_dsi_poweroff(dsi);
+ pm_runtime_put_sync(dsi->dev);
return;
}
@@ -1569,7 +1507,7 @@ static void exynos_dsi_disable(struct drm_encoder *encoder)
dsi->state &= ~DSIM_STATE_ENABLED;
- exynos_dsi_poweroff(dsi);
+ pm_runtime_put_sync(dsi->dev);
}
static enum drm_connector_status
@@ -1797,13 +1735,13 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
ep = of_graph_get_next_endpoint(node, NULL);
if (!ep) {
- ret = -ENXIO;
+ ret = -EINVAL;
goto end;
}
dsi->bridge_node = of_graph_get_remote_port_parent(ep);
if (!dsi->bridge_node) {
- ret = -ENXIO;
+ ret = -EINVAL;
goto end;
}
end:
@@ -1954,22 +1892,99 @@ static int exynos_dsi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &dsi->encoder);
+ pm_runtime_enable(dev);
+
return component_add(dev, &exynos_dsi_component_ops);
}
static int exynos_dsi_remove(struct platform_device *pdev)
{
+ pm_runtime_disable(&pdev->dev);
+
component_del(&pdev->dev, &exynos_dsi_component_ops);
return 0;
}
+#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)
+};
+
struct platform_driver dsi_driver = {
.probe = exynos_dsi_probe,
.remove = exynos_dsi_remove,
.driver = {
.name = "exynos-dsi",
.owner = THIS_MODULE,
+ .pm = &exynos_dsi_pm_ops,
.of_match_table = exynos_dsi_of_match,
},
};