From: Gustavo Padovan gustavo.padovan@collabora.co.uk
Let pm_runtime handle the enabling/disabling of the device with proper refcnt instead of rely on specific flags to track the enabled state.
Changelog v2: - no change
Signed-off-by: Gustavo Padovan gustavo.padovan@collabora.co.uk Signed-off-by: Inki Dae inki.dae@samsung.com --- drivers/gpu/drm/exynos/exynos_dp_core.c | 58 ++++++++++++++++++++++++++------- 1 file changed, 46 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c index e4d32a1..b6e8b89 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_core.c +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c @@ -1058,8 +1058,7 @@ static void exynos_dp_bridge_enable(struct drm_bridge *bridge) struct exynos_dp_device *dp = bridge->driver_private; struct exynos_drm_crtc *crtc = dp_to_crtc(dp);
- if (dp->dpms_mode == DRM_MODE_DPMS_ON) - return; + pm_runtime_get_sync(dp->dev);
if (dp->panel) { if (drm_panel_prepare(dp->panel)) { @@ -1071,13 +1070,10 @@ static void exynos_dp_bridge_enable(struct drm_bridge *bridge) if (crtc->ops->clock_enable) crtc->ops->clock_enable(dp_to_crtc(dp), true);
- clk_prepare_enable(dp->clock); phy_power_on(dp->phy); exynos_dp_init_dp(dp); enable_irq(dp->irq); exynos_dp_commit(&dp->encoder); - - dp->dpms_mode = DRM_MODE_DPMS_ON; }
static void exynos_dp_bridge_disable(struct drm_bridge *bridge) @@ -1085,9 +1081,6 @@ static void exynos_dp_bridge_disable(struct drm_bridge *bridge) struct exynos_dp_device *dp = bridge->driver_private; struct exynos_drm_crtc *crtc = dp_to_crtc(dp);
- if (dp->dpms_mode != DRM_MODE_DPMS_ON) - return; - if (dp->panel) { if (drm_panel_disable(dp->panel)) { DRM_ERROR("failed to disable the panel\n"); @@ -1098,7 +1091,6 @@ static void exynos_dp_bridge_disable(struct drm_bridge *bridge) disable_irq(dp->irq); flush_work(&dp->hotplug_work); phy_power_off(dp->phy); - clk_disable_unprepare(dp->clock);
if (crtc->ops->clock_enable) crtc->ops->clock_enable(dp_to_crtc(dp), false); @@ -1108,7 +1100,7 @@ static void exynos_dp_bridge_disable(struct drm_bridge *bridge) DRM_ERROR("failed to turnoff the panel\n"); }
- dp->dpms_mode = DRM_MODE_DPMS_OFF; + pm_runtime_put_sync(dp->dev); }
static void exynos_dp_bridge_nop(struct drm_bridge *bridge) @@ -1267,7 +1259,6 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data) int pipe, ret = 0;
dp->dev = &pdev->dev; - dp->dpms_mode = DRM_MODE_DPMS_OFF;
dp->video_info = exynos_dp_dt_parse_pdata(&pdev->dev); if (IS_ERR(dp->video_info)) @@ -1392,6 +1383,7 @@ static int exynos_dp_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *panel_node, *bridge_node, *endpoint; struct exynos_dp_device *dp; + int ret;
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device), GFP_KERNEL); @@ -1420,16 +1412,57 @@ static int exynos_dp_probe(struct platform_device *pdev) return -EPROBE_DEFER; }
- return component_add(&pdev->dev, &exynos_dp_ops); + pm_runtime_enable(dev); + + ret = component_add(&pdev->dev, &exynos_dp_ops); + if (ret) + goto err_disable_pm_runtime; + + return ret; + +err_disable_pm_runtime: + pm_runtime_disable(dev); + + return ret; }
static int exynos_dp_remove(struct platform_device *pdev) { + pm_runtime_disable(&pdev->dev); component_del(&pdev->dev, &exynos_dp_ops);
return 0; }
+#ifdef CONFIG_PM +static int exynos_dp_suspend(struct device *dev) +{ + struct exynos_dp_device *dp = dev_get_drvdata(dev); + + clk_disable_unprepare(dp->clock); + + return 0; +} + +static int exynos_dp_resume(struct device *dev) +{ + struct exynos_dp_device *dp = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(dp->clock); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret); + return ret; + } + + return 0; +} +#endif + +static const struct dev_pm_ops exynos_dp_pm_ops = { + SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL) +}; + static const struct of_device_id exynos_dp_match[] = { { .compatible = "samsung,exynos5-dp" }, {}, @@ -1442,6 +1475,7 @@ struct platform_driver dp_driver = { .driver = { .name = "exynos-dp", .owner = THIS_MODULE, + .pm = &exynos_dp_pm_ops, .of_match_table = exynos_dp_match, }, };