Adds runtime and system power management support in KMS kernel driver. Depends on: - https://patchwork.freedesktop.org/series/61650/ - https://patchwork.freedesktop.org/series/60083/ Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@xxxxxxx> --- drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 2 + drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 30 +++++++++++++ drivers/gpu/drm/arm/display/komeda/komeda_dev.h | 2 + drivers/gpu/drm/arm/display/komeda/komeda_drv.c | 54 ++++++++++++++++++++++-- 4 files changed, 85 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c index 66c5e0d..1b4ea8a 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c @@ -257,6 +257,7 @@ void komeda_crtc_handle_event(struct komeda_crtc *kcrtc, komeda_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_crtc_state *old) { + pm_runtime_get_sync(crtc->dev->dev); komeda_crtc_prepare(to_kcrtc(crtc)); drm_crtc_vblank_on(crtc); komeda_crtc_do_flush(crtc, old); @@ -330,6 +331,7 @@ void komeda_crtc_handle_event(struct komeda_crtc *kcrtc, drm_crtc_vblank_off(crtc); komeda_crtc_unprepare(kcrtc); + pm_runtime_put(crtc->dev->dev); } static void diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c index 405c64d..edd0943 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c @@ -308,3 +308,33 @@ void komeda_dev_destroy(struct komeda_dev *mdev) devm_kfree(dev, mdev); } + +int komeda_dev_resume(struct komeda_dev *mdev) +{ + int ret = 0; + + if (mdev->iommu && mdev->funcs->connect_iommu) { + ret = mdev->funcs->connect_iommu(mdev); + if (ret < 0) { + DRM_ERROR("connect iommu failed.\n"); + return ret; + } + } + + return mdev->funcs->enable_irq(mdev); +} + +int komeda_dev_suspend(struct komeda_dev *mdev) +{ + int ret = 0; + + if (mdev->iommu && mdev->funcs->disconnect_iommu) { + ret = mdev->funcs->disconnect_iommu(mdev); + if (ret < 0) { + DRM_ERROR("disconnect iommu failed.\n"); + return ret; + } + } + + return mdev->funcs->disable_irq(mdev); +} diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h index d1c86b6..096f9f7 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h @@ -207,4 +207,6 @@ struct komeda_dev { struct komeda_dev *dev_to_mdev(struct device *dev); +int komeda_dev_resume(struct komeda_dev *mdev); +int komeda_dev_suspend(struct komeda_dev *mdev); #endif /*_KOMEDA_DEV_H_*/ diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c index cfa5068..aa4cef1 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c @@ -8,6 +8,7 @@ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/component.h> +#include <linux/pm_runtime.h> #include <drm/drm_of.h> #include "komeda_dev.h" #include "komeda_kms.h" @@ -32,6 +33,9 @@ static void komeda_unbind(struct device *dev) return; komeda_kms_detach(mdrv->kms); + + pm_runtime_disable(dev); + komeda_dev_destroy(mdrv->mdev); dev_set_drvdata(dev, NULL); @@ -52,6 +56,9 @@ static int komeda_bind(struct device *dev) err = PTR_ERR(mdrv->mdev); goto free_mdrv; } + dev_set_drvdata(dev, mdrv); + + pm_runtime_enable(dev); mdrv->kms = komeda_kms_attach(mdrv->mdev); if (IS_ERR(mdrv->kms)) { @@ -59,11 +66,10 @@ static int komeda_bind(struct device *dev) goto destroy_mdev; } - dev_set_drvdata(dev, mdrv); - return 0; destroy_mdev: + pm_runtime_disable(dev); komeda_dev_destroy(mdrv->mdev); free_mdrv: @@ -134,13 +140,55 @@ static int komeda_platform_remove(struct platform_device *pdev) MODULE_DEVICE_TABLE(of, komeda_of_match); +static int komeda_rt_pm_suspend(struct device *dev) +{ + dev_info(dev, "%s\n", __func__); + return 0; +} + +static int komeda_rt_pm_resume(struct device *dev) +{ + dev_info(dev, "%s\n", __func__); + return 0; +} + +static int __maybe_unused komeda_pm_suspend(struct device *dev) +{ + struct komeda_drv *mdrv = dev_get_drvdata(dev); + struct drm_device *drm = &mdrv->kms->base; + int res; + + dev_info(dev, "%s\n", __func__); + res = drm_mode_config_helper_suspend(drm); + + komeda_dev_suspend(mdrv->mdev); + + return res; +} + +static int __maybe_unused komeda_pm_resume(struct device *dev) +{ + struct komeda_drv *mdrv = dev_get_drvdata(dev); + struct drm_device *drm = &mdrv->kms->base; + + dev_info(dev, "%s\n", __func__); + komeda_dev_resume(mdrv->mdev); + + return drm_mode_config_helper_resume(drm); +} + +static const struct dev_pm_ops komeda_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(komeda_pm_suspend, komeda_pm_resume) + SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL) +}; + static struct platform_driver komeda_platform_driver = { .probe = komeda_platform_probe, .remove = komeda_platform_remove, .driver = { .name = "komeda", .of_match_table = komeda_of_match, - .pm = NULL, + .pm = &komeda_pm_ops, }, }; -- 1.9.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
