On Mon, Sep 23, 2019 at 01:59:25AM +0000, Lowry Li (Arm Technology China) wrote: > From: "Lowry Li (Arm Technology China)" <Lowry.Li@xxxxxxx> > > Adds system power management support in KMS kernel driver. > > Depends on: > https://patchwork.freedesktop.org/series/62377/ > > Changes since v1: > Since we have unified mclk/pclk/pipeline->aclk to one mclk, which will > be turned on/off when crtc atomic enable/disable, removed runtime power > management. > Removes run time get/put related flow. > Adds to disable the aclk when register access finished. > > Changes since v2: > Rebases to the drm-misc-next branch. > > Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@xxxxxxx> Looks good to me. Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@xxxxxxx> will push it to drm-misc-next. > --- > .../gpu/drm/arm/display/komeda/komeda_crtc.c | 1 - > .../gpu/drm/arm/display/komeda/komeda_dev.c | 65 +++++++++++++++++-- > .../gpu/drm/arm/display/komeda/komeda_dev.h | 3 + > .../gpu/drm/arm/display/komeda/komeda_drv.c | 30 ++++++++- > 4 files changed, 91 insertions(+), 8 deletions(-) > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > index 38d5cb20e908..b47c0dabd0d1 100644 > --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > @@ -5,7 +5,6 @@ > * > */ > #include <linux/clk.h> > -#include <linux/pm_runtime.h> > #include <linux/spinlock.h> > > #include <drm/drm_atomic.h> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c > index bee4633cdd9f..8a03324f02a5 100644 > --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c > @@ -258,7 +258,7 @@ struct komeda_dev *komeda_dev_create(struct device *dev) > product->product_id, > MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id)); > err = -ENODEV; > - goto err_cleanup; > + goto disable_clk; > } > > DRM_INFO("Found ARM Mali-D%x version r%dp%d\n", > @@ -271,19 +271,19 @@ struct komeda_dev *komeda_dev_create(struct device *dev) > err = mdev->funcs->enum_resources(mdev); > if (err) { > DRM_ERROR("enumerate display resource failed.\n"); > - goto err_cleanup; > + goto disable_clk; > } > > err = komeda_parse_dt(dev, mdev); > if (err) { > DRM_ERROR("parse device tree failed.\n"); > - goto err_cleanup; > + goto disable_clk; > } > > err = komeda_assemble_pipelines(mdev); > if (err) { > DRM_ERROR("assemble display pipelines failed.\n"); > - goto err_cleanup; > + goto disable_clk; > } > > dev->dma_parms = &mdev->dma_parms; > @@ -296,11 +296,14 @@ struct komeda_dev *komeda_dev_create(struct device *dev) > if (mdev->iommu && mdev->funcs->connect_iommu) { > err = mdev->funcs->connect_iommu(mdev); > if (err) { > + DRM_ERROR("connect iommu failed.\n"); > mdev->iommu = NULL; > - goto err_cleanup; > + goto disable_clk; > } > } > > + clk_disable_unprepare(mdev->aclk); > + > err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); > if (err) { > DRM_ERROR("create sysfs group failed.\n"); > @@ -313,6 +316,8 @@ struct komeda_dev *komeda_dev_create(struct device *dev) > > return mdev; > > +disable_clk: > + clk_disable_unprepare(mdev->aclk); > err_cleanup: > komeda_dev_destroy(mdev); > return ERR_PTR(err); > @@ -330,8 +335,12 @@ void komeda_dev_destroy(struct komeda_dev *mdev) > debugfs_remove_recursive(mdev->debugfs_root); > #endif > > + if (mdev->aclk) > + clk_prepare_enable(mdev->aclk); > + > if (mdev->iommu && mdev->funcs->disconnect_iommu) > - mdev->funcs->disconnect_iommu(mdev); > + if (mdev->funcs->disconnect_iommu(mdev)) > + DRM_ERROR("disconnect iommu failed.\n"); > mdev->iommu = NULL; > > for (i = 0; i < mdev->n_pipelines; i++) { > @@ -359,3 +368,47 @@ void komeda_dev_destroy(struct komeda_dev *mdev) > > devm_kfree(dev, mdev); > } > + > +int komeda_dev_resume(struct komeda_dev *mdev) > +{ > + int ret = 0; > + > + clk_prepare_enable(mdev->aclk); > + > + if (mdev->iommu && mdev->funcs->connect_iommu) { > + ret = mdev->funcs->connect_iommu(mdev); > + if (ret < 0) { > + DRM_ERROR("connect iommu failed.\n"); > + goto disable_clk; > + } > + } > + > + ret = mdev->funcs->enable_irq(mdev); > + > +disable_clk: > + clk_disable_unprepare(mdev->aclk); > + > + return ret; > +} > + > +int komeda_dev_suspend(struct komeda_dev *mdev) > +{ > + int ret = 0; > + > + clk_prepare_enable(mdev->aclk); > + > + if (mdev->iommu && mdev->funcs->disconnect_iommu) { > + ret = mdev->funcs->disconnect_iommu(mdev); > + if (ret < 0) { > + DRM_ERROR("disconnect iommu failed.\n"); > + goto disable_clk; > + } > + } > + > + ret = mdev->funcs->disable_irq(mdev); > + > +disable_clk: > + clk_disable_unprepare(mdev->aclk); > + > + return ret; > +} > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h > index 8acf8c0601cc..414200233b64 100644 > --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h > @@ -224,4 +224,7 @@ void komeda_print_events(struct komeda_events *evts); > static inline void komeda_print_events(struct komeda_events *evts) {} > #endif > > +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 69ace6f9055d..d6c2222c5d33 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" > @@ -136,13 +137,40 @@ static const struct of_device_id komeda_of_match[] = { > > MODULE_DEVICE_TABLE(of, komeda_of_match); > > +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; > + > + 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; > + > + 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) > +}; > + > 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, > }, > }; > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
