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drm/komeda: Add runtime_pm support

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- Add pm_runtime_get/put to crtc_enable/disable along with the real
  display usage
- Add runtime_get/put to register_show, since register_show() will
  access register, need to wakeup HW.
- For the case that PM is not enabled or configured, manually wakeup HW

Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191212074756.14678-1-james.qian.wang@arm.com
This commit is contained in:
james qian wang (Arm Technology China) 2019-12-12 07:48:13 +00:00
parent 8f902dbd6e
commit efb4650885
4 changed files with 53 additions and 53 deletions
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3
drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
View File

@ -5,6 +5,7 @@
*
*/
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/spinlock.h>
#include <drm/drm_atomic.h>
@ -274,6 +275,7 @@ static void
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);
WARN_ON(drm_crtc_vblank_get(crtc));
@ -372,6 +374,7 @@ komeda_crtc_atomic_disable(struct drm_crtc *crtc,
drm_crtc_vblank_put(crtc);
drm_crtc_vblank_off(crtc);
komeda_crtc_unprepare(kcrtc);
pm_runtime_put(crtc->dev->dev);
}
static void

55
drivers/gpu/drm/arm/display/komeda/komeda_dev.c
View File

@ -10,6 +10,7 @@
#include <linux/of_graph.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
@ -27,12 +28,16 @@ static int komeda_register_show(struct seq_file *sf, void *x)
seq_puts(sf, "\n====== Komeda register dump =========\n");
pm_runtime_get_sync(mdev->dev);
if (mdev->funcs->dump_register)
mdev->funcs->dump_register(mdev, sf);
for (i = 0; i < mdev->n_pipelines; i++)
komeda_pipeline_dump_register(mdev->pipelines[i], sf);
pm_runtime_put(mdev->dev);
return 0;
}
@ -263,15 +268,6 @@ struct komeda_dev *komeda_dev_create(struct device *dev)
if (!mdev->iommu)
DRM_INFO("continue without IOMMU support!\n");
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 disable_clk;
}
}
clk_disable_unprepare(mdev->aclk);
err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
@ -310,11 +306,6 @@ void komeda_dev_destroy(struct komeda_dev *mdev)
if (mdev->aclk)
clk_prepare_enable(mdev->aclk);
if (mdev->iommu && mdev->funcs->disconnect_iommu)
if (mdev->funcs->disconnect_iommu(mdev))
DRM_ERROR("disconnect iommu failed.\n");
mdev->iommu = NULL;
for (i = 0; i < mdev->n_pipelines; i++) {
komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
mdev->pipelines[i] = NULL;
@ -343,44 +334,26 @@ void komeda_dev_destroy(struct komeda_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) {
mdev->funcs->enable_irq(mdev);
if (mdev->iommu && mdev->funcs->connect_iommu)
if (mdev->funcs->connect_iommu(mdev))
DRM_ERROR("connect iommu failed.\n");
goto disable_clk;
}
}
ret = mdev->funcs->enable_irq(mdev);
disable_clk:
clk_disable_unprepare(mdev->aclk);
return ret;
return 0;
}
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) {
if (mdev->iommu && mdev->funcs->disconnect_iommu)
if (mdev->funcs->disconnect_iommu(mdev))
DRM_ERROR("disconnect iommu failed.\n");
goto disable_clk;
}
}
ret = mdev->funcs->disable_irq(mdev);
mdev->funcs->disable_irq(mdev);
disable_clk:
clk_disable_unprepare(mdev->aclk);
return ret;
return 0;
}

42
drivers/gpu/drm/arm/display/komeda/komeda_drv.c
View File

@ -33,6 +33,12 @@ static void komeda_unbind(struct device *dev)
return;
komeda_kms_detach(mdrv->kms);
if (pm_runtime_enabled(dev))
pm_runtime_disable(dev);
else
komeda_dev_suspend(mdrv->mdev);
komeda_dev_destroy(mdrv->mdev);
dev_set_drvdata(dev, NULL);
@ -54,6 +60,10 @@ static int komeda_bind(struct device *dev)
goto free_mdrv;
}
pm_runtime_enable(dev);
if (!pm_runtime_enabled(dev))
komeda_dev_resume(mdrv->mdev);
mdrv->kms = komeda_kms_attach(mdrv->mdev);
if (IS_ERR(mdrv->kms)) {
err = PTR_ERR(mdrv->kms);
@ -65,6 +75,11 @@ static int komeda_bind(struct device *dev)
return 0;
destroy_mdev:
if (pm_runtime_enabled(dev))
pm_runtime_disable(dev);
else
komeda_dev_suspend(mdrv->mdev);
komeda_dev_destroy(mdrv->mdev);
free_mdrv:
@ -131,15 +146,29 @@ static const struct of_device_id komeda_of_match[] = {
MODULE_DEVICE_TABLE(of, komeda_of_match);
static int komeda_rt_pm_suspend(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
return komeda_dev_suspend(mdrv->mdev);
}
static int komeda_rt_pm_resume(struct device *dev)
{
struct komeda_drv *mdrv = dev_get_drvdata(dev);
return komeda_dev_resume(mdrv->mdev);
}
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);
res = drm_mode_config_helper_suspend(&mdrv->kms->base);
komeda_dev_suspend(mdrv->mdev);
if (!pm_runtime_status_suspended(dev))
komeda_dev_suspend(mdrv->mdev);
return res;
}
@ -147,15 +176,16 @@ static int __maybe_unused komeda_pm_suspend(struct device *dev)
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);
if (!pm_runtime_status_suspended(dev))
komeda_dev_resume(mdrv->mdev);
return drm_mode_config_helper_resume(drm);
return drm_mode_config_helper_resume(&mdrv->kms->base);
}
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 = {

6
drivers/gpu/drm/arm/display/komeda/komeda_kms.c
View File

@ -307,10 +307,6 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
if (err)
goto free_component_binding;
err = mdev->funcs->enable_irq(mdev);
if (err)
goto free_component_binding;
drm->irq_enabled = true;
drm_kms_helper_poll_init(drm);
@ -324,7 +320,6 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
free_interrupts:
drm_kms_helper_poll_fini(drm);
drm->irq_enabled = false;
mdev->funcs->disable_irq(mdev);
free_component_binding:
component_unbind_all(mdev->dev, drm);
cleanup_mode_config:
@ -346,7 +341,6 @@ void komeda_kms_detach(struct komeda_kms_dev *kms)
drm_kms_helper_poll_fini(drm);
drm_atomic_helper_shutdown(drm);
drm->irq_enabled = false;
mdev->funcs->disable_irq(mdev);
component_unbind_all(mdev->dev, drm);
drm_mode_config_cleanup(drm);
komeda_kms_cleanup_private_objs(kms);