Re: [PATCH] drm/komeda: Add runtime_pm support
On Thursday, 12 December 2019 07:48:13 GMT james qian wang (Arm Technology
China) wrote:
> - 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)
>
> ---
> .../gpu/drm/arm/display/komeda/komeda_crtc.c | 3 +
> .../gpu/drm/arm/display/komeda/komeda_dev.c | 55 +--
> .../gpu/drm/arm/display/komeda/komeda_drv.c | 42 --
> .../gpu/drm/arm/display/komeda/komeda_kms.c | 6 --
> 4 files changed, 53 insertions(+), 53 deletions(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> index 1c452ea75999..56bd938961ee 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> @@ -5,6 +5,7 @@
> *
> */
> #include
> +#include
> #include
>
> #include
> @@ -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
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> index 38b832804bad..1d767473ba8a 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> @@ -10,6 +10,7 @@
> #include
> #include
> #include
> +#include
> #include
> #ifdef CONFIG_DEBUG_FS
> #include
> @@ -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(>kobj, _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) {
> - DRM_ERROR("connect iommu failed.\n");
> - goto disable_clk;
> - }
> - }
> -
> - ret = mdev->funcs->enable_irq(mdev);
> + mdev->funcs->enable_irq(mdev);
>
> -disable_clk:
> - clk_disable_unprepare(mdev->aclk);
> + if (mdev->iommu && mdev->funcs->connect_iommu)
> + if (mdev->funcs->connect_iommu(mdev))
> + DRM_ERROR("connect iommu failed.\n");
>
> - 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");
> -
[PATCH] drm/komeda: Add runtime_pm support
- 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)
---
.../gpu/drm/arm/display/komeda/komeda_crtc.c | 3 +
.../gpu/drm/arm/display/komeda/komeda_dev.c | 55 +--
.../gpu/drm/arm/display/komeda/komeda_drv.c | 42 --
.../gpu/drm/arm/display/komeda/komeda_kms.c | 6 --
4 files changed, 53 insertions(+), 53 deletions(-)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 1c452ea75999..56bd938961ee 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -5,6 +5,7 @@
*
*/
#include
+#include
#include
#include
@@ -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
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
index 38b832804bad..1d767473ba8a 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -10,6 +10,7 @@
#include
#include
#include
+#include
#include
#ifdef CONFIG_DEBUG_FS
#include
@@ -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(>kobj, _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) {
- DRM_ERROR("connect iommu failed.\n");
- goto disable_clk;
- }
- }
-
- ret = mdev->funcs->enable_irq(mdev);
+ mdev->funcs->enable_irq(mdev);
-disable_clk:
- clk_disable_unprepare(mdev->aclk);
+ if (mdev->iommu && mdev->funcs->connect_iommu)
+ if (mdev->funcs->connect_iommu(mdev))
+ DRM_ERROR("connect iommu failed.\n");
- 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;
}
diff --git
