Re: [PATCH] drm/komeda: Adds power management support
On Tue, Oct 8, 2019 at 1:47 PM Sean Paul wrote:
>
> On Mon, Sep 23, 2019 at 01:59:25AM +, Lowry Li (Arm Technology China)
> wrote:
> > From: "Lowry Li (Arm Technology China)"
> >
> > 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)
> > ---
> > .../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
> > -#include
> > #include
> >
> > #include
> > 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 = >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(>kobj, _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);
> > +
Re: [PATCH] drm/komeda: Adds power management support
On Mon, Sep 23, 2019 at 01:59:25AM +, Lowry Li (Arm Technology China) wrote:
> From: "Lowry Li (Arm Technology China)"
>
> 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)
> ---
> .../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
> -#include
> #include
>
> #include
> 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 = >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(>kobj, _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 =
[PATCH] drm/komeda: Adds power management support
From: "Lowry Li (Arm Technology China)"
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)
---
.../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
-#include
#include
#include
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 = >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(>kobj, _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);
[PATCH] drm/komeda: Adds power management support
From: "Lowry Li (Arm Technology China)"
Adds system power management support in KMS kernel driver.
Depends on:
- https://patchwork.freedesktop.org/series/61650/
- https://patchwork.freedesktop.org/series/60083/
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.
Signed-off-by: Lowry Li (Arm Technology China)
---
drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 1 -
drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 65 +---
drivers/gpu/drm/arm/display/komeda/komeda_dev.h | 2 +
drivers/gpu/drm/arm/display/komeda/komeda_drv.c | 30 ++-
4 files changed, 90 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 cafb445..d14e7f3 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
-#include
#include
#include
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
index e1aa58e..a82f67b 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -209,7 +209,7 @@ 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",
@@ -222,19 +222,19 @@ 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 = >dma_parms;
@@ -247,11 +247,14 @@ 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(>kobj, _sysfs_attr_group);
if (err) {
DRM_ERROR("create sysfs group failed.\n");
@@ -264,6 +267,8 @@ 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);
@@ -281,8 +286,12 @@ 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++) {
@@ -308,3 +317,47 @@ 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);
+
Re: [PATCH] drm/komeda: Adds power management support
Hi Liviu,
On Thu, Jun 20, 2019 at 12:15:22AM +0800, Liviu Dudau wrote:
> Hi Lowry,
>
> On Mon, Jun 17, 2019 at 06:55:49AM +0100, Lowry Li (Arm Technology China)
> wrote:
> > 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)
> > ---
> > 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
> > #include
> > #include
> > +#include
> > #include
> > #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
Re: [PATCH] drm/komeda: Adds power management support
Hi Lowry,
On Mon, Jun 17, 2019 at 06:55:49AM +0100, Lowry Li (Arm Technology China) wrote:
> 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)
> ---
> 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
> #include
> #include
> +#include
> #include
> #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;
> +}
Useful only for debugging? I think you've missed an opportunity here to turn
off clocks and disable interrupts.
> +
> +static int
[PATCH] drm/komeda: Adds power management support
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)
---
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
#include
#include
+#include
#include
#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 = >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
