On Mon, Sep 23, 2019 at 01:59:25AM +0000, Lowry Li (Arm Technology China) wrote:
From: "Lowry Li (Arm Technology China)" Lowry.Li@arm.com
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@arm.com
Looks good to me.
Reviewed-by: James Qian Wang (Arm Technology China) james.qian.wang@arm.com
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,};