On Tue, Oct 8, 2019 at 1:47 PM Sean Paul sean@poorly.run wrote:
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
.../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);Just noticed this while prepping the -misc pull request.
You should use the atomic helpers instead, drm_atomic_helper_suspend and drm_atomic_helper_resume.
Hmm, looks like I was mistaken. For some reason, I thought this was legacy but looking into mode_config_helper_suspend(), that will gets you kms_helper_poll_disable/enable as well as stashes the state in mode_config. So less work is better :)
Sean
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, },};
-- 2.17.1
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-- Sean Paul, Software Engineer, Google / Chromium OS