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Message-ID: <1560750919-32255-1-git-send-email-lowry.li@arm.com>
Date: Mon, 17 Jun 2019 05:55:49 +0000
From: "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
To: Liviu Dudau <Liviu.Dudau@....com>,
"james qian wang (Arm Technology China)" <james.qian.wang@....com>,
"maarten.lankhorst@...ux.intel.com"
<maarten.lankhorst@...ux.intel.com>,
"seanpaul@...omium.org" <seanpaul@...omium.org>,
"airlied@...ux.ie" <airlied@...ux.ie>,
Brian Starkey <Brian.Starkey@....com>
CC: "Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
"Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
Ayan Halder <Ayan.Halder@....com>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
nd <nd@....com>
Subject: [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) <lowry.li@....com>
---
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 <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"
@@ -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 = &mdrv->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 komeda_drv *mdrv = dev_get_drvdata(dev);
+ struct drm_device *drm = &mdrv->kms->base;
+
+ dev_info(dev, "%s\n", __func__);
+ 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)
+ SET_RUNTIME_PM_OPS(komeda_rt_pm_suspend, komeda_rt_pm_resume, NULL)
+};
+
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,
},
};
--
1.9.1
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