nv-tegra-mirror/linux-nvgpu
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nvgpu.git synced 2025-12-24 10:34:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

gpu: nvgpu: enable runtime pm for pci

Browse Source 
Enable runtime power management ops for PCIe devices, and
move gk20a_pm_finalize_poweron call into the resume routine.
This change only implements suspend as a stub, as suspend/resume
has not yet been verified for dGPU

Bug 1785512
Bug 200187507

Change-Id: I076bafc03c6b4ba10dce874804ed3fd0b9c7b0d8
Signed-off-by: Sachit Kadle <skadle@nvidia.com>
Reviewed-on: http://git-master/r/1179860
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
This commit is contained in:
Sachit Kadle
2016-07-12 14:27:32 -07:00
committed by Vijayakumar Subbu
parent b486d3535d
commit a2831f098b
1 changed files with 50 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/gpu/nvgpu/pci.c
View File

@@ -38,25 +38,15 @@ static bool nvgpu_pci_tegra_is_railgated(struct device *pdev)
return false;
}
static int nvgpu_pci_busy(struct device *dev)
{
struct gk20a *g = get_gk20a(dev);
int err = 0;
if (!g->power_on)
err = gk20a_pm_finalize_poweron(dev);
return err;
}
static struct gk20a_platform nvgpu_pci_device = {
/* ptimer src frequency in hz */
.ptimer_src_freq = 31250000,
.probe = nvgpu_pci_tegra_probe,
.remove = nvgpu_pci_tegra_remove,
.busy = nvgpu_pci_busy,
/* power management configuration */
.railgate_delay = 500,
.can_elpg = false,
/* power management callbacks */
@@ -148,6 +138,45 @@ static struct class nvgpu_pci_class = {
.devnode = nvgpu_pci_devnode,
};
#ifdef CONFIG_PM
static int nvgpu_pci_pm_runtime_resume(struct device *dev)
{
return gk20a_pm_finalize_poweron(dev);
}
static int nvgpu_pci_pm_runtime_suspend(struct device *dev)
{
return 0;
}
static const struct dev_pm_ops nvgpu_pci_pm_ops = {
.runtime_resume = nvgpu_pci_pm_runtime_resume,
.runtime_suspend = nvgpu_pci_pm_runtime_suspend,
.resume = nvgpu_pci_pm_runtime_resume,
.suspend = nvgpu_pci_pm_runtime_suspend,
};
#endif
int nvgpu_pci_pm_init(struct device *dev)
{
#ifdef CONFIG_PM
struct gk20a_platform *platform = gk20a_get_platform(dev);
if (platform->railgate_delay)
pm_runtime_set_autosuspend_delay(dev,
platform->railgate_delay);
/*
* Runtime PM for PCI devices is disabled by default,
* so we need to enable it first
*/
pm_runtime_use_autosuspend(dev);
pm_runtime_put_noidle(dev);
pm_runtime_allow(dev);
#endif
return 0;
}
static int nvgpu_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pent)
{
@@ -252,6 +281,12 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
gk20a_init_gr(g);
err = nvgpu_pci_pm_init(&pdev->dev);
if (err) {
gk20a_err(&pdev->dev, "pm init failed");
return err;
}
return 0;
}
@@ -281,6 +316,9 @@ static struct pci_driver nvgpu_pci_driver = {
.id_table = nvgpu_pci_table,
.probe = nvgpu_pci_probe,
.remove = nvgpu_pci_remove,
#ifdef CONFIG_PM
.driver.pm = &nvgpu_pci_pm_ops,
#endif
};
int __init nvgpu_pci_init(void)