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authorVaibhav Gupta <vaibhavgupta40@gmail.com>2020-07-17 10:34:36 +0300
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-07-19 15:24:57 +0300
commit68e966a3796ed69314ed106a4cea891a4dec48f6 (patch)
tree511fd7270e4072b85d377a4eda4dbf0dfffc0016 /drivers/media
parent9c4a8489ab7c29f46beedc5c288a2eacb431c229 (diff)
downloadlinux-68e966a3796ed69314ed106a4cea891a4dec48f6.tar.xz
media: tw68: use generic power management
With legacy PM, drivers themselves were responsible for managing the device's power states and takes care of register states. After upgrading to the generic structure, PCI core will take care of required tasks and drivers should do only device-specific operations. The driver was invoking PCI helper functions like pci_save/restore_state() which is not recommended. Compile-Tested only. Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/pci/tw68/tw68-core.c30
1 files changed, 11 insertions, 19 deletions
diff --git a/drivers/media/pci/tw68/tw68-core.c b/drivers/media/pci/tw68/tw68-core.c
index 30c1ea87f0e8..bf15fa7c0ea1 100644
--- a/drivers/media/pci/tw68/tw68-core.c
+++ b/drivers/media/pci/tw68/tw68-core.c
@@ -359,10 +359,9 @@ static void tw68_finidev(struct pci_dev *pci_dev)
v4l2_device_unregister(&dev->v4l2_dev);
}
-#ifdef CONFIG_PM
-
-static int tw68_suspend(struct pci_dev *pci_dev , pm_message_t state)
+static int __maybe_unused tw68_suspend(struct device *dev_d)
{
+ struct pci_dev *pci_dev = to_pci_dev(dev_d);
struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
struct tw68_dev *dev = container_of(v4l2_dev,
struct tw68_dev, v4l2_dev);
@@ -373,24 +372,19 @@ static int tw68_suspend(struct pci_dev *pci_dev , pm_message_t state)
synchronize_irq(pci_dev->irq);
- pci_save_state(pci_dev);
- pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
vb2_discard_done(&dev->vidq);
return 0;
}
-static int tw68_resume(struct pci_dev *pci_dev)
+static int __maybe_unused tw68_resume(struct device *dev_d)
{
- struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d);
struct tw68_dev *dev = container_of(v4l2_dev,
struct tw68_dev, v4l2_dev);
struct tw68_buf *buf;
unsigned long flags;
- pci_set_power_state(pci_dev, PCI_D0);
- pci_restore_state(pci_dev);
-
/* Do things that are done in tw68_initdev ,
except of initializing memory structures.*/
@@ -408,19 +402,17 @@ static int tw68_resume(struct pci_dev *pci_dev)
return 0;
}
-#endif
/* ----------------------------------------------------------- */
+static SIMPLE_DEV_PM_OPS(tw68_pm_ops, tw68_suspend, tw68_resume);
+
static struct pci_driver tw68_pci_driver = {
- .name = "tw68",
- .id_table = tw68_pci_tbl,
- .probe = tw68_initdev,
- .remove = tw68_finidev,
-#ifdef CONFIG_PM
- .suspend = tw68_suspend,
- .resume = tw68_resume
-#endif
+ .name = "tw68",
+ .id_table = tw68_pci_tbl,
+ .probe = tw68_initdev,
+ .remove = tw68_finidev,
+ .driver.pm = &tw68_pm_ops,
};
module_pci_driver(tw68_pci_driver);