Implement power management operations - suspend and resume as part of
dev_pm_ops for VPIF capture driver.
Signed-off-by: Manjunath Hadli <manjunath.ha...@ti.com>
---
drivers/media/video/davinci/vpif_capture.c | 77 +++++++++++++++++++++++----
1 files changed, 65 insertions(+), 12 deletions(-)
diff --git a/drivers/media/video/davinci/vpif_capture.c
b/drivers/media/video/davinci/vpif_capture.c
index 63388a3..7fc7444 100644
--- a/drivers/media/video/davinci/vpif_capture.c
+++ b/drivers/media/video/davinci/vpif_capture.c
@@ -2321,26 +2321,74 @@ static int vpif_remove(struct platform_device *device)
return 0;
}
+#ifdef CONFIG_PM
/**
* vpif_suspend: vpif device suspend
- *
- * TODO: Add suspend code here
*/
-static int
-vpif_suspend(struct device *dev)
+static int vpif_suspend(struct device *dev)
{
- return -1;
+
+ struct common_obj *common;
+ struct channel_obj *ch;
+ int i;
+
+ for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
+ /* Get the pointer to the channel object */
+ ch = vpif_obj.dev[i];
+ common = &ch->common[VPIF_VIDEO_INDEX];
+ if (mutex_lock_interruptible(&common->lock))
+ return -ERESTARTSYS;
+
+ if (ch->usrs && common->io_usrs) {
+ /* Disable channel */
+ if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
+ enable_channel0(0);
+ channel0_intr_enable(0);
+ }
+ if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
+ common->started == 2) {
+ enable_channel1(0);
+ channel1_intr_enable(0);
+ }
+ }
+ mutex_unlock(&common->lock);
+ }
+
+ return 0;
}
-/**
+/*
* vpif_resume: vpif device suspend
- *
- * TODO: Add resume code here
*/
-static int
-vpif_resume(struct device *dev)
+static int vpif_resume(struct device *dev)
{
- return -1;
+ struct common_obj *common;
+ struct channel_obj *ch;
+ int i;
+
+ for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
+ /* Get the pointer to the channel object */
+ ch = vpif_obj.dev[i];
+ common = &ch->common[VPIF_VIDEO_INDEX];
+ if (mutex_lock_interruptible(&common->lock))
+ return -ERESTARTSYS;
+
+ if (ch->usrs && common->io_usrs) {
+ /* Disable channel */
+ if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
+ enable_channel0(1);
+ channel0_intr_enable(1);
+ }
+ if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
+ common->started == 2) {
+ enable_channel1(1);
+ channel1_intr_enable(1);
+ }
+ }
+ mutex_unlock(&common->lock);
+ }
+
+ return 0;
}
static const struct dev_pm_ops vpif_dev_pm_ops = {
@@ -2348,11 +2396,16 @@ static const struct dev_pm_ops vpif_dev_pm_ops = {
.resume = vpif_resume,
};
+#define vpif_pm_ops (&vpif_dev_pm_ops)
+#else
+#define vpif_pm_ops NULL
+#endif
+
static __refdata struct platform_driver vpif_driver = {
.driver = {
.name = "vpif_capture",
.owner = THIS_MODULE,
- .pm = &vpif_dev_pm_ops,
+ .pm = vpif_pm_ops,
},
.probe = vpif_probe,
.remove = vpif_remove,
--
1.7.4.1
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