[media] davinci: vpif capture:Add power management support
Implement power management operations - suspend and resume as part of
dev_pm_ops for VPIF capture driver.
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/davinci/vpif_capture.c b/drivers/media/video/davinci/vpif_capture.c
index 1d4427a..2727919 100644
--- a/drivers/media/video/davinci/vpif_capture.c
+++ b/drivers/media/video/davinci/vpif_capture.c
@@ -2312,26 +2312,70 @@
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];
+ mutex_lock(&common->lock);
+ 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];
+ mutex_lock(&common->lock);
+ 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 = {
@@ -2339,11 +2383,16 @@
.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,