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[media] davinci: vpif display: Add power management support

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Implement power management operations - suspend and resume as part of
dev_pm_ops for VPIF display 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>
This commit is contained in:
Manjunath Hadli 2012-04-13 04:50:35 -03:00 committed by Mauro Carvalho Chehab
parent 6964b10363
commit e9530dac31
1 changed files with 71 additions and 0 deletions
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71
drivers/media/video/davinci/vpif_display.c
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@ -1882,10 +1882,81 @@ static int vpif_remove(struct platform_device *device)
return 0; return 0;
} }
#ifdef CONFIG_PM
static int vpif_suspend(struct device *dev)
{
struct common_obj *common;
struct channel_obj *ch;
int i;
for (i = 0; i < VPIF_DISPLAY_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 (atomic_read(&ch->usrs) && common->io_usrs) {
/* Disable channel */
if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
enable_channel2(0);
channel2_intr_enable(0);
}
if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
common->started == 2) {
enable_channel3(0);
channel3_intr_enable(0);
}
}
mutex_unlock(&common->lock);
}
return 0;
}
static int vpif_resume(struct device *dev)
{
struct common_obj *common;
struct channel_obj *ch;
int i;
for (i = 0; i < VPIF_DISPLAY_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 (atomic_read(&ch->usrs) && common->io_usrs) {
/* Enable channel */
if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
enable_channel2(1);
channel2_intr_enable(1);
}
if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
common->started == 2) {
enable_channel3(1);
channel3_intr_enable(1);
}
}
mutex_unlock(&common->lock);
}
return 0;
}
static const struct dev_pm_ops vpif_pm = {
.suspend = vpif_suspend,
.resume = vpif_resume,
};
#define vpif_pm_ops (&vpif_pm)
#else
#define vpif_pm_ops NULL
#endif
static __refdata struct platform_driver vpif_driver = { static __refdata struct platform_driver vpif_driver = {
.driver = { .driver = {
.name = "vpif_display", .name = "vpif_display",
.owner = THIS_MODULE, .owner = THIS_MODULE,
.pm = vpif_pm_ops,
}, },
.probe = vpif_probe, .probe = vpif_probe,
.remove = vpif_remove, .remove = vpif_remove,