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| author | Manjunath Hadli <manjunath.hadli@ti.com> | 2012-04-13 11:50:35 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-31 02:07:30 +0400 |
| commit | e9530dac31c0c0296242e9209c89f5a580a2d64b (patch) | |
| tree | 3721233d28c192626b90e4a0c9d730ab98518991 /drivers/media/video/davinci | |
| parent | 6964b1036388fee258c48a911ac4a3ff4e55b62d (diff) | |
| download | linux-e9530dac31c0c0296242e9209c89f5a580a2d64b.tar.xz | |
[media] davinci: vpif display: Add power management support
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>
Diffstat (limited to 'drivers/media/video/davinci')
| -rw-r--r-- | drivers/media/video/davinci/vpif_display.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/media/video/davinci/vpif_display.c b/drivers/media/video/davinci/vpif_display.c index c3e2c193dda1..e129c98921ad 100644 --- a/drivers/media/video/davinci/vpif_display.c +++ b/drivers/media/video/davinci/vpif_display.c @@ -1882,10 +1882,81 @@ static int vpif_remove(struct platform_device *device) 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 = { .driver = { .name = "vpif_display", .owner = THIS_MODULE, + .pm = vpif_pm_ops, }, .probe = vpif_probe, .remove = vpif_remove, |