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Commit e9530dac authored by Manjunath Hadli's avatar Manjunath Hadli Committed by Mauro Carvalho Chehab
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[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: default avatarManjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: default avatarLad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 6964b103

drivers/media/video/davinci/vpif_display.c

+71 −0
Original line number Diff line number Diff line
@@ -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,