Commit 41cb54e2 authored by Akihiro Tsukada's avatar Akihiro Tsukada Committed by Mauro Carvalho Chehab
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media: dvb: earth-pt1: add support for suspend/resume 



Without this patch, re-loading of the module was required after resume.

Signed-off-by: default avatarAkihiro Tsukada <tskd08@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent b732539e

drivers/media/pci/pt1/pt1.c

+105 −2
Original line number Diff line number Diff line
@@ -461,12 +461,18 @@ static int pt1_thread(void *data) 
{

	struct pt1 *pt1;

	struct pt1_buffer_page *page;

	bool was_frozen;



	pt1 = data;

	set_freezable();



	while (!kthread_should_stop()) {

		try_to_freeze();

	while (!kthread_freezable_should_stop(&was_frozen)) {

		if (was_frozen) {

			int i;



			for (i = 0; i < PT1_NR_ADAPS; i++)

				pt1_set_stream(pt1, i, !!pt1->adaps[i]->users);

		}



		page = pt1->tables[pt1->table_index].bufs[pt1->buf_index].page;

		if (!pt1_filter(pt1, page)) {
@@ -1165,6 +1171,98 @@ static void pt1_i2c_init(struct pt1 *pt1) 
		pt1_i2c_emit(pt1, i, 0, 0, 1, 1, 0);

}



#ifdef CONFIG_PM_SLEEP



static int pt1_suspend(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct pt1 *pt1 = pci_get_drvdata(pdev);



	pt1_init_streams(pt1);

	pt1_disable_ram(pt1);

	pt1->power = 0;

	pt1->reset = 1;

	pt1_update_power(pt1);

	return 0;

}



static int pt1_resume(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct pt1 *pt1 = pci_get_drvdata(pdev);

	int ret;

	int i;



	pt1->power = 0;

	pt1->reset = 1;

	pt1_update_power(pt1);



	pt1_i2c_init(pt1);

	pt1_i2c_wait(pt1);



	ret = pt1_sync(pt1);

	if (ret < 0)

		goto resume_err;



	pt1_identify(pt1);



	ret = pt1_unlock(pt1);

	if (ret < 0)

		goto resume_err;



	ret = pt1_reset_pci(pt1);

	if (ret < 0)

		goto resume_err;



	ret = pt1_reset_ram(pt1);

	if (ret < 0)

		goto resume_err;



	ret = pt1_enable_ram(pt1);

	if (ret < 0)

		goto resume_err;



	pt1_init_streams(pt1);



	pt1->power = 1;

	pt1_update_power(pt1);

	msleep(20);



	pt1->reset = 0;

	pt1_update_power(pt1);

	usleep_range(1000, 2000);



	for (i = 0; i < PT1_NR_ADAPS; i++)

		dvb_frontend_reinitialise(pt1->adaps[i]->fe);



	pt1_init_table_count(pt1);

	for (i = 0; i < pt1_nr_tables; i++) {

		int j;



		for (j = 0; j < PT1_NR_BUFS; j++)

			pt1->tables[i].bufs[j].page->upackets[PT1_NR_UPACKETS-1]

				= 0;

		pt1_increment_table_count(pt1);

	}

	pt1_register_tables(pt1, pt1->tables[0].addr >> PT1_PAGE_SHIFT);



	pt1->table_index = 0;

	pt1->buf_index = 0;

	for (i = 0; i < PT1_NR_ADAPS; i++) {

		pt1->adaps[i]->upacket_count = 0;

		pt1->adaps[i]->packet_count = 0;

		pt1->adaps[i]->st_count = -1;

	}



	return 0;



resume_err:

	dev_info(&pt1->pdev->dev, "failed to resume PT1/PT2.");

	return 0;	/* resume anyway */

}



#endif /* CONFIG_PM_SLEEP */



static void pt1_remove(struct pci_dev *pdev)

{

	struct pt1 *pt1;
@@ -1325,11 +1423,16 @@ static const struct pci_device_id pt1_id_table[] = { 
};

MODULE_DEVICE_TABLE(pci, pt1_id_table);



static SIMPLE_DEV_PM_OPS(pt1_pm_ops, pt1_suspend, pt1_resume);



static struct pci_driver pt1_driver = {

	.name		= DRIVER_NAME,

	.probe		= pt1_probe,

	.remove		= pt1_remove,

	.id_table	= pt1_id_table,

#if CONFIG_PM_SLEEP

	.driver.pm	= &pt1_pm_ops,

#endif

};



module_pci_driver(pt1_driver);