From 41cb54e20543d436ee6331cd66dd0413a7452804 Mon Sep 17 00:00:00 2001 From: Akihiro Tsukada Date: Sun, 8 Apr 2018 13:39:52 -0400 Subject: [PATCH] media: dvb: earth-pt1: add support for suspend/resume Without this patch, re-loading of the module was required after resume. Signed-off-by: Akihiro Tsukada Signed-off-by: Mauro Carvalho Chehab --- drivers/media/pci/pt1/pt1.c | 107 +++++++++++++++++++++++++++++++++++- 1 file changed, 105 insertions(+), 2 deletions(-) diff --git a/drivers/media/pci/pt1/pt1.c b/drivers/media/pci/pt1/pt1.c index 40b6c0ac3422..b169175d85e2 100644 --- a/drivers/media/pci/pt1/pt1.c +++ b/drivers/media/pci/pt1/pt1.c @@ -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); -- 2.30.2