diff options
Diffstat (limited to 'sound/pci/hda/hda_tegra.c')
| -rw-r--r-- | sound/pci/hda/hda_tegra.c | 132 |
1 files changed, 88 insertions, 44 deletions
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c index 97a176d817a0..dbd8da5685cb 100644 --- a/sound/pci/hda/hda_tegra.c +++ b/sound/pci/hda/hda_tegra.c @@ -32,6 +32,7 @@ #include <linux/slab.h> #include <linux/time.h> #include <linux/string.h> +#include <linux/pm_runtime.h> #include <sound/core.h> #include <sound/initval.h> @@ -232,40 +233,72 @@ static void hda_tegra_disable_clocks(struct hda_tegra *data) static int hda_tegra_suspend(struct device *dev) { struct snd_card *card = dev_get_drvdata(dev); - struct azx *chip = card->private_data; - struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); - struct hdac_bus *bus = azx_bus(chip); + int rc; + rc = pm_runtime_force_suspend(dev); + if (rc < 0) + return rc; snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); - azx_stop_chip(chip); - synchronize_irq(bus->irq); - azx_enter_link_reset(chip); - hda_tegra_disable_clocks(hda); - return 0; } static int hda_tegra_resume(struct device *dev) { struct snd_card *card = dev_get_drvdata(dev); + int rc; + + rc = pm_runtime_force_resume(dev); + if (rc < 0) + return rc; + snd_power_change_state(card, SNDRV_CTL_POWER_D0); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +#ifdef CONFIG_PM +static int hda_tegra_runtime_suspend(struct device *dev) +{ + struct snd_card *card = dev_get_drvdata(dev); struct azx *chip = card->private_data; struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); + struct hdac_bus *bus = azx_bus(chip); - hda_tegra_enable_clocks(hda); + if (chip && chip->running) { + azx_stop_chip(chip); + synchronize_irq(bus->irq); + azx_enter_link_reset(chip); + } + hda_tegra_disable_clocks(hda); - hda_tegra_init(hda); + return 0; +} - azx_init_chip(chip, 1); +static int hda_tegra_runtime_resume(struct device *dev) +{ + struct snd_card *card = dev_get_drvdata(dev); + struct azx *chip = card->private_data; + struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); + int rc; - snd_power_change_state(card, SNDRV_CTL_POWER_D0); + rc = hda_tegra_enable_clocks(hda); + if (rc != 0) + return rc; + if (chip && chip->running) { + hda_tegra_init(hda); + azx_init_chip(chip, 1); + } return 0; } -#endif /* CONFIG_PM_SLEEP */ +#endif /* CONFIG_PM */ static const struct dev_pm_ops hda_tegra_pm = { SET_SYSTEM_SLEEP_PM_OPS(hda_tegra_suspend, hda_tegra_resume) + SET_RUNTIME_PM_OPS(hda_tegra_runtime_suspend, + hda_tegra_runtime_resume, + NULL) }; static int hda_tegra_dev_disconnect(struct snd_device *device) @@ -303,7 +336,23 @@ static int hda_tegra_init_chip(struct azx *chip, struct platform_device *pdev) struct hdac_bus *bus = azx_bus(chip); struct device *dev = hda->dev; struct resource *res; - int err; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hda->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(hda->regs)) + return PTR_ERR(hda->regs); + + bus->remap_addr = hda->regs + HDA_BAR0; + bus->addr = res->start + HDA_BAR0; + + hda_tegra_init(hda); + + return 0; +} + +static int hda_tegra_init_clk(struct hda_tegra *hda) +{ + struct device *dev = hda->dev; hda->hda_clk = devm_clk_get(dev, "hda"); if (IS_ERR(hda->hda_clk)) { @@ -321,22 +370,6 @@ static int hda_tegra_init_chip(struct azx *chip, struct platform_device *pdev) return PTR_ERR(hda->hda2hdmi_clk); } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - hda->regs = devm_ioremap_resource(dev, res); - if (IS_ERR(hda->regs)) - return PTR_ERR(hda->regs); - - bus->remap_addr = hda->regs + HDA_BAR0; - bus->addr = res->start + HDA_BAR0; - - err = hda_tegra_enable_clocks(hda); - if (err) { - dev_err(dev, "failed to get enable clocks\n"); - return err; - } - - hda_tegra_init(hda); - return 0; } @@ -347,8 +380,8 @@ static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev) int err; unsigned short gcap; int irq_id = platform_get_irq(pdev, 0); - const char *sname; - struct device_node *root; + const char *sname, *drv_name = "tegra-hda"; + struct device_node *np = pdev->dev.of_node; err = hda_tegra_init_chip(chip, pdev); if (err) @@ -407,17 +440,11 @@ static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev) } /* driver name */ - strcpy(card->driver, "tegra-hda"); - - root = of_find_node_by_path("/"); - sname = of_get_property(root, "compatible", NULL); - of_node_put(root); - if (!sname) { - dev_err(card->dev, - "failed to get compatible property from root node\n"); - return -ENODEV; - } + strncpy(card->driver, drv_name, sizeof(card->driver)); /* shortname for card */ + sname = of_get_property(np, "nvidia,model", NULL); + if (!sname) + sname = drv_name; if (strlen(sname) > sizeof(card->shortname)) dev_info(card->dev, "truncating shortname for card\n"); strncpy(card->shortname, sname, sizeof(card->shortname)); @@ -487,7 +514,8 @@ MODULE_DEVICE_TABLE(of, hda_tegra_match); static int hda_tegra_probe(struct platform_device *pdev) { - const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR; + const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR | + AZX_DCAPS_PM_RUNTIME; struct snd_card *card; struct azx *chip; struct hda_tegra *hda; @@ -506,12 +534,21 @@ static int hda_tegra_probe(struct platform_device *pdev) return err; } + err = hda_tegra_init_clk(hda); + if (err < 0) + goto out_free; + err = hda_tegra_create(card, driver_flags, hda); if (err < 0) goto out_free; card->private_data = chip; dev_set_drvdata(&pdev->dev, card); + + pm_runtime_enable(hda->dev); + if (!azx_has_pm_runtime(chip)) + pm_runtime_forbid(hda->dev); + schedule_work(&hda->probe_work); return 0; @@ -528,6 +565,7 @@ static void hda_tegra_probe_work(struct work_struct *work) struct platform_device *pdev = to_platform_device(hda->dev); int err; + pm_runtime_get_sync(hda->dev); err = hda_tegra_first_init(chip, pdev); if (err < 0) goto out_free; @@ -549,12 +587,18 @@ static void hda_tegra_probe_work(struct work_struct *work) snd_hda_set_power_save(&chip->bus, power_save * 1000); out_free: + pm_runtime_put(hda->dev); return; /* no error return from async probe */ } static int hda_tegra_remove(struct platform_device *pdev) { - return snd_card_free(dev_get_drvdata(&pdev->dev)); + int ret; + + ret = snd_card_free(dev_get_drvdata(&pdev->dev)); + pm_runtime_disable(&pdev->dev); + + return ret; } static void hda_tegra_shutdown(struct platform_device *pdev) |