From 3f7e94e6d66b52bb6a86b7e06f5f2453491bf7c8 Mon Sep 17 00:00:00 2001 From: Sameer Pujar Date: Tue, 22 Jan 2019 13:03:16 +0530 Subject: [PATCH] ALSA: hda/tegra: runtime power management support This patch enables runtime power management(runtime PM) support for hda. pm_runtime_enable() and pm_runtime_disable() are added during device probe and remove respectively. The runtime PM callbacks will be forbidden if hda controller does not have support for runtime PM. pm_runtime_get_sync() and pm_runtime_put() are added for hda register access. The callbacks for above will be added in subsequent patches. Signed-off-by: Sameer Pujar Reviewed-by: Ravindra Lokhande Reviewed-by: Mohan Kumar D Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_tegra.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c index 97a176d817a0..2f9dd23981fe 100644 --- a/sound/pci/hda/hda_tegra.c +++ b/sound/pci/hda/hda_tegra.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include @@ -512,6 +513,11 @@ static int hda_tegra_probe(struct platform_device *pdev) 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 +534,7 @@ 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 +556,18 @@ 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)