diff options
| author | Sameer Pujar <spujar@nvidia.com> | 2019-01-22 13:03:16 +0530 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-01-22 09:21:53 +0100 |
| commit | 3f7e94e6d66b52bb6a86b7e06f5f2453491bf7c8 (patch) | |
| tree | 92741a38e2b58d56a91149163f76b87f219dac30 /sound/pci/hda | |
| parent | fd1cc9de64c2ca6c2b5b9061421580a22bfac023 (diff) | |
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 <spujar@nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
Reviewed-by: Mohan Kumar D <mkumard@nvidia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda')
| -rw-r--r-- | sound/pci/hda/hda_tegra.c | 15 |
1 files changed, 14 insertions, 1 deletions
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 <linux/slab.h> #include <linux/time.h> #include <linux/string.h> +#include <linux/pm_runtime.h> #include <sound/core.h> #include <sound/initval.h> @@ -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) |