diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2019-10-08 11:44:38 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-10-10 15:15:27 +0100 |
| commit | 8b160dc2a92c83a566b0596c79febb5933f9a6b5 (patch) | |
| tree | fb8d7ca49a803ee35ecc646093ebda8d9de1f3d0 /sound | |
| parent | 70b0c75ae1e3d35f829b5fe7ae5692efae63ca71 (diff) | |
| download | linux-8b160dc2a92c83a566b0596c79febb5933f9a6b5.tar.bz2 | |
ASoC: SOF: pci: add debug module param
Add debug parameter for snd-sof-pci.
One of the usages for this debug parameter to disable pm_runtime,
which can be useful for platform bringup, or keep the parent device
active while enabling pm_runtime for child devices (e.g. with
SoundWire or MFD). This can also be useful to measure suspend-resume
latencies or child devices.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191008164443.1358-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sof/sof-pci-dev.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sound/soc/sof/sof-pci-dev.c b/sound/soc/sof/sof-pci-dev.c index d66412a77873..030f2cb06921 100644 --- a/sound/soc/sof/sof-pci-dev.c +++ b/sound/soc/sof/sof-pci-dev.c @@ -29,6 +29,12 @@ static char *tplg_path; module_param(tplg_path, charp, 0444); MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology."); +static int sof_pci_debug; +module_param_named(sof_pci_debug, sof_pci_debug, int, 0444); +MODULE_PARM_DESC(sof_pci_debug, "SOF PCI debug options (0x0 all off)"); + +#define SOF_PCI_DISABLE_PM_RUNTIME BIT(0) + #if IS_ENABLED(CONFIG_SND_SOC_SOF_APOLLOLAKE) static const struct sof_dev_desc bxt_desc = { .machines = snd_soc_acpi_intel_bxt_machines, @@ -249,6 +255,9 @@ static void sof_pci_probe_complete(struct device *dev) { dev_dbg(dev, "Completing SOF PCI probe"); + if (sof_pci_debug & SOF_PCI_DISABLE_PM_RUNTIME) + return; + /* allow runtime_pm */ pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS); pm_runtime_use_autosuspend(dev); @@ -370,7 +379,8 @@ static void sof_pci_remove(struct pci_dev *pci) snd_sof_device_remove(&pci->dev); /* follow recommendation in pci-driver.c to increment usage counter */ - pm_runtime_get_noresume(&pci->dev); + if (!(sof_pci_debug & SOF_PCI_DISABLE_PM_RUNTIME)) + pm_runtime_get_noresume(&pci->dev); /* release pci regions and disable device */ pci_release_regions(pci); |