ASoC: SOF: acpi: add debug module param (70b0c75a) · Commits · 戴 / test

Add debug parameter for snd-sof-acpi. 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/20191008164443.1358-4-pierre-louis.bossart@linux.intel.com Signed-off-by:

Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-acpi-dev.c

+11 −1

Original line number	Diff line number	Diff line
		@@ -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_acpi_debug;
		module_param_named(sof_acpi_debug, sof_acpi_debug, int, 0444);
		MODULE_PARM_DESC(sof_acpi_debug, "SOF ACPI debug options (0x0 all off)");

		#define SOF_ACPI_DISABLE_PM_RUNTIME BIT(0)

		#if IS_ENABLED(CONFIG_SND_SOC_SOF_HASWELL)
		static const struct sof_dev_desc sof_acpi_haswell_desc = {
		.machines = snd_soc_acpi_intel_haswell_machines,
		@@ -121,6 +127,9 @@ static const struct dev_pm_ops sof_acpi_pm = {

		static void sof_acpi_probe_complete(struct device *dev)
		{
		if (sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME)
		return;

		/* allow runtime_pm */
		pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
		pm_runtime_use_autosuspend(dev);
		@@ -221,6 +230,7 @@ static int sof_acpi_probe(struct platform_device *pdev)

		static int sof_acpi_remove(struct platform_device *pdev)
		{
		if (!(sof_acpi_debug & SOF_ACPI_DISABLE_PM_RUNTIME))
		pm_runtime_disable(&pdev->dev);

		/* call sof helper for DSP hardware remove */

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