From 0985313a2a9d2e84d6a6b1041c88b5c57ee46dfa Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Fri, 25 Sep 2026 17:10:43 +0100 Subject: [PATCH] ASoC: SDCA: export PM helpers keyed on sdca_class_drv The class PM callbacks pull sdca_class_drv out of drvdata, so the built-in class_sdw_driver owns the drvdata slot. That works for the generic case but blocks codec drivers that want to embed sdca_class_drv in their own private struct -- they need drvdata for their codec priv. Split the four callbacks into exported helpers that take a struct sdca_class_drv * directly: sdca_class_system_suspend() sdca_class_system_resume() sdca_class_runtime_suspend() sdca_class_runtime_resume() Codec drivers can now compose these into their own dev_pm_ops without going through drvdata. For the built-in class_sdw_driver, add small dev_pm_ops wrappers that fetch drv from drvdata and wire them into sdca_class_pm_ops. The ops struct itself stays private to this file; codec drivers build their own dev_pm_ops from the four exported helpers above. No functional change: the built-in class_sdw_driver keeps the same PM semantics; only the internal plumbing shifts to operate on sdca_class_drv instead of struct device *dev. Signed-off-by: Srinivas Kandagatla Reviewed-by: Charles Keepax Link: https://patch.msgid.link/20260925161049.758913-3-srinivas.kandagatla@oss.qualcomm.com Signed-off-by: Mark Brown --- .../soc/sdca => include/sound}/sdca_class.h | 14 ++++ sound/soc/sdca/sdca_class.c | 81 ++++++++++++++----- sound/soc/sdca/sdca_class_function.c | 2 +- 3 files changed, 78 insertions(+), 19 deletions(-) rename {sound/soc/sdca => include/sound}/sdca_class.h (58%) diff --git a/sound/soc/sdca/sdca_class.h b/include/sound/sdca_class.h similarity index 58% rename from sound/soc/sdca/sdca_class.h rename to include/sound/sdca_class.h index 57f7f8d08f49..8a6a34a8dd4c 100644 --- a/sound/soc/sdca/sdca_class.h +++ b/include/sound/sdca_class.h @@ -32,4 +32,18 @@ struct sdca_class_drv { struct work_struct boot_work; }; +/* + * PM helpers. Codec drivers embed sdca_class_drv in their own priv, + * own dev_set_drvdata(), and compose these into their own dev_pm_ops: + * + * static int wcd_runtime_suspend(struct device *dev) { + * struct wcd_priv *priv = dev_get_drvdata(dev); + * return sdca_class_runtime_suspend(&priv->class); + * } + */ +int sdca_class_runtime_suspend(struct sdca_class_drv *drv); +int sdca_class_runtime_resume(struct sdca_class_drv *drv); +int sdca_class_system_suspend(struct sdca_class_drv *drv); +int sdca_class_system_resume(struct sdca_class_drv *drv); + #endif /* __SDCA_CLASS_H__ */ diff --git a/sound/soc/sdca/sdca_class.c b/sound/soc/sdca/sdca_class.c index d7444f442c71..a092ebaa620a 100644 --- a/sound/soc/sdca/sdca_class.c +++ b/sound/soc/sdca/sdca_class.c @@ -20,7 +20,7 @@ #include #include #include -#include "sdca_class.h" +#include #define CLASS_SDW_ATTACH_TIMEOUT_MS 5000 @@ -194,30 +194,41 @@ static void class_sdw_remove(struct sdw_slave *sdw) cancel_work_sync(&drv->boot_work); } -static int class_suspend(struct device *dev) +/** + * sdca_class_system_suspend - SDCA class system suspend helper + * @drv: caller-owned sdca_class_drv. + * + * Codec drivers compose this into their own dev_pm_ops. Disables the + * SoundWire interrupt and forces runtime suspend of the underlying + * class regmap. + */ +int sdca_class_system_suspend(struct sdca_class_drv *drv) { - struct sdca_class_drv *drv = dev_get_drvdata(dev); int ret; disable_irq(drv->sdw->irq); - ret = pm_runtime_force_suspend(dev); + ret = pm_runtime_force_suspend(drv->dev); if (ret) { - dev_err(dev, "failed to force suspend: %d\n", ret); + dev_err(drv->dev, "failed to force suspend: %d\n", ret); return ret; } return 0; } +EXPORT_SYMBOL_NS_GPL(sdca_class_system_suspend, "SND_SOC_SDCA_CLASS"); -static int class_resume(struct device *dev) +/** + * sdca_class_system_resume - SDCA class system resume helper + * @drv: caller-owned sdca_class_drv. + */ +int sdca_class_system_resume(struct sdca_class_drv *drv) { - struct sdca_class_drv *drv = dev_get_drvdata(dev); int ret; - ret = pm_runtime_force_resume(dev); + ret = pm_runtime_force_resume(drv->dev); if (ret) { - dev_err(dev, "failed to force resume: %d\n", ret); + dev_err(drv->dev, "failed to force resume: %d\n", ret); return ret; } @@ -225,11 +236,14 @@ static int class_resume(struct device *dev) return 0; } +EXPORT_SYMBOL_NS_GPL(sdca_class_system_resume, "SND_SOC_SDCA_CLASS"); -static int class_runtime_suspend(struct device *dev) +/** + * sdca_class_runtime_suspend - SDCA class runtime suspend helper + * @drv: caller-owned sdca_class_drv. + */ +int sdca_class_runtime_suspend(struct sdca_class_drv *drv) { - struct sdca_class_drv *drv = dev_get_drvdata(dev); - /* * Whilst the driver doesn't power the chip down here, going into runtime * suspend lets the SoundWire bus power down, which means the driver @@ -239,10 +253,14 @@ static int class_runtime_suspend(struct device *dev) return 0; } +EXPORT_SYMBOL_NS_GPL(sdca_class_runtime_suspend, "SND_SOC_SDCA_CLASS"); -static int class_runtime_resume(struct device *dev) +/** + * sdca_class_runtime_resume - SDCA class runtime resume helper + * @drv: caller-owned sdca_class_drv. + */ +int sdca_class_runtime_resume(struct sdca_class_drv *drv) { - struct sdca_class_drv *drv = dev_get_drvdata(dev); int ret; ret = sdw_slave_wait_for_init(drv->sdw, CLASS_SDW_ATTACH_TIMEOUT_MS); @@ -265,10 +283,37 @@ static int class_runtime_resume(struct device *dev) return ret; } +EXPORT_SYMBOL_NS_GPL(sdca_class_runtime_resume, "SND_SOC_SDCA_CLASS"); -static const struct dev_pm_ops class_pm_ops = { - SYSTEM_SLEEP_PM_OPS(class_suspend, class_resume) - RUNTIME_PM_OPS(class_runtime_suspend, class_runtime_resume, NULL) +/* + * Convenience dev_pm_ops used by the built-in class_sdw_driver, which + * stashes its sdca_class_drv in drvdata directly. Codec drivers that + * embed sdca_class_drv in their own priv compose their own dev_pm_ops + * using the sdca_class_*_suspend/resume helpers above. + */ +static int class_pm_system_suspend(struct device *dev) +{ + return sdca_class_system_suspend(dev_get_drvdata(dev)); +} + +static int class_pm_system_resume(struct device *dev) +{ + return sdca_class_system_resume(dev_get_drvdata(dev)); +} + +static int class_pm_runtime_suspend(struct device *dev) +{ + return sdca_class_runtime_suspend(dev_get_drvdata(dev)); +} + +static int class_pm_runtime_resume(struct device *dev) +{ + return sdca_class_runtime_resume(dev_get_drvdata(dev)); +} + +static const struct dev_pm_ops sdca_class_pm_ops = { + SYSTEM_SLEEP_PM_OPS(class_pm_system_suspend, class_pm_system_resume) + RUNTIME_PM_OPS(class_pm_runtime_suspend, class_pm_runtime_resume, NULL) }; static const struct sdw_device_id class_sdw_id[] = { @@ -282,7 +327,7 @@ MODULE_DEVICE_TABLE(sdw, class_sdw_id); static struct sdw_driver class_sdw_driver = { .driver = { .name = "sdca_class", - .pm = pm_ptr(&class_pm_ops), + .pm = pm_ptr(&sdca_class_pm_ops), }, .probe = class_sdw_probe, diff --git a/sound/soc/sdca/sdca_class_function.c b/sound/soc/sdca/sdca_class_function.c index 1d7fd6603882..411e3d717bb6 100644 --- a/sound/soc/sdca/sdca_class_function.c +++ b/sound/soc/sdca/sdca_class_function.c @@ -26,7 +26,7 @@ #include #include #include -#include "sdca_class.h" +#include #include "sdca_function_device.h" struct class_function_drv {