From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
The existing DSP probe may be handled in a workqueue to allow for extra time, typically for the i915 request_module and HDAudio codec handling.
With the upcoming changes for i915/Xe driver relying on the -EPROBE_DEFER mechanism, we need to have a first pass of the probe which cannot be pushed to a workqueue. Introduce 2 new optional callbacks.
probe_early is called before the workqueue runs. remove_late may be called from the workqueue if load is unsuccesful, but will otherwise be called on module unload.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com Acked-by: Mark Brown broonie@kernel.org --- sound/soc/sof/core.c | 11 +++++++++++ sound/soc/sof/ops.h | 16 ++++++++++++++++ sound/soc/sof/sof-priv.h | 2 ++ 3 files changed, 29 insertions(+)
diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index 0938b259f7034..d7b090224f1b9 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -327,6 +327,7 @@ static int sof_probe_continue(struct snd_sof_dev *sdev) dsp_err: snd_sof_remove(sdev); probe_err: + snd_sof_remove_late(sdev); sof_ops_free(sdev);
/* all resources freed, update state to match */ @@ -436,6 +437,14 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data)
sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
+ /* + * first pass of probe which isn't allowed to run in a work-queue, + * typically to rely on -EPROBE_DEFER dependencies + */ + ret = snd_sof_probe_early(sdev); + if (ret < 0) + return ret; + if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) { INIT_WORK(&sdev->probe_work, sof_probe_work); schedule_work(&sdev->probe_work); @@ -487,9 +496,11 @@ int snd_sof_device_remove(struct device *dev) snd_sof_ipc_free(sdev); snd_sof_free_debug(sdev); snd_sof_remove(sdev); + snd_sof_remove_late(sdev); sof_ops_free(sdev); } else if (aborted) { /* probe_work never ran */ + snd_sof_remove_late(sdev); sof_ops_free(sdev); }
diff --git a/sound/soc/sof/ops.h b/sound/soc/sof/ops.h index 9ab7b9be765bc..3ebcfc2373854 100644 --- a/sound/soc/sof/ops.h +++ b/sound/soc/sof/ops.h @@ -38,6 +38,14 @@ static inline void sof_ops_free(struct snd_sof_dev *sdev) /* Mandatory operations are verified during probing */
/* init */ +static inline int snd_sof_probe_early(struct snd_sof_dev *sdev) +{ + if (sof_ops(sdev)->probe_early) + return sof_ops(sdev)->probe_early(sdev); + + return 0; +} + static inline int snd_sof_probe(struct snd_sof_dev *sdev) { return sof_ops(sdev)->probe(sdev); @@ -51,6 +59,14 @@ static inline int snd_sof_remove(struct snd_sof_dev *sdev) return 0; }
+static inline int snd_sof_remove_late(struct snd_sof_dev *sdev) +{ + if (sof_ops(sdev)->remove_late) + return sof_ops(sdev)->remove_late(sdev); + + return 0; +} + static inline int snd_sof_shutdown(struct snd_sof_dev *sdev) { if (sof_ops(sdev)->shutdown) diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index d4f6702e93dcb..e73a92189fe1f 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -165,8 +165,10 @@ struct sof_firmware { struct snd_sof_dsp_ops {
/* probe/remove/shutdown */ + int (*probe_early)(struct snd_sof_dev *sof_dev); /* optional */ int (*probe)(struct snd_sof_dev *sof_dev); /* mandatory */ int (*remove)(struct snd_sof_dev *sof_dev); /* optional */ + int (*remove_late)(struct snd_sof_dev *sof_dev); /* optional */ int (*shutdown)(struct snd_sof_dev *sof_dev); /* optional */
/* DSP core boot / reset */