[PATCH] ASoC: SOF: Intel: Move binding to display driver outside of deferred probe

[Maarten Lankhorst]

Hey,

On 2023-08-01 18:32, Pierre-Louis Bossart wrote:
> > I've been working on a small change to keep the workqueue in SOF and
> > only move the binding to the probe function to match what snd-hda-intel
> > is doing, but I don't know if that is needed?
> >
> > It was a bit unclear to me based on feedback if I should try to kill the
> > workqueue on all drivers (but with no way to test), or keep it around.
>
> My understanding is that we only want to move the binding to the probe
> function and leave the workqueue removal for another day - possibly never.

Patch 8/9 removed the workqueue, but can be replaced by the patch below, 
that simply moves out snd_sof_probe().

I've attempted this before, but didn't have snd_sof_remove in 
snd_sof_device_remove, which is why I would get a OOPS when attempting 
to do a shutdown/reboot.

With that I hopefully addressed the last concern.

Cheers,
Maarten

This mail can be applied with git am -c.
------8<---------
Now that we can use -EPROBE_DEFER, it's no longer required to spin off
the snd_hdac_i915_init into a workqueue.

Use the -EPROBE_DEFER mechanism instead, which must be returned in the
probe function.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
 sound/soc/sof/core.c            | 19 +++++++------------
 sound/soc/sof/intel/hda-codec.c |  2 +-
 2 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c
index 30db685cc5f4b..cd4d06d1800b1 100644
--- a/sound/soc/sof/core.c
+++ b/sound/soc/sof/core.c
@@ -188,13 +188,6 @@ static int sof_probe_continue(struct snd_sof_dev *sdev)
 	struct snd_sof_pdata *plat_data = sdev->pdata;
 	int ret;

-	/* probe the DSP hardware */
-	ret = snd_sof_probe(sdev);
-	if (ret < 0) {
-		dev_err(sdev->dev, "error: failed to probe DSP %d\n", ret);
-		goto probe_err;
-	}
-
 	sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);

 	/* check machine info */
@@ -325,10 +318,6 @@ static int sof_probe_continue(struct snd_sof_dev *sdev)
 dbg_err:
 	snd_sof_free_debug(sdev);
 dsp_err:
-	snd_sof_remove(sdev);
-probe_err:
-	sof_ops_free(sdev);
-
 	/* all resources freed, update state to match */
 	sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
 	sdev->first_boot = true;
@@ -436,6 +425,12 @@ int snd_sof_device_probe(struct device *dev, struct 
snd_sof_pdata *plat_data)

 	sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);

+	ret = snd_sof_probe(sdev);
+	if (ret) {
+		dev_err_probe(sdev->dev, ret, "failed to probe DSP\n");
+		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);
@@ -485,9 +480,9 @@ 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(sdev);
 	sof_ops_free(sdev);

 	/* release firmware */
diff --git a/sound/soc/sof/intel/hda-codec.c 
b/sound/soc/sof/intel/hda-codec.c
index f1fd5b44aaac9..344b61576c0e3 100644
--- a/sound/soc/sof/intel/hda-codec.c
+++ b/sound/soc/sof/intel/hda-codec.c
@@ -415,7 +415,7 @@ int hda_codec_i915_init(struct snd_sof_dev *sdev)
 		return 0;

 	/* i915 exposes a HDA codec for HDMI audio */
-	ret = snd_hdac_i915_init(bus, true);
+	ret = snd_hdac_i915_init(bus, false);
 	if (ret < 0)
 		return ret;

--
2.39.2