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Subject[PATCH] ASoC: SOF: Intel: Move binding to display driver outside of deferred probe
From
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@linux.intel.com>
---
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
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