Re: [Intel-xe] [PATCH 11/14] ALSA: hda/intel: Move snd_hdac_i915_init to before probe_work.

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Mon, Oct 02, 2023 at 09:38:44PM +0200, maarten.lankhorst@linux.intel.com wrote:
> From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> 
> 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.

This completely broke i915 audio!

I also can't see any trace of this stuff ever being posted to 
intel-gfx so it never went through the CI.

Please fix or revert ASAP.

> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
> ---
>  sound/pci/hda/hda_intel.c | 54 +++++++++++++++++++--------------------
>  1 file changed, 27 insertions(+), 27 deletions(-)
> 
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index e42ad0e816e1..9dad3607596a 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -2135,6 +2135,33 @@ static int azx_probe(struct pci_dev *pci,
>  
>  	pci_set_drvdata(pci, card);
>  
> +#ifdef CONFIG_SND_HDA_I915
> +	/* bind with i915 if needed */
> +	if (chip->driver_caps & AZX_DCAPS_I915_COMPONENT) {
> +		err = snd_hdac_i915_init(azx_bus(chip), false);
> +		if (err < 0) {
> +			/* if the controller is bound only with HDMI/DP
> +			 * (for HSW and BDW), we need to abort the probe;
> +			 * for other chips, still continue probing as other
> +			 * codecs can be on the same link.
> +			 */
> +			if (HDA_CONTROLLER_IN_GPU(pci)) {
> +				goto out_free;
> +			} else {
> +				/* don't bother any longer */
> +				chip->driver_caps &= ~AZX_DCAPS_I915_COMPONENT;
> +			}
> +		}
> +
> +		/* HSW/BDW controllers need this power */
> +		if (HDA_CONTROLLER_IN_GPU(pci))
> +			hda->need_i915_power = true;
> +	}
> +#else
> +	if (HDA_CONTROLLER_IN_GPU(pci))
> +		dev_err(card->dev, "Haswell/Broadwell HDMI/DP must build in CONFIG_SND_HDA_I915\n");
> +#endif
> +
>  	err = register_vga_switcheroo(chip);
>  	if (err < 0) {
>  		dev_err(card->dev, "Error registering vga_switcheroo client\n");
> @@ -2162,11 +2189,6 @@ static int azx_probe(struct pci_dev *pci,
>  	}
>  #endif /* CONFIG_SND_HDA_PATCH_LOADER */
>  
> -#ifndef CONFIG_SND_HDA_I915
> -	if (HDA_CONTROLLER_IN_GPU(pci))
> -		dev_err(card->dev, "Haswell/Broadwell HDMI/DP must build in CONFIG_SND_HDA_I915\n");
> -#endif
> -
>  	if (schedule_probe)
>  		schedule_delayed_work(&hda->probe_work, 0);
>  
> @@ -2264,28 +2286,6 @@ static int azx_probe_continue(struct azx *chip)
>  	to_hda_bus(bus)->bus_probing = 1;
>  	hda->probe_continued = 1;
>  
> -	/* bind with i915 if needed */
> -	if (chip->driver_caps & AZX_DCAPS_I915_COMPONENT) {
> -		err = snd_hdac_i915_init(bus, true);
> -		if (err < 0) {
> -			/* if the controller is bound only with HDMI/DP
> -			 * (for HSW and BDW), we need to abort the probe;
> -			 * for other chips, still continue probing as other
> -			 * codecs can be on the same link.
> -			 */
> -			if (HDA_CONTROLLER_IN_GPU(pci)) {
> -				goto out_free;
> -			} else {
> -				/* don't bother any longer */
> -				chip->driver_caps &= ~AZX_DCAPS_I915_COMPONENT;
> -			}
> -		}
> -
> -		/* HSW/BDW controllers need this power */
> -		if (HDA_CONTROLLER_IN_GPU(pci))
> -			hda->need_i915_power = true;
> -	}
> -
>  	/* Request display power well for the HDA controller or codec. For
>  	 * Haswell/Broadwell, both the display HDA controller and codec need
>  	 * this power. For other platforms, like Baytrail/Braswell, only the
> -- 
> 2.40.1

-- 
Ville Syrjälä
Intel