ALSA: hda/i915: extend connectivity check to cover Intel ARL
Expand the HDA/I915 connectivity check to correctly handle the PCI topology used in some Intel Arrow Lake products. Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Tested-by: "T, Arun" <arun.t@intel.com> Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20230802150105.24604-6-pierre-louis.bossart@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -75,16 +75,22 @@ static bool connectivity_check(struct pci_dev *i915, struct pci_dev *hdac)
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if (bus_a == bus_b)
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return true;
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bus_a = bus_a->parent;
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bus_b = bus_b->parent;
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/* connected via parent bus (may be NULL!) */
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if (bus_a == bus_b)
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return true;
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if (!bus_a || !bus_b)
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return false;
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/*
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* on i915 discrete GPUs with embedded HDA audio, the two
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* devices are connected via 2nd level PCI bridge
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*/
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bus_a = bus_a->parent;
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bus_b = bus_b->parent;
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if (!bus_a || !bus_b)
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return false;
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bus_a = bus_a->parent;
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bus_b = bus_b->parent;
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if (bus_a && bus_a == bus_b)
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return true;
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