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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>
This commit is contained in:
Kai Vehmanen 2023-08-02 10:01:05 -05:00 committed by Takashi Iwai
parent d2852b8c04
commit 3f8c530fc4
1 changed files with 10 additions and 4 deletions
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14
sound/hda/hdac_i915.c
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@ -75,16 +75,22 @@ static bool connectivity_check(struct pci_dev *i915, struct pci_dev *hdac)
if (bus_a == bus_b)
return true;
bus_a = bus_a->parent;
bus_b = bus_b->parent;
/* connected via parent bus (may be NULL!) */
if (bus_a == bus_b)
return true;
if (!bus_a || !bus_b)
return false;
/*
* on i915 discrete GPUs with embedded HDA audio, the two
* devices are connected via 2nd level PCI bridge
*/
bus_a = bus_a->parent;
bus_b = bus_b->parent;
if (!bus_a || !bus_b)
return false;
bus_a = bus_a->parent;
bus_b = bus_b->parent;
if (bus_a && bus_a == bus_b)
return true;