[PATCH v3 2/5] ASoC: codecs: hda: Skip HDMI/DP registration if i915 is missing

[Cezary Rojewski <cezary.rojewski@intel.com>]

If i915 does not support given platform but the hardware i.e.: HDAudio
codec is still there, the codec-probing procedure will succeed for such
device but the follow up initialization will always end up with -ENODEV.

While bus could filter out address '2' which Intel's HDMI/DP codecs
always enumerate on, more robust approach is to check for i915 presence
before registering display codecs.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/codecs/hda.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/soc/codecs/hda.c b/sound/soc/codecs/hda.c
index d2117e36ddd1..7c6bedeceaa2 100644
--- a/sound/soc/codecs/hda.c
+++ b/sound/soc/codecs/hda.c
@@ -350,6 +350,11 @@ static int hda_hdev_attach(struct hdac_device *hdev)
 	struct hda_codec *codec = dev_to_hda_codec(&hdev->dev);
 	struct snd_soc_component_driver *comp_drv;
 
+	if (hda_codec_is_display(codec) && !hdev->bus->audio_component) {
+		dev_dbg(&hdev->dev, "no i915, skip registration for 0x%08x\n", hdev->vendor_id);
+		return -ENODEV;
+	}
+
 	comp_drv = devm_kzalloc(&hdev->dev, sizeof(*comp_drv), GFP_KERNEL);
 	if (!comp_drv)
 		return -ENOMEM;
-- 
2.25.1