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ALSA: hda - Limit i915 HDMI binding only for HSW and later

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It turned out that the pre-HSW Intel chips are incompatible with the
naive assumption we had -- the fixed mapping between the port and the
HD-audio widget.  This may result in the bad access, as captured by
the recent patch to add a WARN_ON() for the port mapping check.

As a quick workaround, disable the i915 audio component binding for
all pre-Haswell models.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.5
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2016-03-15 18:15:26 +01:00
parent 1f7c665896
commit b62232d429
1 changed files with 3 additions and 2 deletions
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5
sound/pci/hda/patch_hdmi.c
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@ -2243,9 +2243,10 @@ static int patch_generic_hdmi(struct hda_codec *codec)
codec->spec = spec;
hdmi_array_init(spec, 4);
/* Try to bind with i915 for any Intel codecs (if not done yet) */
/* Try to bind with i915 for Intel HSW+ codecs (if not done yet) */
if (!codec_has_acomp(codec) &&
(codec->core.vendor_id >> 16) == 0x8086)
(codec->core.vendor_id >> 16) == 0x8086 &&
is_haswell_plus(codec))
if (!snd_hdac_i915_init(&codec->bus->core))
spec->i915_bound = true;