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ALSA: hda - bug fix for invalid connection list of Haswell HDMI codec pins 

Haswell HDMI codec pins may report invalid connection list entries, which
will cause failure to play audio via HDMI or Display Port.

So this patch adds fixup for Haswell to workaround this hardware issue:
enable DP1.2 mode and override the pins' connection list entries with proper
value.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Xingchao Wang <xingchao.wang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mengdong Lin 2012-12-18 16:59:15 -05:00 committed by Takashi Iwai
parent b78562b10f
commit 6ffe168f82
1 changed files with 28 additions and 0 deletions
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28
sound/pci/hda/patch_hdmi.c
View File

@ -1681,6 +1681,30 @@ static const struct hda_codec_ops generic_hdmi_patch_ops = {
.unsol_event = hdmi_unsol_event,
};
static void intel_haswell_fixup_connect_list(struct hda_codec *codec)
{
unsigned int vendor_param;
hda_nid_t list[3] = {0x2, 0x3, 0x4};
vendor_param = snd_hda_codec_read(codec, 0x08, 0, 0xf81, 0);
if (vendor_param == -1 || vendor_param & 0x02)
return;
/* enable DP1.2 mode */
vendor_param |= 0x02;
snd_hda_codec_read(codec, 0x08, 0, 0x781, vendor_param);
vendor_param = snd_hda_codec_read(codec, 0x08, 0, 0xf81, 0);
if (vendor_param == -1 || !(vendor_param & 0x02))
return;
/* override 3 pins connection list */
snd_hda_override_conn_list(codec, 0x05, 3, list);
snd_hda_override_conn_list(codec, 0x06, 3, list);
snd_hda_override_conn_list(codec, 0x07, 3, list);
}
static int patch_generic_hdmi(struct hda_codec *codec)
{
struct hdmi_spec *spec;
@ -1690,6 +1714,10 @@ static int patch_generic_hdmi(struct hda_codec *codec)
return -ENOMEM;
codec->spec = spec;
if (codec->vendor_id == 0x80862807)
intel_haswell_fixup_connect_list(codec);
if (hdmi_parse_codec(codec) < 0) {
codec->spec = NULL;
kfree(spec);