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authorMengdong Lin <mengdong.lin@intel.com>2012-12-18 16:59:15 -0500
committerTakashi Iwai <tiwai@suse.de>2012-12-18 11:05:36 +0100
commit6ffe168f822cf7f777987cddc00ade542fd73bf0 (patch)
tree0c456b5c26f51cef736f998c428833c22fa32b91 /sound
parentb78562b10fa66175e30b76073e32a0ad8d92aa83 (diff)
downloadlinux-6ffe168f822cf7f777987cddc00ade542fd73bf0.tar.bz2
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_hdmi.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 37dd06dd96be..b6c21ea187ca 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -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);