From: Stephen Warren swarren@nvidia.com
(This is upstream 75fae117a5db "ALSA: hda/hdmi - allow PIN_OUT to be dynamically enabled", backported to stable 3.10 through 3.12. 3.13 and later can take the original patch.)
Commit 384a48d71520 "ALSA: hda: HDMI: Support codecs with fewer cvts than pins" dynamically enabled each pin widget's PIN_OUT only when the pin was actively in use. This was required on certain NVIDIA CODECs for correct operation. Specifically, if multiple pin widgets each had their mux input select the same audio converter widget and each pin widget had PIN_OUT enabled, then only one of the pin widgets would actually receive the audio, and often not the one the user wanted!
However, this apparently broke some Intel systems, and commit 6169b673618b "ALSA: hda - Always turn on pins for HDMI/DP" reverted the dynamic setting of PIN_OUT. This in turn broke the afore-mentioned NVIDIA CODECs.
This change supports either dynamic or static handling of PIN_OUT, selected by a flag set up during CODEC initialization. This flag is enabled for all recent NVIDIA GPUs.
Reported-by: Uosis uosisl@gmail.com Signed-off-by: Stephen Warren swarren@nvidia.com --- sound/pci/hda/patch_hdmi.c | 40 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 4 deletions(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index aad73a1fc2cd..417e0fc2d119 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -88,6 +88,9 @@ struct hdmi_spec { unsigned int channels_max; /* max over all cvts */
struct hdmi_eld temp_eld; + + bool dyn_pin_out; + /* * Non-generic ATI/NVIDIA specific */ @@ -452,15 +455,25 @@ static void hdmi_write_dip_byte(struct hda_codec *codec, hda_nid_t pin_nid,
static void hdmi_init_pin(struct hda_codec *codec, hda_nid_t pin_nid) { + struct hdmi_spec *spec = codec->spec; + int pin_out; + /* Unmute */ if (get_wcaps(codec, pin_nid) & AC_WCAP_OUT_AMP) snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE); - /* Enable pin out: some machines with GM965 gets broken output when - * the pin is disabled or changed while using with HDMI - */ + + if (spec->dyn_pin_out) + /* Disable pin out until stream is active */ + pin_out = 0; + else + /* Enable pin out: some machines with GM965 gets broken output + * when the pin is disabled or changed while using with HDMI + */ + pin_out = PIN_OUT; + snd_hda_codec_write(codec, pin_nid, 0, - AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT); + AC_VERB_SET_PIN_WIDGET_CONTROL, pin_out); }
static int hdmi_get_channel_count(struct hda_codec *codec, hda_nid_t cvt_nid) @@ -1535,6 +1548,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); hda_nid_t pin_nid = per_pin->pin_nid; bool non_pcm; + int pinctl;
non_pcm = check_non_pcm_per_cvt(codec, cvt_nid); per_pin->channels = substream->runtime->channels; @@ -1544,6 +1558,14 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
+ if (spec->dyn_pin_out) { + pinctl = snd_hda_codec_read(codec, pin_nid, 0, + AC_VERB_GET_PIN_WIDGET_CONTROL, 0); + snd_hda_codec_write(codec, pin_nid, 0, + AC_VERB_SET_PIN_WIDGET_CONTROL, + pinctl | PIN_OUT); + } + return hdmi_setup_stream(codec, cvt_nid, pin_nid, stream_tag, format); }
@@ -1563,6 +1585,7 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, int cvt_idx, pin_idx; struct hdmi_spec_per_cvt *per_cvt; struct hdmi_spec_per_pin *per_pin; + int pinctl;
if (hinfo->nid) { cvt_idx = cvt_nid_to_cvt_index(spec, hinfo->nid); @@ -1579,6 +1602,14 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, return -EINVAL; per_pin = get_pin(spec, pin_idx);
+ if (spec->dyn_pin_out) { + pinctl = snd_hda_codec_read(codec, per_pin->pin_nid, 0, + AC_VERB_GET_PIN_WIDGET_CONTROL, 0); + snd_hda_codec_write(codec, per_pin->pin_nid, 0, + AC_VERB_SET_PIN_WIDGET_CONTROL, + pinctl & ~PIN_OUT); + } + snd_hda_spdif_ctls_unassign(codec, pin_idx); per_pin->chmap_set = false; memset(per_pin->chmap, 0, sizeof(per_pin->chmap)); @@ -2570,6 +2601,7 @@ static int patch_nvhdmi(struct hda_codec *codec) return err;
spec = codec->spec; + spec->dyn_pin_out = true;
return 0; }