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ALSA: hda - hdmi playback without monitor in dynamic pcm bind mode

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Pulseaudio requires open pcm successfully when probing.

This patch handles playback without monitor in dynamic pcm assignment
mode. It tries to open/prepare/close pcm successfully even there is
no pin bound to the PCM. On the meantime, it will try to find a proper
converter for the PCM.

As pcm is This patch introduces a pcm_lock in struct hdmi_spec.
This lock is used to protect:
1. the variables in struct hdmi_spec;
2. other variables shared for dynamic pcm assignment mode
3. device entry selection. As each device entry is represented by
   a separate struct struct hdmi_spec_per_pin, the lock in per_pin
   is not enough. Please see details below.

MST audio device entry operation:
1. select device entry on the pin
2. operate on the pin nid

Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Libin Yang 2015-12-16 13:42:42 +08:00 committed by Takashi Iwai
parent 6590faaba4
commit 42b2987079
1 changed files with 157 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

171
sound/pci/hda/patch_hdmi.c
View File

@ -139,6 +139,7 @@ struct hdmi_spec {
int num_pins;
struct snd_array pins; /* struct hdmi_spec_per_pin */
struct hda_pcm *pcm_rec[16];
struct mutex pcm_lock;
unsigned int channels_max; /* max over all cvts */
struct hdmi_eld temp_eld;
@ -1341,6 +1342,11 @@ static int hdmi_setup_stream(struct hda_codec *codec, hda_nid_t cvt_nid,
return 0;
}
/* Try to find an available converter
* If pin_idx is less then zero, just try to find an available converter.
* Otherwise, try to find an available converter and get the cvt mux index
* of the pin.
*/
static int hdmi_choose_cvt(struct hda_codec *codec,
int pin_idx, int *cvt_id, int *mux_id)
{
@ -1349,7 +1355,11 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
struct hdmi_spec_per_cvt *per_cvt = NULL;
int cvt_idx, mux_idx = 0;
per_pin = get_pin(spec, pin_idx);
/* pin_idx < 0 means no pin will be bound to the converter */
if (pin_idx < 0)
per_pin = NULL;
else
per_pin = get_pin(spec, pin_idx);
/* Dynamically assign converter to stream */
for (cvt_idx = 0; cvt_idx < spec->num_cvts; cvt_idx++) {
@ -1358,6 +1368,8 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
/* Must not already be assigned */
if (per_cvt->assigned)
continue;
if (per_pin == NULL)
break;
/* Must be in pin's mux's list of converters */
for (mux_idx = 0; mux_idx < per_pin->num_mux_nids; mux_idx++)
if (per_pin->mux_nids[mux_idx] == per_cvt->cvt_nid)
@ -1370,9 +1382,10 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
/* No free converters */
if (cvt_idx == spec->num_cvts)
return -ENODEV;
return -EBUSY;
per_pin->mux_idx = mux_idx;
if (per_pin != NULL)
per_pin->mux_idx = mux_idx;
if (cvt_id)
*cvt_id = cvt_idx;
@ -1398,6 +1411,20 @@ static void intel_verify_pin_cvt_connect(struct hda_codec *codec,
mux_idx);
}
/* get the mux index for the converter of the pins
* converter's mux index is the same for all pins on Intel platform
*/
static int intel_cvt_id_to_mux_idx(struct hdmi_spec *spec,
hda_nid_t cvt_nid)
{
int i;
for (i = 0; i < spec->num_cvts; i++)
if (spec->cvt_nids[i] == cvt_nid)
return i;
return -EINVAL;
}
/* Intel HDMI workaround to fix audio routing issue:
* For some Intel display codecs, pins share the same connection list.
* So a conveter can be selected by multiple pins and playback on any of these
@ -1449,6 +1476,69 @@ static void intel_not_share_assigned_cvt(struct hda_codec *codec,
}
}
/* A wrapper of intel_not_share_asigned_cvt() */
static void intel_not_share_assigned_cvt_nid(struct hda_codec *codec,
hda_nid_t pin_nid, hda_nid_t cvt_nid)
{
int mux_idx;
struct hdmi_spec *spec = codec->spec;
if (!is_haswell_plus(codec) && !is_valleyview_plus(codec))
return;
/* On Intel platform, the mapping of converter nid to
* mux index of the pins are always the same.
* The pin nid may be 0, this means all pins will not
* share the converter.
*/
mux_idx = intel_cvt_id_to_mux_idx(spec, cvt_nid);
if (mux_idx >= 0)
intel_not_share_assigned_cvt(codec, pin_nid, mux_idx);
}
/* called in hdmi_pcm_open when no pin is assigned to the PCM
* in dyn_pcm_assign mode.
*/
static int hdmi_pcm_open_no_pin(struct hda_pcm_stream *hinfo,
struct hda_codec *codec,
struct snd_pcm_substream *substream)
{
struct hdmi_spec *spec = codec->spec;
struct snd_pcm_runtime *runtime = substream->runtime;
int cvt_idx;
struct hdmi_spec_per_cvt *per_cvt = NULL;
int err;
err = hdmi_choose_cvt(codec, -1, &cvt_idx, NULL);
if (err)
return err;
per_cvt = get_cvt(spec, cvt_idx);
per_cvt->assigned = 1;
hinfo->nid = per_cvt->cvt_nid;
intel_not_share_assigned_cvt_nid(codec, 0, per_cvt->cvt_nid);
/* todo: setup spdif ctls assign */
/* Initially set the converter's capabilities */
hinfo->channels_min = per_cvt->channels_min;
hinfo->channels_max = per_cvt->channels_max;
hinfo->rates = per_cvt->rates;
hinfo->formats = per_cvt->formats;
hinfo->maxbps = per_cvt->maxbps;
/* Store the updated parameters */
runtime->hw.channels_min = hinfo->channels_min;
runtime->hw.channels_max = hinfo->channels_max;
runtime->hw.formats = hinfo->formats;
runtime->hw.rates = hinfo->rates;
snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS, 2);
return 0;
}
/*
* HDA PCM callbacks
*/
@ -1465,19 +1555,36 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
int err;
/* Validate hinfo */
mutex_lock(&spec->pcm_lock);
pin_idx = hinfo_to_pin_index(codec, hinfo);
if (snd_BUG_ON(pin_idx < 0))
return -EINVAL;
per_pin = get_pin(spec, pin_idx);
eld = &per_pin->sink_eld;
if (!spec->dyn_pcm_assign) {
if (snd_BUG_ON(pin_idx < 0)) {
mutex_unlock(&spec->pcm_lock);
return -EINVAL;
}
} else {
/* no pin is assigned to the PCM
* PA need pcm open successfully when probe
*/
if (pin_idx < 0) {
err = hdmi_pcm_open_no_pin(hinfo, codec, substream);
mutex_unlock(&spec->pcm_lock);
return err;
}
}
err = hdmi_choose_cvt(codec, pin_idx, &cvt_idx, &mux_idx);
if (err < 0)
if (err < 0) {
mutex_unlock(&spec->pcm_lock);
return err;
}
per_cvt = get_cvt(spec, cvt_idx);
/* Claim converter */
per_cvt->assigned = 1;
per_pin = get_pin(spec, pin_idx);
per_pin->cvt_nid = per_cvt->cvt_nid;
hinfo->nid = per_cvt->cvt_nid;
@ -1498,6 +1605,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
hinfo->formats = per_cvt->formats;
hinfo->maxbps = per_cvt->maxbps;
eld = &per_pin->sink_eld;
/* Restrict capabilities by ELD if this isn't disabled */
if (!static_hdmi_pcm && eld->eld_valid) {
snd_hdmi_eld_update_pcm_info(&eld->info, hinfo);
@ -1506,10 +1614,12 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
per_cvt->assigned = 0;
hinfo->nid = 0;
snd_hda_spdif_ctls_unassign(codec, pin_idx);
mutex_unlock(&spec->pcm_lock);
return -ENODEV;
}
}
mutex_unlock(&spec->pcm_lock);
/* Store the updated parameters */
runtime->hw.channels_min = hinfo->channels_min;
runtime->hw.channels_max = hinfo->channels_max;
@ -1854,13 +1964,34 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
{
hda_nid_t cvt_nid = hinfo->nid;
struct hdmi_spec *spec = codec->spec;
int pin_idx = hinfo_to_pin_index(codec, hinfo);
struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
hda_nid_t pin_nid = per_pin->pin_nid;
int pin_idx;
struct hdmi_spec_per_pin *per_pin;
hda_nid_t pin_nid;
struct snd_pcm_runtime *runtime = substream->runtime;
bool non_pcm;
int pinctl;
int err;
mutex_lock(&spec->pcm_lock);
pin_idx = hinfo_to_pin_index(codec, hinfo);
if (spec->dyn_pcm_assign && pin_idx < 0) {
/* when dyn_pcm_assign and pcm is not bound to a pin
* skip pin setup and return 0 to make audio playback
* be ongoing
*/
intel_not_share_assigned_cvt_nid(codec, 0, cvt_nid);
snd_hda_codec_setup_stream(codec, cvt_nid,
stream_tag, 0, format);
mutex_unlock(&spec->pcm_lock);
return 0;
}
if (snd_BUG_ON(pin_idx < 0)) {
mutex_unlock(&spec->pcm_lock);
return -EINVAL;
}
per_pin = get_pin(spec, pin_idx);
pin_nid = per_pin->pin_nid;
if (is_haswell_plus(codec) || is_valleyview_plus(codec)) {
/* Verify pin:cvt selections to avoid silent audio after S3.
* After S3, the audio driver restores pin:cvt selections
@ -1885,7 +2016,6 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
mutex_unlock(&per_pin->lock);
if (spec->dyn_pin_out) {
pinctl = snd_hda_codec_read(codec, pin_nid, 0,
AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
@ -1894,7 +2024,10 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
pinctl | PIN_OUT);
}
return spec->ops.setup_stream(codec, cvt_nid, pin_nid, stream_tag, format);
err = spec->ops.setup_stream(codec, cvt_nid, pin_nid,
stream_tag, format);
mutex_unlock(&spec->pcm_lock);
return err;
}
static int generic_hdmi_playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
@ -1925,9 +2058,17 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,
per_cvt->assigned = 0;
hinfo->nid = 0;
mutex_lock(&spec->pcm_lock);
pin_idx = hinfo_to_pin_index(codec, hinfo);
if (snd_BUG_ON(pin_idx < 0))
if (spec->dyn_pcm_assign && pin_idx < 0) {
mutex_unlock(&spec->pcm_lock);
return 0;
}
if (snd_BUG_ON(pin_idx < 0)) {
mutex_unlock(&spec->pcm_lock);
return -EINVAL;
}
per_pin = get_pin(spec, pin_idx);
if (spec->dyn_pin_out) {
@ -1947,6 +2088,7 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,
per_pin->setup = false;
per_pin->channels = 0;
mutex_unlock(&per_pin->lock);
mutex_unlock(&spec->pcm_lock);
}
return 0;
@ -2461,6 +2603,7 @@ static int patch_generic_hdmi(struct hda_codec *codec)
return -ENOMEM;
spec->ops = generic_standard_hdmi_ops;
mutex_init(&spec->pcm_lock);
codec->spec = spec;
hdmi_array_init(spec, 4);