[alsa-devel] [RFC V2 PATCH 1/5] ALSA: hda - hdmi playback without monitor in dynamic pcm bind mode
libin.yang at linux.intel.com
libin.yang at linux.intel.com
Mon Nov 23 15:09:30 CET 2015
From: Libin Yang <libin.yang at linux.intel.com>
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.
Signed-off-by: Libin Yang <libin.yang at linux.intel.com>
---
sound/pci/hda/patch_hdmi.c | 171 +++++++++++++++++++++++++++++++++++++++++----
1 file changed, 157 insertions(+), 14 deletions(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 92e05fb..d0294bf 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -135,6 +135,7 @@ 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;
@@ -1331,6 +1332,11 @@ 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)
{
@@ -1339,7 +1345,11 @@ 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++) {
@@ -1348,6 +1358,8 @@ 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)
@@ -1360,9 +1372,10 @@ 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;
@@ -1388,6 +1401,20 @@ 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
@@ -1439,6 +1466,69 @@ 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
*/
@@ -1455,19 +1545,36 @@ 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;
@@ -1488,6 +1595,7 @@ 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);
@@ -1496,10 +1604,12 @@ 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;
@@ -1803,13 +1913,33 @@ 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;
struct i915_audio_component *acomp = codec->bus->core.audio_component;
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))
+ 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.
@@ -1838,7 +1968,7 @@ 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);
-
+ mutex_unlock(&spec->pcm_lock);
if (spec->dyn_pin_out) {
pinctl = snd_hda_codec_read(codec, pin_nid, 0,
AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
@@ -1847,7 +1977,10 @@ 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,
@@ -1878,9 +2011,17 @@ 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) {
@@ -1900,6 +2041,7 @@ 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;
@@ -2370,6 +2512,7 @@ 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);
--
1.9.1
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