[alsa-devel] [RFC PATCH v3 2/3] ALSA: hda - add DP mst audio support
libin.yang at linux.intel.com
libin.yang at linux.intel.com
Thu Oct 13 09:49:36 CEST 2016
From: Libin Yang <libin.yang at linux.intel.com>
This patch adds the DP mst audio support.
Signed-off-by: Libin Yang <libin.yang at linux.intel.com>
---
sound/pci/hda/hda_codec.c | 4 +
sound/pci/hda/patch_hdmi.c | 243 +++++++++++++++++++++++++++++++++++----------
2 files changed, 196 insertions(+), 51 deletions(-)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index caa2c9d..8a6b0a2 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -468,6 +468,10 @@ static int read_pin_defaults(struct hda_codec *codec)
pin->nid = nid;
pin->cfg = snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_CONFIG_DEFAULT, 0);
+ /*
+ * all device entries are the same widget control so far
+ * fixme: if any codec is different, need fix here
+ */
pin->ctrl = snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_PIN_WIDGET_CONTROL,
0);
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index cf9bc042..422e05e 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -76,6 +76,7 @@ struct hdmi_spec_per_cvt {
struct hdmi_spec_per_pin {
hda_nid_t pin_nid;
+ int dev_id;
/* pin idx, different device entries on the same pin use the same idx */
int pin_nid_idx;
int num_mux_nids;
@@ -130,7 +131,23 @@ struct hdmi_spec {
struct snd_array cvts; /* struct hdmi_spec_per_cvt */
hda_nid_t cvt_nids[4]; /* only for haswell fix */
+ /*
+ * num_pins is the number of virtual pins
+ * for example, there are 3 pins, and each pin
+ * has 4 device entries, then the num_pins is 12
+ */
int num_pins;
+ /*
+ * num_nids is the number of real pins
+ * In the above example, num_nids is 3
+ */
+ int num_nids;
+ /*
+ * dev_num is the number of device entries
+ * on each pin.
+ * In the above example, dev_num is 4
+ */
+ int dev_num;
struct snd_array pins; /* struct hdmi_spec_per_pin */
struct hdmi_pcm pcm_rec[16];
struct mutex pcm_lock;
@@ -217,14 +234,26 @@ union audio_infoframe {
/* obtain hda_pcm object assigned to idx */
#define get_pcm_rec(spec, idx) (get_hdmi_pcm(spec, idx)->pcm)
-static int pin_nid_to_pin_index(struct hda_codec *codec, hda_nid_t pin_nid)
+static int pin_id_to_pin_index(struct hda_codec *codec,
+ hda_nid_t pin_nid, int dev_id)
{
struct hdmi_spec *spec = codec->spec;
int pin_idx;
+ struct hdmi_spec_per_pin *per_pin;
+
+ /*
+ * (dev_id == -1) means it is NON-MST pin
+ * return the first virtual pin on this port
+ */
+ if (dev_id == -1)
+ dev_id = 0;
- for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++)
- if (get_pin(spec, pin_idx)->pin_nid == pin_nid)
+ for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+ per_pin = get_pin(spec, pin_idx);
+ if ((per_pin->pin_nid == pin_nid) &&
+ (per_pin->dev_id == dev_id))
return pin_idx;
+ }
codec_warn(codec, "HDMI: pin nid %d not registered\n", pin_nid);
return -EINVAL;
@@ -724,10 +753,11 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll);
-static void check_presence_and_report(struct hda_codec *codec, hda_nid_t nid)
+static void check_presence_and_report(struct hda_codec *codec, hda_nid_t nid,
+ int dev_id)
{
struct hdmi_spec *spec = codec->spec;
- int pin_idx = pin_nid_to_pin_index(codec, nid);
+ int pin_idx = pin_id_to_pin_index(codec, nid, dev_id);
if (pin_idx < 0)
return;
@@ -738,7 +768,8 @@ static void check_presence_and_report(struct hda_codec *codec, hda_nid_t nid)
static void jack_callback(struct hda_codec *codec,
struct hda_jack_callback *jack)
{
- check_presence_and_report(codec, jack->nid);
+ /* hda_jack don't support DP MST */
+ check_presence_and_report(codec, jack->nid, 0);
}
static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
@@ -747,6 +778,12 @@ static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
struct hda_jack_tbl *jack;
int dev_entry = (res & AC_UNSOL_RES_DE) >> AC_UNSOL_RES_DE_SHIFT;
+ /*
+ * assume DP MST uses dyn_pcm_assign and acomp and
+ * never comes here
+ * if DP MST supports unsol event, below code need
+ * consider dev_entry
+ */
jack = snd_hda_jack_tbl_get_from_tag(codec, tag);
if (!jack)
return;
@@ -757,7 +794,8 @@ static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
codec->addr, jack->nid, dev_entry, !!(res & AC_UNSOL_RES_IA),
!!(res & AC_UNSOL_RES_PD), !!(res & AC_UNSOL_RES_ELDV));
- check_presence_and_report(codec, jack->nid);
+ /* hda_jack don't support DP MST */
+ check_presence_and_report(codec, jack->nid, 0);
}
static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)
@@ -970,28 +1008,60 @@ static int intel_cvt_id_to_mux_idx(struct hdmi_spec *spec,
* by any other pins.
*/
static void intel_not_share_assigned_cvt(struct hda_codec *codec,
- hda_nid_t pin_nid, int mux_idx)
+ hda_nid_t pin_nid,
+ int dev_id, int mux_idx)
{
struct hdmi_spec *spec = codec->spec;
hda_nid_t nid;
int cvt_idx, curr;
struct hdmi_spec_per_cvt *per_cvt;
+ struct hdmi_spec_per_pin *per_pin;
+ int pin_idx;
/* configure all pins, including "no physical connection" ones */
- for_each_hda_codec_node(nid, codec) {
- unsigned int wid_caps = get_wcaps(codec, nid);
- unsigned int wid_type = get_wcaps_type(wid_caps);
+ for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+ int dev_id_saved;
+ int dev_num;
+
+ per_pin = get_pin(spec, pin_idx);
+ /*
+ * pin not connected to monitor
+ * no need to operate on it
+ */
+ if (!per_pin->pcm)
+ continue;
- if (wid_type != AC_WID_PIN)
+ if ((per_pin->pin_nid == pin_nid) &&
+ (per_pin->dev_id == dev_id))
continue;
- if (nid == pin_nid)
+ /*
+ * if per_pin->dev_id >= dev_num,
+ * snd_hda_get_dev_select() will fail,
+ * and the following operation is unpredictable.
+ * So skip this situation.
+ */
+ dev_num = snd_hda_get_num_devices(codec, per_pin->pin_nid) + 1;
+ if (per_pin->dev_id >= dev_num)
continue;
+ nid = per_pin->pin_nid;
+
+ /*
+ * Calling this function should not impact
+ * on the device entry selection
+ * So let's save the dev id for each pin,
+ * and restore it when return
+ */
+ dev_id_saved = snd_hda_get_dev_select(codec, nid);
+ snd_hda_set_dev_select(codec, nid, per_pin->dev_id);
curr = snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_CONNECT_SEL, 0);
- if (curr != mux_idx)
+ if (curr != mux_idx) {
+ snd_hda_set_dev_select(codec, nid, dev_id_saved);
continue;
+ }
+
/* choose an unassigned converter. The conveters in the
* connection list are in the same order as in the codec.
@@ -1008,12 +1078,13 @@ static void intel_not_share_assigned_cvt(struct hda_codec *codec,
break;
}
}
+ snd_hda_set_dev_select(codec, nid, dev_id_saved);
}
}
/* 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)
+ hda_nid_t pin_nid, int dev_id, hda_nid_t cvt_nid)
{
int mux_idx;
struct hdmi_spec *spec = codec->spec;
@@ -1025,7 +1096,7 @@ static void intel_not_share_assigned_cvt_nid(struct hda_codec *codec,
*/
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);
+ intel_not_share_assigned_cvt(codec, pin_nid, dev_id, mux_idx);
}
/* skeleton caller of pin_cvt_fixup ops */
@@ -1140,6 +1211,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
per_pin->cvt_nid = per_cvt->cvt_nid;
hinfo->nid = per_cvt->cvt_nid;
+ snd_hda_set_dev_select(codec, per_pin->pin_nid, per_pin->dev_id);
snd_hda_codec_write_cache(codec, per_pin->pin_nid, 0,
AC_VERB_SET_CONNECT_SEL,
per_pin->mux_idx);
@@ -1198,6 +1270,7 @@ static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
return -EINVAL;
}
+ /* all the device entries on the same pin have the same conn list */
per_pin->num_mux_nids = snd_hda_get_connections(codec, pin_nid,
per_pin->mux_nids,
HDA_MAX_CONNECTIONS);
@@ -1215,13 +1288,13 @@ static int hdmi_find_pcm_slot(struct hdmi_spec *spec,
return per_pin->pin_nid_idx;
/* have a second try; check the "reserved area" over num_pins */
- for (i = spec->num_pins; i < spec->pcm_used; i++) {
+ for (i = spec->num_nids; i < spec->pcm_used; i++) {
if (!test_bit(i, &spec->pcm_bitmap))
return i;
}
/* the last try; check the empty slots in pins */
- for (i = 0; i < spec->num_pins; i++) {
+ for (i = 0; i < spec->num_nids; i++) {
if (!test_bit(i, &spec->pcm_bitmap))
return i;
}
@@ -1296,10 +1369,13 @@ static void hdmi_pcm_setup_pin(struct hdmi_spec *spec,
per_pin->cvt_nid = hinfo->nid;
mux_idx = hdmi_get_pin_cvt_mux(spec, per_pin, hinfo->nid);
- if (mux_idx < per_pin->num_mux_nids)
+ if (mux_idx < per_pin->num_mux_nids) {
+ snd_hda_set_dev_select(codec, per_pin->pin_nid,
+ per_pin->dev_id);
snd_hda_codec_write_cache(codec, per_pin->pin_nid, 0,
AC_VERB_SET_CONNECT_SEL,
mux_idx);
+ }
snd_hda_spdif_ctls_assign(codec, per_pin->pcm_idx, hinfo->nid);
non_pcm = check_non_pcm_per_cvt(codec, hinfo->nid);
@@ -1467,6 +1543,11 @@ static struct snd_jack *pin_idx_to_jack(struct hda_codec *codec,
if (per_pin->pcm_idx >= 0 && spec->dyn_pcm_assign)
jack = spec->pcm_rec[per_pin->pcm_idx].jack;
else if (!spec->dyn_pcm_assign) {
+ /*
+ * jack tbl doesn't support DP MST
+ * DP MST will use dyn_pcm_assign,
+ * so DP MST will never come here
+ */
jack_tbl = snd_hda_jack_tbl_get(codec, per_pin->pin_nid);
if (jack_tbl)
jack = jack_tbl->jack;
@@ -1485,9 +1566,9 @@ static void sync_eld_via_acomp(struct hda_codec *codec,
mutex_lock(&per_pin->lock);
eld->monitor_present = false;
- size = snd_hdac_acomp_get_eld(&codec->core, per_pin->pin_nid, -1,
- &eld->monitor_present, eld->eld_buffer,
- ELD_MAX_SIZE);
+ size = snd_hdac_acomp_get_eld(&codec->core, per_pin->pin_nid,
+ per_pin->dev_id, &eld->monitor_present,
+ eld->eld_buffer, ELD_MAX_SIZE);
if (size > 0) {
size = min(size, ELD_MAX_SIZE);
if (snd_hdmi_parse_eld(codec, &eld->info,
@@ -1565,38 +1646,81 @@ static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid)
int pin_idx;
struct hdmi_spec_per_pin *per_pin;
int err;
+ int dev_num, i;
caps = snd_hda_query_pin_caps(codec, pin_nid);
if (!(caps & (AC_PINCAP_HDMI | AC_PINCAP_DP)))
return 0;
+ /*
+ * For DP MST audio, Configuration Default is the same for
+ * all device entries on the same pin
+ */
config = snd_hda_codec_get_pincfg(codec, pin_nid);
if (get_defcfg_connect(config) == AC_JACK_PORT_NONE)
return 0;
- if (is_haswell_plus(codec))
- intel_haswell_fixup_connect_list(codec, pin_nid);
-
- pin_idx = spec->num_pins;
- per_pin = snd_array_new(&spec->pins);
- if (!per_pin)
- return -ENOMEM;
-
- per_pin->pin_nid = pin_nid;
- per_pin->non_pcm = false;
- if (spec->dyn_pcm_assign)
- per_pin->pcm_idx = -1;
- else {
- per_pin->pcm = get_hdmi_pcm(spec, pin_idx);
- per_pin->pcm_idx = pin_idx;
+ /*
+ * To simplify the implementation, malloc all
+ * the virtual pins in the initialization statically
+ */
+ if (is_haswell_plus(codec)) {
+ /*
+ * On Intel platforms, device entries number is
+ * changed dynamically. If there is a DP MST
+ * hub connected, the device entries number is 3.
+ * Otherwise, it is 1.
+ * Here we manually set dev_num to 3, so that
+ * we can initialize all the device entries when
+ * bootup statically.
+ */
+ dev_num = 3;
+ spec->dev_num = 3;
+ } else if (spec->dyn_pcm_assign && codec->dp_mst) {
+ dev_num = snd_hda_get_num_devices(codec, pin_nid) + 1;
+ /*
+ * spec->dev_num is the maxinum number of device entries
+ * among all the pins
+ */
+ spec->dev_num = (spec->dev_num > dev_num) ?
+ spec->dev_num : dev_num;
+ } else {
+ /*
+ * If the platform doesn't support DP MST,
+ * manually set dev_num to 1. This means
+ * the pin has only one device entry.
+ */
+ dev_num = 1;
+ spec->dev_num = 1;
}
- per_pin->pin_nid_idx = pin_idx;
- err = hdmi_read_pin_conn(codec, pin_idx);
- if (err < 0)
- return err;
+ for (i = 0; i < dev_num; i++) {
+ pin_idx = spec->num_pins;
+ per_pin = snd_array_new(&spec->pins);
- spec->num_pins++;
+ if (!per_pin)
+ return -ENOMEM;
+
+ if (spec->dyn_pcm_assign) {
+ per_pin->pcm = NULL;
+ per_pin->pcm_idx = -1;
+ } else {
+ per_pin->pcm = get_hdmi_pcm(spec, pin_idx);
+ per_pin->pcm_idx = pin_idx;
+ }
+ per_pin->pin_nid = pin_nid;
+ per_pin->pin_nid_idx = spec->num_nids;
+ per_pin->dev_id = i;
+ per_pin->non_pcm = false;
+ snd_hda_set_dev_select(codec, pin_nid, i);
+ if (is_haswell_plus(codec))
+ intel_haswell_fixup_connect_list(codec, pin_nid);
+ err = hdmi_read_pin_conn(codec, pin_idx);
+ if (err < 0)
+ return err;
+ spec->num_pins++;
+ }
+ spec->num_nids++;
return 0;
}
@@ -1744,7 +1868,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
/* Call sync_audio_rate to set the N/CTS/M manually if necessary */
/* Todo: add DP1.2 MST audio support later */
if (codec_has_acomp(codec))
- snd_hdac_sync_audio_rate(&codec->core, pin_nid, -1,
+ snd_hdac_sync_audio_rate(&codec->core, pin_nid, per_pin->dev_id,
runtime->rate);
non_pcm = check_non_pcm_per_cvt(codec, cvt_nid);
@@ -1762,6 +1886,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
pinctl | PIN_OUT);
}
+ /* snd_hda_set_dev_select() has been called before */
err = spec->ops.setup_stream(codec, cvt_nid, pin_nid,
stream_tag, format);
mutex_unlock(&spec->pcm_lock);
@@ -1897,17 +2022,23 @@ static bool is_hdmi_pcm_attached(struct hdac_device *hdac, int pcm_idx)
static int generic_hdmi_build_pcms(struct hda_codec *codec)
{
struct hdmi_spec *spec = codec->spec;
- int pin_idx;
+ int idx;
- for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+ /*
+ * for non-mst mode, pcm number is the same as before
+ * for DP MST mode, pcm number is (nid number + dev_num - 1)
+ * dev_num is the device entry number in a pin
+ *
+ */
+ for (idx = 0; idx < spec->num_nids + spec->dev_num - 1; idx++) {
struct hda_pcm *info;
struct hda_pcm_stream *pstr;
- info = snd_hda_codec_pcm_new(codec, "HDMI %d", pin_idx);
+ info = snd_hda_codec_pcm_new(codec, "HDMI %d", idx);
if (!info)
return -ENOMEM;
- spec->pcm_rec[pin_idx].pcm = info;
+ spec->pcm_rec[idx].pcm = info;
spec->pcm_used++;
info->pcm_type = HDA_PCM_TYPE_HDMI;
info->own_chmap = true;
@@ -1915,6 +2046,9 @@ static int generic_hdmi_build_pcms(struct hda_codec *codec)
pstr = &info->stream[SNDRV_PCM_STREAM_PLAYBACK];
pstr->substreams = 1;
pstr->ops = generic_ops;
+ /* pcm number is less than 16 */
+ if (spec->pcm_used >= 16)
+ break;
/* other pstr fields are set in open */
}
@@ -2070,7 +2204,9 @@ static int generic_hdmi_init(struct hda_codec *codec)
for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
hda_nid_t pin_nid = per_pin->pin_nid;
+ int dev_id = per_pin->dev_id;
+ snd_hda_set_dev_select(codec, pin_nid, dev_id);
hdmi_init_pin(codec, pin_nid);
if (!codec_has_acomp(codec))
snd_hda_jack_detect_enable_callback(codec, pin_nid,
@@ -2178,6 +2314,7 @@ static int alloc_generic_hdmi(struct hda_codec *codec)
return -ENOMEM;
spec->ops = generic_standard_hdmi_ops;
+ spec->dev_num = 1; /* initialize to 1 */
mutex_init(&spec->pcm_lock);
snd_hdac_register_chmap_ops(&codec->core, &spec->chmap);
@@ -2295,6 +2432,7 @@ static void intel_pin_eld_notify(void *audio_ptr, int port, int pipe)
{
struct hda_codec *codec = audio_ptr;
int pin_nid;
+ int dev_id = pipe;
/* we assume only from port-B to port-D */
if (port < 1 || port > 3)
@@ -2321,7 +2459,7 @@ static void intel_pin_eld_notify(void *audio_ptr, int port, int pipe)
return;
snd_hdac_i915_set_bclk(&codec->bus->core);
- check_presence_and_report(codec, pin_nid);
+ check_presence_and_report(codec, pin_nid, dev_id);
}
/* register i915 component pin_eld_notify callback */
@@ -2354,11 +2492,13 @@ static void i915_pin_cvt_fixup(struct hda_codec *codec,
hda_nid_t cvt_nid)
{
if (per_pin) {
+ snd_hda_set_dev_select(codec, per_pin->pin_nid,
+ per_pin->dev_id);
intel_verify_pin_cvt_connect(codec, per_pin);
intel_not_share_assigned_cvt(codec, per_pin->pin_nid,
- per_pin->mux_idx);
+ per_pin->dev_id, per_pin->mux_idx);
} else {
- intel_not_share_assigned_cvt_nid(codec, 0, cvt_nid);
+ intel_not_share_assigned_cvt_nid(codec, 0, 0, cvt_nid);
}
}
@@ -2378,6 +2518,8 @@ static int patch_i915_hsw_hdmi(struct hda_codec *codec)
if (err < 0)
return err;
spec = codec->spec;
+ codec->dp_mst = true;
+ spec->dyn_pcm_assign = true;
intel_haswell_enable_all_pins(codec, true);
intel_haswell_fixup_enable_dp12(codec);
@@ -2389,7 +2531,6 @@ static int patch_i915_hsw_hdmi(struct hda_codec *codec)
codec->core.link_power_control = 1;
codec->patch_ops.set_power_state = haswell_set_power_state;
- codec->dp_mst = true;
codec->depop_delay = 0;
codec->auto_runtime_pm = 1;
--
1.9.1
More information about the Alsa-devel
mailing list