[alsa-devel] [PATCH 2/2] ALSA: hda - Switch HP DAC dynamically with indep-HP switch for VIA
Takashi Iwai
tiwai at suse.de
Mon Jul 18 17:07:41 CEST 2011
This patch changes the behavior of independent-HP enum switch. Now
instead of returning a busy error, the driver switches dynamically the
stream of the HP (and shared) DACs according to the current mode.
The logic is similar like the dual-mic ADC switch, but a bit more
complicated because of the presence of shared DAC.
Together with the change, a mutex is introduced to protect against the
possible races for the indep-HP mode setting.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
sound/pci/hda/patch_via.c | 159 +++++++++++++++++++++++++++++++++++----------
1 files changed, 125 insertions(+), 34 deletions(-)
diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index 76c6884..5b03426 100644
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -109,6 +109,11 @@ struct via_input {
#define VIA_MAX_ADCS 3
+enum {
+ STREAM_MULTI_OUT = (1 << 0),
+ STREAM_INDEP_HP = (1 << 1),
+};
+
struct via_spec {
/* codec parameterization */
const struct snd_kcontrol_new *mixers[6];
@@ -132,7 +137,8 @@ struct via_spec {
hda_nid_t hp_dac_nid;
hda_nid_t speaker_dac_nid;
int hp_indep_shared; /* indep HP-DAC is shared with side ch */
- int num_active_streams;
+ int opened_streams; /* STREAM_* bits */
+ int active_streams; /* STREAM_* bits */
int aamix_mode; /* loopback is enabled for output-path? */
/* Output-paths:
@@ -166,6 +172,12 @@ struct via_spec {
struct via_input inputs[AUTO_CFG_MAX_INS + 1];
unsigned int cur_mux[VIA_MAX_ADCS];
+ /* dynamic DAC switching */
+ unsigned int cur_dac_stream_tag;
+ unsigned int cur_dac_format;
+ unsigned int cur_hp_stream_tag;
+ unsigned int cur_hp_format;
+
/* dynamic ADC switching */
hda_nid_t cur_adc;
unsigned int cur_adc_stream_tag;
@@ -207,6 +219,8 @@ struct via_spec {
/* bind capture-volume */
struct hda_bind_ctls *bind_cap_vol;
struct hda_bind_ctls *bind_cap_sw;
+
+ struct mutex config_mutex;
};
static enum VIA_HDA_CODEC get_codec_type(struct hda_codec *codec);
@@ -218,6 +232,7 @@ static struct via_spec * via_new_spec(struct hda_codec *codec)
if (spec == NULL)
return NULL;
+ mutex_init(&spec->config_mutex);
codec->spec = spec;
spec->codec = codec;
spec->codec_type = get_codec_type(codec);
@@ -756,6 +771,67 @@ static int via_independent_hp_get(struct snd_kcontrol *kcontrol,
return 0;
}
+/* adjust spec->multiout setup according to the current flags */
+static void setup_playback_multi_pcm(struct via_spec *spec)
+{
+ const struct auto_pin_cfg *cfg = &spec->autocfg;
+ spec->multiout.num_dacs = cfg->line_outs + spec->smart51_nums;
+ spec->multiout.hp_nid = 0;
+ if (!spec->hp_independent_mode) {
+ if (!spec->hp_indep_shared)
+ spec->multiout.hp_nid = spec->hp_dac_nid;
+ } else {
+ if (spec->hp_indep_shared)
+ spec->multiout.num_dacs = cfg->line_outs - 1;
+ }
+}
+
+/* update DAC setups according to indep-HP switch;
+ * this function is called only when indep-HP is modified
+ */
+static void switch_indep_hp_dacs(struct hda_codec *codec)
+{
+ struct via_spec *spec = codec->spec;
+ int shared = spec->hp_indep_shared;
+ hda_nid_t shared_dac, hp_dac;
+
+ if (!spec->opened_streams)
+ return;
+
+ shared_dac = shared ? spec->multiout.dac_nids[shared] : 0;
+ hp_dac = spec->hp_dac_nid;
+ if (spec->hp_independent_mode) {
+ /* switch to indep-HP mode */
+ if (spec->active_streams & STREAM_MULTI_OUT) {
+ __snd_hda_codec_cleanup_stream(codec, hp_dac, 1);
+ __snd_hda_codec_cleanup_stream(codec, shared_dac, 1);
+ }
+ if (spec->active_streams & STREAM_INDEP_HP)
+ snd_hda_codec_setup_stream(codec, hp_dac,
+ spec->cur_hp_stream_tag, 0,
+ spec->cur_hp_format);
+ } else {
+ /* back to HP or shared-DAC */
+ if (spec->active_streams & STREAM_INDEP_HP)
+ __snd_hda_codec_cleanup_stream(codec, hp_dac, 1);
+ if (spec->active_streams & STREAM_MULTI_OUT) {
+ hda_nid_t dac;
+ int ch;
+ if (shared_dac) { /* reset mutli-ch DAC */
+ dac = shared_dac;
+ ch = shared * 2;
+ } else { /* reset HP DAC */
+ dac = hp_dac;
+ ch = 0;
+ }
+ snd_hda_codec_setup_stream(codec, dac,
+ spec->cur_dac_stream_tag, ch,
+ spec->cur_dac_format);
+ }
+ }
+ setup_playback_multi_pcm(spec);
+}
+
static int via_independent_hp_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@@ -763,13 +839,12 @@ static int via_independent_hp_put(struct snd_kcontrol *kcontrol,
struct via_spec *spec = codec->spec;
int cur, shared;
- /* no independent-hp status change during PCM playback is running */
- if (spec->num_active_streams)
- return -EBUSY;
-
+ mutex_lock(&spec->config_mutex);
cur = !!ucontrol->value.enumerated.item[0];
- if (spec->hp_independent_mode == cur)
+ if (spec->hp_independent_mode == cur) {
+ mutex_unlock(&spec->config_mutex);
return 0;
+ }
spec->hp_independent_mode = cur;
shared = spec->hp_indep_shared;
if (cur) {
@@ -786,6 +861,9 @@ static int via_independent_hp_put(struct snd_kcontrol *kcontrol,
activate_output_path(codec, &spec->hp_mix_path, true, false);
}
+ switch_indep_hp_dacs(codec);
+ mutex_unlock(&spec->config_mutex);
+
/* update jack power state */
set_widgets_power_state(codec);
via_hp_automute(codec);
@@ -948,7 +1026,7 @@ static void analog_low_current_mode(struct hda_codec *codec)
bool enable;
unsigned int verb, parm;
- enable = is_aa_path_mute(codec) && (spec->num_active_streams > 0);
+ enable = is_aa_path_mute(codec) && (spec->opened_streams != 0);
/* decide low current mode's verb & parameter */
switch (spec->codec_type) {
@@ -989,14 +1067,14 @@ static const struct hda_verb vt1708_init_verbs[] = {
{ }
};
-static void set_stream_active(struct hda_codec *codec, bool active)
+static void set_stream_open(struct hda_codec *codec, int bit, bool active)
{
struct via_spec *spec = codec->spec;
if (active)
- spec->num_active_streams++;
+ spec->opened_streams |= bit;
else
- spec->num_active_streams--;
+ spec->opened_streams &= ~bit;
analog_low_current_mode(codec);
}
@@ -1008,22 +1086,13 @@ static int via_playback_multi_pcm_open(struct hda_pcm_stream *hinfo,
const struct auto_pin_cfg *cfg = &spec->autocfg;
int err;
- spec->multiout.hp_nid = 0;
spec->multiout.num_dacs = cfg->line_outs + spec->smart51_nums;
- if (!spec->hp_independent_mode) {
- if (!spec->hp_indep_shared)
- spec->multiout.hp_nid = spec->hp_dac_nid;
- } else {
- if (spec->hp_indep_shared)
- spec->multiout.num_dacs = cfg->line_outs - 1;
- }
spec->multiout.max_channels = spec->multiout.num_dacs * 2;
- set_stream_active(codec, true);
+ set_stream_open(codec, STREAM_MULTI_OUT, true);
err = snd_hda_multi_out_analog_open(codec, &spec->multiout, substream,
hinfo);
if (err < 0) {
- spec->multiout.hp_nid = 0;
- set_stream_active(codec, false);
+ set_stream_open(codec, STREAM_MULTI_OUT, false);
return err;
}
return 0;
@@ -1033,10 +1102,7 @@ static int via_playback_multi_pcm_close(struct hda_pcm_stream *hinfo,
struct hda_codec *codec,
struct snd_pcm_substream *substream)
{
- struct via_spec *spec = codec->spec;
-
- spec->multiout.hp_nid = 0;
- set_stream_active(codec, false);
+ set_stream_open(codec, STREAM_MULTI_OUT, false);
return 0;
}
@@ -1048,9 +1114,7 @@ static int via_playback_hp_pcm_open(struct hda_pcm_stream *hinfo,
if (snd_BUG_ON(!spec->hp_dac_nid))
return -EINVAL;
- if (!spec->hp_independent_mode || spec->multiout.hp_nid)
- return -EBUSY;
- set_stream_active(codec, true);
+ set_stream_open(codec, STREAM_INDEP_HP, true);
return 0;
}
@@ -1058,7 +1122,7 @@ static int via_playback_hp_pcm_close(struct hda_pcm_stream *hinfo,
struct hda_codec *codec,
struct snd_pcm_substream *substream)
{
- set_stream_active(codec, false);
+ set_stream_open(codec, STREAM_INDEP_HP, false);
return 0;
}
@@ -1070,8 +1134,15 @@ static int via_playback_multi_pcm_prepare(struct hda_pcm_stream *hinfo,
{
struct via_spec *spec = codec->spec;
+ mutex_lock(&spec->config_mutex);
+ setup_playback_multi_pcm(spec);
snd_hda_multi_out_analog_prepare(codec, &spec->multiout, stream_tag,
format, substream);
+ /* remember for dynamic DAC switch with indep-HP */
+ spec->active_streams |= STREAM_MULTI_OUT;
+ spec->cur_dac_stream_tag = stream_tag;
+ spec->cur_dac_format = format;
+ mutex_unlock(&spec->config_mutex);
vt1708_start_hp_work(spec);
return 0;
}
@@ -1084,8 +1155,14 @@ static int via_playback_hp_pcm_prepare(struct hda_pcm_stream *hinfo,
{
struct via_spec *spec = codec->spec;
- snd_hda_codec_setup_stream(codec, spec->hp_dac_nid,
- stream_tag, 0, format);
+ mutex_lock(&spec->config_mutex);
+ if (spec->hp_independent_mode)
+ snd_hda_codec_setup_stream(codec, spec->hp_dac_nid,
+ stream_tag, 0, format);
+ spec->active_streams |= STREAM_INDEP_HP;
+ spec->cur_hp_stream_tag = stream_tag;
+ spec->cur_hp_format = format;
+ mutex_unlock(&spec->config_mutex);
vt1708_start_hp_work(spec);
return 0;
}
@@ -1096,7 +1173,10 @@ static int via_playback_multi_pcm_cleanup(struct hda_pcm_stream *hinfo,
{
struct via_spec *spec = codec->spec;
+ mutex_lock(&spec->config_mutex);
snd_hda_multi_out_analog_cleanup(codec, &spec->multiout);
+ spec->active_streams &= ~STREAM_MULTI_OUT;
+ mutex_unlock(&spec->config_mutex);
vt1708_stop_hp_work(spec);
return 0;
}
@@ -1107,7 +1187,11 @@ static int via_playback_hp_pcm_cleanup(struct hda_pcm_stream *hinfo,
{
struct via_spec *spec = codec->spec;
- snd_hda_codec_setup_stream(codec, spec->hp_dac_nid, 0, 0, 0);
+ mutex_lock(&spec->config_mutex);
+ if (spec->hp_independent_mode)
+ snd_hda_codec_setup_stream(codec, spec->hp_dac_nid, 0, 0, 0);
+ spec->active_streams &= ~STREAM_INDEP_HP;
+ mutex_unlock(&spec->config_mutex);
vt1708_stop_hp_work(spec);
return 0;
}
@@ -1186,10 +1270,12 @@ static int via_dyn_adc_capture_pcm_prepare(struct hda_pcm_stream *hinfo,
struct via_spec *spec = codec->spec;
int adc_idx = spec->inputs[spec->cur_mux[0]].adc_idx;
+ mutex_lock(&spec->config_mutex);
spec->cur_adc = spec->adc_nids[adc_idx];
spec->cur_adc_stream_tag = stream_tag;
spec->cur_adc_format = format;
snd_hda_codec_setup_stream(codec, spec->cur_adc, stream_tag, 0, format);
+ mutex_unlock(&spec->config_mutex);
return 0;
}
@@ -1199,8 +1285,10 @@ static int via_dyn_adc_capture_pcm_cleanup(struct hda_pcm_stream *hinfo,
{
struct via_spec *spec = codec->spec;
+ mutex_lock(&spec->config_mutex);
snd_hda_codec_cleanup_stream(codec, spec->cur_adc);
spec->cur_adc = 0;
+ mutex_unlock(&spec->config_mutex);
return 0;
}
@@ -1210,7 +1298,9 @@ static bool via_dyn_adc_pcm_resetup(struct hda_codec *codec, int cur)
struct via_spec *spec = codec->spec;
int adc_idx = spec->inputs[cur].adc_idx;
hda_nid_t adc = spec->adc_nids[adc_idx];
+ bool ret = false;
+ mutex_lock(&spec->config_mutex);
if (spec->cur_adc && spec->cur_adc != adc) {
/* stream is running, let's swap the current ADC */
__snd_hda_codec_cleanup_stream(codec, spec->cur_adc, 1);
@@ -1218,9 +1308,10 @@ static bool via_dyn_adc_pcm_resetup(struct hda_codec *codec, int cur)
snd_hda_codec_setup_stream(codec, adc,
spec->cur_adc_stream_tag, 0,
spec->cur_adc_format);
- return true;
+ ret = true;
}
- return false;
+ mutex_unlock(&spec->config_mutex);
+ return ret;
}
static const struct hda_pcm_stream via_pcm_analog_playback = {
--
1.7.6
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