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Quelle  simplehdmi.c   Sprache: C

 
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Non-generic simple HDMI codec support
 */


#include <linux/slab.h>
#include <linux/module.h>
#include "hdmi_local.h"
#include "hda_jack.h"

int snd_hda_hdmi_simple_build_pcms(struct hda_codec *codec)
{
 struct hdmi_spec *spec = codec->spec;
 struct hda_pcm *info;
 unsigned int chans;
 struct hda_pcm_stream *pstr;
 struct hdmi_spec_per_cvt *per_cvt;

 per_cvt = get_cvt(spec, 0);
 chans = get_wcaps(codec, per_cvt->cvt_nid);
 chans = get_wcaps_channels(chans);

 info = snd_hda_codec_pcm_new(codec, "HDMI 0");
 if (!info)
  return -ENOMEM;
 spec->pcm_rec[0].pcm = info;
 info->pcm_type = HDA_PCM_TYPE_HDMI;
 pstr = &info->stream[SNDRV_PCM_STREAM_PLAYBACK];
 *pstr = spec->pcm_playback;
 pstr->nid = per_cvt->cvt_nid;
 if (pstr->channels_max <= 2 && chans && chans <= 16)
  pstr->channels_max = chans;

 return 0;
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_build_pcms, "SND_HDA_CODEC_HDMI");

/* unsolicited event for jack sensing */
void snd_hda_hdmi_simple_unsol_event(struct hda_codec *codec,
         unsigned int res)
{
 snd_hda_jack_set_dirty_all(codec);
 snd_hda_jack_report_sync(codec);
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_unsol_event, "SND_HDA_CODEC_HDMI");

static void free_hdmi_jack_priv(struct snd_jack *jack)
{
 struct hdmi_pcm *pcm = jack->private_data;

 pcm->jack = NULL;
}

static int simple_hdmi_build_jack(struct hda_codec *codec)
{
 char hdmi_str[32] = "HDMI/DP";
 struct hdmi_spec *spec = codec->spec;
 struct snd_jack *jack;
 struct hdmi_pcm *pcmp = get_hdmi_pcm(spec, 0);
 int pcmdev = pcmp->pcm->device;
 int err;

 if (pcmdev > 0)
  sprintf(hdmi_str + strlen(hdmi_str), ",pcm=%d", pcmdev);

 err = snd_jack_new(codec->card, hdmi_str, SND_JACK_AVOUT, &jack,
      truefalse);
 if (err < 0)
  return err;

 pcmp->jack = jack;
 jack->private_data = pcmp;
 jack->private_free = free_hdmi_jack_priv;
 return 0;
}

int snd_hda_hdmi_simple_build_controls(struct hda_codec *codec)
{
 struct hdmi_spec *spec = codec->spec;
 struct hdmi_spec_per_cvt *per_cvt;
 int err;

 per_cvt = get_cvt(spec, 0);
 err = snd_hda_create_dig_out_ctls(codec, per_cvt->cvt_nid,
       per_cvt->cvt_nid,
       HDA_PCM_TYPE_HDMI);
 if (err < 0)
  return err;
 return simple_hdmi_build_jack(codec);
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_build_controls, "SND_HDA_CODEC_HDMI");

int snd_hda_hdmi_simple_init(struct hda_codec *codec)
{
 struct hdmi_spec *spec = codec->spec;
 struct hdmi_spec_per_pin *per_pin = get_pin(spec, 0);
 hda_nid_t pin = per_pin->pin_nid;

 snd_hda_codec_write(codec, pin, 0,
       AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
 /* some codecs require to unmute the pin */
 if (get_wcaps(codec, pin) & AC_WCAP_OUT_AMP)
  snd_hda_codec_write(codec, pin, 0, AC_VERB_SET_AMP_GAIN_MUTE,
        AMP_OUT_UNMUTE);
 snd_hda_jack_detect_enable(codec, pin, per_pin->dev_id);
 return 0;
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_init, "SND_HDA_CODEC_HDMI");

void snd_hda_hdmi_simple_remove(struct hda_codec *codec)
{
 struct hdmi_spec *spec = codec->spec;

 snd_array_free(&spec->pins);
 snd_array_free(&spec->cvts);
 kfree(spec);
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_remove, "SND_HDA_CODEC_HDMI");

int snd_hda_hdmi_simple_pcm_open(struct hda_pcm_stream *hinfo,
     struct hda_codec *codec,
     struct snd_pcm_substream *substream)
{
 struct hdmi_spec *spec = codec->spec;

 if (spec->hw_constraints_channels) {
  snd_pcm_hw_constraint_list(substream->runtime, 0,
    SNDRV_PCM_HW_PARAM_CHANNELS,
    spec->hw_constraints_channels);
 } else {
  snd_pcm_hw_constraint_step(substream->runtime, 0,
        SNDRV_PCM_HW_PARAM_CHANNELS, 2);
 }

 return snd_hda_multi_out_dig_open(codec, &spec->multiout);
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_pcm_open, "SND_HDA_CODEC_HDMI");

static int simple_playback_pcm_close(struct hda_pcm_stream *hinfo,
         struct hda_codec *codec,
         struct snd_pcm_substream *substream)
{
 struct hdmi_spec *spec = codec->spec;

 return snd_hda_multi_out_dig_close(codec, &spec->multiout);
}

static int simple_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
           struct hda_codec *codec,
           unsigned int stream_tag,
           unsigned int format,
           struct snd_pcm_substream *substream)
{
 struct hdmi_spec *spec = codec->spec;

 return snd_hda_multi_out_dig_prepare(codec, &spec->multiout,
          stream_tag, format, substream);
}

static const struct hda_pcm_stream simple_pcm_playback = {
 .substreams = 1,
 .channels_min = 2,
 .channels_max = 2,
 .ops = {
  .open = snd_hda_hdmi_simple_pcm_open,
  .close = simple_playback_pcm_close,
  .prepare = simple_playback_pcm_prepare
 },
};

int snd_hda_hdmi_simple_probe(struct hda_codec *codec,
         hda_nid_t cvt_nid, hda_nid_t pin_nid)
{
 struct hdmi_spec *spec;
 struct hdmi_spec_per_cvt *per_cvt;
 struct hdmi_spec_per_pin *per_pin;

 spec = kzalloc(sizeof(*spec), GFP_KERNEL);
 if (!spec)
  return -ENOMEM;

 spec->codec = codec;
 codec->spec = spec;
 snd_array_init(&spec->pins, sizeof(struct hdmi_spec_per_pin), 1);
 snd_array_init(&spec->cvts, sizeof(struct hdmi_spec_per_cvt), 1);

 spec->multiout.num_dacs = 0;  /* no analog */
 spec->multiout.max_channels = 2;
 spec->multiout.dig_out_nid = cvt_nid;
 spec->num_cvts = 1;
 spec->num_pins = 1;
 per_pin = snd_array_new(&spec->pins);
 per_cvt = snd_array_new(&spec->cvts);
 if (!per_pin || !per_cvt) {
  snd_hda_hdmi_simple_remove(codec);
  return -ENOMEM;
 }
 per_cvt->cvt_nid = cvt_nid;
 per_pin->pin_nid = pin_nid;
 spec->pcm_playback = simple_pcm_playback;

 return 0;
}
EXPORT_SYMBOL_NS_GPL(snd_hda_hdmi_simple_probe, "SND_HDA_CODEC_HDMI");

/*
 * driver entries
 */


enum { MODEL_VIA };

/* VIA HDMI Implementation */
#define VIAHDMI_CVT_NID 0x02 /* audio converter1 */
#define VIAHDMI_PIN_NID 0x03 /* HDMI output pin1 */

static int simplehdmi_probe(struct hda_codec *codec,
       const struct hda_device_id *id)
{
 switch (id->driver_data) {
 case MODEL_VIA:
  return snd_hda_hdmi_simple_probe(codec, VIAHDMI_CVT_NID,
       VIAHDMI_PIN_NID);
 default:
  return -EINVAL;
 }
}

static const struct hda_codec_ops simplehdmi_codec_ops = {
 .probe = simplehdmi_probe,
 .remove = snd_hda_hdmi_simple_remove,
 .build_controls = snd_hda_hdmi_simple_build_controls,
 .build_pcms = snd_hda_hdmi_simple_build_pcms,
 .init = snd_hda_hdmi_simple_init,
 .unsol_event = snd_hda_hdmi_simple_unsol_event,
};

static const struct hda_device_id snd_hda_id_simplehdmi[] = {
 HDA_CODEC_ID_MODEL(0x11069f80, "VX900 HDMI/DP", MODEL_VIA),
 HDA_CODEC_ID_MODEL(0x11069f81, "VX900 HDMI/DP", MODEL_VIA),
 {} /* terminator */
};

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Simple HDMI HD-audio codec support");

static struct hda_codec_driver simplehdmi_driver = {
 .id = snd_hda_id_simplehdmi,
 .ops = &simplehdmi_codec_ops,
};

module_hda_codec_driver(simplehdmi_driver);

Messung V0.5
C=97 H=100 G=98

¤ Dauer der Verarbeitung: 0.12 Sekunden  (vorverarbeitet)  ¤

*© Formatika GbR, Deutschland






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