Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-15 08:31:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

ASoC: hdac_hdmi: Add multichannel support

Browse Source 
To support multichannel hdac hdmi driver registers with HDA
channel map framework. Channel count and channel slot verbs are
programmed by using the chmap helpers/ops.  The channel
allocation is then programmed in the audio infoframe as per CEA
spec.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Subhransu S. Prusty 2016-04-14 10:07:30 +05:30 committed by Mark Brown
parent b7756edeb7
commit bcced70478
1 changed files with 41 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
sound/soc/codecs/hdac_hdmi.c
View File

@ -29,6 +29,7 @@
#include <sound/hdaudio_ext.h>
#include <sound/hda_i915.h>
#include <sound/pcm_drm_eld.h>
#include <sound/hda_chmap.h>
#include "../../hda/local.h"
#include "hdac_hdmi.h"
@ -82,6 +83,10 @@ struct hdac_hdmi_pin {
struct hdac_ext_device *edev;
int repoll_count;
struct delayed_work work;
struct mutex lock;
bool chmap_set;
unsigned char chmap[8]; /* ALSA API channel-map */
int channels; /* current number of channels */
};
struct hdac_hdmi_pcm {
@ -106,6 +111,7 @@ struct hdac_hdmi_priv {
int num_pin;
int num_cvt;
struct mutex pin_mutex;
struct hdac_chmap chmap;
};
static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)
@ -284,26 +290,31 @@ static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *hdac,
int i;
const u8 *eld_buf;
u8 conn_type;
int channels = 2;
int channels, ca;
list_for_each_entry(pin, &hdmi->pin_list, head) {
if (pin->nid == pin_nid)
break;
}
ca = snd_hdac_channel_allocation(&hdac->hdac, pin->eld.info.spk_alloc,
pin->channels, pin->chmap_set, true, pin->chmap);
channels = snd_hdac_get_active_channels(ca);
hdmi->chmap.ops.set_channel_count(&hdac->hdac, cvt_nid, channels);
snd_hdac_setup_channel_mapping(&hdmi->chmap, pin->nid, false, ca,
pin->channels, pin->chmap, pin->chmap_set);
eld_buf = pin->eld.eld_buffer;
conn_type = drm_eld_get_conn_type(eld_buf);
/* setup channel count */
snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,
AC_VERB_SET_CVT_CHAN_COUNT, channels - 1);
switch (conn_type) {
case DRM_ELD_CONN_TYPE_HDMI:
hdmi_audio_infoframe_init(&frame);
/* Default stereo for now */
frame.channels = channels;
frame.channel_allocation = ca;
ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
if (ret < 0)
@ -317,7 +328,7 @@ static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *hdac,
dp_ai.len = 0x1b;
dp_ai.ver = 0x11 << 2;
dp_ai.CC02_CT47 = channels - 1;
dp_ai.CA = 0;
dp_ai.CA = ca;
dip = (u8 *)&dp_ai;
break;
@ -376,17 +387,23 @@ static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream,
struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
struct hdac_hdmi_priv *hdmi = hdac->private_data;
struct hdac_hdmi_dai_pin_map *dai_map;
struct hdac_hdmi_pin *pin;
struct hdac_ext_dma_params *dd;
int ret;
dai_map = &hdmi->dai_map[dai->id];
pin = dai_map->pin;
dd = (struct hdac_ext_dma_params *)snd_soc_dai_get_dma_data(dai, substream);
dev_dbg(&hdac->hdac.dev, "stream tag from cpu dai %d format in cvt 0x%x\n",
dd->stream_tag, dd->format);
mutex_lock(&pin->lock);
pin->channels = substream->runtime->channels;
ret = hdac_hdmi_setup_audio_infoframe(hdac, dai_map->cvt->nid,
dai_map->pin->nid);
mutex_unlock(&pin->lock);
if (ret < 0)
return ret;
@ -646,6 +663,10 @@ static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
snd_hdac_codec_write(&hdac->hdac, dai_map->pin->nid, 0,
AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
mutex_lock(&dai_map->pin->lock);
dai_map->pin->channels = 0;
mutex_unlock(&dai_map->pin->lock);
dai_map->pin = NULL;
}
}
@ -653,10 +674,19 @@ static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
static int
hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)
{
unsigned int chans;
struct hdac_ext_device *edev = to_ehdac_device(hdac);
struct hdac_hdmi_priv *hdmi = edev->private_data;
int err;
/* Only stereo supported as of now */
cvt->params.channels_min = cvt->params.channels_max = 2;
chans = get_wcaps(hdac, cvt->nid);
chans = get_wcaps_channels(chans);
cvt->params.channels_min = 2;
cvt->params.channels_max = chans;
if (chans > hdmi->chmap.channels_max)
hdmi->chmap.channels_max = chans;
err = snd_hdac_query_supported_pcm(hdac, cvt->nid,
&cvt->params.rates,
@ -1136,6 +1166,7 @@ static int hdac_hdmi_add_pin(struct hdac_ext_device *edev, hda_nid_t nid)
hdmi->num_pin++;
pin->edev = edev;
mutex_init(&pin->lock);
INIT_DELAYED_WORK(&pin->work, hdac_hdmi_repoll_eld);
return 0;
@ -1506,6 +1537,7 @@ static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
return -ENOMEM;
edev->private_data = hdmi_priv;
snd_hdac_register_chmap_ops(codec, &hdmi_priv->chmap);
dev_set_drvdata(&codec->dev, edev);