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ASoC: hdac_hdmi: Setup and start infoframe 

This patch uses hdmi framework in video to fill audio infoframe.

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 2015-11-10 18:42:09 +05:30 committed by Mark Brown
parent b0362adbeb
commit a657f1d05f
1 changed files with 61 additions and 0 deletions
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61
sound/soc/codecs/hdac_hdmi.c
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@ -21,6 +21,7 @@
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/hdmi.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/hdaudio_ext.h>
@ -89,6 +90,60 @@ static int hdac_hdmi_setup_stream(struct hdac_ext_device *hdac,
return 0;
}
static void
hdac_hdmi_set_dip_index(struct hdac_ext_device *hdac, hda_nid_t pin_nid,
int packet_index, int byte_index)
{
int val;
val = (packet_index << 5) | (byte_index & 0x1f);
snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
AC_VERB_SET_HDMI_DIP_INDEX, val);
}
static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *hdac,
hda_nid_t cvt_nid, hda_nid_t pin_nid)
{
uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
struct hdmi_audio_infoframe frame;
u8 *dip = (u8 *)&frame;
int ret;
int i;
hdmi_audio_infoframe_init(&frame);
/* Default stereo for now */
frame.channels = 2;
/* setup channel count */
snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,
AC_VERB_SET_CVT_CHAN_COUNT, frame.channels - 1);
ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
if (ret < 0)
return ret;
/* stop infoframe transmission */
hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);
snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_DISABLE);
/* Fill infoframe. Index auto-incremented */
hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);
for (i = 0; i < sizeof(frame); i++)
snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
AC_VERB_SET_HDMI_DIP_DATA, dip[i]);
/* Start infoframe */
hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);
snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_BEST);
return 0;
}
static void hdac_hdmi_set_power_state(struct hdac_ext_device *edev,
struct hdac_hdmi_dai_pin_map *dai_map, unsigned int pwr_state)
{
@ -110,6 +165,7 @@ static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream,
struct hdac_hdmi_priv *hdmi = hdac->private_data;
struct hdac_hdmi_dai_pin_map *dai_map;
struct hdac_ext_dma_params *dd;
int ret;
if (dai->id > 0) {
dev_err(&hdac->hdac.dev, "Only one dai supported as of now\n");
@ -122,6 +178,11 @@ static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream,
dev_dbg(&hdac->hdac.dev, "stream tag from cpu dai %d format in cvt 0x%x\n",
dd->stream_tag, dd->format);
ret = hdac_hdmi_setup_audio_infoframe(hdac, dai_map->cvt.nid,
dai_map->pin.nid);
if (ret < 0)
return ret;
return hdac_hdmi_setup_stream(hdac, dai_map->cvt.nid, dai_map->pin.nid,
dd->stream_tag, dd->format);
}