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ASoC: OMAP: HDMI: Expand configuration of hw_params

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Expand the configuration of the hw_params to include the IEC-60958
channel status word and the CEA-861 audio infoframe. The configuration
of such structures depends on the snd_pcm_hw_params received. A
omap_dss_audio is used to pass the configuration parameters to DSS.

Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@ti.com>
This commit is contained in:
Ricardo Neri 2012-05-18 01:42:38 -05:00 committed by Liam Girdwood
parent a48d9b7586
commit 7e6aa22079
1 changed files with 115 additions and 1 deletions
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116
sound/soc/omap/omap-hdmi.c
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@ -30,6 +30,8 @@
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/asound.h>
#include <sound/asoundef.h>
#include <video/omapdss.h>
#include <plat/dma.h>
@ -40,6 +42,9 @@
struct hdmi_priv {
struct omap_pcm_dma_data dma_params;
struct omap_dss_audio dss_audio;
struct snd_aes_iec958 iec;
struct snd_cea_861_aud_if cea;
struct omap_dss_device *dssdev;
};
@ -72,6 +77,8 @@ static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
struct snd_aes_iec958 *iec = &priv->iec;
struct snd_cea_861_aud_if *cea = &priv->cea;
int err = 0;
switch (params_format(params)) {
@ -82,7 +89,8 @@ static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
priv->dma_params.packet_size = 32;
break;
default:
err = -EINVAL;
dev_err(dai->dev, "format not supported!\n");
return -EINVAL;
}
priv->dma_params.data_type = OMAP_DMA_DATA_TYPE_S32;
@ -90,6 +98,109 @@ static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
snd_soc_dai_set_dma_data(dai, substream,
&priv->dma_params);
/*
* fill the IEC-60958 channel status word
*/
/* specify IEC-60958-3 (commercial use) */
iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
/* specify that the audio is LPCM*/
iec->status[0] &= ~IEC958_AES0_NONAUDIO;
iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE;
iec->status[0] |= IEC958_AES1_PRO_MODE_NOTID;
iec->status[1] = IEC958_AES1_CON_GENERAL;
iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC;
iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC;
switch (params_rate(params)) {
case 32000:
iec->status[3] |= IEC958_AES3_CON_FS_32000;
break;
case 44100:
iec->status[3] |= IEC958_AES3_CON_FS_44100;
break;
case 48000:
iec->status[3] |= IEC958_AES3_CON_FS_48000;
break;
case 88200:
iec->status[3] |= IEC958_AES3_CON_FS_88200;
break;
case 96000:
iec->status[3] |= IEC958_AES3_CON_FS_96000;
break;
case 176400:
iec->status[3] |= IEC958_AES3_CON_FS_176400;
break;
case 192000:
iec->status[3] |= IEC958_AES3_CON_FS_192000;
break;
default:
dev_err(dai->dev, "rate not supported!\n");
return -EINVAL;
}
/* specify the clock accuracy */
iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM;
/*
* specify the word length. The same word length value can mean
* two different lengths. Hence, we need to specify the maximum
* word length as well.
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16;
iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20;
iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24;
break;
default:
dev_err(dai->dev, "format not supported!\n");
return -EINVAL;
}
/*
* Fill the CEA-861 audio infoframe (see spec for details)
*/
cea->db1_ct_cc = (params_channels(params) - 1)
& CEA861_AUDIO_INFOFRAME_DB1CC;
cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
cea->db3 = 0; /* not used, all zeros */
/*
* The OMAP HDMI IP requires to use the 8-channel channel code when
* transmitting more than two channels.
*/
if (params_channels(params) == 2)
cea->db4_ca = 0x0;
else
cea->db4_ca = 0x13;
cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
/* the expression is trivial but makes clear what we are doing */
cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
priv->dss_audio.iec = iec;
priv->dss_audio.cea = cea;
err = priv->dssdev->driver->audio_config(priv->dssdev,
&priv->dss_audio);
return err;
}
@ -127,6 +238,9 @@ static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
.startup = omap_hdmi_dai_startup,
.hw_params = omap_hdmi_dai_hw_params,
.prepare = omap_hdmi_dai_prepare,
.trigger = omap_hdmi_dai_trigger,
.shutdown = omap_hdmi_dai_shutdown,
};
static struct snd_soc_dai_driver omap_hdmi_dai = {