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.n...@ti.com>
---
sound/soc/omap/omap-hdmi.c | 116 +++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 115 insertions(+), 1 deletions(-)
diff --git a/sound/soc/omap/omap-hdmi.c b/sound/soc/omap/omap-hdmi.c
index ff6132a..fc4815a 100644
--- a/sound/soc/omap/omap-hdmi.c
+++ b/sound/soc/omap/omap-hdmi.c
@@ -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 = {
--
1.7.5.4
--
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