ASoC: OMAP: HDMI: Expand configuration of hw_params

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>

1 files changed, 115 insertions, 1 deletions

diff --git a/sound/soc/omap/omap-hdmi.c b/sound/soc/omap/omap-hdmi.c
index ff6132a9b7e8..fc4815a6efb1 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 = {