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 --- 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 = {