Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7e6aa220 authored by Ricardo Neri's avatar Ricardo Neri Committed by Liam Girdwood
Browse files

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: default avatarRicardo Neri <ricardo.neri@ti.com>
Acked-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarLiam Girdwood <lrg@ti.com>
parent a48d9b75

sound/soc/omap/omap-hdmi.c

+115 −1
Original line number Diff line number Diff line
@@ -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 = {