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Commit a657f1d0 authored by Subhransu S. Prusty's avatar Subhransu S. Prusty Committed by Mark Brown
Browse files

ASoC: hdac_hdmi: Setup and start infoframe 



This patch uses hdmi framework in video to fill audio infoframe.

Signed-off-by: default avatarSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b0362adb

sound/soc/codecs/hdac_hdmi.c

+61 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/delay.h>

#include <linux/module.h>

#include <linux/pm_runtime.h>

#include <linux/hdmi.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/hdaudio_ext.h>
@@ -89,6 +90,60 @@ static int hdac_hdmi_setup_stream(struct hdac_ext_device *hdac, 
	return 0;

}



static void

hdac_hdmi_set_dip_index(struct hdac_ext_device *hdac, hda_nid_t pin_nid,

				int packet_index, int byte_index)

{

	int val;



	val = (packet_index << 5) | (byte_index & 0x1f);



	snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,

				AC_VERB_SET_HDMI_DIP_INDEX, val);

}



static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *hdac,

				hda_nid_t cvt_nid, hda_nid_t pin_nid)

{

	uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];

	struct hdmi_audio_infoframe frame;

	u8 *dip = (u8 *)&frame;

	int ret;

	int i;



	hdmi_audio_infoframe_init(&frame);



	/* Default stereo for now */

	frame.channels = 2;



	/* setup channel count */

	snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,

			    AC_VERB_SET_CVT_CHAN_COUNT, frame.channels - 1);



	ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));

	if (ret < 0)

		return ret;



	/* stop infoframe transmission */

	hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);

	snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,

			AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_DISABLE);





	/*  Fill infoframe. Index auto-incremented */

	hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);

	for (i = 0; i < sizeof(frame); i++)

		snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,

				AC_VERB_SET_HDMI_DIP_DATA, dip[i]);



	/* Start infoframe */

	hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);

	snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,

			AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_BEST);



	return 0;

}



static void hdac_hdmi_set_power_state(struct hdac_ext_device *edev,

		struct hdac_hdmi_dai_pin_map *dai_map, unsigned int pwr_state)

{
@@ -110,6 +165,7 @@ static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream, 
	struct hdac_hdmi_priv *hdmi = hdac->private_data;

	struct hdac_hdmi_dai_pin_map *dai_map;

	struct hdac_ext_dma_params *dd;

	int ret;



	if (dai->id > 0) {

		dev_err(&hdac->hdac.dev, "Only one dai supported as of now\n");
@@ -122,6 +178,11 @@ static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream, 
	dev_dbg(&hdac->hdac.dev, "stream tag from cpu dai %d format in cvt 0x%x\n",

			dd->stream_tag,	dd->format);



	ret = hdac_hdmi_setup_audio_infoframe(hdac, dai_map->cvt.nid,

						dai_map->pin.nid);

	if (ret < 0)

		return ret;



	return hdac_hdmi_setup_stream(hdac, dai_map->cvt.nid, dai_map->pin.nid,

					dd->stream_tag, dd->format);

}