diff options
author | Subhransu S. Prusty <subhransu.s.prusty@intel.com> | 2015-11-10 18:42:09 +0530 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2015-11-21 13:58:19 +0000 |
commit | a657f1d05fd3eadb61f771e659f5d42940003d93 (patch) | |
tree | cb0bfaa4ba677e48c292122aaf3da3ae69523013 /sound/soc/codecs/hdac_hdmi.c | |
parent | b0362adbeb95b57d9739b0744772eaf9feaa6e5e (diff) | |
download | linux-stable-a657f1d05fd3eadb61f771e659f5d42940003d93.tar.gz linux-stable-a657f1d05fd3eadb61f771e659f5d42940003d93.tar.bz2 linux-stable-a657f1d05fd3eadb61f771e659f5d42940003d93.zip |
ASoC: hdac_hdmi: Setup and start infoframe
This patch uses hdmi framework in video to fill audio infoframe.
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/hdac_hdmi.c')
-rw-r--r-- | sound/soc/codecs/hdac_hdmi.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index f96bd2fb634b..c02e6d3a6314 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -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); } |