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>

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index f96bd2f..c02e6d3 100644 (file)
--- 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);
 }