@@ -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);
}