[alsa-devel] Applied "ASoC: hdac_hdmi: Setup and start infoframe" to the asoc tree

[Mark Brown]

The patch

   ASoC: hdac_hdmi: Setup and start infoframe

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a657f1d05fd3eadb61f771e659f5d42940003d93 Mon Sep 17 00:00:00 2001
From: "Subhransu S. Prusty" <subhransu.s.prusty at intel.com>
Date: Tue, 10 Nov 2015 18:42:09 +0530
Subject: [PATCH] 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 at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/hdac_hdmi.c | 61 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index f96bd2f..c02e6d3 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);
 }
-- 
2.6.1