[PATCH v3 0/6] ASoC: Add HDA HDMI codec driver

[PATCH v3 0/6] ASoC: Add HDA HDMI codec driver

[Vinod Koul]

Hi all,

This is third series of the HDA HDMI patches. This attempts to add HDA
based HDMI driver and uses i915 component framework to interact with
display for power up/down. The communication to codec is over HDA link

If at all we need a change in interface, we can i915 interface which can be
made transparent to users

Due to dependency on already merged patches in ALSA tree, it would be best
if this get merged thru ALSA tree

Changes in v3:
- add comment in hdmi driver and changlog on basic support and eventual
  addition of features

Changes in v2:
- remove infoframe open code and use video one
- add pm on/off i915 triggers
- add ext_dma_params struct

*** SUBJECT HERE ***

*** BLURB HERE ***

Subhransu S. Prusty (6):
  ALSA: hdac: structure definition for ext_dma_params
  ASoC: hdac-hdmi: Add hdmi driver
  ASoC: hdac_hdmi: Add PM support for HDMI
  ASoC: hdac_hdmi: Add hdac hdmi dai ops
  ASoC: hdac_hdmi: Setup and start infoframe
  ASoC: hdac_hdmi: Use i915 component framework for PM

 include/sound/hdaudio_ext.h  |   6 +
 sound/soc/codecs/Kconfig     |   5 +
 sound/soc/codecs/Makefile    |   2 +
 sound/soc/codecs/hdac_hdmi.c | 660 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 673 insertions(+)
 create mode 100644 sound/soc/codecs/hdac_hdmi.c

-- 
2.4.3

[PATCH v3 1/6] ALSA: hdac: structure definition for ext_dma_params

[Vinod Koul]

From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>

This extends the structure definition of ext_device and adds
definition for dma_params which will be used when hdmi codec.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 include/sound/hdaudio_ext.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index a4cadd9c297a..425af0674557 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -186,9 +186,15 @@ struct hdac_ext_device {
 	/* codec ops */
 	struct hdac_ext_codec_ops ops;
 
+	struct snd_card *card;
+	void *scodec;
 	void *private_data;
 };
 
+struct hdac_ext_dma_params {
+	u32 format;
+	u8 stream_tag;
+};
 #define to_ehdac_device(dev) (container_of((dev), \
 				 struct hdac_ext_device, hdac))
 /*
-- 
2.4.3

[PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Vinod Koul]

From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>

This adds HDA based HDMI driver to be used in platforms like SKL
and onwards

Register the hdmi driver with hda bus and register dais.

Also parse the widget and initialize identified pin and converter
widgets.

For simplification, currently only one pin and one converter
widget are enabled on board, as well as limit the rates supported
to simples ones and not based on ELD.  This things will come
eventually once basic support for this is merged

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 sound/soc/codecs/Kconfig     |   5 +
 sound/soc/codecs/Makefile    |   2 +
 sound/soc/codecs/hdac_hdmi.c | 349 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 356 insertions(+)
 create mode 100644 sound/soc/codecs/hdac_hdmi.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 70e5a75901aa..00662ff1c280 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -66,6 +66,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_ES8328_I2C if I2C
 	select SND_SOC_GTM601
 	select SND_SOC_ICS43432
+	select SND_SOC_HDAC_HDMI
 	select SND_SOC_ISABELLE if I2C
 	select SND_SOC_JZ4740_CODEC
 	select SND_SOC_LM4857 if I2C
@@ -446,6 +447,10 @@ config SND_SOC_BT_SCO
 config SND_SOC_DMIC
 	tristate
 
+config SND_SOC_HDAC_HDMI
+	tristate
+	select SND_HDA_EXT_CORE
+
 config SND_SOC_ES8328
 	tristate "Everest Semi ES8328 CODEC"
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index be1491acb6ae..d2cc5ea67e2c 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -59,6 +59,7 @@ snd-soc-es8328-i2c-objs := es8328-i2c.o
 snd-soc-es8328-spi-objs := es8328-spi.o
 snd-soc-gtm601-objs := gtm601.o
 snd-soc-ics43432-objs := ics43432.o
+snd-soc-hdac-hdmi-objs := hdac_hdmi.o
 snd-soc-isabelle-objs := isabelle.o
 snd-soc-jz4740-codec-objs := jz4740.o
 snd-soc-l3-objs := l3.o
@@ -251,6 +252,7 @@ obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
 obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
 obj-$(CONFIG_SND_SOC_GTM601)    += snd-soc-gtm601.o
 obj-$(CONFIG_SND_SOC_ICS43432)	+= snd-soc-ics43432.o
+obj-$(CONFIG_SND_SOC_HDAC_HDMI) += snd-soc-hdac-hdmi.o
 obj-$(CONFIG_SND_SOC_ISABELLE)	+= snd-soc-isabelle.o
 obj-$(CONFIG_SND_SOC_JZ4740_CODEC)	+= snd-soc-jz4740-codec.o
 obj-$(CONFIG_SND_SOC_L3)	+= snd-soc-l3.o
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
new file mode 100644
index 000000000000..bda91a31f839
--- /dev/null
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -0,0 +1,349 @@
+/*
+ *  hdac_hdmi.c - ASoc HDA-HDMI codec driver for Intel platforms
+ *
+ *  Copyright (C) 2014-2015 Intel Corp
+ *  Author: Samreen Nilofer <samreen.nilofer@intel.com>
+ *	    Subhransu S. Prusty <subhransu.s.prusty@intel.com>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/hdaudio_ext.h>
+#include "../../hda/local.h"
+
+#define PIN_OUT			(AC_PINCTL_OUT_EN)
+#define HDA_MAX_CONNECTIONS     32
+
+struct hdac_hdmi_cvt_params {
+	unsigned int channels_min;
+	unsigned int channels_max;
+	u32 rates;
+	u64 formats;
+	unsigned int maxbps;
+};
+
+struct hdac_hdmi_cvt {
+	hda_nid_t nid;
+	struct hdac_hdmi_cvt_params params;
+};
+
+struct hdac_hdmi_pin {
+	hda_nid_t nid;
+	int num_mux_nids;
+	hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
+};
+
+struct hdac_hdmi_dai_pin_map {
+	int dai_id;
+	struct hdac_hdmi_pin pin;
+	struct hdac_hdmi_cvt cvt;
+};
+
+struct hdac_hdmi_priv {
+	hda_nid_t pin_nid[3];
+	hda_nid_t cvt_nid[3];
+	struct hdac_hdmi_dai_pin_map dai_map[3];
+};
+
+static int hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)
+{
+	int err;
+
+	/* Only stereo supported as of now */
+	cvt->params.channels_min = cvt->params.channels_max = 2;
+
+	err = snd_hdac_query_supported_pcm(hdac, cvt->nid,
+			&cvt->params.rates,
+			&cvt->params.formats,
+			&cvt->params.maxbps);
+	if (err < 0)
+		dev_err(&hdac->dev, "Failed to query pcm params for nid: %d\n", cvt->nid);
+
+	return err;
+}
+
+static int hdac_hdmi_query_pin_connlist(struct hdac_ext_device *hdac,
+		struct hdac_hdmi_pin *pin)
+{
+	if (!(get_wcaps(&hdac->hdac, pin->nid) & AC_WCAP_CONN_LIST)) {
+		dev_warn(&hdac->hdac.dev, "HDMI: pin %d wcaps %#x does not support connection list\n",
+			   pin->nid, get_wcaps(&hdac->hdac, pin->nid));
+		return -EINVAL;
+	}
+
+	pin->num_mux_nids = snd_hdac_get_connections(&hdac->hdac, pin->nid,
+			pin->mux_nids, HDA_MAX_CONNECTIONS);
+	if (pin->num_mux_nids == 0) {
+		dev_err(&hdac->hdac.dev, "No connections found\n");
+		return -ENODEV;
+	}
+
+	dev_dbg(&hdac->hdac.dev, "num_mux_nids %d for pin %d\n", pin->num_mux_nids, pin->nid);
+
+	return pin->num_mux_nids;
+}
+
+static void hdac_hdmi_fill_widget_info(struct snd_soc_dapm_widget *w,
+		enum snd_soc_dapm_type id, const char *wname, const char *stream)
+{
+	w->id = id;
+	w->name = wname;
+	w->sname = stream;
+	w->reg = SND_SOC_NOPM;
+	w->shift = 0;
+	w->kcontrol_news = NULL;
+	w->num_kcontrols = 0;
+	w->priv = NULL;
+}
+
+static void hdac_hdmi_fill_route(struct snd_soc_dapm_route *route,
+		const char *sink, const char *control, const char *src)
+{
+	route->sink = sink;
+	route->source = src;
+	route->control = control;
+	route->connected = NULL;
+}
+
+static void create_fill_widget_route_map(struct snd_soc_dapm_context *dapm,
+		struct hdac_hdmi_dai_pin_map *dai_map)
+{
+	struct snd_soc_dapm_route route[1];
+	struct snd_soc_dapm_widget widgets[2] = { {0} };
+
+	memset(&route, 0, sizeof(route));
+
+	hdac_hdmi_fill_widget_info(&widgets[0], snd_soc_dapm_output,
+			"hif1 Output", NULL);
+	hdac_hdmi_fill_widget_info(&widgets[1], snd_soc_dapm_aif_in,
+			"Coverter 1", "hif1");
+
+	hdac_hdmi_fill_route(&route[0], "hif1 Output", NULL, "Coverter 1");
+
+	snd_soc_dapm_new_controls(dapm, widgets, ARRAY_SIZE(widgets));
+	snd_soc_dapm_add_routes(dapm, route, ARRAY_SIZE(route));
+}
+
+static int hdac_hdmi_init_dai_map(struct hdac_ext_device *edev,
+		struct hdac_hdmi_dai_pin_map *dai_map,
+		hda_nid_t pin_nid, hda_nid_t cvt_nid, int dai_id)
+{
+	int ret;
+
+	dai_map->dai_id = dai_id;
+	dai_map->pin.nid = pin_nid;
+
+	ret = hdac_hdmi_query_pin_connlist(edev, &dai_map->pin);
+	if (ret < 0) {
+		dev_err(&edev->hdac.dev, "Error querying connection list: %d\n",
+				ret);
+		return ret;
+	}
+
+	dai_map->cvt.nid = cvt_nid;
+
+	/* Enable out path for this pin widget */
+	snd_hdac_codec_write(&edev->hdac, pin_nid, 0,
+			AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
+
+	/* Enable transmission */
+	snd_hdac_codec_write(&edev->hdac, cvt_nid, 0,
+			AC_VERB_SET_DIGI_CONVERT_1, 1);
+
+	/* Category Code (CC) to zero */
+	snd_hdac_codec_write(&edev->hdac, cvt_nid, 0,
+			AC_VERB_SET_DIGI_CONVERT_2, 0);
+
+	snd_hdac_codec_write(&edev->hdac, pin_nid, 0,
+			AC_VERB_SET_CONNECT_SEL, 0);
+
+	return hdac_hdmi_query_cvt_params(&edev->hdac, &dai_map->cvt);
+}
+
+/*
+ * Parse all nodes and store the cvt/pin nids in array
+ * Add one time initialization for pin and cvt widgets
+ */
+static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev)
+{
+	hda_nid_t nid;
+	int i;
+	struct hdac_device *hdac = &edev->hdac;
+	struct hdac_hdmi_priv *hdmi = edev->private_data;
+	int cvt_nid = 0, pin_nid = 0;
+
+	hdac->num_nodes = snd_hdac_get_sub_nodes(hdac, hdac->afg, &nid);
+	if (!nid || hdac->num_nodes < 0) {
+		dev_warn(&hdac->dev, "HDMI: failed to get afg sub nodes\n");
+		return -EINVAL;
+	}
+
+	hdac->start_nid = nid;
+
+	dev_dbg(&hdac->dev, "Number of nodes %d\n", hdac->num_nodes);
+
+	for (i = 0; i < hdac->num_nodes; i++, nid++) {
+		unsigned int caps;
+		unsigned int type;
+
+		caps = get_wcaps(hdac, nid);
+		type = get_wcaps_type(caps);
+
+		dev_dbg(&hdac->dev, "nid: %d type: %d\n", nid, type);
+
+		if (!(caps & AC_WCAP_DIGITAL))
+			continue;
+
+		switch (type) {
+
+		case AC_WID_AUD_OUT:
+			hdmi->cvt_nid[cvt_nid] = nid;
+			cvt_nid++;
+			break;
+
+		case AC_WID_PIN:
+			hdmi->pin_nid[pin_nid] = nid;
+			pin_nid++;
+			break;
+		}
+	}
+
+	hdac->end_nid = nid;
+
+	dev_dbg(&hdac->dev, "Number of pin nid: %d cvt nid: %d\n",
+			pin_nid, cvt_nid);
+
+	if (!pin_nid || !cvt_nid)
+		return -EIO;
+
+	/*
+	 * Currently on board only 1 pin and 1 converter enabled for
+	 * simplification, more will be added eventually
+	 * So using fixed map for dai_id:pin:cvt
+	 */
+	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
+			hdmi->cvt_nid[0], 0);
+}
+
+static int hdmi_codec_probe(struct snd_soc_codec *codec)
+{
+	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
+	struct hdac_hdmi_priv *hdmi = edev->private_data;
+	struct snd_soc_dapm_context *dapm =
+		snd_soc_component_get_dapm(&codec->component);
+
+	edev->scodec = codec;
+
+	create_fill_widget_route_map(dapm, &hdmi->dai_map[0]);
+
+	/* Imp: Store the card pointer in hda_codec */
+	edev->card = dapm->card->snd_card;
+
+	return 0;
+}
+
+static struct snd_soc_codec_driver hdmi_hda_codec = {
+	.probe		= hdmi_codec_probe,
+	.idle_bias_off	= true,
+};
+
+static struct snd_soc_dai_driver hdmi_dais[] = {
+	{	.name = "intel-hdmi-hif1",
+		.playback = {
+			.stream_name = "hif1",
+			.channels_min = 2,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_32000 |
+				SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
+				SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
+				SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |
+				SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+
+		},
+	},
+};
+
+static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
+{
+	struct hdac_device *codec = &edev->hdac;
+	struct hdac_hdmi_priv *hdmi_priv;
+	int ret = 0;
+
+	dev_dbg(&codec->dev, "%s vendor_id:rev_id %x:%x\n", __func__,
+			codec->vendor_id, codec->revision_id);
+
+	hdmi_priv = devm_kzalloc(&codec->dev, sizeof(*hdmi_priv), GFP_KERNEL);
+	if (hdmi_priv == NULL)
+		return -ENOMEM;
+
+	edev->private_data = hdmi_priv;
+
+	dev_set_drvdata(&codec->dev, edev);
+
+	ret = hdac_hdmi_parse_and_map_nid(edev);
+	if (ret < 0)
+		return ret;
+
+	/* ASoC specific initialization */
+	return snd_soc_register_codec(&codec->dev, &hdmi_hda_codec,
+			hdmi_dais, ARRAY_SIZE(hdmi_dais));
+}
+
+static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev)
+{
+	snd_soc_unregister_codec(&edev->hdac.dev);
+
+	return 0;
+}
+
+static const struct hda_device_id hdmi_list[] = {
+	HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),
+	{}
+};
+
+MODULE_DEVICE_TABLE(hdaudio, hdmi_list);
+
+static struct hdac_ext_driver hdmi_driver = {
+	. hdac = {
+		.driver = {
+			.name   = "HDMI HDA Codec",
+		},
+		.id_table       = hdmi_list,
+	},
+	.probe          = hdac_hdmi_dev_probe,
+	.remove         = hdac_hdmi_dev_remove,
+};
+
+static int __init hdmi_init(void)
+{
+	return snd_hda_ext_driver_register(&hdmi_driver);
+}
+
+static void __exit hdmi_exit(void)
+{
+	snd_hda_ext_driver_unregister(&hdmi_driver);
+}
+
+module_init(hdmi_init);
+module_exit(hdmi_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("HDMI HD codec");
+MODULE_AUTHOR("Samreen Nilofer<samreen.nilofer@intel.com>");
+MODULE_AUTHOR("Subhransu S. Prusty<subhransu.s.prusty@intel.com>");
-- 
2.4.3

[PATCH v3 3/6] ASoC: hdac_hdmi: Add PM support for HDMI

[Vinod Koul]

From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>

Power up/down the AFG node during runtime resume/suspend.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 sound/soc/codecs/hdac_hdmi.c | 64 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index bda91a31f839..bc50030e16d7 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -60,6 +60,13 @@ struct hdac_hdmi_priv {
 	struct hdac_hdmi_dai_pin_map dai_map[3];
 };
 
+static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)
+{
+	struct hdac_device *hdac = container_of(dev, struct hdac_device, dev);
+
+	return container_of(hdac, struct hdac_ext_device, hdac);
+}
+
 static int hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)
 {
 	int err;
@@ -254,11 +261,28 @@ static int hdmi_codec_probe(struct snd_soc_codec *codec)
 	/* Imp: Store the card pointer in hda_codec */
 	edev->card = dapm->card->snd_card;
 
+	/*
+	 * hdac_device core already sets the state to active and calls
+	 * get_noresume. So enable runtime and set the device to suspend.
+	 */
+	pm_runtime_enable(&edev->hdac.dev);
+	pm_runtime_put(&edev->hdac.dev);
+	pm_runtime_suspend(&edev->hdac.dev);
+
+	return 0;
+}
+
+static int hdmi_codec_remove(struct snd_soc_codec *codec)
+{
+	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
+
+	pm_runtime_disable(&edev->hdac.dev);
 	return 0;
 }
 
 static struct snd_soc_codec_driver hdmi_hda_codec = {
 	.probe		= hdmi_codec_probe,
+	.remove		= hdmi_codec_remove,
 	.idle_bias_off	= true,
 };
 
@@ -312,6 +336,45 @@ static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int hdac_hdmi_runtime_suspend(struct device *dev)
+{
+	struct hdac_ext_device *edev = to_hda_ext_device(dev);
+	struct hdac_device *hdac = &edev->hdac;
+
+	dev_dbg(dev, "Enter: %s\n", __func__);
+
+	/* Power down afg */
+	if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D3))
+		snd_hdac_codec_write(hdac, hdac->afg, 0,
+			AC_VERB_SET_POWER_STATE, AC_PWRST_D3);
+
+	return 0;
+}
+
+static int hdac_hdmi_runtime_resume(struct device *dev)
+{
+	struct hdac_ext_device *edev = to_hda_ext_device(dev);
+	struct hdac_device *hdac = &edev->hdac;
+
+	dev_dbg(dev, "Enter: %s\n", __func__);
+
+	/* Power up afg */
+	if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D0))
+		snd_hdac_codec_write(hdac, hdac->afg, 0,
+			AC_VERB_SET_POWER_STATE, AC_PWRST_D0);
+
+	return 0;
+}
+#else
+#define hdac_hdmi_runtime_suspend NULL
+#define hdac_hdmi_runtime_resume NULL
+#endif
+
+static const struct dev_pm_ops hdac_hdmi_pm = {
+	SET_RUNTIME_PM_OPS(hdac_hdmi_runtime_suspend, hdac_hdmi_runtime_resume, NULL)
+};
+
 static const struct hda_device_id hdmi_list[] = {
 	HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),
 	{}
@@ -323,6 +386,7 @@ static struct hdac_ext_driver hdmi_driver = {
 	. hdac = {
 		.driver = {
 			.name   = "HDMI HDA Codec",
+			.pm = &hdac_hdmi_pm,
 		},
 		.id_table       = hdmi_list,
 	},
-- 
2.4.3

[PATCH v3 4/6] ASoC: hdac_hdmi: Add hdac hdmi dai ops

[Vinod Koul]

From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>

The DAI ops are used fr triggering HDMI streams and configuring
the parameters

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 sound/soc/codecs/hdac_hdmi.c | 162 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index bc50030e16d7..40328757d568 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -26,7 +26,10 @@
 #include <sound/hdaudio_ext.h>
 #include "../../hda/local.h"
 
+#define AMP_OUT_MUTE		0xb080
+#define AMP_OUT_UNMUTE		0xb000
 #define PIN_OUT			(AC_PINCTL_OUT_EN)
+
 #define HDA_MAX_CONNECTIONS     32
 
 struct hdac_hdmi_cvt_params {
@@ -67,6 +70,156 @@ static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)
 	return container_of(hdac, struct hdac_ext_device, hdac);
 }
 
+static int hdac_hdmi_setup_stream(struct hdac_ext_device *hdac,
+				hda_nid_t cvt_nid, hda_nid_t pin_nid,
+				u32 stream_tag, int format)
+{
+	unsigned int val;
+
+	dev_dbg(&hdac->hdac.dev, "cvt nid %d pnid %d stream %d format 0x%x\n",
+			cvt_nid, pin_nid, stream_tag, format);
+
+	val = (stream_tag << 4);
+
+	snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,
+				AC_VERB_SET_CHANNEL_STREAMID, val);
+	snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,
+				AC_VERB_SET_STREAM_FORMAT, format);
+
+	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)
+{
+	/* Power up pin widget */
+	if (!snd_hdac_check_power_state(&edev->hdac, dai_map->pin.nid, pwr_state))
+		snd_hdac_codec_write(&edev->hdac, dai_map->pin.nid, 0,
+			AC_VERB_SET_POWER_STATE, pwr_state);
+
+	/* Power up converter */
+	if (!snd_hdac_check_power_state(&edev->hdac, dai_map->cvt.nid, pwr_state))
+		snd_hdac_codec_write(&edev->hdac, dai_map->cvt.nid, 0,
+			AC_VERB_SET_POWER_STATE, pwr_state);
+}
+
+static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
+	struct hdac_hdmi_priv *hdmi = hdac->private_data;
+	struct hdac_hdmi_dai_pin_map *dai_map;
+	struct hdac_ext_dma_params *dd;
+
+	if (dai->id > 0) {
+		dev_err(&hdac->hdac.dev, "Only one dai supported as of now\n");
+		return -ENODEV;
+	}
+
+	dai_map = &hdmi->dai_map[dai->id];
+
+	dd = (struct hdac_ext_dma_params *)snd_soc_dai_get_dma_data(dai, substream);
+	dev_dbg(&hdac->hdac.dev, "stream tag from cpu dai %d format in cvt 0x%x\n",
+			dd->stream_tag,	dd->format);
+
+	return hdac_hdmi_setup_stream(hdac, dai_map->cvt.nid, dai_map->pin.nid,
+					dd->stream_tag, dd->format);
+}
+
+static int hdac_hdmi_set_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *hparams, struct snd_soc_dai *dai)
+{
+	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
+	struct hdac_ext_dma_params *dd;
+
+	if (dai->id > 0) {
+		dev_err(&hdac->hdac.dev, "Only one dai supported as of now\n");
+		return -ENODEV;
+	}
+
+	dd = kzalloc(sizeof(*dd), GFP_KERNEL);
+	dd->format = snd_hdac_calc_stream_format(params_rate(hparams),
+			params_channels(hparams), params_format(hparams),
+			24, 0);
+
+	snd_soc_dai_set_dma_data(dai, substream, (void *)dd);
+
+	return 0;
+}
+
+static int hdac_hdmi_playback_cleanup(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct hdac_ext_device *edev = snd_soc_dai_get_drvdata(dai);
+	struct hdac_ext_dma_params *dd;
+	struct hdac_hdmi_priv *hdmi = edev->private_data;
+	struct hdac_hdmi_dai_pin_map *dai_map;
+
+	dai_map = &hdmi->dai_map[dai->id];
+
+	snd_hdac_codec_write(&edev->hdac, dai_map->cvt.nid, 0,
+				AC_VERB_SET_CHANNEL_STREAMID, 0);
+	snd_hdac_codec_write(&edev->hdac, dai_map->cvt.nid, 0,
+				AC_VERB_SET_STREAM_FORMAT, 0);
+
+	dd = (struct hdac_ext_dma_params *)snd_soc_dai_get_dma_data(dai, substream);
+	snd_soc_dai_set_dma_data(dai, substream, NULL);
+
+	kfree(dd);
+
+	return 0;
+}
+
+static int hdac_hdmi_pcm_open(struct snd_pcm_substream *substream,
+			struct snd_soc_dai *dai)
+{
+	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
+	struct hdac_hdmi_priv *hdmi = hdac->private_data;
+	struct hdac_hdmi_dai_pin_map *dai_map;
+	int val;
+
+	if (dai->id > 0) {
+		dev_err(&hdac->hdac.dev, "Only one dai supported as of now\n");
+		return -ENODEV;
+	}
+
+	dai_map = &hdmi->dai_map[dai->id];
+
+	val = snd_hdac_codec_read(&hdac->hdac, dai_map->pin.nid, 0,
+					AC_VERB_GET_PIN_SENSE, 0);
+	dev_info(&hdac->hdac.dev, "Val for AC_VERB_GET_PIN_SENSE: %x\n", val);
+
+	if ((!(val & AC_PINSENSE_PRESENCE)) || (!(val & AC_PINSENSE_ELDV))) {
+		dev_err(&hdac->hdac.dev, "Monitor presence invalid with val: %x\n", val);
+		return -ENODEV;
+	}
+
+	hdac_hdmi_set_power_state(hdac, dai_map, AC_PWRST_D0);
+
+	snd_hdac_codec_write(&hdac->hdac, dai_map->pin.nid, 0,
+			AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
+
+	snd_pcm_hw_constraint_step(substream->runtime, 0,
+				   SNDRV_PCM_HW_PARAM_CHANNELS, 2);
+
+	return 0;
+}
+
+static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
+	struct hdac_hdmi_priv *hdmi = hdac->private_data;
+	struct hdac_hdmi_dai_pin_map *dai_map;
+
+	dai_map = &hdmi->dai_map[dai->id];
+
+	hdac_hdmi_set_power_state(hdac, dai_map, AC_PWRST_D3);
+
+	snd_hdac_codec_write(&hdac->hdac, dai_map->pin.nid, 0,
+			AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
+}
+
 static int hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)
 {
 	int err;
@@ -286,6 +439,14 @@ static struct snd_soc_codec_driver hdmi_hda_codec = {
 	.idle_bias_off	= true,
 };
 
+static struct snd_soc_dai_ops hdmi_dai_ops = {
+	.startup = hdac_hdmi_pcm_open,
+	.shutdown = hdac_hdmi_pcm_close,
+	.hw_params = hdac_hdmi_set_hw_params,
+	.prepare = hdac_hdmi_playback_prepare,
+	.hw_free = hdac_hdmi_playback_cleanup,
+};
+
 static struct snd_soc_dai_driver hdmi_dais[] = {
 	{	.name = "intel-hdmi-hif1",
 		.playback = {
@@ -300,6 +461,7 @@ static struct snd_soc_dai_driver hdmi_dais[] = {
 				SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
 
 		},
+		.ops = &hdmi_dai_ops,
 	},
 };
 
-- 
2.4.3

[PATCH v3 5/6] ASoC: hdac_hdmi: Setup and start infoframe

[Vinod Koul]

From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>

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>
---
 sound/soc/codecs/hdac_hdmi.c | 60 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 40328757d568..1702691672d6 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 +90,59 @@ 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 +164,7 @@ 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 +177,11 @@ 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);
 }
-- 
2.4.3

[PATCH v3 6/6] ASoC: hdac_hdmi: Use i915 component framework for PM

[Vinod Koul]

From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>

Use the component framework to keep the display on till the
playback in progress.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 sound/soc/codecs/hdac_hdmi.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 1702691672d6..d76fa5b482d2 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -25,6 +25,7 @@
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/hdaudio_ext.h>
+#include <sound/hda_i915.h>
 #include "../../hda/local.h"
 
 #define AMP_OUT_MUTE		0xb080
@@ -563,14 +564,26 @@ static int hdac_hdmi_runtime_suspend(struct device *dev)
 {
 	struct hdac_ext_device *edev = to_hda_ext_device(dev);
 	struct hdac_device *hdac = &edev->hdac;
+	struct hdac_bus *bus = hdac->bus;
+	int err;
 
 	dev_dbg(dev, "Enter: %s\n", __func__);
 
+	/* controller may not have been initialized for the first time */
+	if (!bus)
+		return 0;
+
 	/* Power down afg */
 	if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D3))
 		snd_hdac_codec_write(hdac, hdac->afg, 0,
 			AC_VERB_SET_POWER_STATE, AC_PWRST_D3);
 
+	err = snd_hdac_display_power(bus, false);
+	if (err < 0) {
+		dev_err(bus->dev, "Cannot turn on display power on i915\n");
+		return err;
+	}
+
 	return 0;
 }
 
@@ -578,9 +591,21 @@ static int hdac_hdmi_runtime_resume(struct device *dev)
 {
 	struct hdac_ext_device *edev = to_hda_ext_device(dev);
 	struct hdac_device *hdac = &edev->hdac;
+	struct hdac_bus *bus = hdac->bus;
+	int err;
 
 	dev_dbg(dev, "Enter: %s\n", __func__);
 
+	/* controller may not have been initialized for the first time */
+	if (!bus)
+		return 0;
+
+	err = snd_hdac_display_power(bus, true);
+	if (err < 0) {
+		dev_err(bus->dev, "Cannot turn on display power on i915\n");
+		return err;
+	}
+
 	/* Power up afg */
 	if (!snd_hdac_check_power_state(hdac, hdac->afg, AC_PWRST_D0))
 		snd_hdac_codec_write(hdac, hdac->afg, 0,
-- 
2.4.3

Re: [PATCH v3 1/6] ALSA: hdac: structure definition for ext_dma_params

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 479 bytes --]

On Tue, Oct 27, 2015 at 04:42:12PM +0900, Vinod Koul wrote:
> From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>
> 
> This extends the structure definition of ext_device and adds
> definition for dma_params which will be used when hdmi codec.
> 
> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
> ---
>  include/sound/hdaudio_ext.h | 6 ++++++
>  1 file changed, 6 insertions(+)

Takashi?

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Re: [PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 949 bytes --]

On Tue, Oct 27, 2015 at 04:42:13PM +0900, Vinod Koul wrote:

> +	if (err < 0)
> +		dev_err(&hdac->dev, "Failed to query pcm params for nid: %d\n", cvt->nid);

That looks like the NID is being printed as an error code.

> +	/*
> +	 * Currently on board only 1 pin and 1 converter enabled for
> +	 * simplification, more will be added eventually
> +	 * So using fixed map for dai_id:pin:cvt
> +	 */
> +	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
> +			hdmi->cvt_nid[0], 0);

I'm not entirely sure I understand what this is all doing.  It looks
like it's trying to translate the HDA widget map into a DAPM map which
seems sensible but it appears it's making some simplifying assumptions
about the device it's dealing with?

> +static const struct hda_device_id hdmi_list[] = {
> +	HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),
> +	{}
> +};

Which is plausible since it's a driver for a specific HDA CODEC.

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Re: [PATCH v3 1/6] ALSA: hdac: structure definition for ext_dma_params

[Takashi Iwai]

On Sun, 01 Nov 2015 03:56:52 +0100,
Mark Brown wrote:
> 
> On Tue, Oct 27, 2015 at 04:42:12PM +0900, Vinod Koul wrote:
> > From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>
> > 
> > This extends the structure definition of ext_device and adds
> > definition for dma_params which will be used when hdmi codec.
> > 
> > Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
> > Signed-off-by: Vinod Koul <vinod.koul@intel.com>
> > ---
> >  include/sound/hdaudio_ext.h | 6 ++++++
> >  1 file changed, 6 insertions(+)
> 
> Takashi?

Acked-by: Takashi Iwai <tiwai@suse.de>


Takashi

Re: [PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Vinod Koul]

[-- Attachment #1.1: Type: text/plain, Size: 1193 bytes --]

On Sun, Nov 01, 2015 at 12:02:31PM +0900, Mark Brown wrote:
> On Tue, Oct 27, 2015 at 04:42:13PM +0900, Vinod Koul wrote:
> 
> > +	if (err < 0)
> > +		dev_err(&hdac->dev, "Failed to query pcm params for nid: %d\n", cvt->nid);
> 
> That looks like the NID is being printed as an error code.

No this prints the NID for which query fails, but agree we should print the
error code too, that might be very helpful :)

> > +	/*
> > +	 * Currently on board only 1 pin and 1 converter enabled for
> > +	 * simplification, more will be added eventually
> > +	 * So using fixed map for dai_id:pin:cvt
> > +	 */
> > +	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
> > +			hdmi->cvt_nid[0], 0);
> 
> I'm not entirely sure I understand what this is all doing.  It looks
> like it's trying to translate the HDA widget map into a DAPM map which
> seems sensible but it appears it's making some simplifying assumptions
> about the device it's dealing with?

The device is actually quite simple and yes we simplified even further by
ignoring multiple pins for now. We will keep adding more features and adding
stuff to map as we go along..

-- 
~Vinod

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Re: [PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 1611 bytes --]

On Mon, Nov 02, 2015 at 03:36:42PM +0530, Vinod Koul wrote:
> On Sun, Nov 01, 2015 at 12:02:31PM +0900, Mark Brown wrote:
> > On Tue, Oct 27, 2015 at 04:42:13PM +0900, Vinod Koul wrote:

> > > +	if (err < 0)
> > > +		dev_err(&hdac->dev, "Failed to query pcm params for nid: %d\n", cvt->nid);

> > That looks like the NID is being printed as an error code.

> No this prints the NID for which query fails, but agree we should print the
> error code too, that might be very helpful :)

No, it's also the format for the message - normally we do "message:
code".

> > > +	/*
> > > +	 * Currently on board only 1 pin and 1 converter enabled for
> > > +	 * simplification, more will be added eventually
> > > +	 * So using fixed map for dai_id:pin:cvt
> > > +	 */
> > > +	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
> > > +			hdmi->cvt_nid[0], 0);

> > I'm not entirely sure I understand what this is all doing.  It looks
> > like it's trying to translate the HDA widget map into a DAPM map which
> > seems sensible but it appears it's making some simplifying assumptions
> > about the device it's dealing with?

> The device is actually quite simple and yes we simplified even further by
> ignoring multiple pins for now. We will keep adding more features and adding
> stuff to map as we go along..

That's not giving me a clear picture of what the code is doing or how
we're working with the device - we've got some code parsing the HDA
graph, some code hard coding things and I don't really know why or how
anything fits together so I'm a bit nonplussed about what I'm reviewing
here.

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Re: [PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Vinod Koul]

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On Wed, Nov 04, 2015 at 02:48:45PM +0000, Mark Brown wrote:
> > > > +	/*
> > > > +	 * Currently on board only 1 pin and 1 converter enabled for
> > > > +	 * simplification, more will be added eventually
> > > > +	 * So using fixed map for dai_id:pin:cvt
> > > > +	 */
> > > > +	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
> > > > +			hdmi->cvt_nid[0], 0);
> 
> > > I'm not entirely sure I understand what this is all doing.  It looks
> > > like it's trying to translate the HDA widget map into a DAPM map which
> > > seems sensible but it appears it's making some simplifying assumptions
> > > about the device it's dealing with?
> 
> > The device is actually quite simple and yes we simplified even further by
> > ignoring multiple pins for now. We will keep adding more features and adding
> > stuff to map as we go along..
> 
> That's not giving me a clear picture of what the code is doing or how
> we're working with the device - we've got some code parsing the HDA
> graph, some code hard coding things and I don't really know why or how
> anything fits together so I'm a bit nonplussed about what I'm reviewing
> here.

Sorry for late reply, somehow seemed to miss this earlier..

Here is the complete picture let me know if things are not clear

This code has below structure (from the specs).

			Root Node (0)
			     |
			   AFG  (1)
			     |
	Converter (2) ----------------	Pin Widget (5)
			     |
	Converter (3) ----------------	Pin Widget (6)
			     |
	Converter (4) ----------------	Pin Widget (7)
			     |
			Vendor Widget (8)

Numbers in braces indicated NID values for these nodes

Currently we are using only one pin which is used on our ref board and seems
to be default config.
After the base driver is done we will add code to enumerate all the nodes.
Based on node capability we will parse and add widgets for all the queried
nodes. So for this case will be 3 nodes and 3 widgets created

Since coding for each widget would not make sense so we created a generic
function hdac_hdmi_init_dai_map() based on the node passed which we will use
later for all the queried pins

Thanks
-- 
~Vinod

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Re: [PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Takashi Iwai]

On Mon, 09 Nov 2015 05:39:20 +0100,
Vinod Koul wrote:
> 
> On Wed, Nov 04, 2015 at 02:48:45PM +0000, Mark Brown wrote:
> > > > > +	/*
> > > > > +	 * Currently on board only 1 pin and 1 converter enabled for
> > > > > +	 * simplification, more will be added eventually
> > > > > +	 * So using fixed map for dai_id:pin:cvt
> > > > > +	 */
> > > > > +	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
> > > > > +			hdmi->cvt_nid[0], 0);
> > 
> > > > I'm not entirely sure I understand what this is all doing.  It looks
> > > > like it's trying to translate the HDA widget map into a DAPM map which
> > > > seems sensible but it appears it's making some simplifying assumptions
> > > > about the device it's dealing with?
> > 
> > > The device is actually quite simple and yes we simplified even further by
> > > ignoring multiple pins for now. We will keep adding more features and adding
> > > stuff to map as we go along..
> > 
> > That's not giving me a clear picture of what the code is doing or how
> > we're working with the device - we've got some code parsing the HDA
> > graph, some code hard coding things and I don't really know why or how
> > anything fits together so I'm a bit nonplussed about what I'm reviewing
> > here.
> 
> Sorry for late reply, somehow seemed to miss this earlier..
> 
> Here is the complete picture let me know if things are not clear
> 
> This code has below structure (from the specs).
> 
> 			Root Node (0)
> 			     |
> 			   AFG  (1)
> 			     |
> 	Converter (2) ----------------	Pin Widget (5)
> 			     |
> 	Converter (3) ----------------	Pin Widget (6)
> 			     |
> 	Converter (4) ----------------	Pin Widget (7)
> 			     |
> 			Vendor Widget (8)
> 
> Numbers in braces indicated NID values for these nodes
> 
> Currently we are using only one pin which is used on our ref board and seems
> to be default config.
> After the base driver is done we will add code to enumerate all the nodes.
> Based on node capability we will parse and add widgets for all the queried
> nodes. So for this case will be 3 nodes and 3 widgets created
> 
> Since coding for each widget would not make sense so we created a generic
> function hdac_hdmi_init_dai_map() based on the node passed which we will use
> later for all the queried pins

Note that the mapping between converters and pins are arbitrary on
many HDMI/DP codecs.  Although it's implicitly implemented as 1:1 on a
few Intel codecs (in GPU), with the extension of MST, the routing will
be again dynamic, too.  Also, many codecs have amp on converter or pin
in addition.

Since it's targeted only for ASoC skylake and upward, it's fine to
start from the simplest assumption.  But you need to make clear how
generic your driver will support in feature, as the code complexity
will depend on it.


Takashi

Re: [PATCH v3 2/6] ASoC: hdac-hdmi: Add hdmi driver

[Vinod Koul]

On Mon, Nov 09, 2015 at 08:51:11AM +0100, Takashi Iwai wrote:
> On Mon, 09 Nov 2015 05:39:20 +0100,
> Vinod Koul wrote:
> > 
> > On Wed, Nov 04, 2015 at 02:48:45PM +0000, Mark Brown wrote:
> > > > > > +	/*
> > > > > > +	 * Currently on board only 1 pin and 1 converter enabled for
> > > > > > +	 * simplification, more will be added eventually
> > > > > > +	 * So using fixed map for dai_id:pin:cvt
> > > > > > +	 */
> > > > > > +	return hdac_hdmi_init_dai_map(edev, &hdmi->dai_map[0], hdmi->pin_nid[0],
> > > > > > +			hdmi->cvt_nid[0], 0);
> > > 
> > > > > I'm not entirely sure I understand what this is all doing.  It looks
> > > > > like it's trying to translate the HDA widget map into a DAPM map which
> > > > > seems sensible but it appears it's making some simplifying assumptions
> > > > > about the device it's dealing with?
> > > 
> > > > The device is actually quite simple and yes we simplified even further by
> > > > ignoring multiple pins for now. We will keep adding more features and adding
> > > > stuff to map as we go along..
> > > 
> > > That's not giving me a clear picture of what the code is doing or how
> > > we're working with the device - we've got some code parsing the HDA
> > > graph, some code hard coding things and I don't really know why or how
> > > anything fits together so I'm a bit nonplussed about what I'm reviewing
> > > here.
> > 
> > Sorry for late reply, somehow seemed to miss this earlier..
> > 
> > Here is the complete picture let me know if things are not clear
> > 
> > This code has below structure (from the specs).
> > 
> > 			Root Node (0)
> > 			     |
> > 			   AFG  (1)
> > 			     |
> > 	Converter (2) ----------------	Pin Widget (5)
> > 			     |
> > 	Converter (3) ----------------	Pin Widget (6)
> > 			     |
> > 	Converter (4) ----------------	Pin Widget (7)
> > 			     |
> > 			Vendor Widget (8)
> > 
> > Numbers in braces indicated NID values for these nodes
> > 
> > Currently we are using only one pin which is used on our ref board and seems
> > to be default config.
> > After the base driver is done we will add code to enumerate all the nodes.
> > Based on node capability we will parse and add widgets for all the queried
> > nodes. So for this case will be 3 nodes and 3 widgets created
> > 
> > Since coding for each widget would not make sense so we created a generic
> > function hdac_hdmi_init_dai_map() based on the node passed which we will use
> > later for all the queried pins
> 
> Note that the mapping between converters and pins are arbitrary on
> many HDMI/DP codecs.  Although it's implicitly implemented as 1:1 on a
> few Intel codecs (in GPU), with the extension of MST, the routing will
> be again dynamic, too.  Also, many codecs have amp on converter or pin
> in addition.

Yes that is why we didn't say converter pin pair although by looking at
diagram one can assume that and in many case it is true but we should not
rely on this in our code

> Since it's targeted only for ASoC skylake and upward, it's fine to
> start from the simplest assumption.  But you need to make clear how
> generic your driver will support in feature, as the code complexity
> will depend on it.

So right now we are going to use 1:1 mapping as simple design but the
thinking from us is that we should add DAPM widgets for converters and pins
and routing to pin should be decided by DAPM map.
The converter to pin configuration should be derived by the user settings.

-- 
~Vinod