--- /dev/null
+/*
+ * 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: %d\n",
+ cvt->nid, err);
+
+ 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;
+ }
+
+ 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;
+
+ 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);
+
+ 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;
+
+ if (!pin_nid || !cvt_nid)
+ return -EIO;
+
+ /*
+ * Currently on board only 1 pin and 1 converter is 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;
+
+ 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>");
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