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linux-next/sound/soc/codecs/hdac_hdmi.c
Mark Brown 0b9751c717
ASoC: Intel: Fix build 
One of the recently introduced commits hadn't been build tested, fix
that.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-02-15 17:14:16 +00:00

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/*
* 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 <linux/hdmi.h>
#include <drm/drm_edid.h>
#include <sound/pcm_params.h>
#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/hdaudio_ext.h>
#include <sound/hda_i915.h>
#include <sound/pcm_drm_eld.h>
#include <sound/hda_chmap.h>
#include "../../hda/local.h"
#include "hdac_hdmi.h"
#define NAME_SIZE 32
#define AMP_OUT_MUTE 0xb080
#define AMP_OUT_UNMUTE 0xb000
#define PIN_OUT (AC_PINCTL_OUT_EN)
#define HDA_MAX_CONNECTIONS 32
#define HDA_MAX_CVTS 3
#define HDA_MAX_PORTS 3
#define ELD_MAX_SIZE 256
#define ELD_FIXED_BYTES 20
#define ELD_VER_CEA_861D 2
#define ELD_VER_PARTIAL 31
#define ELD_MAX_MNL 16
struct hdac_hdmi_cvt_params {
unsigned int channels_min;
unsigned int channels_max;
u32 rates;
u64 formats;
unsigned int maxbps;
};
struct hdac_hdmi_cvt {
struct list_head head;
hda_nid_t nid;
const char *name;
struct hdac_hdmi_cvt_params params;
};
/* Currently only spk_alloc, more to be added */
struct hdac_hdmi_parsed_eld {
u8 spk_alloc;
};
struct hdac_hdmi_eld {
bool monitor_present;
bool eld_valid;
int eld_size;
char eld_buffer[ELD_MAX_SIZE];
struct hdac_hdmi_parsed_eld info;
};
struct hdac_hdmi_pin {
struct list_head head;
hda_nid_t nid;
bool mst_capable;
struct hdac_hdmi_port *ports;
int num_ports;
struct hdac_ext_device *edev;
};
struct hdac_hdmi_port {
struct list_head head;
int id;
struct hdac_hdmi_pin *pin;
int num_mux_nids;
hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
struct hdac_hdmi_eld eld;
const char *jack_pin;
struct snd_soc_dapm_context *dapm;
const char *output_pin;
};
struct hdac_hdmi_pcm {
struct list_head head;
int pcm_id;
struct list_head port_list;
struct hdac_hdmi_cvt *cvt;
struct snd_soc_jack *jack;
int stream_tag;
int channels;
int format;
bool chmap_set;
unsigned char chmap[8]; /* ALSA API channel-map */
struct mutex lock;
int jack_event;
};
struct hdac_hdmi_dai_port_map {
int dai_id;
struct hdac_hdmi_port *port;
struct hdac_hdmi_cvt *cvt;
};
struct hdac_hdmi_drv_data {
unsigned int vendor_nid;
};
struct hdac_hdmi_priv {
struct hdac_hdmi_dai_port_map dai_map[HDA_MAX_CVTS];
struct list_head pin_list;
struct list_head cvt_list;
struct list_head pcm_list;
int num_pin;
int num_cvt;
int num_ports;
struct mutex pin_mutex;
struct hdac_chmap chmap;
struct hdac_hdmi_drv_data *drv_data;
struct snd_soc_dai_driver *dai_drv;
};
#define hdev_to_hdmi_priv(_hdev) ((to_ehdac_device(_hdev))->private_data)
static struct hdac_hdmi_pcm *
hdac_hdmi_get_pcm_from_cvt(struct hdac_hdmi_priv *hdmi,
struct hdac_hdmi_cvt *cvt)
{
struct hdac_hdmi_pcm *pcm = NULL;
list_for_each_entry(pcm, &hdmi->pcm_list, head) {
if (pcm->cvt == cvt)
break;
}
return pcm;
}
static void hdac_hdmi_jack_report(struct hdac_hdmi_pcm *pcm,
struct hdac_hdmi_port *port, bool is_connect)
{
struct hdac_ext_device *edev = port->pin->edev;
if (is_connect)
snd_soc_dapm_enable_pin(port->dapm, port->jack_pin);
else
snd_soc_dapm_disable_pin(port->dapm, port->jack_pin);
if (is_connect) {
/*
* Report Jack connect event when a device is connected
* for the first time where same PCM is attached to multiple
* ports.
*/
if (pcm->jack_event == 0) {
dev_dbg(&edev->hdev.dev,
"jack report for pcm=%d\n",
pcm->pcm_id);
snd_soc_jack_report(pcm->jack, SND_JACK_AVOUT,
SND_JACK_AVOUT);
}
pcm->jack_event++;
} else {
/*
* Report Jack disconnect event when a device is disconnected
* is the only last connected device when same PCM is attached
* to multiple ports.
*/
if (pcm->jack_event == 1)
snd_soc_jack_report(pcm->jack, 0, SND_JACK_AVOUT);
if (pcm->jack_event > 0)
pcm->jack_event--;
}
snd_soc_dapm_sync(port->dapm);
}
/* MST supported verbs */
/*
* Get the no devices that can be connected to a port on the Pin widget.
*/
static int hdac_hdmi_get_port_len(struct hdac_ext_device *edev, hda_nid_t nid)
{
unsigned int caps;
unsigned int type, param;
caps = get_wcaps(&edev->hdev, nid);
type = get_wcaps_type(caps);
if (!(caps & AC_WCAP_DIGITAL) || (type != AC_WID_PIN))
return 0;
param = snd_hdac_read_parm_uncached(&edev->hdev, nid,
AC_PAR_DEVLIST_LEN);
if (param == -1)
return param;
return param & AC_DEV_LIST_LEN_MASK;
}
/*
* Get the port entry select on the pin. Return the port entry
* id selected on the pin. Return 0 means the first port entry
* is selected or MST is not supported.
*/
static int hdac_hdmi_port_select_get(struct hdac_ext_device *edev,
struct hdac_hdmi_port *port)
{
return snd_hdac_codec_read(&edev->hdev, port->pin->nid,
0, AC_VERB_GET_DEVICE_SEL, 0);
}
/*
* Sets the selected port entry for the configuring Pin widget verb.
* returns error if port set is not equal to port get otherwise success
*/
static int hdac_hdmi_port_select_set(struct hdac_ext_device *edev,
struct hdac_hdmi_port *port)
{
int num_ports;
if (!port->pin->mst_capable)
return 0;
/* AC_PAR_DEVLIST_LEN is 0 based. */
num_ports = hdac_hdmi_get_port_len(edev, port->pin->nid);
if (num_ports < 0)
return -EIO;
/*
* Device List Length is a 0 based integer value indicating the
* number of sink device that a MST Pin Widget can support.
*/
if (num_ports + 1 < port->id)
return 0;
snd_hdac_codec_write(&edev->hdev, port->pin->nid, 0,
AC_VERB_SET_DEVICE_SEL, port->id);
if (port->id != hdac_hdmi_port_select_get(edev, port))
return -EIO;
dev_dbg(&edev->hdev.dev, "Selected the port=%d\n", port->id);
return 0;
}
static struct hdac_hdmi_pcm *get_hdmi_pcm_from_id(struct hdac_hdmi_priv *hdmi,
int pcm_idx)
{
struct hdac_hdmi_pcm *pcm;
list_for_each_entry(pcm, &hdmi->pcm_list, head) {
if (pcm->pcm_id == pcm_idx)
return pcm;
}
return NULL;
}
static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)
{
struct hdac_device *hdev = dev_to_hdac_dev(dev);
return to_ehdac_device(hdev);
}
static unsigned int sad_format(const u8 *sad)
{
return ((sad[0] >> 0x3) & 0x1f);
}
static unsigned int sad_sample_bits_lpcm(const u8 *sad)
{
return (sad[2] & 7);
}
static int hdac_hdmi_eld_limit_formats(struct snd_pcm_runtime *runtime,
void *eld)
{
u64 formats = SNDRV_PCM_FMTBIT_S16;
int i;
const u8 *sad, *eld_buf = eld;
sad = drm_eld_sad(eld_buf);
if (!sad)
goto format_constraint;
for (i = drm_eld_sad_count(eld_buf); i > 0; i--, sad += 3) {
if (sad_format(sad) == 1) { /* AUDIO_CODING_TYPE_LPCM */
/*
* the controller support 20 and 24 bits in 32 bit
* container so we set S32
*/
if (sad_sample_bits_lpcm(sad) & 0x6)
formats |= SNDRV_PCM_FMTBIT_S32;
}
}
format_constraint:
return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
formats);
}
static void
hdac_hdmi_set_dip_index(struct hdac_ext_device *edev, hda_nid_t pin_nid,
int packet_index, int byte_index)
{
int val;
val = (packet_index << 5) | (byte_index & 0x1f);
snd_hdac_codec_write(&edev->hdev, pin_nid, 0,
AC_VERB_SET_HDMI_DIP_INDEX, val);
}
struct dp_audio_infoframe {
u8 type; /* 0x84 */
u8 len; /* 0x1b */
u8 ver; /* 0x11 << 2 */
u8 CC02_CT47; /* match with HDMI infoframe from this on */
u8 SS01_SF24;
u8 CXT04;
u8 CA;
u8 LFEPBL01_LSV36_DM_INH7;
};
static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *edev,
struct hdac_hdmi_pcm *pcm, struct hdac_hdmi_port *port)
{
uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
struct hdmi_audio_infoframe frame;
struct hdac_hdmi_pin *pin = port->pin;
struct dp_audio_infoframe dp_ai;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_cvt *cvt = pcm->cvt;
u8 *dip;
int ret;
int i;
const u8 *eld_buf;
u8 conn_type;
int channels, ca;
ca = snd_hdac_channel_allocation(&edev->hdev, port->eld.info.spk_alloc,
pcm->channels, pcm->chmap_set, true, pcm->chmap);
channels = snd_hdac_get_active_channels(ca);
hdmi->chmap.ops.set_channel_count(&edev->hdev, cvt->nid, channels);
snd_hdac_setup_channel_mapping(&hdmi->chmap, pin->nid, false, ca,
pcm->channels, pcm->chmap, pcm->chmap_set);
eld_buf = port->eld.eld_buffer;
conn_type = drm_eld_get_conn_type(eld_buf);
switch (conn_type) {
case DRM_ELD_CONN_TYPE_HDMI:
hdmi_audio_infoframe_init(&frame);
frame.channels = channels;
frame.channel_allocation = ca;
ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
if (ret < 0)
return ret;
break;
case DRM_ELD_CONN_TYPE_DP:
memset(&dp_ai, 0, sizeof(dp_ai));
dp_ai.type = 0x84;
dp_ai.len = 0x1b;
dp_ai.ver = 0x11 << 2;
dp_ai.CC02_CT47 = channels - 1;
dp_ai.CA = ca;
dip = (u8 *)&dp_ai;
break;
default:
dev_err(&edev->hdev.dev, "Invalid connection type: %d\n",
conn_type);
return -EIO;
}
/* stop infoframe transmission */
hdac_hdmi_set_dip_index(edev, pin->nid, 0x0, 0x0);
snd_hdac_codec_write(&edev->hdev, pin->nid, 0,
AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_DISABLE);
/* Fill infoframe. Index auto-incremented */
hdac_hdmi_set_dip_index(edev, pin->nid, 0x0, 0x0);
if (conn_type == DRM_ELD_CONN_TYPE_HDMI) {
for (i = 0; i < sizeof(buffer); i++)
snd_hdac_codec_write(&edev->hdev, pin->nid, 0,
AC_VERB_SET_HDMI_DIP_DATA, buffer[i]);
} else {
for (i = 0; i < sizeof(dp_ai); i++)
snd_hdac_codec_write(&edev->hdev, pin->nid, 0,
AC_VERB_SET_HDMI_DIP_DATA, dip[i]);
}
/* Start infoframe */
hdac_hdmi_set_dip_index(edev, pin->nid, 0x0, 0x0);
snd_hdac_codec_write(&edev->hdev, pin->nid, 0,
AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_BEST);
return 0;
}
static int hdac_hdmi_set_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask,
int slots, int slot_width)
{
struct hdac_ext_device *edev = snd_soc_dai_get_drvdata(dai);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_dai_port_map *dai_map;
struct hdac_hdmi_pcm *pcm;
dev_dbg(&edev->hdev.dev, "%s: strm_tag: %d\n", __func__, tx_mask);
dai_map = &hdmi->dai_map[dai->id];
pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);
if (pcm)
pcm->stream_tag = (tx_mask << 4);
return 0;
}
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 *edev = snd_soc_dai_get_drvdata(dai);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_dai_port_map *dai_map;
struct hdac_hdmi_port *port;
struct hdac_hdmi_pcm *pcm;
int format;
dai_map = &hdmi->dai_map[dai->id];
port = dai_map->port;
if (!port)
return -ENODEV;
if ((!port->eld.monitor_present) || (!port->eld.eld_valid)) {
dev_err(&edev->hdev.dev,
"device is not configured for this pin:port%d:%d\n",
port->pin->nid, port->id);
return -ENODEV;
}
format = snd_hdac_calc_stream_format(params_rate(hparams),
params_channels(hparams), params_format(hparams),
dai->driver->playback.sig_bits, 0);
pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);
if (!pcm)
return -EIO;
pcm->format = format;
pcm->channels = params_channels(hparams);
return 0;
}
static int hdac_hdmi_query_port_connlist(struct hdac_ext_device *edev,
struct hdac_hdmi_pin *pin,
struct hdac_hdmi_port *port)
{
if (!(get_wcaps(&edev->hdev, pin->nid) & AC_WCAP_CONN_LIST)) {
dev_warn(&edev->hdev.dev,
"HDMI: pin %d wcaps %#x does not support connection list\n",
pin->nid, get_wcaps(&edev->hdev, pin->nid));
return -EINVAL;
}
if (hdac_hdmi_port_select_set(edev, port) < 0)
return -EIO;
port->num_mux_nids = snd_hdac_get_connections(&edev->hdev, pin->nid,
port->mux_nids, HDA_MAX_CONNECTIONS);
if (port->num_mux_nids == 0)
dev_warn(&edev->hdev.dev,
"No connections found for pin:port %d:%d\n",
pin->nid, port->id);
dev_dbg(&edev->hdev.dev, "num_mux_nids %d for pin:port %d:%d\n",
port->num_mux_nids, pin->nid, port->id);
return port->num_mux_nids;
}
/*
* Query pcm list and return port to which stream is routed.
*
* Also query connection list of the pin, to validate the cvt to port map.
*
* Same stream rendering to multiple ports simultaneously can be done
* possibly, but not supported for now in driver. So return the first port
* connected.
*/
static struct hdac_hdmi_port *hdac_hdmi_get_port_from_cvt(
struct hdac_ext_device *edev,
struct hdac_hdmi_priv *hdmi,
struct hdac_hdmi_cvt *cvt)
{
struct hdac_hdmi_pcm *pcm;
struct hdac_hdmi_port *port = NULL;
int ret, i;
list_for_each_entry(pcm, &hdmi->pcm_list, head) {
if (pcm->cvt == cvt) {
if (list_empty(&pcm->port_list))
continue;
list_for_each_entry(port, &pcm->port_list, head) {
mutex_lock(&pcm->lock);
ret = hdac_hdmi_query_port_connlist(edev,
port->pin, port);
mutex_unlock(&pcm->lock);
if (ret < 0)
continue;
for (i = 0; i < port->num_mux_nids; i++) {
if (port->mux_nids[i] == cvt->nid &&
port->eld.monitor_present &&
port->eld.eld_valid)
return port;
}
}
}
}
return NULL;
}
/*
* This tries to get a valid pin and set the HW constraints based on the
* ELD. Even if a valid pin is not found return success so that device open
* doesn't fail.
*/
static int hdac_hdmi_pcm_open(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdac_ext_device *edev = snd_soc_dai_get_drvdata(dai);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_dai_port_map *dai_map;
struct hdac_hdmi_cvt *cvt;
struct hdac_hdmi_port *port;
int ret;
dai_map = &hdmi->dai_map[dai->id];
cvt = dai_map->cvt;
port = hdac_hdmi_get_port_from_cvt(edev, hdmi, cvt);
/*
* To make PA and other userland happy.
* userland scans devices so returning error does not help.
*/
if (!port)
return 0;
if ((!port->eld.monitor_present) ||
(!port->eld.eld_valid)) {
dev_warn(&edev->hdev.dev,
"Failed: present?:%d ELD valid?:%d pin:port: %d:%d\n",
port->eld.monitor_present, port->eld.eld_valid,
port->pin->nid, port->id);
return 0;
}
dai_map->port = port;
ret = hdac_hdmi_eld_limit_formats(substream->runtime,
port->eld.eld_buffer);
if (ret < 0)
return ret;
return snd_pcm_hw_constraint_eld(substream->runtime,
port->eld.eld_buffer);
}
static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdac_ext_device *edev = snd_soc_dai_get_drvdata(dai);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_dai_port_map *dai_map;
struct hdac_hdmi_pcm *pcm;
dai_map = &hdmi->dai_map[dai->id];
pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);
if (pcm) {
mutex_lock(&pcm->lock);
pcm->chmap_set = false;
memset(pcm->chmap, 0, sizeof(pcm->chmap));
pcm->channels = 0;
mutex_unlock(&pcm->lock);
}
if (dai_map->port)
dai_map->port = NULL;
}
static int
hdac_hdmi_query_cvt_params(struct hdac_device *hdev, struct hdac_hdmi_cvt *cvt)
{
unsigned int chans;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
int err;
chans = get_wcaps(hdev, cvt->nid);
chans = get_wcaps_channels(chans);
cvt->params.channels_min = 2;
cvt->params.channels_max = chans;
if (chans > hdmi->chmap.channels_max)
hdmi->chmap.channels_max = chans;
err = snd_hdac_query_supported_pcm(hdev, cvt->nid,
&cvt->params.rates,
&cvt->params.formats,
&cvt->params.maxbps);
if (err < 0)
dev_err(&hdev->dev,
"Failed to query pcm params for nid %d: %d\n",
cvt->nid, err);
return err;
}
static int hdac_hdmi_fill_widget_info(struct device *dev,
struct snd_soc_dapm_widget *w, enum snd_soc_dapm_type id,
void *priv, const char *wname, const char *stream,
struct snd_kcontrol_new *wc, int numkc,
int (*event)(struct snd_soc_dapm_widget *,
struct snd_kcontrol *, int), unsigned short event_flags)
{
w->id = id;
w->name = devm_kstrdup(dev, wname, GFP_KERNEL);
if (!w->name)
return -ENOMEM;
w->sname = stream;
w->reg = SND_SOC_NOPM;
w->shift = 0;
w->kcontrol_news = wc;
w->num_kcontrols = numkc;
w->priv = priv;
w->event = event;
w->event_flags = event_flags;
return 0;
}
static void hdac_hdmi_fill_route(struct snd_soc_dapm_route *route,
const char *sink, const char *control, const char *src,
int (*handler)(struct snd_soc_dapm_widget *src,
struct snd_soc_dapm_widget *sink))
{
route->sink = sink;
route->source = src;
route->control = control;
route->connected = handler;
}
static struct hdac_hdmi_pcm *hdac_hdmi_get_pcm(struct hdac_ext_device *edev,
struct hdac_hdmi_port *port)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pcm *pcm = NULL;
struct hdac_hdmi_port *p;
list_for_each_entry(pcm, &hdmi->pcm_list, head) {
if (list_empty(&pcm->port_list))
continue;
list_for_each_entry(p, &pcm->port_list, head) {
if (p->id == port->id && port->pin == p->pin)
return pcm;
}
}
return NULL;
}
static void hdac_hdmi_set_power_state(struct hdac_ext_device *edev,
hda_nid_t nid, unsigned int pwr_state)
{
int count;
unsigned int state;
if (get_wcaps(&edev->hdev, nid) & AC_WCAP_POWER) {
if (!snd_hdac_check_power_state(&edev->hdev, nid, pwr_state)) {
for (count = 0; count < 10; count++) {
snd_hdac_codec_read(&edev->hdev, nid, 0,
AC_VERB_SET_POWER_STATE,
pwr_state);
state = snd_hdac_sync_power_state(&edev->hdev,
nid, pwr_state);
if (!(state & AC_PWRST_ERROR))
break;
}
}
}
}
static void hdac_hdmi_set_amp(struct hdac_ext_device *edev,
hda_nid_t nid, int val)
{
if (get_wcaps(&edev->hdev, nid) & AC_WCAP_OUT_AMP)
snd_hdac_codec_write(&edev->hdev, nid, 0,
AC_VERB_SET_AMP_GAIN_MUTE, val);
}
static int hdac_hdmi_pin_output_widget_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kc, int event)
{
struct hdac_hdmi_port *port = w->priv;
struct hdac_ext_device *edev = to_hda_ext_device(w->dapm->dev);
struct hdac_hdmi_pcm *pcm;
dev_dbg(&edev->hdev.dev, "%s: widget: %s event: %x\n",
__func__, w->name, event);
pcm = hdac_hdmi_get_pcm(edev, port);
if (!pcm)
return -EIO;
/* set the device if pin is mst_capable */
if (hdac_hdmi_port_select_set(edev, port) < 0)
return -EIO;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
hdac_hdmi_set_power_state(edev, port->pin->nid, AC_PWRST_D0);
/* Enable out path for this pin widget */
snd_hdac_codec_write(&edev->hdev, port->pin->nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
hdac_hdmi_set_amp(edev, port->pin->nid, AMP_OUT_UNMUTE);
return hdac_hdmi_setup_audio_infoframe(edev, pcm, port);
case SND_SOC_DAPM_POST_PMD:
hdac_hdmi_set_amp(edev, port->pin->nid, AMP_OUT_MUTE);
/* Disable out path for this pin widget */
snd_hdac_codec_write(&edev->hdev, port->pin->nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
hdac_hdmi_set_power_state(edev, port->pin->nid, AC_PWRST_D3);
break;
}
return 0;
}
static int hdac_hdmi_cvt_output_widget_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kc, int event)
{
struct hdac_hdmi_cvt *cvt = w->priv;
struct hdac_ext_device *edev = to_hda_ext_device(w->dapm->dev);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pcm *pcm;
dev_dbg(&edev->hdev.dev, "%s: widget: %s event: %x\n",
__func__, w->name, event);
pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, cvt);
if (!pcm)
return -EIO;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
hdac_hdmi_set_power_state(edev, cvt->nid, AC_PWRST_D0);
/* Enable transmission */
snd_hdac_codec_write(&edev->hdev, cvt->nid, 0,
AC_VERB_SET_DIGI_CONVERT_1, 1);
/* Category Code (CC) to zero */
snd_hdac_codec_write(&edev->hdev, cvt->nid, 0,
AC_VERB_SET_DIGI_CONVERT_2, 0);
snd_hdac_codec_write(&edev->hdev, cvt->nid, 0,
AC_VERB_SET_CHANNEL_STREAMID, pcm->stream_tag);
snd_hdac_codec_write(&edev->hdev, cvt->nid, 0,
AC_VERB_SET_STREAM_FORMAT, pcm->format);
break;
case SND_SOC_DAPM_POST_PMD:
snd_hdac_codec_write(&edev->hdev, cvt->nid, 0,
AC_VERB_SET_CHANNEL_STREAMID, 0);
snd_hdac_codec_write(&edev->hdev, cvt->nid, 0,
AC_VERB_SET_STREAM_FORMAT, 0);
hdac_hdmi_set_power_state(edev, cvt->nid, AC_PWRST_D3);
break;
}
return 0;
}
static int hdac_hdmi_pin_mux_widget_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kc, int event)
{
struct hdac_hdmi_port *port = w->priv;
struct hdac_ext_device *edev = to_hda_ext_device(w->dapm->dev);
int mux_idx;
dev_dbg(&edev->hdev.dev, "%s: widget: %s event: %x\n",
__func__, w->name, event);
if (!kc)
kc = w->kcontrols[0];
mux_idx = dapm_kcontrol_get_value(kc);
/* set the device if pin is mst_capable */
if (hdac_hdmi_port_select_set(edev, port) < 0)
return -EIO;
if (mux_idx > 0) {
snd_hdac_codec_write(&edev->hdev, port->pin->nid, 0,
AC_VERB_SET_CONNECT_SEL, (mux_idx - 1));
}
return 0;
}
/*
* Based on user selection, map the PINs with the PCMs.
*/
static int hdac_hdmi_set_pin_port_mux(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int ret;
struct hdac_hdmi_port *p, *p_next;
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
struct snd_soc_dapm_widget *w = snd_soc_dapm_kcontrol_widget(kcontrol);
struct snd_soc_dapm_context *dapm = w->dapm;
struct hdac_hdmi_port *port = w->priv;
struct hdac_ext_device *edev = to_hda_ext_device(dapm->dev);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pcm *pcm = NULL;
const char *cvt_name = e->texts[ucontrol->value.enumerated.item[0]];
ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);
if (ret < 0)
return ret;
if (port == NULL)
return -EINVAL;
mutex_lock(&hdmi->pin_mutex);
list_for_each_entry(pcm, &hdmi->pcm_list, head) {
if (list_empty(&pcm->port_list))
continue;
list_for_each_entry_safe(p, p_next, &pcm->port_list, head) {
if (p == port && p->id == port->id &&
p->pin == port->pin) {
hdac_hdmi_jack_report(pcm, port, false);
list_del(&p->head);
}
}
}
/*
* Jack status is not reported during device probe as the
* PCMs are not registered by then. So report it here.
*/
list_for_each_entry(pcm, &hdmi->pcm_list, head) {
if (!strcmp(cvt_name, pcm->cvt->name)) {
list_add_tail(&port->head, &pcm->port_list);
if (port->eld.monitor_present && port->eld.eld_valid) {
hdac_hdmi_jack_report(pcm, port, true);
mutex_unlock(&hdmi->pin_mutex);
return ret;
}
}
}
mutex_unlock(&hdmi->pin_mutex);
return ret;
}
/*
* Ideally the Mux inputs should be based on the num_muxs enumerated, but
* the display driver seem to be programming the connection list for the pin
* widget runtime.
*
* So programming all the possible inputs for the mux, the user has to take
* care of selecting the right one and leaving all other inputs selected to
* "NONE"
*/
static int hdac_hdmi_create_pin_port_muxs(struct hdac_ext_device *edev,
struct hdac_hdmi_port *port,
struct snd_soc_dapm_widget *widget,
const char *widget_name)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pin *pin = port->pin;
struct snd_kcontrol_new *kc;
struct hdac_hdmi_cvt *cvt;
struct soc_enum *se;
char kc_name[NAME_SIZE];
char mux_items[NAME_SIZE];
/* To hold inputs to the Pin mux */
char *items[HDA_MAX_CONNECTIONS];
int i = 0;
int num_items = hdmi->num_cvt + 1;
kc = devm_kzalloc(&edev->hdev.dev, sizeof(*kc), GFP_KERNEL);
if (!kc)
return -ENOMEM;
se = devm_kzalloc(&edev->hdev.dev, sizeof(*se), GFP_KERNEL);
if (!se)
return -ENOMEM;
snprintf(kc_name, NAME_SIZE, "Pin %d port %d Input",
pin->nid, port->id);
kc->name = devm_kstrdup(&edev->hdev.dev, kc_name, GFP_KERNEL);
if (!kc->name)
return -ENOMEM;
kc->private_value = (long)se;
kc->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
kc->access = 0;
kc->info = snd_soc_info_enum_double;
kc->put = hdac_hdmi_set_pin_port_mux;
kc->get = snd_soc_dapm_get_enum_double;
se->reg = SND_SOC_NOPM;
/* enum texts: ["NONE", "cvt #", "cvt #", ...] */
se->items = num_items;
se->mask = roundup_pow_of_two(se->items) - 1;
sprintf(mux_items, "NONE");
items[i] = devm_kstrdup(&edev->hdev.dev, mux_items, GFP_KERNEL);
if (!items[i])
return -ENOMEM;
list_for_each_entry(cvt, &hdmi->cvt_list, head) {
i++;
sprintf(mux_items, "cvt %d", cvt->nid);
items[i] = devm_kstrdup(&edev->hdev.dev, mux_items, GFP_KERNEL);
if (!items[i])
return -ENOMEM;
}
se->texts = devm_kmemdup(&edev->hdev.dev, items,
(num_items * sizeof(char *)), GFP_KERNEL);
if (!se->texts)
return -ENOMEM;
return hdac_hdmi_fill_widget_info(&edev->hdev.dev, widget,
snd_soc_dapm_mux, port, widget_name, NULL, kc, 1,
hdac_hdmi_pin_mux_widget_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_REG);
}
/* Add cvt <- input <- mux route map */
static void hdac_hdmi_add_pinmux_cvt_route(struct hdac_ext_device *edev,
struct snd_soc_dapm_widget *widgets,
struct snd_soc_dapm_route *route, int rindex)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
const struct snd_kcontrol_new *kc;
struct soc_enum *se;
int mux_index = hdmi->num_cvt + hdmi->num_ports;
int i, j;
for (i = 0; i < hdmi->num_ports; i++) {
kc = widgets[mux_index].kcontrol_news;
se = (struct soc_enum *)kc->private_value;
for (j = 0; j < hdmi->num_cvt; j++) {
hdac_hdmi_fill_route(&route[rindex],
widgets[mux_index].name,
se->texts[j + 1],
widgets[j].name, NULL);
rindex++;
}
mux_index++;
}
}
/*
* Widgets are added in the below sequence
* Converter widgets for num converters enumerated
* Pin-port widgets for num ports for Pins enumerated
* Pin-port mux widgets to represent connenction list of pin widget
*
* For each port, one Mux and One output widget is added
* Total widgets elements = num_cvt + (num_ports * 2);
*
* Routes are added as below:
* pin-port mux -> pin (based on num_ports)
* cvt -> "Input sel control" -> pin-port_mux
*
* Total route elements:
* num_ports + (pin_muxes * num_cvt)
*/
static int create_fill_widget_route_map(struct snd_soc_dapm_context *dapm)
{
struct snd_soc_dapm_widget *widgets;
struct snd_soc_dapm_route *route;
struct hdac_ext_device *edev = to_hda_ext_device(dapm->dev);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct snd_soc_dai_driver *dai_drv = hdmi->dai_drv;
char widget_name[NAME_SIZE];
struct hdac_hdmi_cvt *cvt;
struct hdac_hdmi_pin *pin;
int ret, i = 0, num_routes = 0, j;
if (list_empty(&hdmi->cvt_list) || list_empty(&hdmi->pin_list))
return -EINVAL;
widgets = devm_kzalloc(dapm->dev, (sizeof(*widgets) *
((2 * hdmi->num_ports) + hdmi->num_cvt)),
GFP_KERNEL);
if (!widgets)
return -ENOMEM;
/* DAPM widgets to represent each converter widget */
list_for_each_entry(cvt, &hdmi->cvt_list, head) {
sprintf(widget_name, "Converter %d", cvt->nid);
ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
snd_soc_dapm_aif_in, cvt,
widget_name, dai_drv[i].playback.stream_name, NULL, 0,
hdac_hdmi_cvt_output_widget_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD);
if (ret < 0)
return ret;
i++;
}
list_for_each_entry(pin, &hdmi->pin_list, head) {
for (j = 0; j < pin->num_ports; j++) {
sprintf(widget_name, "hif%d-%d Output",
pin->nid, pin->ports[j].id);
ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
snd_soc_dapm_output, &pin->ports[j],
widget_name, NULL, NULL, 0,
hdac_hdmi_pin_output_widget_event,
SND_SOC_DAPM_PRE_PMU |
SND_SOC_DAPM_POST_PMD);
if (ret < 0)
return ret;
pin->ports[j].output_pin = widgets[i].name;
i++;
}
}
/* DAPM widgets to represent the connection list to pin widget */
list_for_each_entry(pin, &hdmi->pin_list, head) {
for (j = 0; j < pin->num_ports; j++) {
sprintf(widget_name, "Pin%d-Port%d Mux",
pin->nid, pin->ports[j].id);
ret = hdac_hdmi_create_pin_port_muxs(edev,
&pin->ports[j], &widgets[i],
widget_name);
if (ret < 0)
return ret;
i++;
/* For cvt to pin_mux mapping */
num_routes += hdmi->num_cvt;
/* For pin_mux to pin mapping */
num_routes++;
}
}
route = devm_kzalloc(dapm->dev, (sizeof(*route) * num_routes),
GFP_KERNEL);
if (!route)
return -ENOMEM;
i = 0;
/* Add pin <- NULL <- mux route map */
list_for_each_entry(pin, &hdmi->pin_list, head) {
for (j = 0; j < pin->num_ports; j++) {
int sink_index = i + hdmi->num_cvt;
int src_index = sink_index + pin->num_ports *
hdmi->num_pin;
hdac_hdmi_fill_route(&route[i],
widgets[sink_index].name, NULL,
widgets[src_index].name, NULL);
i++;
}
}
hdac_hdmi_add_pinmux_cvt_route(edev, widgets, route, i);
snd_soc_dapm_new_controls(dapm, widgets,
((2 * hdmi->num_ports) + hdmi->num_cvt));
snd_soc_dapm_add_routes(dapm, route, num_routes);
snd_soc_dapm_new_widgets(dapm->card);
return 0;
}
static int hdac_hdmi_init_dai_map(struct hdac_ext_device *edev)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_dai_port_map *dai_map;
struct hdac_hdmi_cvt *cvt;
int dai_id = 0;
if (list_empty(&hdmi->cvt_list))
return -EINVAL;
list_for_each_entry(cvt, &hdmi->cvt_list, head) {
dai_map = &hdmi->dai_map[dai_id];
dai_map->dai_id = dai_id;
dai_map->cvt = cvt;
dai_id++;
if (dai_id == HDA_MAX_CVTS) {
dev_warn(&edev->hdev.dev,
"Max dais supported: %d\n", dai_id);
break;
}
}
return 0;
}
static int hdac_hdmi_add_cvt(struct hdac_ext_device *edev, hda_nid_t nid)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_cvt *cvt;
char name[NAME_SIZE];
cvt = kzalloc(sizeof(*cvt), GFP_KERNEL);
if (!cvt)
return -ENOMEM;
cvt->nid = nid;
sprintf(name, "cvt %d", cvt->nid);
cvt->name = kstrdup(name, GFP_KERNEL);
list_add_tail(&cvt->head, &hdmi->cvt_list);
hdmi->num_cvt++;
return hdac_hdmi_query_cvt_params(&edev->hdev, cvt);
}
static int hdac_hdmi_parse_eld(struct hdac_ext_device *edev,
struct hdac_hdmi_port *port)
{
unsigned int ver, mnl;
ver = (port->eld.eld_buffer[DRM_ELD_VER] & DRM_ELD_VER_MASK)
>> DRM_ELD_VER_SHIFT;
if (ver != ELD_VER_CEA_861D && ver != ELD_VER_PARTIAL) {
dev_err(&edev->hdev.dev, "HDMI: Unknown ELD version %d\n", ver);
return -EINVAL;
}
mnl = (port->eld.eld_buffer[DRM_ELD_CEA_EDID_VER_MNL] &
DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
if (mnl > ELD_MAX_MNL) {
dev_err(&edev->hdev.dev, "HDMI: MNL Invalid %d\n", mnl);
return -EINVAL;
}
port->eld.info.spk_alloc = port->eld.eld_buffer[DRM_ELD_SPEAKER];
return 0;
}
static void hdac_hdmi_present_sense(struct hdac_hdmi_pin *pin,
struct hdac_hdmi_port *port)
{
struct hdac_ext_device *edev = pin->edev;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pcm *pcm;
int size = 0;
int port_id = -1;
if (!hdmi)
return;
/*
* In case of non MST pin, get_eld info API expectes port
* to be -1.
*/
mutex_lock(&hdmi->pin_mutex);
port->eld.monitor_present = false;
if (pin->mst_capable)
port_id = port->id;
size = snd_hdac_acomp_get_eld(&edev->hdev, pin->nid, port_id,
&port->eld.monitor_present,
port->eld.eld_buffer,
ELD_MAX_SIZE);
if (size > 0) {
size = min(size, ELD_MAX_SIZE);
if (hdac_hdmi_parse_eld(edev, port) < 0)
size = -EINVAL;
}
if (size > 0) {
port->eld.eld_valid = true;
port->eld.eld_size = size;
} else {
port->eld.eld_valid = false;
port->eld.eld_size = 0;
}
pcm = hdac_hdmi_get_pcm(edev, port);
if (!port->eld.monitor_present || !port->eld.eld_valid) {
dev_err(&edev->hdev.dev, "%s: disconnect for pin:port %d:%d\n",
__func__, pin->nid, port->id);
/*
* PCMs are not registered during device probe, so don't
* report jack here. It will be done in usermode mux
* control select.
*/
if (pcm)
hdac_hdmi_jack_report(pcm, port, false);
mutex_unlock(&hdmi->pin_mutex);
return;
}
if (port->eld.monitor_present && port->eld.eld_valid) {
if (pcm)
hdac_hdmi_jack_report(pcm, port, true);
print_hex_dump_debug("ELD: ", DUMP_PREFIX_OFFSET, 16, 1,
port->eld.eld_buffer, port->eld.eld_size, false);
}
mutex_unlock(&hdmi->pin_mutex);
}
static int hdac_hdmi_add_ports(struct hdac_hdmi_priv *hdmi,
struct hdac_hdmi_pin *pin)
{
struct hdac_hdmi_port *ports;
int max_ports = HDA_MAX_PORTS;
int i;
/*
* FIXME: max_port may vary for each platform, so pass this as
* as driver data or query from i915 interface when this API is
* implemented.
*/
ports = kcalloc(max_ports, sizeof(*ports), GFP_KERNEL);
if (!ports)
return -ENOMEM;
for (i = 0; i < max_ports; i++) {
ports[i].id = i;
ports[i].pin = pin;
}
pin->ports = ports;
pin->num_ports = max_ports;
return 0;
}
static int hdac_hdmi_add_pin(struct hdac_ext_device *edev, hda_nid_t nid)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pin *pin;
int ret;
pin = kzalloc(sizeof(*pin), GFP_KERNEL);
if (!pin)
return -ENOMEM;
pin->nid = nid;
pin->mst_capable = false;
pin->edev = edev;
ret = hdac_hdmi_add_ports(hdmi, pin);
if (ret < 0)
return ret;
list_add_tail(&pin->head, &hdmi->pin_list);
hdmi->num_pin++;
hdmi->num_ports += pin->num_ports;
return 0;
}
#define INTEL_VENDOR_NID 0x08
#define INTEL_GLK_VENDOR_NID 0x0b
#define INTEL_GET_VENDOR_VERB 0xf81
#define INTEL_SET_VENDOR_VERB 0x781
#define INTEL_EN_DP12 0x02 /* enable DP 1.2 features */
#define INTEL_EN_ALL_PIN_CVTS 0x01 /* enable 2nd & 3rd pins and convertors */
static void hdac_hdmi_skl_enable_all_pins(struct hdac_device *hdev)
{
unsigned int vendor_param;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
unsigned int vendor_nid = hdmi->drv_data->vendor_nid;
vendor_param = snd_hdac_codec_read(hdev, vendor_nid, 0,
INTEL_GET_VENDOR_VERB, 0);
if (vendor_param == -1 || vendor_param & INTEL_EN_ALL_PIN_CVTS)
return;
vendor_param |= INTEL_EN_ALL_PIN_CVTS;
vendor_param = snd_hdac_codec_read(hdev, vendor_nid, 0,
INTEL_SET_VENDOR_VERB, vendor_param);
if (vendor_param == -1)
return;
}
static void hdac_hdmi_skl_enable_dp12(struct hdac_device *hdev)
{
unsigned int vendor_param;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
unsigned int vendor_nid = hdmi->drv_data->vendor_nid;
vendor_param = snd_hdac_codec_read(hdev, vendor_nid, 0,
INTEL_GET_VENDOR_VERB, 0);
if (vendor_param == -1 || vendor_param & INTEL_EN_DP12)
return;
/* enable DP1.2 mode */
vendor_param |= INTEL_EN_DP12;
vendor_param = snd_hdac_codec_read(hdev, vendor_nid, 0,
INTEL_SET_VENDOR_VERB, vendor_param);
if (vendor_param == -1)
return;
}
static const 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,
.set_tdm_slot = hdac_hdmi_set_tdm_slot,
};
/*
* Each converter can support a stream independently. So a dai is created
* based on the number of converter queried.
*/
static int hdac_hdmi_create_dais(struct hdac_device *hdev,
struct snd_soc_dai_driver **dais,
struct hdac_hdmi_priv *hdmi, int num_dais)
{
struct snd_soc_dai_driver *hdmi_dais;
struct hdac_hdmi_cvt *cvt;
char name[NAME_SIZE], dai_name[NAME_SIZE];
int i = 0;
u32 rates, bps;
unsigned int rate_max = 384000, rate_min = 8000;
u64 formats;
int ret;
hdmi_dais = devm_kzalloc(&hdev->dev,
(sizeof(*hdmi_dais) * num_dais),
GFP_KERNEL);
if (!hdmi_dais)
return -ENOMEM;
list_for_each_entry(cvt, &hdmi->cvt_list, head) {
ret = snd_hdac_query_supported_pcm(hdev, cvt->nid,
&rates, &formats, &bps);
if (ret)
return ret;
sprintf(dai_name, "intel-hdmi-hifi%d", i+1);
hdmi_dais[i].name = devm_kstrdup(&hdev->dev,
dai_name, GFP_KERNEL);
if (!hdmi_dais[i].name)
return -ENOMEM;
snprintf(name, sizeof(name), "hifi%d", i+1);
hdmi_dais[i].playback.stream_name =
devm_kstrdup(&hdev->dev, name, GFP_KERNEL);
if (!hdmi_dais[i].playback.stream_name)
return -ENOMEM;
/*
* Set caps based on capability queried from the converter.
* It will be constrained runtime based on ELD queried.
*/
hdmi_dais[i].playback.formats = formats;
hdmi_dais[i].playback.rates = rates;
hdmi_dais[i].playback.rate_max = rate_max;
hdmi_dais[i].playback.rate_min = rate_min;
hdmi_dais[i].playback.channels_min = 2;
hdmi_dais[i].playback.channels_max = 2;
hdmi_dais[i].playback.sig_bits = bps;
hdmi_dais[i].ops = &hdmi_dai_ops;
i++;
}
*dais = hdmi_dais;
hdmi->dai_drv = hdmi_dais;
return 0;
}
/*
* 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,
struct snd_soc_dai_driver **dais, int *num_dais)
{
hda_nid_t nid;
int i, num_nodes;
struct hdac_hdmi_cvt *temp_cvt, *cvt_next;
struct hdac_hdmi_pin *temp_pin, *pin_next;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_device *hdev = &edev->hdev;
int ret;
hdac_hdmi_skl_enable_all_pins(hdev);
hdac_hdmi_skl_enable_dp12(hdev);
num_nodes = snd_hdac_get_sub_nodes(hdev, hdev->afg, &nid);
if (!nid || num_nodes <= 0) {
dev_warn(&hdev->dev, "HDMI: failed to get afg sub nodes\n");
return -EINVAL;
}
for (i = 0; i < num_nodes; i++, nid++) {
unsigned int caps;
unsigned int type;
caps = get_wcaps(hdev, nid);
type = get_wcaps_type(caps);
if (!(caps & AC_WCAP_DIGITAL))
continue;
switch (type) {
case AC_WID_AUD_OUT:
ret = hdac_hdmi_add_cvt(edev, nid);
if (ret < 0)
goto free_widgets;
break;
case AC_WID_PIN:
ret = hdac_hdmi_add_pin(edev, nid);
if (ret < 0)
goto free_widgets;
break;
}
}
if (!hdmi->num_pin || !hdmi->num_cvt) {
ret = -EIO;
goto free_widgets;
}
ret = hdac_hdmi_create_dais(hdev, dais, hdmi, hdmi->num_cvt);
if (ret) {
dev_err(&hdev->dev, "Failed to create dais with err: %d\n",
ret);
goto free_widgets;
}
*num_dais = hdmi->num_cvt;
ret = hdac_hdmi_init_dai_map(edev);
if (ret < 0)
goto free_widgets;
return ret;
free_widgets:
list_for_each_entry_safe(temp_cvt, cvt_next, &hdmi->cvt_list, head) {
list_del(&temp_cvt->head);
kfree(temp_cvt->name);
kfree(temp_cvt);
}
list_for_each_entry_safe(temp_pin, pin_next, &hdmi->pin_list, head) {
for (i = 0; i < temp_pin->num_ports; i++)
temp_pin->ports[i].pin = NULL;
kfree(temp_pin->ports);
list_del(&temp_pin->head);
kfree(temp_pin);
}
return ret;
}
static void hdac_hdmi_eld_notify_cb(void *aptr, int port, int pipe)
{
struct hdac_ext_device *edev = aptr;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pin *pin = NULL;
struct hdac_hdmi_port *hport = NULL;
struct snd_soc_component *component = edev->scodec;
int i;
/* Don't know how this mapping is derived */
hda_nid_t pin_nid = port + 0x04;
dev_dbg(&edev->hdev.dev, "%s: for pin:%d port=%d\n", __func__,
pin_nid, pipe);
/*
* skip notification during system suspend (but not in runtime PM);
* the state will be updated at resume. Also since the ELD and
* connection states are updated in anyway at the end of the resume,
* we can skip it when received during PM process.
*/
if (snd_power_get_state(component->card->snd_card) !=
SNDRV_CTL_POWER_D0)
return;
if (atomic_read(&edev->hdev.in_pm))
return;
list_for_each_entry(pin, &hdmi->pin_list, head) {
if (pin->nid != pin_nid)
continue;
/* In case of non MST pin, pipe is -1 */
if (pipe == -1) {
pin->mst_capable = false;
/* if not MST, default is port[0] */
hport = &pin->ports[0];
} else {
for (i = 0; i < pin->num_ports; i++) {
pin->mst_capable = true;
if (pin->ports[i].id == pipe) {
hport = &pin->ports[i];
break;
}
}
}
if (hport)
hdac_hdmi_present_sense(pin, hport);
}
}
static struct i915_audio_component_audio_ops aops = {
.pin_eld_notify = hdac_hdmi_eld_notify_cb,
};
static struct snd_pcm *hdac_hdmi_get_pcm_from_id(struct snd_soc_card *card,
int device)
{
struct snd_soc_pcm_runtime *rtd;
list_for_each_entry(rtd, &card->rtd_list, list) {
if (rtd->pcm && (rtd->pcm->device == device))
return rtd->pcm;
}
return NULL;
}
/* create jack pin kcontrols */
static int create_fill_jack_kcontrols(struct snd_soc_card *card,
struct hdac_ext_device *edev)
{
struct hdac_hdmi_pin *pin;
struct snd_kcontrol_new *kc;
char kc_name[NAME_SIZE], xname[NAME_SIZE];
char *name;
int i = 0, j;
struct snd_soc_component *component = edev->scodec;
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
kc = devm_kcalloc(component->dev, hdmi->num_ports,
sizeof(*kc), GFP_KERNEL);
if (!kc)
return -ENOMEM;
list_for_each_entry(pin, &hdmi->pin_list, head) {
for (j = 0; j < pin->num_ports; j++) {
snprintf(xname, sizeof(xname), "hif%d-%d Jack",
pin->nid, pin->ports[j].id);
name = devm_kstrdup(component->dev, xname, GFP_KERNEL);
if (!name)
return -ENOMEM;
snprintf(kc_name, sizeof(kc_name), "%s Switch", xname);
kc[i].name = devm_kstrdup(component->dev, kc_name,
GFP_KERNEL);
if (!kc[i].name)
return -ENOMEM;
kc[i].private_value = (unsigned long)name;
kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
kc[i].access = 0;
kc[i].info = snd_soc_dapm_info_pin_switch;
kc[i].put = snd_soc_dapm_put_pin_switch;
kc[i].get = snd_soc_dapm_get_pin_switch;
i++;
}
}
return snd_soc_add_card_controls(card, kc, i);
}
int hdac_hdmi_jack_port_init(struct snd_soc_component *component,
struct snd_soc_dapm_context *dapm)
{
struct hdac_ext_device *edev = snd_soc_component_get_drvdata(component);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pin *pin;
struct snd_soc_dapm_widget *widgets;
struct snd_soc_dapm_route *route;
char w_name[NAME_SIZE];
int i = 0, j, ret;
widgets = devm_kcalloc(dapm->dev, hdmi->num_ports,
sizeof(*widgets), GFP_KERNEL);
if (!widgets)
return -ENOMEM;
route = devm_kcalloc(dapm->dev, hdmi->num_ports,
sizeof(*route), GFP_KERNEL);
if (!route)
return -ENOMEM;
/* create Jack DAPM widget */
list_for_each_entry(pin, &hdmi->pin_list, head) {
for (j = 0; j < pin->num_ports; j++) {
snprintf(w_name, sizeof(w_name), "hif%d-%d Jack",
pin->nid, pin->ports[j].id);
ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
snd_soc_dapm_spk, NULL,
w_name, NULL, NULL, 0, NULL, 0);
if (ret < 0)
return ret;
pin->ports[j].jack_pin = widgets[i].name;
pin->ports[j].dapm = dapm;
/* add to route from Jack widget to output */
hdac_hdmi_fill_route(&route[i], pin->ports[j].jack_pin,
NULL, pin->ports[j].output_pin, NULL);
i++;
}
}
/* Add Route from Jack widget to the output widget */
ret = snd_soc_dapm_new_controls(dapm, widgets, hdmi->num_ports);
if (ret < 0)
return ret;
ret = snd_soc_dapm_add_routes(dapm, route, hdmi->num_ports);
if (ret < 0)
return ret;
ret = snd_soc_dapm_new_widgets(dapm->card);
if (ret < 0)
return ret;
/* Add Jack Pin switch Kcontrol */
ret = create_fill_jack_kcontrols(dapm->card, edev);
if (ret < 0)
return ret;
/* default set the Jack Pin switch to OFF */
list_for_each_entry(pin, &hdmi->pin_list, head) {
for (j = 0; j < pin->num_ports; j++)
snd_soc_dapm_disable_pin(pin->ports[j].dapm,
pin->ports[j].jack_pin);
}
return 0;
}
EXPORT_SYMBOL_GPL(hdac_hdmi_jack_port_init);
int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int device,
struct snd_soc_jack *jack)
{
struct snd_soc_component *component = dai->component;
struct hdac_ext_device *edev = snd_soc_component_get_drvdata(component);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pcm *pcm;
struct snd_pcm *snd_pcm;
int err;
/*
* this is a new PCM device, create new pcm and
* add to the pcm list
*/
pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
if (!pcm)
return -ENOMEM;
pcm->pcm_id = device;
pcm->cvt = hdmi->dai_map[dai->id].cvt;
pcm->jack_event = 0;
pcm->jack = jack;
mutex_init(&pcm->lock);
INIT_LIST_HEAD(&pcm->port_list);
snd_pcm = hdac_hdmi_get_pcm_from_id(dai->component->card, device);
if (snd_pcm) {
err = snd_hdac_add_chmap_ctls(snd_pcm, device, &hdmi->chmap);
if (err < 0) {
dev_err(&edev->hdev.dev,
"chmap control add failed with err: %d for pcm: %d\n",
err, device);
kfree(pcm);
return err;
}
}
list_add_tail(&pcm->head, &hdmi->pcm_list);
return 0;
}
EXPORT_SYMBOL_GPL(hdac_hdmi_jack_init);
static void hdac_hdmi_present_sense_all_pins(struct hdac_ext_device *edev,
struct hdac_hdmi_priv *hdmi, bool detect_pin_caps)
{
int i;
struct hdac_hdmi_pin *pin;
list_for_each_entry(pin, &hdmi->pin_list, head) {
if (detect_pin_caps) {
if (hdac_hdmi_get_port_len(edev, pin->nid) == 0)
pin->mst_capable = false;
else
pin->mst_capable = true;
}
for (i = 0; i < pin->num_ports; i++) {
if (!pin->mst_capable && i > 0)
continue;
hdac_hdmi_present_sense(pin, &pin->ports[i]);
}
}
}
static int hdmi_codec_probe(struct snd_soc_component *component)
{
struct hdac_ext_device *edev = snd_soc_component_get_drvdata(component);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct snd_soc_dapm_context *dapm =
snd_soc_component_get_dapm(component);
struct hdac_ext_link *hlink = NULL;
int ret;
edev->scodec = component;
/*
* hold the ref while we probe, also no need to drop the ref on
* exit, we call pm_runtime_suspend() so that will do for us
*/
hlink = snd_hdac_ext_bus_get_link(edev->ebus, dev_name(&edev->hdev.dev));
if (!hlink) {
dev_err(&edev->hdev.dev, "hdac link not found\n");
return -EIO;
}
snd_hdac_ext_bus_link_get(edev->ebus, hlink);
ret = create_fill_widget_route_map(dapm);
if (ret < 0)
return ret;
aops.audio_ptr = edev;
ret = snd_hdac_i915_register_notifier(&aops);
if (ret < 0) {
dev_err(&edev->hdev.dev, "notifier register failed: err: %d\n",
ret);
return ret;
}
hdac_hdmi_present_sense_all_pins(edev, hdmi, true);
/* 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->hdev.dev);
pm_runtime_put(&edev->hdev.dev);
pm_runtime_suspend(&edev->hdev.dev);
return 0;
}
static void hdmi_codec_remove(struct snd_soc_component *component)
{
struct hdac_ext_device *edev = snd_soc_component_get_drvdata(component);
pm_runtime_disable(&edev->hdev.dev);
}
#ifdef CONFIG_PM
static int hdmi_codec_prepare(struct device *dev)
{
struct hdac_ext_device *edev = to_hda_ext_device(dev);
struct hdac_device *hdev = &edev->hdev;
pm_runtime_get_sync(&edev->hdev.dev);
/*
* Power down afg.
* codec_read is preferred over codec_write to set the power state.
* This way verb is send to set the power state and response
* is received. So setting power state is ensured without using loop
* to read the state.
*/
snd_hdac_codec_read(hdev, hdev->afg, 0, AC_VERB_SET_POWER_STATE,
AC_PWRST_D3);
return 0;
}
static void hdmi_codec_complete(struct device *dev)
{
struct hdac_ext_device *edev = to_hda_ext_device(dev);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_device *hdev = &edev->hdev;
/* Power up afg */
snd_hdac_codec_read(hdev, hdev->afg, 0, AC_VERB_SET_POWER_STATE,
AC_PWRST_D0);
hdac_hdmi_skl_enable_all_pins(&edev->hdev);
hdac_hdmi_skl_enable_dp12(&edev->hdev);
/*
* As the ELD notify callback request is not entertained while the
* device is in suspend state. Need to manually check detection of
* all pins here. pin capablity change is not support, so use the
* already set pin caps.
*/
hdac_hdmi_present_sense_all_pins(edev, hdmi, false);
pm_runtime_put_sync(&edev->hdev.dev);
}
#else
#define hdmi_codec_prepare NULL
#define hdmi_codec_complete NULL
#endif
static const struct snd_soc_component_driver hdmi_hda_codec = {
.probe = hdmi_codec_probe,
.remove = hdmi_codec_remove,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static void hdac_hdmi_get_chmap(struct hdac_device *hdev, int pcm_idx,
unsigned char *chmap)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
memcpy(chmap, pcm->chmap, ARRAY_SIZE(pcm->chmap));
}
static void hdac_hdmi_set_chmap(struct hdac_device *hdev, int pcm_idx,
unsigned char *chmap, int prepared)
{
struct hdac_ext_device *edev = to_ehdac_device(hdev);
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
struct hdac_hdmi_port *port;
if (!pcm)
return;
if (list_empty(&pcm->port_list))
return;
mutex_lock(&pcm->lock);
pcm->chmap_set = true;
memcpy(pcm->chmap, chmap, ARRAY_SIZE(pcm->chmap));
list_for_each_entry(port, &pcm->port_list, head)
if (prepared)
hdac_hdmi_setup_audio_infoframe(edev, pcm, port);
mutex_unlock(&pcm->lock);
}
static bool is_hdac_hdmi_pcm_attached(struct hdac_device *hdev, int pcm_idx)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
if (!pcm)
return false;
if (list_empty(&pcm->port_list))
return false;
return true;
}
static int hdac_hdmi_get_spk_alloc(struct hdac_device *hdev, int pcm_idx)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev);
struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
struct hdac_hdmi_port *port;
if (!pcm)
return 0;
if (list_empty(&pcm->port_list))
return 0;
port = list_first_entry(&pcm->port_list, struct hdac_hdmi_port, head);
if (!port)
return 0;
if (!port || !port->eld.eld_valid)
return 0;
return port->eld.info.spk_alloc;
}
static struct hdac_hdmi_drv_data intel_glk_drv_data = {
.vendor_nid = INTEL_GLK_VENDOR_NID,
};
static struct hdac_hdmi_drv_data intel_drv_data = {
.vendor_nid = INTEL_VENDOR_NID,
};
static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
{
struct hdac_device *hdev = &edev->hdev;
struct hdac_hdmi_priv *hdmi_priv;
struct snd_soc_dai_driver *hdmi_dais = NULL;
struct hdac_ext_link *hlink = NULL;
int num_dais = 0;
int ret = 0;
struct hdac_driver *hdrv = drv_to_hdac_driver(hdev->dev.driver);
const struct hda_device_id *hdac_id = hdac_get_device_id(hdev, hdrv);
/* hold the ref while we probe */
hlink = snd_hdac_ext_bus_get_link(edev->ebus, dev_name(&edev->hdev.dev));
if (!hlink) {
dev_err(&edev->hdev.dev, "hdac link not found\n");
return -EIO;
}
snd_hdac_ext_bus_link_get(edev->ebus, hlink);
hdmi_priv = devm_kzalloc(&hdev->dev, sizeof(*hdmi_priv), GFP_KERNEL);
if (hdmi_priv == NULL)
return -ENOMEM;
edev->private_data = hdmi_priv;
snd_hdac_register_chmap_ops(hdev, &hdmi_priv->chmap);
hdmi_priv->chmap.ops.get_chmap = hdac_hdmi_get_chmap;
hdmi_priv->chmap.ops.set_chmap = hdac_hdmi_set_chmap;
hdmi_priv->chmap.ops.is_pcm_attached = is_hdac_hdmi_pcm_attached;
hdmi_priv->chmap.ops.get_spk_alloc = hdac_hdmi_get_spk_alloc;
if (!hdac_id)
return -ENODEV;
if (hdac_id->driver_data)
hdmi_priv->drv_data =
(struct hdac_hdmi_drv_data *)hdac_id->driver_data;
else
hdmi_priv->drv_data = &intel_drv_data;
dev_set_drvdata(&hdev->dev, edev);
INIT_LIST_HEAD(&hdmi_priv->pin_list);
INIT_LIST_HEAD(&hdmi_priv->cvt_list);
INIT_LIST_HEAD(&hdmi_priv->pcm_list);
mutex_init(&hdmi_priv->pin_mutex);
/*
* Turned off in the runtime_suspend during the first explicit
* pm_runtime_suspend call.
*/
ret = snd_hdac_display_power(edev->hdev.bus, true);
if (ret < 0) {
dev_err(&edev->hdev.dev,
"Cannot turn on display power on i915 err: %d\n",
ret);
return ret;
}
ret = hdac_hdmi_parse_and_map_nid(edev, &hdmi_dais, &num_dais);
if (ret < 0) {
dev_err(&hdev->dev,
"Failed in parse and map nid with err: %d\n", ret);
return ret;
}
snd_hdac_refresh_widgets(hdev, true);
/* ASoC specific initialization */
ret = devm_snd_soc_register_component(&hdev->dev, &hdmi_hda_codec,
hdmi_dais, num_dais);
snd_hdac_ext_bus_link_put(edev->ebus, hlink);
return ret;
}
static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev)
{
struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(&edev->hdev);
struct hdac_hdmi_pin *pin, *pin_next;
struct hdac_hdmi_cvt *cvt, *cvt_next;
struct hdac_hdmi_pcm *pcm, *pcm_next;
struct hdac_hdmi_port *port, *port_next;
int i;
list_for_each_entry_safe(pcm, pcm_next, &hdmi->pcm_list, head) {
pcm->cvt = NULL;
if (list_empty(&pcm->port_list))
continue;
list_for_each_entry_safe(port, port_next,
&pcm->port_list, head)
list_del(&port->head);
list_del(&pcm->head);
kfree(pcm);
}
list_for_each_entry_safe(cvt, cvt_next, &hdmi->cvt_list, head) {
list_del(&cvt->head);
kfree(cvt->name);
kfree(cvt);
}
list_for_each_entry_safe(pin, pin_next, &hdmi->pin_list, head) {
for (i = 0; i < pin->num_ports; i++)
pin->ports[i].pin = NULL;
kfree(pin->ports);
list_del(&pin->head);
kfree(pin);
}
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 *hdev = &edev->hdev;
struct hdac_bus *bus = hdev->bus;
struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
struct hdac_ext_link *hlink = NULL;
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.
* codec_read is preferred over codec_write to set the power state.
* This way verb is send to set the power state and response
* is received. So setting power state is ensured without using loop
* to read the state.
*/
snd_hdac_codec_read(hdev, hdev->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;
}
hlink = snd_hdac_ext_bus_get_link(ebus, dev_name(dev));
if (!hlink) {
dev_err(dev, "hdac link not found\n");
return -EIO;
}
snd_hdac_ext_bus_link_put(ebus, hlink);
return 0;
}
static int hdac_hdmi_runtime_resume(struct device *dev)
{
struct hdac_ext_device *edev = to_hda_ext_device(dev);
struct hdac_device *hdev = &edev->hdev;
struct hdac_bus *bus = hdev->bus;
struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
struct hdac_ext_link *hlink = NULL;
int err;
dev_dbg(dev, "Enter: %s\n", __func__);
/* controller may not have been initialized for the first time */
if (!bus)
return 0;
hlink = snd_hdac_ext_bus_get_link(ebus, dev_name(dev));
if (!hlink) {
dev_err(dev, "hdac link not found\n");
return -EIO;
}
snd_hdac_ext_bus_link_get(ebus, hlink);
err = snd_hdac_display_power(bus, true);
if (err < 0) {
dev_err(bus->dev, "Cannot turn on display power on i915\n");
return err;
}
hdac_hdmi_skl_enable_all_pins(&edev->hdev);
hdac_hdmi_skl_enable_dp12(&edev->hdev);
/* Power up afg */
snd_hdac_codec_read(hdev, hdev->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)
.prepare = hdmi_codec_prepare,
.complete = hdmi_codec_complete,
};
static const struct hda_device_id hdmi_list[] = {
HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),
HDA_CODEC_EXT_ENTRY(0x8086280a, 0x100000, "Broxton HDMI", 0),
HDA_CODEC_EXT_ENTRY(0x8086280b, 0x100000, "Kabylake HDMI", 0),
HDA_CODEC_EXT_ENTRY(0x8086280c, 0x100000, "Cannonlake HDMI",
&intel_glk_drv_data),
HDA_CODEC_EXT_ENTRY(0x8086280d, 0x100000, "Geminilake HDMI",
&intel_glk_drv_data),
{}
};
MODULE_DEVICE_TABLE(hdaudio, hdmi_list);
static struct hdac_ext_driver hdmi_driver = {
. hdac = {
.driver = {
.name = "HDMI HDA Codec",
.pm = &hdac_hdmi_pm,
},
.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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