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kernel/sound/soc/codecs/hdmi-codec.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* ALSA SoC codec for HDMI encoder drivers
* Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
* Author: Jyri Sarha <jsarha@ti.com>
*/
#include <linux/module.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/pcm_drm_eld.h>
#include <sound/hdmi-codec.h>
#include <sound/pcm_iec958.h>
#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
#define HDMI_CODEC_CHMAP_IDX_UNKNOWN -1
/*
* CEA speaker placement for HDMI 1.4:
*
* FL FLC FC FRC FR FRW
*
* LFE
*
* RL RLC RC RRC RR
*
* Speaker placement has to be extended to support HDMI 2.0
*/
enum hdmi_codec_cea_spk_placement {
FL = BIT(0), /* Front Left */
FC = BIT(1), /* Front Center */
FR = BIT(2), /* Front Right */
FLC = BIT(3), /* Front Left Center */
FRC = BIT(4), /* Front Right Center */
RL = BIT(5), /* Rear Left */
RC = BIT(6), /* Rear Center */
RR = BIT(7), /* Rear Right */
RLC = BIT(8), /* Rear Left Center */
RRC = BIT(9), /* Rear Right Center */
LFE = BIT(10), /* Low Frequency Effect */
};
/*
* cea Speaker allocation structure
*/
struct hdmi_codec_cea_spk_alloc {
const int ca_id;
unsigned int n_ch;
unsigned long mask;
};
/* Channel maps stereo HDMI */
static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
{ .channels = 2,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
{ }
};
/* Channel maps for multi-channel playbacks, up to 8 n_ch */
static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
{ .channels = 2, /* CA_ID 0x00 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
{ .channels = 4, /* CA_ID 0x01 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA } },
{ .channels = 4, /* CA_ID 0x02 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC } },
{ .channels = 4, /* CA_ID 0x03 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC } },
{ .channels = 6, /* CA_ID 0x04 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 6, /* CA_ID 0x05 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 6, /* CA_ID 0x06 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 6, /* CA_ID 0x07 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 6, /* CA_ID 0x08 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6, /* CA_ID 0x09 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6, /* CA_ID 0x0A */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6, /* CA_ID 0x0B */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 8, /* CA_ID 0x0C */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 8, /* CA_ID 0x0D */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 8, /* CA_ID 0x0E */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 8, /* CA_ID 0x0F */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
{ .channels = 8, /* CA_ID 0x10 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
{ .channels = 8, /* CA_ID 0x11 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
{ .channels = 8, /* CA_ID 0x12 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
{ .channels = 8, /* CA_ID 0x13 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
{ .channels = 8, /* CA_ID 0x14 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x15 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x16 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x17 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x18 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x19 */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x1A */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x1B */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x1C */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x1D */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x1E */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ .channels = 8, /* CA_ID 0x1F */
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
{ }
};
/*
* hdmi_codec_channel_alloc: speaker configuration available for CEA
*
* This is an ordered list where ca_id must exist in hdmi_codec_8ch_chmaps
* The preceding ones have better chances to be selected by
* hdmi_codec_get_ch_alloc_table_idx().
*/
static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
{ .ca_id = 0x00, .n_ch = 2,
.mask = FL | FR },
{ .ca_id = 0x03, .n_ch = 4,
.mask = FL | FR | LFE | FC },
{ .ca_id = 0x02, .n_ch = 4,
.mask = FL | FR | FC },
{ .ca_id = 0x01, .n_ch = 4,
.mask = FL | FR | LFE },
{ .ca_id = 0x0b, .n_ch = 6,
.mask = FL | FR | LFE | FC | RL | RR },
{ .ca_id = 0x0a, .n_ch = 6,
.mask = FL | FR | FC | RL | RR },
{ .ca_id = 0x09, .n_ch = 6,
.mask = FL | FR | LFE | RL | RR },
{ .ca_id = 0x08, .n_ch = 6,
.mask = FL | FR | RL | RR },
{ .ca_id = 0x07, .n_ch = 6,
.mask = FL | FR | LFE | FC | RC },
{ .ca_id = 0x06, .n_ch = 6,
.mask = FL | FR | FC | RC },
{ .ca_id = 0x05, .n_ch = 6,
.mask = FL | FR | LFE | RC },
{ .ca_id = 0x04, .n_ch = 6,
.mask = FL | FR | RC },
{ .ca_id = 0x13, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
{ .ca_id = 0x1f, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
{ .ca_id = 0x12, .n_ch = 8,
.mask = FL | FR | FC | RL | RR | RLC | RRC },
{ .ca_id = 0x1e, .n_ch = 8,
.mask = FL | FR | FC | RL | RR | FLC | FRC },
{ .ca_id = 0x11, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR | RLC | RRC },
{ .ca_id = 0x1d, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR | FLC | FRC },
{ .ca_id = 0x10, .n_ch = 8,
.mask = FL | FR | RL | RR | RLC | RRC },
{ .ca_id = 0x1c, .n_ch = 8,
.mask = FL | FR | RL | RR | FLC | FRC },
{ .ca_id = 0x0f, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR | RC },
{ .ca_id = 0x1b, .n_ch = 8,
.mask = FL | FR | LFE | RC | FC | FLC | FRC },
{ .ca_id = 0x0e, .n_ch = 8,
.mask = FL | FR | FC | RL | RR | RC },
{ .ca_id = 0x1a, .n_ch = 8,
.mask = FL | FR | RC | FC | FLC | FRC },
{ .ca_id = 0x0d, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR | RC },
{ .ca_id = 0x19, .n_ch = 8,
.mask = FL | FR | LFE | RC | FLC | FRC },
{ .ca_id = 0x0c, .n_ch = 8,
.mask = FL | FR | RC | RL | RR },
{ .ca_id = 0x18, .n_ch = 8,
.mask = FL | FR | RC | FLC | FRC },
{ .ca_id = 0x17, .n_ch = 8,
.mask = FL | FR | LFE | FC | FLC | FRC },
{ .ca_id = 0x16, .n_ch = 8,
.mask = FL | FR | FC | FLC | FRC },
{ .ca_id = 0x15, .n_ch = 8,
.mask = FL | FR | LFE | FLC | FRC },
{ .ca_id = 0x14, .n_ch = 8,
.mask = FL | FR | FLC | FRC },
{ .ca_id = 0x0b, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR },
{ .ca_id = 0x0a, .n_ch = 8,
.mask = FL | FR | FC | RL | RR },
{ .ca_id = 0x09, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR },
{ .ca_id = 0x08, .n_ch = 8,
.mask = FL | FR | RL | RR },
{ .ca_id = 0x07, .n_ch = 8,
.mask = FL | FR | LFE | FC | RC },
{ .ca_id = 0x06, .n_ch = 8,
.mask = FL | FR | FC | RC },
{ .ca_id = 0x05, .n_ch = 8,
.mask = FL | FR | LFE | RC },
{ .ca_id = 0x04, .n_ch = 8,
.mask = FL | FR | RC },
{ .ca_id = 0x03, .n_ch = 8,
.mask = FL | FR | LFE | FC },
{ .ca_id = 0x02, .n_ch = 8,
.mask = FL | FR | FC },
{ .ca_id = 0x01, .n_ch = 8,
.mask = FL | FR | LFE },
};
struct hdmi_codec_priv {
struct hdmi_codec_pdata hcd;
uint8_t eld[MAX_ELD_BYTES];
struct snd_pcm_chmap *chmap_info;
unsigned int chmap_idx;
struct mutex lock;
bool busy;
struct snd_soc_jack *jack;
unsigned int jack_status;
u8 iec_status[AES_IEC958_STATUS_SIZE];
};
static const struct snd_soc_dapm_widget hdmi_widgets[] = {
SND_SOC_DAPM_OUTPUT("TX"),
SND_SOC_DAPM_OUTPUT("RX"),
};
enum {
DAI_ID_I2S = 0,
DAI_ID_SPDIF,
};
static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
uinfo->count = sizeof_field(struct hdmi_codec_priv, eld);
return 0;
}
static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
return 0;
}
static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
{
int i;
static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
[0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
[4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
};
unsigned long spk_mask = 0;
for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
if (spk_alloc & (1 << i))
spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
}
return spk_mask;
}
static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
{
u8 spk_alloc;
unsigned long spk_mask;
spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
/* Detect if only stereo supported, else return 8 channels mappings */
if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
else
hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
}
static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
unsigned char channels)
{
int i;
u8 spk_alloc;
unsigned long spk_mask;
const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
/* If spk_alloc == 0, HDMI is unplugged return stereo config*/
if (!spk_alloc && cap->ca_id == 0)
return i;
if (cap->n_ch != channels)
continue;
if (!(cap->mask == (spk_mask & cap->mask)))
continue;
return i;
}
return -EINVAL;
}
static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
unsigned const char *map;
unsigned int i;
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = info->private_data;
if (hcp->chmap_idx != HDMI_CODEC_CHMAP_IDX_UNKNOWN)
map = info->chmap[hcp->chmap_idx].map;
for (i = 0; i < info->max_channels; i++) {
if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
ucontrol->value.integer.value[i] = 0;
else
ucontrol->value.integer.value[i] = map[i];
}
return 0;
}
static int hdmi_codec_iec958_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
uinfo->count = 1;
return 0;
}
static int hdmi_codec_iec958_default_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
memcpy(ucontrol->value.iec958.status, hcp->iec_status,
sizeof(hcp->iec_status));
return 0;
}
static int hdmi_codec_iec958_default_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
memcpy(hcp->iec_status, ucontrol->value.iec958.status,
sizeof(hcp->iec_status));
return 0;
}
static int hdmi_codec_iec958_mask_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
memset(ucontrol->value.iec958.status, 0xff,
sizeof_field(struct hdmi_codec_priv, iec_status));
return 0;
}
static int hdmi_codec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
bool has_capture = !hcp->hcd.no_i2s_capture;
bool has_playback = !hcp->hcd.no_i2s_playback;
int ret = 0;
if (!((has_playback && tx) || (has_capture && !tx)))
return 0;
mutex_lock(&hcp->lock);
if (hcp->busy) {
dev_err(dai->dev, "Only one simultaneous stream supported!\n");
mutex_unlock(&hcp->lock);
return -EINVAL;
}
if (hcp->hcd.ops->audio_startup) {
ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
if (ret)
goto err;
}
if (tx && hcp->hcd.ops->get_eld) {
ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
hcp->eld, sizeof(hcp->eld));
if (ret)
goto err;
ret = snd_pcm_hw_constraint_eld(substream->runtime, hcp->eld);
if (ret)
goto err;
/* Select chmap supported */
hdmi_codec_eld_chmap(hcp);
}
hcp->busy = true;
err:
mutex_unlock(&hcp->lock);
return ret;
}
static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
bool has_capture = !hcp->hcd.no_i2s_capture;
bool has_playback = !hcp->hcd.no_i2s_playback;
if (!((has_playback && tx) || (has_capture && !tx)))
return;
hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
mutex_lock(&hcp->lock);
hcp->busy = false;
mutex_unlock(&hcp->lock);
}
static int hdmi_codec_fill_codec_params(struct snd_soc_dai *dai,
unsigned int sample_width,
unsigned int sample_rate,
unsigned int channels,
struct hdmi_codec_params *hp)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
int idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
u8 ca_id = 0;
bool pcm_audio = !(hcp->iec_status[0] & IEC958_AES0_NONAUDIO);
if (pcm_audio) {
/* Select a channel allocation that matches with ELD and pcm channels */
idx = hdmi_codec_get_ch_alloc_table_idx(hcp, channels);
if (idx < 0) {
dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
idx);
hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
return idx;
}
ca_id = hdmi_codec_channel_alloc[idx].ca_id;
}
memset(hp, 0, sizeof(*hp));
hdmi_audio_infoframe_init(&hp->cea);
if (pcm_audio)
hp->cea.channels = channels;
else
hp->cea.channels = 0;
hp->cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
hp->cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
hp->cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
hp->cea.channel_allocation = ca_id;
hp->sample_width = sample_width;
hp->sample_rate = sample_rate;
hp->channels = channels;
if (pcm_audio)
hcp->chmap_idx = ca_id;
else
hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
return 0;
}
static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
struct hdmi_codec_daifmt *cf = snd_soc_dai_dma_data_get_playback(dai);
struct hdmi_codec_params hp = {
.iec = {
.status = { 0 },
.subcode = { 0 },
.pad = 0,
.dig_subframe = { 0 },
}
};
int ret;
if (!hcp->hcd.ops->hw_params)
return 0;
dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
params_width(params), params_rate(params),
params_channels(params));
ret = hdmi_codec_fill_codec_params(dai,
params_width(params),
params_rate(params),
params_channels(params),
&hp);
if (ret < 0)
return ret;
memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status));
ret = snd_pcm_fill_iec958_consumer_hw_params(params, hp.iec.status,
sizeof(hp.iec.status));
if (ret < 0) {
dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
ret);
return ret;
}
cf->bit_fmt = params_format(params);
return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
cf, &hp);
}
static int hdmi_codec_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
struct hdmi_codec_daifmt *cf = snd_soc_dai_dma_data_get_playback(dai);
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int channels = runtime->channels;
unsigned int width = snd_pcm_format_width(runtime->format);
unsigned int rate = runtime->rate;
struct hdmi_codec_params hp;
int ret;
if (!hcp->hcd.ops->prepare)
return 0;
dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
width, rate, channels);
ret = hdmi_codec_fill_codec_params(dai, width, rate, channels, &hp);
if (ret < 0)
return ret;
memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status));
ret = snd_pcm_fill_iec958_consumer(runtime, hp.iec.status,
sizeof(hp.iec.status));
if (ret < 0) {
dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
ret);
return ret;
}
cf->bit_fmt = runtime->format;
return hcp->hcd.ops->prepare(dai->dev->parent, hcp->hcd.data,
cf, &hp);
}
static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai,
unsigned int fmt)
{
struct hdmi_codec_daifmt *cf = snd_soc_dai_dma_data_get_playback(dai);
/* Reset daifmt */
memset(cf, 0, sizeof(*cf));
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBP_CFP:
cf->bit_clk_provider = 1;
cf->frame_clk_provider = 1;
break;
case SND_SOC_DAIFMT_CBC_CFP:
cf->frame_clk_provider = 1;
break;
case SND_SOC_DAIFMT_CBP_CFC:
cf->bit_clk_provider = 1;
break;
case SND_SOC_DAIFMT_CBC_CFC:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
cf->frame_clk_inv = 1;
break;
case SND_SOC_DAIFMT_IB_NF:
cf->bit_clk_inv = 1;
break;
case SND_SOC_DAIFMT_IB_IF:
cf->frame_clk_inv = 1;
cf->bit_clk_inv = 1;
break;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
cf->fmt = HDMI_I2S;
break;
case SND_SOC_DAIFMT_DSP_A:
cf->fmt = HDMI_DSP_A;
break;
case SND_SOC_DAIFMT_DSP_B:
cf->fmt = HDMI_DSP_B;
break;
case SND_SOC_DAIFMT_RIGHT_J:
cf->fmt = HDMI_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
cf->fmt = HDMI_LEFT_J;
break;
case SND_SOC_DAIFMT_AC97:
cf->fmt = HDMI_AC97;
break;
default:
dev_err(dai->dev, "Invalid DAI interface format\n");
return -EINVAL;
}
return 0;
}
static int hdmi_codec_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
/*
* ignore if direction was CAPTURE
* and it had .no_capture_mute flag
* see
* snd_soc_dai_digital_mute()
*/
if (hcp->hcd.ops->mute_stream &&
(direction == SNDRV_PCM_STREAM_PLAYBACK ||
!hcp->hcd.ops->no_capture_mute))
return hcp->hcd.ops->mute_stream(dai->dev->parent,
hcp->hcd.data,
mute, direction);
return -ENOTSUPP;
}
/*
* This driver can select all SND_SOC_DAIFMT_CBx_CFx,
* but need to be selected from Sound Card, not be auto selected.
* Because it might be used from other driver.
* For example,
* ${LINUX}/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
*/
static const u64 hdmi_codec_formats =
SND_SOC_POSSIBLE_DAIFMT_NB_NF |
SND_SOC_POSSIBLE_DAIFMT_NB_IF |
SND_SOC_POSSIBLE_DAIFMT_IB_NF |
SND_SOC_POSSIBLE_DAIFMT_IB_IF |
SND_SOC_POSSIBLE_DAIFMT_I2S |
SND_SOC_POSSIBLE_DAIFMT_DSP_A |
SND_SOC_POSSIBLE_DAIFMT_DSP_B |
SND_SOC_POSSIBLE_DAIFMT_RIGHT_J |
SND_SOC_POSSIBLE_DAIFMT_LEFT_J |
SND_SOC_POSSIBLE_DAIFMT_AC97;
#define HDMI_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)
#define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE)
/*
* This list is only for formats allowed on the I2S bus. So there is
* some formats listed that are not supported by HDMI interface. For
* instance allowing the 32-bit formats enables 24-precision with CPU
* DAIs that do not support 24-bit formats. If the extra formats cause
* problems, we should add the video side driver an option to disable
* them.
*/
#define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |\
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
static struct snd_kcontrol_new hdmi_codec_controls[] = {
{
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
.info = hdmi_codec_iec958_info,
.get = hdmi_codec_iec958_mask_get,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
.info = hdmi_codec_iec958_info,
.get = hdmi_codec_iec958_default_get,
.put = hdmi_codec_iec958_default_put,
},
{
.access = (SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_VOLATILE),
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "ELD",
.info = hdmi_eld_ctl_info,
.get = hdmi_eld_ctl_get,
},
};
static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_dai *dai)
{
struct snd_soc_dai_driver *drv = dai->driver;
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
unsigned int i;
int ret;
ret = snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
NULL, drv->playback.channels_max, 0,
&hcp->chmap_info);
if (ret < 0)
return ret;
/* override handlers */
hcp->chmap_info->private_data = hcp;
hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
/* default chmap supported is stereo */
hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
for (i = 0; i < ARRAY_SIZE(hdmi_codec_controls); i++) {
struct snd_kcontrol *kctl;
/* add ELD ctl with the device number corresponding to the PCM stream */
kctl = snd_ctl_new1(&hdmi_codec_controls[i], dai->component);
if (!kctl)
return -ENOMEM;
kctl->id.device = rtd->pcm->device;
ret = snd_ctl_add(rtd->card->snd_card, kctl);
if (ret < 0)
return ret;
}
return 0;
}
static int hdmi_dai_probe(struct snd_soc_dai *dai)
{
struct snd_soc_dapm_context *dapm;
struct hdmi_codec_daifmt *daifmt;
struct snd_soc_dapm_route route[] = {
{
.sink = "TX",
.source = dai->driver->playback.stream_name,
},
{
.sink = dai->driver->capture.stream_name,
.source = "RX",
},
};
int ret, i;
dapm = snd_soc_component_get_dapm(dai->component);
/* One of the directions might be omitted for unidirectional DAIs */
for (i = 0; i < ARRAY_SIZE(route); i++) {
if (!route[i].source || !route[i].sink)
continue;
ret = snd_soc_dapm_add_routes(dapm, &route[i], 1);
if (ret)
return ret;
}
daifmt = devm_kzalloc(dai->dev, sizeof(*daifmt), GFP_KERNEL);
if (!daifmt)
return -ENOMEM;
snd_soc_dai_dma_data_set_playback(dai, daifmt);
return 0;
}
static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
unsigned int jack_status)
{
if (jack_status != hcp->jack_status) {
if (hcp->jack)
snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_LINEOUT);
hcp->jack_status = jack_status;
}
}
static void plugged_cb(struct device *dev, bool plugged)
{
struct hdmi_codec_priv *hcp = dev_get_drvdata(dev);
if (plugged) {
if (hcp->hcd.ops->get_eld) {
hcp->hcd.ops->get_eld(dev->parent, hcp->hcd.data,
hcp->eld, sizeof(hcp->eld));
}
hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
} else {
hdmi_codec_jack_report(hcp, 0);
memset(hcp->eld, 0, sizeof(hcp->eld));
}
}
static int hdmi_codec_set_jack(struct snd_soc_component *component,
struct snd_soc_jack *jack,
void *data)
{
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
if (hcp->hcd.ops->hook_plugged_cb) {
hcp->jack = jack;
/*
* Report the initial jack status which may have been provided
* by the parent hdmi driver while the hpd hook was registered.
*/
snd_soc_jack_report(jack, hcp->jack_status, SND_JACK_LINEOUT);
return 0;
}
return -ENOTSUPP;
}
static int hdmi_dai_spdif_probe(struct snd_soc_dai *dai)
{
struct hdmi_codec_daifmt *cf;
int ret;
ret = hdmi_dai_probe(dai);
if (ret)
return ret;
cf = snd_soc_dai_dma_data_get_playback(dai);
cf->fmt = HDMI_SPDIF;
return 0;
}
static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
.probe = hdmi_dai_probe,
.startup = hdmi_codec_startup,
.shutdown = hdmi_codec_shutdown,
.hw_params = hdmi_codec_hw_params,
.prepare = hdmi_codec_prepare,
.set_fmt = hdmi_codec_i2s_set_fmt,
.mute_stream = hdmi_codec_mute,
.pcm_new = hdmi_codec_pcm_new,
.auto_selectable_formats = &hdmi_codec_formats,
.num_auto_selectable_formats = 1,
};
static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
.probe = hdmi_dai_spdif_probe,
.startup = hdmi_codec_startup,
.shutdown = hdmi_codec_shutdown,
.hw_params = hdmi_codec_hw_params,
.mute_stream = hdmi_codec_mute,
.pcm_new = hdmi_codec_pcm_new,
};
static const struct snd_soc_dai_driver hdmi_i2s_dai = {
.name = "i2s-hifi",
.id = DAI_ID_I2S,
.playback = {
.stream_name = "I2S Playback",
.channels_min = 2,
.channels_max = 8,
.rates = HDMI_RATES,
.formats = I2S_FORMATS,
.sig_bits = 24,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 8,
.rates = HDMI_RATES,
.formats = I2S_FORMATS,
.sig_bits = 24,
},
.ops = &hdmi_codec_i2s_dai_ops,
};
static const struct snd_soc_dai_driver hdmi_spdif_dai = {
.name = "spdif-hifi",
.id = DAI_ID_SPDIF,
.playback = {
.stream_name = "SPDIF Playback",
.channels_min = 2,
.channels_max = 2,
.rates = HDMI_RATES,
.formats = SPDIF_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = HDMI_RATES,
.formats = SPDIF_FORMATS,
},
.ops = &hdmi_codec_spdif_dai_ops,
};
static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
struct device_node *endpoint)
{
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
if (hcp->hcd.ops->get_dai_id)
ret = hcp->hcd.ops->get_dai_id(component, endpoint);
return ret;
}
static int hdmi_probe(struct snd_soc_component *component)
{
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
int ret = 0;
if (hcp->hcd.ops->hook_plugged_cb) {
ret = hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
hcp->hcd.data,
plugged_cb,
component->dev);
}
return ret;
}
static void hdmi_remove(struct snd_soc_component *component)
{
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
if (hcp->hcd.ops->hook_plugged_cb)
hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
hcp->hcd.data, NULL, NULL);
}
static const struct snd_soc_component_driver hdmi_driver = {
.probe = hdmi_probe,
.remove = hdmi_remove,
.dapm_widgets = hdmi_widgets,
.num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
.of_xlate_dai_id = hdmi_of_xlate_dai_id,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.set_jack = hdmi_codec_set_jack,
};
static int hdmi_codec_probe(struct platform_device *pdev)
{
struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
struct snd_soc_dai_driver *daidrv;
struct device *dev = &pdev->dev;
struct hdmi_codec_priv *hcp;
int dai_count, i = 0;
int ret;
if (!hcd) {
dev_err(dev, "%s: No platform data\n", __func__);
return -EINVAL;
}
dai_count = hcd->i2s + hcd->spdif;
if (dai_count < 1 || !hcd->ops ||
(!hcd->ops->hw_params && !hcd->ops->prepare) ||
!hcd->ops->audio_shutdown) {
dev_err(dev, "%s: Invalid parameters\n", __func__);
return -EINVAL;
}
hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
if (!hcp)
return -ENOMEM;
hcp->hcd = *hcd;
mutex_init(&hcp->lock);
ret = snd_pcm_create_iec958_consumer_default(hcp->iec_status,
sizeof(hcp->iec_status));
if (ret < 0)
return ret;
daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL);
if (!daidrv)
return -ENOMEM;
if (hcd->i2s) {
daidrv[i] = hdmi_i2s_dai;
daidrv[i].playback.channels_max = hcd->max_i2s_channels;
if (hcd->no_i2s_playback)
memset(&daidrv[i].playback, 0,
sizeof(daidrv[i].playback));
if (hcd->no_i2s_capture)
memset(&daidrv[i].capture, 0,
sizeof(daidrv[i].capture));
i++;
}
if (hcd->spdif) {
daidrv[i] = hdmi_spdif_dai;
if (hcd->no_spdif_playback)
memset(&daidrv[i].playback, 0,
sizeof(daidrv[i].playback));
if (hcd->no_spdif_capture)
memset(&daidrv[i].capture, 0,
sizeof(daidrv[i].capture));
}
dev_set_drvdata(dev, hcp);
ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv,
dai_count);
if (ret) {
dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
__func__, ret);
return ret;
}
return 0;
}
static struct platform_driver hdmi_codec_driver = {
.driver = {
.name = HDMI_CODEC_DRV_NAME,
},
.probe = hdmi_codec_probe,
};
module_platform_driver(hdmi_codec_driver);
MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
MODULE_DESCRIPTION("HDMI Audio Codec Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);
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