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linux/sound/soc/codecs/hdmi-codec.c
Mark Brown f77a066f4e
ASoC: hdmi-codec: Allow playback and capture to be disabled 
Currently the hdmi-codec driver always registers both playback and capture
capabilities but for most systems there's no actual capture capability,
usually HDMI is transmit only. Provide platform data which allows the users
to indicate what is supported so that we don't end up advertising things
to userspace that we can't actually support.

In order to avoid breaking existing users the flags in platform data are
a bit awkward and specify what should be disabled rather than doing the
perhaps more expected thing and defaulting to not supporting capture.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20221130184644.464820-2-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-12-02 14:07:12 +00:00

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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 that must match with hdmi_codec_8ch_chmaps struct
* 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},
/* 2.1 */
{ .ca_id = 0x01, .n_ch = 4,
.mask = FL | FR | LFE},
/* Dolby Surround */
{ .ca_id = 0x02, .n_ch = 4,
.mask = FL | FR | FC },
/* surround51 */
{ .ca_id = 0x0b, .n_ch = 6,
.mask = FL | FR | LFE | FC | RL | RR},
/* surround40 */
{ .ca_id = 0x08, .n_ch = 6,
.mask = FL | FR | RL | RR },
/* surround41 */
{ .ca_id = 0x09, .n_ch = 6,
.mask = FL | FR | LFE | RL | RR },
/* surround50 */
{ .ca_id = 0x0a, .n_ch = 6,
.mask = FL | FR | FC | RL | RR },
/* 6.1 */
{ .ca_id = 0x0f, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR | RC },
/* surround71 */
{ .ca_id = 0x13, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
/* others */
{ .ca_id = 0x03, .n_ch = 8,
.mask = FL | FR | LFE | FC },
{ .ca_id = 0x04, .n_ch = 8,
.mask = FL | FR | RC},
{ .ca_id = 0x05, .n_ch = 8,
.mask = FL | FR | LFE | RC },
{ .ca_id = 0x06, .n_ch = 8,
.mask = FL | FR | FC | RC },
{ .ca_id = 0x07, .n_ch = 8,
.mask = FL | FR | LFE | FC | RC },
{ .ca_id = 0x0c, .n_ch = 8,
.mask = FL | FR | RC | RL | RR },
{ .ca_id = 0x0d, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR | RC },
{ .ca_id = 0x0e, .n_ch = 8,
.mask = FL | FR | FC | RL | RR | RC },
{ .ca_id = 0x10, .n_ch = 8,
.mask = FL | FR | RL | RR | RLC | RRC },
{ .ca_id = 0x11, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR | RLC | RRC },
{ .ca_id = 0x12, .n_ch = 8,
.mask = FL | FR | FC | RL | RR | RLC | RRC },
{ .ca_id = 0x14, .n_ch = 8,
.mask = FL | FR | FLC | FRC },
{ .ca_id = 0x15, .n_ch = 8,
.mask = FL | FR | LFE | FLC | FRC },
{ .ca_id = 0x16, .n_ch = 8,
.mask = FL | FR | FC | FLC | FRC },
{ .ca_id = 0x17, .n_ch = 8,
.mask = FL | FR | LFE | FC | FLC | FRC },
{ .ca_id = 0x18, .n_ch = 8,
.mask = FL | FR | RC | FLC | FRC },
{ .ca_id = 0x19, .n_ch = 8,
.mask = FL | FR | LFE | RC | FLC | FRC },
{ .ca_id = 0x1a, .n_ch = 8,
.mask = FL | FR | RC | FC | FLC | FRC },
{ .ca_id = 0x1b, .n_ch = 8,
.mask = FL | FR | LFE | RC | FC | FLC | FRC },
{ .ca_id = 0x1c, .n_ch = 8,
.mask = FL | FR | RL | RR | FLC | FRC },
{ .ca_id = 0x1d, .n_ch = 8,
.mask = FL | FR | LFE | RL | RR | FLC | FRC },
{ .ca_id = 0x1e, .n_ch = 8,
.mask = FL | FR | FC | RL | RR | FLC | FRC },
{ .ca_id = 0x1f, .n_ch = 8,
.mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
};
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;
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;
int ret = 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);
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;
/* 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;
}
memset(hp, 0, sizeof(*hp));
hdmi_audio_infoframe_init(&hp->cea);
hp->cea.channels = channels;
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 = hdmi_codec_channel_alloc[idx].ca_id;
hp->sample_width = sample_width;
hp->sample_rate = sample_rate;
hp->channels = channels;
hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
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 = dai->playback_dma_data;
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 = dai->playback_dma_data;
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 = dai->playback_dma_data;
/* 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 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;
static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
.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,
.auto_selectable_formats = &hdmi_codec_formats,
.num_auto_selectable_formats = 1,
};
static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
.startup = hdmi_codec_startup,
.shutdown = hdmi_codec_shutdown,
.hw_params = hdmi_codec_hw_params,
.mute_stream = hdmi_codec_mute,
};
#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;
dai->playback_dma_data = daifmt;
return 0;
}
static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
unsigned int jack_status)
{
if (hcp->jack && jack_status != hcp->jack_status) {
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);
int ret = -ENOTSUPP;
if (hcp->hcd.ops->hook_plugged_cb) {
hcp->jack = jack;
ret = hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
hcp->hcd.data,
plugged_cb,
component->dev);
if (ret)
hcp->jack = NULL;
}
return ret;
}
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 = dai->playback_dma_data;
cf->fmt = HDMI_SPDIF;
return 0;
}
static const struct snd_soc_dai_driver hdmi_i2s_dai = {
.name = "i2s-hifi",
.id = DAI_ID_I2S,
.probe = hdmi_dai_probe,
.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,
.pcm_new = hdmi_codec_pcm_new,
};
static const struct snd_soc_dai_driver hdmi_spdif_dai = {
.name = "spdif-hifi",
.id = DAI_ID_SPDIF,
.probe = hdmi_dai_spdif_probe,
.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,
.pcm_new = hdmi_codec_pcm_new,
};
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 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 = {
.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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