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linux/sound/x86/intel_hdmi_audio.c
Leon Romanovsky 6417f03132 module: remove never implemented MODULE_SUPPORTED_DEVICE 
MODULE_SUPPORTED_DEVICE was added in pre-git era and never was
implemented. We can safely remove it, because the kernel has grown
to have many more reliable mechanisms to determine if device is
supported or not.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-03-17 13:16:18 -07:00

1890 lines
51 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* intel_hdmi_audio.c - Intel HDMI audio driver
*
* Copyright (C) 2016 Intel Corp
* Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
* Ramesh Babu K V <ramesh.babu@intel.com>
* Vaibhav Agarwal <vaibhav.agarwal@intel.com>
* Jerome Anand <jerome.anand@intel.com>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ALSA driver for Intel HDMI audio
*/
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/asoundef.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/control.h>
#include <sound/jack.h>
#include <drm/drm_edid.h>
#include <drm/intel_lpe_audio.h>
#include "intel_hdmi_audio.h"
#define for_each_pipe(card_ctx, pipe) \
for ((pipe) = 0; (pipe) < (card_ctx)->num_pipes; (pipe)++)
#define for_each_port(card_ctx, port) \
for ((port) = 0; (port) < (card_ctx)->num_ports; (port)++)
/*standard module options for ALSA. This module supports only one card*/
static int hdmi_card_index = SNDRV_DEFAULT_IDX1;
static char *hdmi_card_id = SNDRV_DEFAULT_STR1;
static bool single_port;
module_param_named(index, hdmi_card_index, int, 0444);
MODULE_PARM_DESC(index,
"Index value for INTEL Intel HDMI Audio controller.");
module_param_named(id, hdmi_card_id, charp, 0444);
MODULE_PARM_DESC(id,
"ID string for INTEL Intel HDMI Audio controller.");
module_param(single_port, bool, 0444);
MODULE_PARM_DESC(single_port,
"Single-port mode (for compatibility)");
/*
* ELD SA bits in the CEA Speaker Allocation data block
*/
static const int eld_speaker_allocation_bits[] = {
[0] = FL | FR,
[1] = LFE,
[2] = FC,
[3] = RL | RR,
[4] = RC,
[5] = FLC | FRC,
[6] = RLC | RRC,
/* the following are not defined in ELD yet */
[7] = 0,
};
/*
* This is an ordered list!
*
* The preceding ones have better chances to be selected by
* hdmi_channel_allocation().
*/
static struct cea_channel_speaker_allocation channel_allocations[] = {
/* channel: 7 6 5 4 3 2 1 0 */
{ .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } },
/* 2.1 */
{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } },
/* Dolby Surround */
{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } },
/* surround40 */
{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } },
/* surround41 */
{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } },
/* surround50 */
{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } },
/* surround51 */
{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
/* 6.1 */
{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } },
/* surround71 */
{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } },
{ .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } },
{ .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } },
{ .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } },
{ .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } },
{ .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } },
{ .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } },
{ .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } },
{ .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } },
{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } },
{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } },
{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } },
{ .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } },
{ .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } },
{ .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } },
{ .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } },
{ .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } },
{ .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } },
{ .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } },
{ .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } },
{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } },
{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } },
{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } },
{ .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } },
};
static const struct channel_map_table map_tables[] = {
{ SNDRV_CHMAP_FL, 0x00, FL },
{ SNDRV_CHMAP_FR, 0x01, FR },
{ SNDRV_CHMAP_RL, 0x04, RL },
{ SNDRV_CHMAP_RR, 0x05, RR },
{ SNDRV_CHMAP_LFE, 0x02, LFE },
{ SNDRV_CHMAP_FC, 0x03, FC },
{ SNDRV_CHMAP_RLC, 0x06, RLC },
{ SNDRV_CHMAP_RRC, 0x07, RRC },
{} /* terminator */
};
/* hardware capability structure */
static const struct snd_pcm_hardware had_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE),
.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,
.rate_min = HAD_MIN_RATE,
.rate_max = HAD_MAX_RATE,
.channels_min = HAD_MIN_CHANNEL,
.channels_max = HAD_MAX_CHANNEL,
.buffer_bytes_max = HAD_MAX_BUFFER,
.period_bytes_min = HAD_MIN_PERIOD_BYTES,
.period_bytes_max = HAD_MAX_PERIOD_BYTES,
.periods_min = HAD_MIN_PERIODS,
.periods_max = HAD_MAX_PERIODS,
.fifo_size = HAD_FIFO_SIZE,
};
/* Get the active PCM substream;
* Call had_substream_put() for unreferecing.
* Don't call this inside had_spinlock, as it takes by itself
*/
static struct snd_pcm_substream *
had_substream_get(struct snd_intelhad *intelhaddata)
{
struct snd_pcm_substream *substream;
unsigned long flags;
spin_lock_irqsave(&intelhaddata->had_spinlock, flags);
substream = intelhaddata->stream_info.substream;
if (substream)
intelhaddata->stream_info.substream_refcount++;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flags);
return substream;
}
/* Unref the active PCM substream;
* Don't call this inside had_spinlock, as it takes by itself
*/
static void had_substream_put(struct snd_intelhad *intelhaddata)
{
unsigned long flags;
spin_lock_irqsave(&intelhaddata->had_spinlock, flags);
intelhaddata->stream_info.substream_refcount--;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flags);
}
static u32 had_config_offset(int pipe)
{
switch (pipe) {
default:
case 0:
return AUDIO_HDMI_CONFIG_A;
case 1:
return AUDIO_HDMI_CONFIG_B;
case 2:
return AUDIO_HDMI_CONFIG_C;
}
}
/* Register access functions */
static u32 had_read_register_raw(struct snd_intelhad_card *card_ctx,
int pipe, u32 reg)
{
return ioread32(card_ctx->mmio_start + had_config_offset(pipe) + reg);
}
static void had_write_register_raw(struct snd_intelhad_card *card_ctx,
int pipe, u32 reg, u32 val)
{
iowrite32(val, card_ctx->mmio_start + had_config_offset(pipe) + reg);
}
static void had_read_register(struct snd_intelhad *ctx, u32 reg, u32 *val)
{
if (!ctx->connected)
*val = 0;
else
*val = had_read_register_raw(ctx->card_ctx, ctx->pipe, reg);
}
static void had_write_register(struct snd_intelhad *ctx, u32 reg, u32 val)
{
if (ctx->connected)
had_write_register_raw(ctx->card_ctx, ctx->pipe, reg, val);
}
/*
* enable / disable audio configuration
*
* The normal read/modify should not directly be used on VLV2 for
* updating AUD_CONFIG register.
* This is because:
* Bit6 of AUD_CONFIG register is writeonly due to a silicon bug on VLV2
* HDMI IP. As a result a read-modify of AUD_CONFIG regiter will always
* clear bit6. AUD_CONFIG[6:4] represents the "channels" field of the
* register. This field should be 1xy binary for configuration with 6 or
* more channels. Read-modify of AUD_CONFIG (Eg. for enabling audio)
* causes the "channels" field to be updated as 0xy binary resulting in
* bad audio. The fix is to always write the AUD_CONFIG[6:4] with
* appropriate value when doing read-modify of AUD_CONFIG register.
*/
static void had_enable_audio(struct snd_intelhad *intelhaddata,
bool enable)
{
/* update the cached value */
intelhaddata->aud_config.regx.aud_en = enable;
had_write_register(intelhaddata, AUD_CONFIG,
intelhaddata->aud_config.regval);
}
/* forcibly ACKs to both BUFFER_DONE and BUFFER_UNDERRUN interrupts */
static void had_ack_irqs(struct snd_intelhad *ctx)
{
u32 status_reg;
if (!ctx->connected)
return;
had_read_register(ctx, AUD_HDMI_STATUS, &status_reg);
status_reg |= HDMI_AUDIO_BUFFER_DONE | HDMI_AUDIO_UNDERRUN;
had_write_register(ctx, AUD_HDMI_STATUS, status_reg);
had_read_register(ctx, AUD_HDMI_STATUS, &status_reg);
}
/* Reset buffer pointers */
static void had_reset_audio(struct snd_intelhad *intelhaddata)
{
had_write_register(intelhaddata, AUD_HDMI_STATUS,
AUD_HDMI_STATUSG_MASK_FUNCRST);
had_write_register(intelhaddata, AUD_HDMI_STATUS, 0);
}
/*
* initialize audio channel status registers
* This function is called in the prepare callback
*/
static int had_prog_status_reg(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
union aud_ch_status_0 ch_stat0 = {.regval = 0};
union aud_ch_status_1 ch_stat1 = {.regval = 0};
ch_stat0.regx.lpcm_id = (intelhaddata->aes_bits &
IEC958_AES0_NONAUDIO) >> 1;
ch_stat0.regx.clk_acc = (intelhaddata->aes_bits &
IEC958_AES3_CON_CLOCK) >> 4;
switch (substream->runtime->rate) {
case AUD_SAMPLE_RATE_32:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_32KHZ;
break;
case AUD_SAMPLE_RATE_44_1:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_44KHZ;
break;
case AUD_SAMPLE_RATE_48:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_48KHZ;
break;
case AUD_SAMPLE_RATE_88_2:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_88KHZ;
break;
case AUD_SAMPLE_RATE_96:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_96KHZ;
break;
case AUD_SAMPLE_RATE_176_4:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_176KHZ;
break;
case AUD_SAMPLE_RATE_192:
ch_stat0.regx.samp_freq = CH_STATUS_MAP_192KHZ;
break;
default:
/* control should never come here */
return -EINVAL;
}
had_write_register(intelhaddata,
AUD_CH_STATUS_0, ch_stat0.regval);
switch (substream->runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_20;
ch_stat1.regx.wrd_len = SMPL_WIDTH_16BITS;
break;
case SNDRV_PCM_FORMAT_S24_LE:
case SNDRV_PCM_FORMAT_S32_LE:
ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_24;
ch_stat1.regx.wrd_len = SMPL_WIDTH_24BITS;
break;
default:
return -EINVAL;
}
had_write_register(intelhaddata,
AUD_CH_STATUS_1, ch_stat1.regval);
return 0;
}
/*
* function to initialize audio
* registers and buffer confgiuration registers
* This function is called in the prepare callback
*/
static int had_init_audio_ctrl(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
union aud_cfg cfg_val = {.regval = 0};
union aud_buf_config buf_cfg = {.regval = 0};
u8 channels;
had_prog_status_reg(substream, intelhaddata);
buf_cfg.regx.audio_fifo_watermark = FIFO_THRESHOLD;
buf_cfg.regx.dma_fifo_watermark = DMA_FIFO_THRESHOLD;
buf_cfg.regx.aud_delay = 0;
had_write_register(intelhaddata, AUD_BUF_CONFIG, buf_cfg.regval);
channels = substream->runtime->channels;
cfg_val.regx.num_ch = channels - 2;
if (channels <= 2)
cfg_val.regx.layout = LAYOUT0;
else
cfg_val.regx.layout = LAYOUT1;
if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
cfg_val.regx.packet_mode = 1;
if (substream->runtime->format == SNDRV_PCM_FORMAT_S32_LE)
cfg_val.regx.left_align = 1;
cfg_val.regx.val_bit = 1;
/* fix up the DP bits */
if (intelhaddata->dp_output) {
cfg_val.regx.dp_modei = 1;
cfg_val.regx.set = 1;
}
had_write_register(intelhaddata, AUD_CONFIG, cfg_val.regval);
intelhaddata->aud_config = cfg_val;
return 0;
}
/*
* Compute derived values in channel_allocations[].
*/
static void init_channel_allocations(void)
{
int i, j;
struct cea_channel_speaker_allocation *p;
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
p = channel_allocations + i;
p->channels = 0;
p->spk_mask = 0;
for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
if (p->speakers[j]) {
p->channels++;
p->spk_mask |= p->speakers[j];
}
}
}
/*
* The transformation takes two steps:
*
* eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
* spk_mask => (channel_allocations[]) => ai->CA
*
* TODO: it could select the wrong CA from multiple candidates.
*/
static int had_channel_allocation(struct snd_intelhad *intelhaddata,
int channels)
{
int i;
int ca = 0;
int spk_mask = 0;
/*
* CA defaults to 0 for basic stereo audio
*/
if (channels <= 2)
return 0;
/*
* expand ELD's speaker allocation mask
*
* ELD tells the speaker mask in a compact(paired) form,
* expand ELD's notions to match the ones used by Audio InfoFrame.
*/
for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
if (intelhaddata->eld[DRM_ELD_SPEAKER] & (1 << i))
spk_mask |= eld_speaker_allocation_bits[i];
}
/* search for the first working match in the CA table */
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
if (channels == channel_allocations[i].channels &&
(spk_mask & channel_allocations[i].spk_mask) ==
channel_allocations[i].spk_mask) {
ca = channel_allocations[i].ca_index;
break;
}
}
dev_dbg(intelhaddata->dev, "select CA 0x%x for %d\n", ca, channels);
return ca;
}
/* from speaker bit mask to ALSA API channel position */
static int spk_to_chmap(int spk)
{
const struct channel_map_table *t = map_tables;
for (; t->map; t++) {
if (t->spk_mask == spk)
return t->map;
}
return 0;
}
static void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata)
{
int i, c;
int spk_mask = 0;
struct snd_pcm_chmap_elem *chmap;
u8 eld_high, eld_high_mask = 0xF0;
u8 high_msb;
kfree(intelhaddata->chmap->chmap);
intelhaddata->chmap->chmap = NULL;
chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
if (!chmap)
return;
dev_dbg(intelhaddata->dev, "eld speaker = %x\n",
intelhaddata->eld[DRM_ELD_SPEAKER]);
/* WA: Fix the max channel supported to 8 */
/*
* Sink may support more than 8 channels, if eld_high has more than
* one bit set. SOC supports max 8 channels.
* Refer eld_speaker_allocation_bits, for sink speaker allocation
*/
/* if 0x2F < eld < 0x4F fall back to 0x2f, else fall back to 0x4F */
eld_high = intelhaddata->eld[DRM_ELD_SPEAKER] & eld_high_mask;
if ((eld_high & (eld_high-1)) && (eld_high > 0x1F)) {
/* eld_high & (eld_high-1): if more than 1 bit set */
/* 0x1F: 7 channels */
for (i = 1; i < 4; i++) {
high_msb = eld_high & (0x80 >> i);
if (high_msb) {
intelhaddata->eld[DRM_ELD_SPEAKER] &=
high_msb | 0xF;
break;
}
}
}
for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
if (intelhaddata->eld[DRM_ELD_SPEAKER] & (1 << i))
spk_mask |= eld_speaker_allocation_bits[i];
}
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
if (spk_mask == channel_allocations[i].spk_mask) {
for (c = 0; c < channel_allocations[i].channels; c++) {
chmap->map[c] = spk_to_chmap(
channel_allocations[i].speakers[
(MAX_SPEAKERS - 1) - c]);
}
chmap->channels = channel_allocations[i].channels;
intelhaddata->chmap->chmap = chmap;
break;
}
}
if (i >= ARRAY_SIZE(channel_allocations))
kfree(chmap);
}
/*
* ALSA API channel-map control callbacks
*/
static int had_chmap_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = HAD_MAX_CHANNEL;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = SNDRV_CHMAP_LAST;
return 0;
}
static int had_chmap_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct snd_intelhad *intelhaddata = info->private_data;
int i;
const struct snd_pcm_chmap_elem *chmap;
memset(ucontrol->value.integer.value, 0,
sizeof(long) * HAD_MAX_CHANNEL);
mutex_lock(&intelhaddata->mutex);
if (!intelhaddata->chmap->chmap) {
mutex_unlock(&intelhaddata->mutex);
return 0;
}
chmap = intelhaddata->chmap->chmap;
for (i = 0; i < chmap->channels; i++)
ucontrol->value.integer.value[i] = chmap->map[i];
mutex_unlock(&intelhaddata->mutex);
return 0;
}
static int had_register_chmap_ctls(struct snd_intelhad *intelhaddata,
struct snd_pcm *pcm)
{
int err;
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
NULL, 0, (unsigned long)intelhaddata,
&intelhaddata->chmap);
if (err < 0)
return err;
intelhaddata->chmap->private_data = intelhaddata;
intelhaddata->chmap->kctl->info = had_chmap_ctl_info;
intelhaddata->chmap->kctl->get = had_chmap_ctl_get;
intelhaddata->chmap->chmap = NULL;
return 0;
}
/*
* Initialize Data Island Packets registers
* This function is called in the prepare callback
*/
static void had_prog_dip(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
int i;
union aud_ctrl_st ctrl_state = {.regval = 0};
union aud_info_frame2 frame2 = {.regval = 0};
union aud_info_frame3 frame3 = {.regval = 0};
u8 checksum = 0;
u32 info_frame;
int channels;
int ca;
channels = substream->runtime->channels;
had_write_register(intelhaddata, AUD_CNTL_ST, ctrl_state.regval);
ca = had_channel_allocation(intelhaddata, channels);
if (intelhaddata->dp_output) {
info_frame = DP_INFO_FRAME_WORD1;
frame2.regval = (substream->runtime->channels - 1) | (ca << 24);
} else {
info_frame = HDMI_INFO_FRAME_WORD1;
frame2.regx.chnl_cnt = substream->runtime->channels - 1;
frame3.regx.chnl_alloc = ca;
/* Calculte the byte wide checksum for all valid DIP words */
for (i = 0; i < BYTES_PER_WORD; i++)
checksum += (info_frame >> (i * 8)) & 0xff;
for (i = 0; i < BYTES_PER_WORD; i++)
checksum += (frame2.regval >> (i * 8)) & 0xff;
for (i = 0; i < BYTES_PER_WORD; i++)
checksum += (frame3.regval >> (i * 8)) & 0xff;
frame2.regx.chksum = -(checksum);
}
had_write_register(intelhaddata, AUD_HDMIW_INFOFR, info_frame);
had_write_register(intelhaddata, AUD_HDMIW_INFOFR, frame2.regval);
had_write_register(intelhaddata, AUD_HDMIW_INFOFR, frame3.regval);
/* program remaining DIP words with zero */
for (i = 0; i < HAD_MAX_DIP_WORDS-VALID_DIP_WORDS; i++)
had_write_register(intelhaddata, AUD_HDMIW_INFOFR, 0x0);
ctrl_state.regx.dip_freq = 1;
ctrl_state.regx.dip_en_sta = 1;
had_write_register(intelhaddata, AUD_CNTL_ST, ctrl_state.regval);
}
static int had_calculate_maud_value(u32 aud_samp_freq, u32 link_rate)
{
u32 maud_val;
/* Select maud according to DP 1.2 spec */
if (link_rate == DP_2_7_GHZ) {
switch (aud_samp_freq) {
case AUD_SAMPLE_RATE_32:
maud_val = AUD_SAMPLE_RATE_32_DP_2_7_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_44_1:
maud_val = AUD_SAMPLE_RATE_44_1_DP_2_7_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_48:
maud_val = AUD_SAMPLE_RATE_48_DP_2_7_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_88_2:
maud_val = AUD_SAMPLE_RATE_88_2_DP_2_7_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_96:
maud_val = AUD_SAMPLE_RATE_96_DP_2_7_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_176_4:
maud_val = AUD_SAMPLE_RATE_176_4_DP_2_7_MAUD_VAL;
break;
case HAD_MAX_RATE:
maud_val = HAD_MAX_RATE_DP_2_7_MAUD_VAL;
break;
default:
maud_val = -EINVAL;
break;
}
} else if (link_rate == DP_1_62_GHZ) {
switch (aud_samp_freq) {
case AUD_SAMPLE_RATE_32:
maud_val = AUD_SAMPLE_RATE_32_DP_1_62_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_44_1:
maud_val = AUD_SAMPLE_RATE_44_1_DP_1_62_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_48:
maud_val = AUD_SAMPLE_RATE_48_DP_1_62_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_88_2:
maud_val = AUD_SAMPLE_RATE_88_2_DP_1_62_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_96:
maud_val = AUD_SAMPLE_RATE_96_DP_1_62_MAUD_VAL;
break;
case AUD_SAMPLE_RATE_176_4:
maud_val = AUD_SAMPLE_RATE_176_4_DP_1_62_MAUD_VAL;
break;
case HAD_MAX_RATE:
maud_val = HAD_MAX_RATE_DP_1_62_MAUD_VAL;
break;
default:
maud_val = -EINVAL;
break;
}
} else
maud_val = -EINVAL;
return maud_val;
}
/*
* Program HDMI audio CTS value
*
* @aud_samp_freq: sampling frequency of audio data
* @tmds: sampling frequency of the display data
* @link_rate: DP link rate
* @n_param: N value, depends on aud_samp_freq
* @intelhaddata: substream private data
*
* Program CTS register based on the audio and display sampling frequency
*/
static void had_prog_cts(u32 aud_samp_freq, u32 tmds, u32 link_rate,
u32 n_param, struct snd_intelhad *intelhaddata)
{
u32 cts_val;
u64 dividend, divisor;
if (intelhaddata->dp_output) {
/* Substitute cts_val with Maud according to DP 1.2 spec*/
cts_val = had_calculate_maud_value(aud_samp_freq, link_rate);
} else {
/* Calculate CTS according to HDMI 1.3a spec*/
dividend = (u64)tmds * n_param*1000;
divisor = 128 * aud_samp_freq;
cts_val = div64_u64(dividend, divisor);
}
dev_dbg(intelhaddata->dev, "TMDS value=%d, N value=%d, CTS Value=%d\n",
tmds, n_param, cts_val);
had_write_register(intelhaddata, AUD_HDMI_CTS, (BIT(24) | cts_val));
}
static int had_calculate_n_value(u32 aud_samp_freq)
{
int n_val;
/* Select N according to HDMI 1.3a spec*/
switch (aud_samp_freq) {
case AUD_SAMPLE_RATE_32:
n_val = 4096;
break;
case AUD_SAMPLE_RATE_44_1:
n_val = 6272;
break;
case AUD_SAMPLE_RATE_48:
n_val = 6144;
break;
case AUD_SAMPLE_RATE_88_2:
n_val = 12544;
break;
case AUD_SAMPLE_RATE_96:
n_val = 12288;
break;
case AUD_SAMPLE_RATE_176_4:
n_val = 25088;
break;
case HAD_MAX_RATE:
n_val = 24576;
break;
default:
n_val = -EINVAL;
break;
}
return n_val;
}
/*
* Program HDMI audio N value
*
* @aud_samp_freq: sampling frequency of audio data
* @n_param: N value, depends on aud_samp_freq
* @intelhaddata: substream private data
*
* This function is called in the prepare callback.
* It programs based on the audio and display sampling frequency
*/
static int had_prog_n(u32 aud_samp_freq, u32 *n_param,
struct snd_intelhad *intelhaddata)
{
int n_val;
if (intelhaddata->dp_output) {
/*
* According to DP specs, Maud and Naud values hold
* a relationship, which is stated as:
* Maud/Naud = 512 * fs / f_LS_Clk
* where, fs is the sampling frequency of the audio stream
* and Naud is 32768 for Async clock.
*/
n_val = DP_NAUD_VAL;
} else
n_val = had_calculate_n_value(aud_samp_freq);
if (n_val < 0)
return n_val;
had_write_register(intelhaddata, AUD_N_ENABLE, (BIT(24) | n_val));
*n_param = n_val;
return 0;
}
/*
* PCM ring buffer handling
*
* The hardware provides a ring buffer with the fixed 4 buffer descriptors
* (BDs). The driver maps these 4 BDs onto the PCM ring buffer. The mapping
* moves at each period elapsed. The below illustrates how it works:
*
* At time=0
* PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
* BD | 0 | 1 | 2 | 3 |
*
* At time=1 (period elapsed)
* PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
* BD | 1 | 2 | 3 | 0 |
*
* At time=2 (second period elapsed)
* PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
* BD | 2 | 3 | 0 | 1 |
*
* The bd_head field points to the index of the BD to be read. It's also the
* position to be filled at next. The pcm_head and the pcm_filled fields
* point to the indices of the current position and of the next position to
* be filled, respectively. For PCM buffer there are both _head and _filled
* because they may be difference when nperiods > 4. For example, in the
* example above at t=1, bd_head=1 and pcm_head=1 while pcm_filled=5:
*
* pcm_head (=1) --v v-- pcm_filled (=5)
* PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1|
* BD | 1 | 2 | 3 | 0 |
* bd_head (=1) --^ ^-- next to fill (= bd_head)
*
* For nperiods < 4, the remaining BDs out of 4 are marked as invalid, so that
* the hardware skips those BDs in the loop.
*
* An exceptional setup is the case with nperiods=1. Since we have to update
* BDs after finishing one BD processing, we'd need at least two BDs, where
* both BDs point to the same content, the same address, the same size of the
* whole PCM buffer.
*/
#define AUD_BUF_ADDR(x) (AUD_BUF_A_ADDR + (x) * HAD_REG_WIDTH)
#define AUD_BUF_LEN(x) (AUD_BUF_A_LENGTH + (x) * HAD_REG_WIDTH)
/* Set up a buffer descriptor at the "filled" position */
static void had_prog_bd(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
int idx = intelhaddata->bd_head;
int ofs = intelhaddata->pcmbuf_filled * intelhaddata->period_bytes;
u32 addr = substream->runtime->dma_addr + ofs;
addr |= AUD_BUF_VALID;
if (!substream->runtime->no_period_wakeup)
addr |= AUD_BUF_INTR_EN;
had_write_register(intelhaddata, AUD_BUF_ADDR(idx), addr);
had_write_register(intelhaddata, AUD_BUF_LEN(idx),
intelhaddata->period_bytes);
/* advance the indices to the next */
intelhaddata->bd_head++;
intelhaddata->bd_head %= intelhaddata->num_bds;
intelhaddata->pcmbuf_filled++;
intelhaddata->pcmbuf_filled %= substream->runtime->periods;
}
/* invalidate a buffer descriptor with the given index */
static void had_invalidate_bd(struct snd_intelhad *intelhaddata,
int idx)
{
had_write_register(intelhaddata, AUD_BUF_ADDR(idx), 0);
had_write_register(intelhaddata, AUD_BUF_LEN(idx), 0);
}
/* Initial programming of ring buffer */
static void had_init_ringbuf(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int i, num_periods;
num_periods = runtime->periods;
intelhaddata->num_bds = min(num_periods, HAD_NUM_OF_RING_BUFS);
/* set the minimum 2 BDs for num_periods=1 */
intelhaddata->num_bds = max(intelhaddata->num_bds, 2U);
intelhaddata->period_bytes =
frames_to_bytes(runtime, runtime->period_size);
WARN_ON(intelhaddata->period_bytes & 0x3f);
intelhaddata->bd_head = 0;
intelhaddata->pcmbuf_head = 0;
intelhaddata->pcmbuf_filled = 0;
for (i = 0; i < HAD_NUM_OF_RING_BUFS; i++) {
if (i < intelhaddata->num_bds)
had_prog_bd(substream, intelhaddata);
else /* invalidate the rest */
had_invalidate_bd(intelhaddata, i);
}
intelhaddata->bd_head = 0; /* reset at head again before starting */
}
/* process a bd, advance to the next */
static void had_advance_ringbuf(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
int num_periods = substream->runtime->periods;
/* reprogram the next buffer */
had_prog_bd(substream, intelhaddata);
/* proceed to next */
intelhaddata->pcmbuf_head++;
intelhaddata->pcmbuf_head %= num_periods;
}
/* process the current BD(s);
* returns the current PCM buffer byte position, or -EPIPE for underrun.
*/
static int had_process_ringbuf(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata)
{
int len, processed;
unsigned long flags;
processed = 0;
spin_lock_irqsave(&intelhaddata->had_spinlock, flags);
for (;;) {
/* get the remaining bytes on the buffer */
had_read_register(intelhaddata,
AUD_BUF_LEN(intelhaddata->bd_head),
&len);
if (len < 0 || len > intelhaddata->period_bytes) {
dev_dbg(intelhaddata->dev, "Invalid buf length %d\n",
len);
len = -EPIPE;
goto out;
}
if (len > 0) /* OK, this is the current buffer */
break;
/* len=0 => already empty, check the next buffer */
if (++processed >= intelhaddata->num_bds) {
len = -EPIPE; /* all empty? - report underrun */
goto out;
}
had_advance_ringbuf(substream, intelhaddata);
}
len = intelhaddata->period_bytes - len;
len += intelhaddata->period_bytes * intelhaddata->pcmbuf_head;
out:
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flags);
return len;
}
/* called from irq handler */
static void had_process_buffer_done(struct snd_intelhad *intelhaddata)
{
struct snd_pcm_substream *substream;
substream = had_substream_get(intelhaddata);
if (!substream)
return; /* no stream? - bail out */
if (!intelhaddata->connected) {
snd_pcm_stop_xrun(substream);
goto out; /* disconnected? - bail out */
}
/* process or stop the stream */
if (had_process_ringbuf(substream, intelhaddata) < 0)
snd_pcm_stop_xrun(substream);
else
snd_pcm_period_elapsed(substream);
out:
had_substream_put(intelhaddata);
}
/*
* The interrupt status 'sticky' bits might not be cleared by
* setting '1' to that bit once...
*/
static void wait_clear_underrun_bit(struct snd_intelhad *intelhaddata)
{
int i;
u32 val;
for (i = 0; i < 100; i++) {
/* clear bit30, 31 AUD_HDMI_STATUS */
had_read_register(intelhaddata, AUD_HDMI_STATUS, &val);
if (!(val & AUD_HDMI_STATUS_MASK_UNDERRUN))
return;
udelay(100);
cond_resched();
had_write_register(intelhaddata, AUD_HDMI_STATUS, val);
}
dev_err(intelhaddata->dev, "Unable to clear UNDERRUN bits\n");
}
/* Perform some reset procedure but only when need_reset is set;
* this is called from prepare or hw_free callbacks once after trigger STOP
* or underrun has been processed in order to settle down the h/w state.
*/
static void had_do_reset(struct snd_intelhad *intelhaddata)
{
if (!intelhaddata->need_reset || !intelhaddata->connected)
return;
/* Reset buffer pointers */
had_reset_audio(intelhaddata);
wait_clear_underrun_bit(intelhaddata);
intelhaddata->need_reset = false;
}
/* called from irq handler */
static void had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
{
struct snd_pcm_substream *substream;
/* Report UNDERRUN error to above layers */
substream = had_substream_get(intelhaddata);
if (substream) {
snd_pcm_stop_xrun(substream);
had_substream_put(intelhaddata);
}
intelhaddata->need_reset = true;
}
/*
* ALSA PCM open callback
*/
static int had_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_intelhad *intelhaddata;
struct snd_pcm_runtime *runtime;
int retval;
intelhaddata = snd_pcm_substream_chip(substream);
runtime = substream->runtime;
pm_runtime_get_sync(intelhaddata->dev);
/* set the runtime hw parameter with local snd_pcm_hardware struct */
runtime->hw = had_pcm_hardware;
retval = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (retval < 0)
goto error;
/* Make sure, that the period size is always aligned
* 64byte boundary
*/
retval = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
if (retval < 0)
goto error;
retval = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
if (retval < 0)
goto error;
/* expose PCM substream */
spin_lock_irq(&intelhaddata->had_spinlock);
intelhaddata->stream_info.substream = substream;
intelhaddata->stream_info.substream_refcount++;
spin_unlock_irq(&intelhaddata->had_spinlock);
return retval;
error:
pm_runtime_mark_last_busy(intelhaddata->dev);
pm_runtime_put_autosuspend(intelhaddata->dev);
return retval;
}
/*
* ALSA PCM close callback
*/
static int had_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_intelhad *intelhaddata;
intelhaddata = snd_pcm_substream_chip(substream);
/* unreference and sync with the pending PCM accesses */
spin_lock_irq(&intelhaddata->had_spinlock);
intelhaddata->stream_info.substream = NULL;
intelhaddata->stream_info.substream_refcount--;
while (intelhaddata->stream_info.substream_refcount > 0) {
spin_unlock_irq(&intelhaddata->had_spinlock);
cpu_relax();
spin_lock_irq(&intelhaddata->had_spinlock);
}
spin_unlock_irq(&intelhaddata->had_spinlock);
pm_runtime_mark_last_busy(intelhaddata->dev);
pm_runtime_put_autosuspend(intelhaddata->dev);
return 0;
}
/*
* ALSA PCM hw_params callback
*/
static int had_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_intelhad *intelhaddata;
int buf_size;
intelhaddata = snd_pcm_substream_chip(substream);
buf_size = params_buffer_bytes(hw_params);
dev_dbg(intelhaddata->dev, "%s:allocated memory = %d\n",
__func__, buf_size);
return 0;
}
/*
* ALSA PCM hw_free callback
*/
static int had_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_intelhad *intelhaddata;
intelhaddata = snd_pcm_substream_chip(substream);
had_do_reset(intelhaddata);
return 0;
}
/*
* ALSA PCM trigger callback
*/
static int had_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
int retval = 0;
struct snd_intelhad *intelhaddata;
intelhaddata = snd_pcm_substream_chip(substream);
spin_lock(&intelhaddata->had_spinlock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
/* Enable Audio */
had_ack_irqs(intelhaddata); /* FIXME: do we need this? */
had_enable_audio(intelhaddata, true);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
/* Disable Audio */
had_enable_audio(intelhaddata, false);
intelhaddata->need_reset = true;
break;
default:
retval = -EINVAL;
}
spin_unlock(&intelhaddata->had_spinlock);
return retval;
}
/*
* ALSA PCM prepare callback
*/
static int had_pcm_prepare(struct snd_pcm_substream *substream)
{
int retval;
u32 disp_samp_freq, n_param;
u32 link_rate = 0;
struct snd_intelhad *intelhaddata;
struct snd_pcm_runtime *runtime;
intelhaddata = snd_pcm_substream_chip(substream);
runtime = substream->runtime;
dev_dbg(intelhaddata->dev, "period_size=%d\n",
(int)frames_to_bytes(runtime, runtime->period_size));
dev_dbg(intelhaddata->dev, "periods=%d\n", runtime->periods);
dev_dbg(intelhaddata->dev, "buffer_size=%d\n",
(int)snd_pcm_lib_buffer_bytes(substream));
dev_dbg(intelhaddata->dev, "rate=%d\n", runtime->rate);
dev_dbg(intelhaddata->dev, "channels=%d\n", runtime->channels);
had_do_reset(intelhaddata);
/* Get N value in KHz */
disp_samp_freq = intelhaddata->tmds_clock_speed;
retval = had_prog_n(substream->runtime->rate, &n_param, intelhaddata);
if (retval) {
dev_err(intelhaddata->dev,
"programming N value failed %#x\n", retval);
goto prep_end;
}
if (intelhaddata->dp_output)
link_rate = intelhaddata->link_rate;
had_prog_cts(substream->runtime->rate, disp_samp_freq, link_rate,
n_param, intelhaddata);
had_prog_dip(substream, intelhaddata);
retval = had_init_audio_ctrl(substream, intelhaddata);
/* Prog buffer address */
had_init_ringbuf(substream, intelhaddata);
/*
* Program channel mapping in following order:
* FL, FR, C, LFE, RL, RR
*/
had_write_register(intelhaddata, AUD_BUF_CH_SWAP, SWAP_LFE_CENTER);
prep_end:
return retval;
}
/*
* ALSA PCM pointer callback
*/
static snd_pcm_uframes_t had_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_intelhad *intelhaddata;
int len;
intelhaddata = snd_pcm_substream_chip(substream);
if (!intelhaddata->connected)
return SNDRV_PCM_POS_XRUN;
len = had_process_ringbuf(substream, intelhaddata);
if (len < 0)
return SNDRV_PCM_POS_XRUN;
len = bytes_to_frames(substream->runtime, len);
/* wrapping may happen when periods=1 */
len %= substream->runtime->buffer_size;
return len;
}
/*
* ALSA PCM mmap callback
*/
static int had_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return remap_pfn_range(vma, vma->vm_start,
substream->dma_buffer.addr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
}
/*
* ALSA PCM ops
*/
static const struct snd_pcm_ops had_pcm_ops = {
.open = had_pcm_open,
.close = had_pcm_close,
.hw_params = had_pcm_hw_params,
.hw_free = had_pcm_hw_free,
.prepare = had_pcm_prepare,
.trigger = had_pcm_trigger,
.pointer = had_pcm_pointer,
.mmap = had_pcm_mmap,
};
/* process mode change of the running stream; called in mutex */
static int had_process_mode_change(struct snd_intelhad *intelhaddata)
{
struct snd_pcm_substream *substream;
int retval = 0;
u32 disp_samp_freq, n_param;
u32 link_rate = 0;
substream = had_substream_get(intelhaddata);
if (!substream)
return 0;
/* Disable Audio */
had_enable_audio(intelhaddata, false);
/* Update CTS value */
disp_samp_freq = intelhaddata->tmds_clock_speed;
retval = had_prog_n(substream->runtime->rate, &n_param, intelhaddata);
if (retval) {
dev_err(intelhaddata->dev,
"programming N value failed %#x\n", retval);
goto out;
}
if (intelhaddata->dp_output)
link_rate = intelhaddata->link_rate;
had_prog_cts(substream->runtime->rate, disp_samp_freq, link_rate,
n_param, intelhaddata);
/* Enable Audio */
had_enable_audio(intelhaddata, true);
out:
had_substream_put(intelhaddata);
return retval;
}
/* process hot plug, called from wq with mutex locked */
static void had_process_hot_plug(struct snd_intelhad *intelhaddata)
{
struct snd_pcm_substream *substream;
spin_lock_irq(&intelhaddata->had_spinlock);
if (intelhaddata->connected) {
dev_dbg(intelhaddata->dev, "Device already connected\n");
spin_unlock_irq(&intelhaddata->had_spinlock);
return;
}
/* Disable Audio */
had_enable_audio(intelhaddata, false);
intelhaddata->connected = true;
dev_dbg(intelhaddata->dev,
"%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_CONNECTED\n",
__func__, __LINE__);
spin_unlock_irq(&intelhaddata->had_spinlock);
had_build_channel_allocation_map(intelhaddata);
/* Report to above ALSA layer */
substream = had_substream_get(intelhaddata);
if (substream) {
snd_pcm_stop_xrun(substream);
had_substream_put(intelhaddata);
}
snd_jack_report(intelhaddata->jack, SND_JACK_AVOUT);
}
/* process hot unplug, called from wq with mutex locked */
static void had_process_hot_unplug(struct snd_intelhad *intelhaddata)
{
struct snd_pcm_substream *substream;
spin_lock_irq(&intelhaddata->had_spinlock);
if (!intelhaddata->connected) {
dev_dbg(intelhaddata->dev, "Device already disconnected\n");
spin_unlock_irq(&intelhaddata->had_spinlock);
return;
}
/* Disable Audio */
had_enable_audio(intelhaddata, false);
intelhaddata->connected = false;
dev_dbg(intelhaddata->dev,
"%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n",
__func__, __LINE__);
spin_unlock_irq(&intelhaddata->had_spinlock);
kfree(intelhaddata->chmap->chmap);
intelhaddata->chmap->chmap = NULL;
/* Report to above ALSA layer */
substream = had_substream_get(intelhaddata);
if (substream) {
snd_pcm_stop_xrun(substream);
had_substream_put(intelhaddata);
}
snd_jack_report(intelhaddata->jack, 0);
}
/*
* ALSA iec958 and ELD controls
*/
static int had_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 had_iec958_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol);
mutex_lock(&intelhaddata->mutex);
ucontrol->value.iec958.status[0] = (intelhaddata->aes_bits >> 0) & 0xff;
ucontrol->value.iec958.status[1] = (intelhaddata->aes_bits >> 8) & 0xff;
ucontrol->value.iec958.status[2] =
(intelhaddata->aes_bits >> 16) & 0xff;
ucontrol->value.iec958.status[3] =
(intelhaddata->aes_bits >> 24) & 0xff;
mutex_unlock(&intelhaddata->mutex);
return 0;
}
static int had_iec958_mask_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.iec958.status[0] = 0xff;
ucontrol->value.iec958.status[1] = 0xff;
ucontrol->value.iec958.status[2] = 0xff;
ucontrol->value.iec958.status[3] = 0xff;
return 0;
}
static int had_iec958_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
unsigned int val;
struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol);
int changed = 0;
val = (ucontrol->value.iec958.status[0] << 0) |
(ucontrol->value.iec958.status[1] << 8) |
(ucontrol->value.iec958.status[2] << 16) |
(ucontrol->value.iec958.status[3] << 24);
mutex_lock(&intelhaddata->mutex);
if (intelhaddata->aes_bits != val) {
intelhaddata->aes_bits = val;
changed = 1;
}
mutex_unlock(&intelhaddata->mutex);
return changed;
}
static int had_ctl_eld_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
uinfo->count = HDMI_MAX_ELD_BYTES;
return 0;
}
static int had_ctl_eld_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol);
mutex_lock(&intelhaddata->mutex);
memcpy(ucontrol->value.bytes.data, intelhaddata->eld,
HDMI_MAX_ELD_BYTES);
mutex_unlock(&intelhaddata->mutex);
return 0;
}
static const struct snd_kcontrol_new had_controls[] = {
{
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
.info = had_iec958_info, /* shared */
.get = had_iec958_mask_get,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
.info = had_iec958_info,
.get = had_iec958_get,
.put = had_iec958_put,
},
{
.access = (SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_VOLATILE),
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "ELD",
.info = had_ctl_eld_info,
.get = had_ctl_eld_get,
},
};
/*
* audio interrupt handler
*/
static irqreturn_t display_pipe_interrupt_handler(int irq, void *dev_id)
{
struct snd_intelhad_card *card_ctx = dev_id;
u32 audio_stat[3] = {};
int pipe, port;
for_each_pipe(card_ctx, pipe) {
/* use raw register access to ack IRQs even while disconnected */
audio_stat[pipe] = had_read_register_raw(card_ctx, pipe,
AUD_HDMI_STATUS) &
(HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE);
if (audio_stat[pipe])
had_write_register_raw(card_ctx, pipe,
AUD_HDMI_STATUS, audio_stat[pipe]);
}
for_each_port(card_ctx, port) {
struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
int pipe = ctx->pipe;
if (pipe < 0)
continue;
if (audio_stat[pipe] & HDMI_AUDIO_BUFFER_DONE)
had_process_buffer_done(ctx);
if (audio_stat[pipe] & HDMI_AUDIO_UNDERRUN)
had_process_buffer_underrun(ctx);
}
return IRQ_HANDLED;
}
/*
* monitor plug/unplug notification from i915; just kick off the work
*/
static void notify_audio_lpe(struct platform_device *pdev, int port)
{
struct snd_intelhad_card *card_ctx = platform_get_drvdata(pdev);
struct snd_intelhad *ctx;
ctx = &card_ctx->pcm_ctx[single_port ? 0 : port];
if (single_port)
ctx->port = port;
schedule_work(&ctx->hdmi_audio_wq);
}
/* the work to handle monitor hot plug/unplug */
static void had_audio_wq(struct work_struct *work)
{
struct snd_intelhad *ctx =
container_of(work, struct snd_intelhad, hdmi_audio_wq);
struct intel_hdmi_lpe_audio_pdata *pdata = ctx->dev->platform_data;
struct intel_hdmi_lpe_audio_port_pdata *ppdata = &pdata->port[ctx->port];
pm_runtime_get_sync(ctx->dev);
mutex_lock(&ctx->mutex);
if (ppdata->pipe < 0) {
dev_dbg(ctx->dev, "%s: Event: HAD_NOTIFY_HOT_UNPLUG : port = %d\n",
__func__, ctx->port);
memset(ctx->eld, 0, sizeof(ctx->eld)); /* clear the old ELD */
ctx->dp_output = false;
ctx->tmds_clock_speed = 0;
ctx->link_rate = 0;
/* Shut down the stream */
had_process_hot_unplug(ctx);
ctx->pipe = -1;
} else {
dev_dbg(ctx->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n",
__func__, ctx->port, ppdata->ls_clock);
memcpy(ctx->eld, ppdata->eld, sizeof(ctx->eld));
ctx->dp_output = ppdata->dp_output;
if (ctx->dp_output) {
ctx->tmds_clock_speed = 0;
ctx->link_rate = ppdata->ls_clock;
} else {
ctx->tmds_clock_speed = ppdata->ls_clock;
ctx->link_rate = 0;
}
/*
* Shut down the stream before we change
* the pipe assignment for this pcm device
*/
had_process_hot_plug(ctx);
ctx->pipe = ppdata->pipe;
/* Restart the stream if necessary */
had_process_mode_change(ctx);
}
mutex_unlock(&ctx->mutex);
pm_runtime_mark_last_busy(ctx->dev);
pm_runtime_put_autosuspend(ctx->dev);
}
/*
* Jack interface
*/
static int had_create_jack(struct snd_intelhad *ctx,
struct snd_pcm *pcm)
{
char hdmi_str[32];
int err;
snprintf(hdmi_str, sizeof(hdmi_str),
"HDMI/DP,pcm=%d", pcm->device);
err = snd_jack_new(ctx->card_ctx->card, hdmi_str,
SND_JACK_AVOUT, &ctx->jack,
true, false);
if (err < 0)
return err;
ctx->jack->private_data = ctx;
return 0;
}
/*
* PM callbacks
*/
static int __maybe_unused hdmi_lpe_audio_suspend(struct device *dev)
{
struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
snd_power_change_state(card_ctx->card, SNDRV_CTL_POWER_D3hot);
return 0;
}
static int __maybe_unused hdmi_lpe_audio_resume(struct device *dev)
{
struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev);
pm_runtime_mark_last_busy(dev);
snd_power_change_state(card_ctx->card, SNDRV_CTL_POWER_D0);
return 0;
}
/* release resources */
static void hdmi_lpe_audio_free(struct snd_card *card)
{
struct snd_intelhad_card *card_ctx = card->private_data;
struct intel_hdmi_lpe_audio_pdata *pdata = card_ctx->dev->platform_data;
int port;
spin_lock_irq(&pdata->lpe_audio_slock);
pdata->notify_audio_lpe = NULL;
spin_unlock_irq(&pdata->lpe_audio_slock);
for_each_port(card_ctx, port) {
struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
cancel_work_sync(&ctx->hdmi_audio_wq);
}
if (card_ctx->mmio_start)
iounmap(card_ctx->mmio_start);
if (card_ctx->irq >= 0)
free_irq(card_ctx->irq, card_ctx);
}
/*
* hdmi_lpe_audio_probe - start bridge with i915
*
* This function is called when the i915 driver creates the
* hdmi-lpe-audio platform device.
*/
static int hdmi_lpe_audio_probe(struct platform_device *pdev)
{
struct snd_card *card;
struct snd_intelhad_card *card_ctx;
struct snd_intelhad *ctx;
struct snd_pcm *pcm;
struct intel_hdmi_lpe_audio_pdata *pdata;
int irq;
struct resource *res_mmio;
int port, ret;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "%s: quit: pdata not allocated by i915!!\n", __func__);
return -EINVAL;
}
/* get resources */
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
res_mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res_mmio) {
dev_err(&pdev->dev, "Could not get IO_MEM resources\n");
return -ENXIO;
}
/* create a card instance with ALSA framework */
ret = snd_card_new(&pdev->dev, hdmi_card_index, hdmi_card_id,
THIS_MODULE, sizeof(*card_ctx), &card);
if (ret)
return ret;
card_ctx = card->private_data;
card_ctx->dev = &pdev->dev;
card_ctx->card = card;
strcpy(card->driver, INTEL_HAD);
strcpy(card->shortname, "Intel HDMI/DP LPE Audio");
strcpy(card->longname, "Intel HDMI/DP LPE Audio");
card_ctx->irq = -1;
card->private_free = hdmi_lpe_audio_free;
platform_set_drvdata(pdev, card_ctx);
card_ctx->num_pipes = pdata->num_pipes;
card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
for_each_port(card_ctx, port) {
ctx = &card_ctx->pcm_ctx[port];
ctx->card_ctx = card_ctx;
ctx->dev = card_ctx->dev;
ctx->port = single_port ? -1 : port;
ctx->pipe = -1;
spin_lock_init(&ctx->had_spinlock);
mutex_init(&ctx->mutex);
INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq);
}
dev_dbg(&pdev->dev, "%s: mmio_start = 0x%x, mmio_end = 0x%x\n",
__func__, (unsigned int)res_mmio->start,
(unsigned int)res_mmio->end);
card_ctx->mmio_start = ioremap(res_mmio->start,
(size_t)(resource_size(res_mmio)));
if (!card_ctx->mmio_start) {
dev_err(&pdev->dev, "Could not get ioremap\n");
ret = -EACCES;
goto err;
}
/* setup interrupt handler */
ret = request_irq(irq, display_pipe_interrupt_handler, 0,
pdev->name, card_ctx);
if (ret < 0) {
dev_err(&pdev->dev, "request_irq failed\n");
goto err;
}
card_ctx->irq = irq;
/* only 32bit addressable */
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
init_channel_allocations();
card_ctx->num_pipes = pdata->num_pipes;
card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
for_each_port(card_ctx, port) {
int i;
ctx = &card_ctx->pcm_ctx[port];
ret = snd_pcm_new(card, INTEL_HAD, port, MAX_PB_STREAMS,
MAX_CAP_STREAMS, &pcm);
if (ret)
goto err;
/* setup private data which can be retrieved when required */
pcm->private_data = ctx;
pcm->info_flags = 0;
strscpy(pcm->name, card->shortname, strlen(card->shortname));
/* setup the ops for playabck */
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &had_pcm_ops);
/* allocate dma pages;
* try to allocate 600k buffer as default which is large enough
*/
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_UC,
card->dev, HAD_DEFAULT_BUFFER,
HAD_MAX_BUFFER);
/* create controls */
for (i = 0; i < ARRAY_SIZE(had_controls); i++) {
struct snd_kcontrol *kctl;
kctl = snd_ctl_new1(&had_controls[i], ctx);
if (!kctl) {
ret = -ENOMEM;
goto err;
}
kctl->id.device = pcm->device;
ret = snd_ctl_add(card, kctl);
if (ret < 0)
goto err;
}
/* Register channel map controls */
ret = had_register_chmap_ctls(ctx, pcm);
if (ret < 0)
goto err;
ret = had_create_jack(ctx, pcm);
if (ret < 0)
goto err;
}
ret = snd_card_register(card);
if (ret)
goto err;
spin_lock_irq(&pdata->lpe_audio_slock);
pdata->notify_audio_lpe = notify_audio_lpe;
spin_unlock_irq(&pdata->lpe_audio_slock);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_mark_last_busy(&pdev->dev);
dev_dbg(&pdev->dev, "%s: handle pending notification\n", __func__);
for_each_port(card_ctx, port) {
struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
schedule_work(&ctx->hdmi_audio_wq);
}
return 0;
err:
snd_card_free(card);
return ret;
}
/*
* hdmi_lpe_audio_remove - stop bridge with i915
*
* This function is called when the platform device is destroyed.
*/
static int hdmi_lpe_audio_remove(struct platform_device *pdev)
{
struct snd_intelhad_card *card_ctx = platform_get_drvdata(pdev);
snd_card_free(card_ctx->card);
return 0;
}
static const struct dev_pm_ops hdmi_lpe_audio_pm = {
SET_SYSTEM_SLEEP_PM_OPS(hdmi_lpe_audio_suspend, hdmi_lpe_audio_resume)
};
static struct platform_driver hdmi_lpe_audio_driver = {
.driver = {
.name = "hdmi-lpe-audio",
.pm = &hdmi_lpe_audio_pm,
},
.probe = hdmi_lpe_audio_probe,
.remove = hdmi_lpe_audio_remove,
};
module_platform_driver(hdmi_lpe_audio_driver);
MODULE_ALIAS("platform:hdmi_lpe_audio");
MODULE_AUTHOR("Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>");
MODULE_AUTHOR("Ramesh Babu K V <ramesh.babu@intel.com>");
MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@intel.com>");
MODULE_AUTHOR("Jerome Anand <jerome.anand@intel.com>");
MODULE_DESCRIPTION("Intel HDMI Audio driver");
MODULE_LICENSE("GPL v2");
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