diff options
Diffstat (limited to 'sound/x86')
| -rw-r--r-- | sound/x86/Kconfig | 17 | ||||
| -rw-r--r-- | sound/x86/Makefile | 4 | ||||
| -rw-r--r-- | sound/x86/intel_hdmi_audio.c | 1867 | ||||
| -rw-r--r-- | sound/x86/intel_hdmi_audio.h | 136 | ||||
| -rw-r--r-- | sound/x86/intel_hdmi_lpe_audio.h | 328 |
5 files changed, 2352 insertions, 0 deletions
diff --git a/sound/x86/Kconfig b/sound/x86/Kconfig new file mode 100644 index 000000000000..8adf4d1bd46e --- /dev/null +++ b/sound/x86/Kconfig @@ -0,0 +1,17 @@ +menuconfig SND_X86 + bool "X86 sound devices" + depends on X86 + default y + ---help--- + X86 sound devices that don't fall under SoC or PCI categories + +if SND_X86 + +config HDMI_LPE_AUDIO + tristate "HDMI audio without HDaudio on Intel Atom platforms" + depends on DRM_I915 + select SND_PCM + help + Choose this option to support HDMI LPE Audio mode + +endif # SND_X86 diff --git a/sound/x86/Makefile b/sound/x86/Makefile new file mode 100644 index 000000000000..7ff919808320 --- /dev/null +++ b/sound/x86/Makefile @@ -0,0 +1,4 @@ +snd-hdmi-lpe-audio-objs += \ + intel_hdmi_audio.o + +obj-$(CONFIG_HDMI_LPE_AUDIO) += snd-hdmi-lpe-audio.o diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c new file mode 100644 index 000000000000..c505b019e09c --- /dev/null +++ b/sound/x86/intel_hdmi_audio.c @@ -0,0 +1,1867 @@ +/* + * 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> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * 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 <asm/cacheflush.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" + +/*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; + +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."); + +/* + * 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); +} + +/* Register access functions */ +static u32 had_read_register_raw(struct snd_intelhad *ctx, u32 reg) +{ + return ioread32(ctx->mmio_start + ctx->had_config_offset + reg); +} + +static void had_write_register_raw(struct snd_intelhad *ctx, u32 reg, u32 val) +{ + iowrite32(val, ctx->mmio_start + ctx->had_config_offset + 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, reg); +} + +static void had_write_register(struct snd_intelhad *ctx, u32 reg, u32 val) +{ + if (ctx->connected) + had_write_register_raw(ctx, 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_cfg cfg_val = {.regval = 0}; + 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; + cfg_val.regx.val_bit = ch_stat0.regx.lpcm_id; + + 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; + unsigned long addr; + int pages, buf_size, retval; + + intelhaddata = snd_pcm_substream_chip(substream); + buf_size = params_buffer_bytes(hw_params); + retval = snd_pcm_lib_malloc_pages(substream, buf_size); + if (retval < 0) + return retval; + dev_dbg(intelhaddata->dev, "%s:allocated memory = %d\n", + __func__, buf_size); + /* mark the pages as uncached region */ + addr = (unsigned long) substream->runtime->dma_area; + pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) / PAGE_SIZE; + retval = set_memory_uc(addr, pages); + if (retval) { + dev_err(intelhaddata->dev, "set_memory_uc failed.Error:%d\n", + retval); + return retval; + } + memset(substream->runtime->dma_area, 0, buf_size); + + return retval; +} + +/* + * ALSA PCM hw_free callback + */ +static int had_pcm_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_intelhad *intelhaddata; + unsigned long addr; + u32 pages; + + intelhaddata = snd_pcm_substream_chip(substream); + had_do_reset(intelhaddata); + + /* mark back the pages as cached/writeback region before the free */ + if (substream->runtime->dma_area != NULL) { + addr = (unsigned long) substream->runtime->dma_area; + pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) / + PAGE_SIZE; + set_memory_wb(addr, pages); + return snd_pcm_lib_free_pages(substream); + } + 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, + .ioctl = snd_pcm_lib_ioctl, + .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; + } + + 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 *ctx = dev_id; + u32 audio_stat; + + /* use raw register access to ack IRQs even while disconnected */ + audio_stat = had_read_register_raw(ctx, AUD_HDMI_STATUS); + + if (audio_stat & HDMI_AUDIO_UNDERRUN) { + had_write_register_raw(ctx, AUD_HDMI_STATUS, + HDMI_AUDIO_UNDERRUN); + had_process_buffer_underrun(ctx); + } + + if (audio_stat & HDMI_AUDIO_BUFFER_DONE) { + had_write_register_raw(ctx, AUD_HDMI_STATUS, + HDMI_AUDIO_BUFFER_DONE); + had_process_buffer_done(ctx); + } + + return IRQ_HANDLED; +} + +/* + * monitor plug/unplug notification from i915; just kick off the work + */ +static void notify_audio_lpe(struct platform_device *pdev) +{ + struct snd_intelhad *ctx = platform_get_drvdata(pdev); + + 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; + + pm_runtime_get_sync(ctx->dev); + mutex_lock(&ctx->mutex); + if (!pdata->hdmi_connected) { + dev_dbg(ctx->dev, "%s: Event: HAD_NOTIFY_HOT_UNPLUG\n", + __func__); + memset(ctx->eld, 0, sizeof(ctx->eld)); /* clear the old ELD */ + had_process_hot_unplug(ctx); + } else { + struct intel_hdmi_lpe_audio_eld *eld = &pdata->eld; + + dev_dbg(ctx->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n", + __func__, eld->port_id, pdata->tmds_clock_speed); + + switch (eld->pipe_id) { + case 0: + ctx->had_config_offset = AUDIO_HDMI_CONFIG_A; + break; + case 1: + ctx->had_config_offset = AUDIO_HDMI_CONFIG_B; + break; + case 2: + ctx->had_config_offset = AUDIO_HDMI_CONFIG_C; + break; + default: + dev_dbg(ctx->dev, "Invalid pipe %d\n", + eld->pipe_id); + break; + } + + memcpy(ctx->eld, eld->eld_data, sizeof(ctx->eld)); + + ctx->dp_output = pdata->dp_output; + ctx->tmds_clock_speed = pdata->tmds_clock_speed; + ctx->link_rate = pdata->link_rate; + + had_process_hot_plug(ctx); + + /* Process mode change if stream is active */ + 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) +{ + int err; + + err = snd_jack_new(ctx->card, "HDMI/DP", SND_JACK_AVOUT, &ctx->jack, + true, false); + if (err < 0) + return err; + ctx->jack->private_data = ctx; + return 0; +} + +/* + * PM callbacks + */ + +static int hdmi_lpe_audio_runtime_suspend(struct device *dev) +{ + struct snd_intelhad *ctx = dev_get_drvdata(dev); + struct snd_pcm_substream *substream; + + substream = had_substream_get(ctx); + if (substream) { + snd_pcm_suspend(substream); + had_substream_put(ctx); + } + + return 0; +} + +static int __maybe_unused hdmi_lpe_audio_suspend(struct device *dev) +{ + struct snd_intelhad *ctx = dev_get_drvdata(dev); + int err; + + err = hdmi_lpe_audio_runtime_suspend(dev); + if (!err) + snd_power_change_state(ctx->card, SNDRV_CTL_POWER_D3hot); + return err; +} + +static int hdmi_lpe_audio_runtime_resume(struct device *dev) +{ + pm_runtime_mark_last_busy(dev); + return 0; +} + +static int __maybe_unused hdmi_lpe_audio_resume(struct device *dev) +{ + struct snd_intelhad *ctx = dev_get_drvdata(dev); + + hdmi_lpe_audio_runtime_resume(dev); + snd_power_change_state(ctx->card, SNDRV_CTL_POWER_D0); + return 0; +} + +/* release resources */ +static void hdmi_lpe_audio_free(struct snd_card *card) +{ + struct snd_intelhad *ctx = card->private_data; + + cancel_work_sync(&ctx->hdmi_audio_wq); + + if (ctx->mmio_start) + iounmap(ctx->mmio_start); + if (ctx->irq >= 0) + free_irq(ctx->irq, 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 *ctx; + struct snd_pcm *pcm; + struct intel_hdmi_lpe_audio_pdata *pdata; + int irq; + struct resource *res_mmio; + int i, 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) { + dev_err(&pdev->dev, "Could not get irq resource\n"); + return -ENODEV; + } + + 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(*ctx), &card); + if (ret) + return ret; + + ctx = card->private_data; + spin_lock_init(&ctx->had_spinlock); + mutex_init(&ctx->mutex); + ctx->connected = false; + ctx->dev = &pdev->dev; + ctx->card = card; + ctx->aes_bits = SNDRV_PCM_DEFAULT_CON_SPDIF; + strcpy(card->driver, INTEL_HAD); + strcpy(card->shortname, "Intel HDMI/DP LPE Audio"); + strcpy(card->longname, "Intel HDMI/DP LPE Audio"); + + ctx->irq = -1; + ctx->tmds_clock_speed = DIS_SAMPLE_RATE_148_5; + INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq); + + card->private_free = hdmi_lpe_audio_free; + + /* assume pipe A as default */ + ctx->had_config_offset = AUDIO_HDMI_CONFIG_A; + + platform_set_drvdata(pdev, ctx); + + 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); + + ctx->mmio_start = ioremap_nocache(res_mmio->start, + (size_t)(resource_size(res_mmio))); + if (!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, ctx); + if (ret < 0) { + dev_err(&pdev->dev, "request_irq failed\n"); + goto err; + } + + ctx->irq = irq; + + ret = snd_pcm_new(card, INTEL_HAD, PCM_INDEX, 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; + strncpy(pcm->name, card->shortname, strlen(card->shortname)); + /* setup the ops for playabck */ + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &had_pcm_ops); + + /* only 32bit addressable */ + dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + + /* allocate dma pages; + * try to allocate 600k buffer as default which is large enough + */ + snd_pcm_lib_preallocate_pages_for_all(pcm, + SNDRV_DMA_TYPE_DEV, NULL, + HAD_DEFAULT_BUFFER, HAD_MAX_BUFFER); + + /* create controls */ + for (i = 0; i < ARRAY_SIZE(had_controls); i++) { + ret = snd_ctl_add(card, snd_ctl_new1(&had_controls[i], ctx)); + if (ret < 0) + goto err; + } + + init_channel_allocations(); + + /* Register channel map controls */ + ret = had_register_chmap_ctls(ctx, pcm); + if (ret < 0) + goto err; + + ret = had_create_jack(ctx); + 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; + pdata->notify_pending = false; + spin_unlock_irq(&pdata->lpe_audio_slock); + + /* runtime PM isn't enabled as default, since it won't save much on + * BYT/CHT devices; user who want the runtime PM should adjust the + * power/ontrol and power/autosuspend_delay_ms sysfs entries instead + */ + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + + dev_dbg(&pdev->dev, "%s: handle pending notification\n", __func__); + 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 *ctx = platform_get_drvdata(pdev); + + snd_card_free(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) + SET_RUNTIME_PM_OPS(hdmi_lpe_audio_runtime_suspend, + hdmi_lpe_audio_runtime_resume, NULL) +}; + +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"); +MODULE_SUPPORTED_DEVICE("{Intel,Intel_HAD}"); diff --git a/sound/x86/intel_hdmi_audio.h b/sound/x86/intel_hdmi_audio.h new file mode 100644 index 000000000000..2d3e389f76b3 --- /dev/null +++ b/sound/x86/intel_hdmi_audio.h @@ -0,0 +1,136 @@ +/* + * Copyright (C) 2016 Intel Corporation + * 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> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial + * portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef _INTEL_HDMI_AUDIO_H_ +#define _INTEL_HDMI_AUDIO_H_ + +#include "intel_hdmi_lpe_audio.h" + +#define PCM_INDEX 0 +#define MAX_PB_STREAMS 1 +#define MAX_CAP_STREAMS 0 +#define BYTES_PER_WORD 0x4 +#define INTEL_HAD "HdmiLpeAudio" + +/* + * CEA speaker placement: + * + * FL FLC FC FRC FR + * + * LFE + * + * RL RLC RC RRC RR + * + * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M + * corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is + * swapped to CEA LFE/FC. + */ +enum cea_speaker_placement { + FL = (1 << 0), /* Front Left */ + FC = (1 << 1), /* Front Center */ + FR = (1 << 2), /* Front Right */ + FLC = (1 << 3), /* Front Left Center */ + FRC = (1 << 4), /* Front Right Center */ + RL = (1 << 5), /* Rear Left */ + RC = (1 << 6), /* Rear Center */ + RR = (1 << 7), /* Rear Right */ + RLC = (1 << 8), /* Rear Left Center */ + RRC = (1 << 9), /* Rear Right Center */ + LFE = (1 << 10), /* Low Frequency Effect */ +}; + +struct cea_channel_speaker_allocation { + int ca_index; + int speakers[8]; + + /* derived values, just for convenience */ + int channels; + int spk_mask; +}; + +struct channel_map_table { + unsigned char map; /* ALSA API channel map position */ + unsigned char cea_slot; /* CEA slot value */ + int spk_mask; /* speaker position bit mask */ +}; + +struct pcm_stream_info { + struct snd_pcm_substream *substream; + int substream_refcount; +}; + +/* + * struct snd_intelhad - intelhad driver structure + * + * @card: ptr to hold card details + * @connected: the monitor connection status + * @stream_info: stream information + * @eld: holds ELD info + * @curr_buf: pointer to hold current active ring buf + * @valid_buf_cnt: ring buffer count for stream + * @had_spinlock: driver lock + * @aes_bits: IEC958 status bits + * @buff_done: id of current buffer done intr + * @dev: platoform device handle + * @chmap: holds channel map info + */ +struct snd_intelhad { + struct snd_card *card; + bool connected; + struct pcm_stream_info stream_info; + unsigned char eld[HDMI_MAX_ELD_BYTES]; + bool dp_output; + unsigned int aes_bits; + spinlock_t had_spinlock; + struct device *dev; + struct snd_pcm_chmap *chmap; + int tmds_clock_speed; + int link_rate; + + /* ring buffer (BD) position index */ + unsigned int bd_head; + /* PCM buffer position indices */ + unsigned int pcmbuf_head; /* being processed */ + unsigned int pcmbuf_filled; /* to be filled */ + + unsigned int num_bds; /* number of BDs */ + unsigned int period_bytes; /* PCM period size in bytes */ + + /* internal stuff */ + int irq; + void __iomem *mmio_start; + unsigned int had_config_offset; + union aud_cfg aud_config; /* AUD_CONFIG reg value cache */ + struct work_struct hdmi_audio_wq; + struct mutex mutex; /* for protecting chmap and eld */ + bool need_reset; + struct snd_jack *jack; +}; + +#endif /* _INTEL_HDMI_AUDIO_ */ diff --git a/sound/x86/intel_hdmi_lpe_audio.h b/sound/x86/intel_hdmi_lpe_audio.h new file mode 100644 index 000000000000..477e5153307c --- /dev/null +++ b/sound/x86/intel_hdmi_lpe_audio.h @@ -0,0 +1,328 @@ +/* + * intel_hdmi_lpe_audio.h - Intel HDMI LPE 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> + * Aravind Siddappaji <aravindx.siddappaji@intel.com> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ +#ifndef __INTEL_HDMI_LPE_AUDIO_H +#define __INTEL_HDMI_LPE_AUDIO_H + +#define HAD_MIN_CHANNEL 2 +#define HAD_MAX_CHANNEL 8 +#define HAD_NUM_OF_RING_BUFS 4 + +/* max 20bit address, aligned to 64 */ +#define HAD_MAX_BUFFER ((1024 * 1024 - 1) & ~0x3f) +#define HAD_DEFAULT_BUFFER (600 * 1024) /* default prealloc size */ +#define HAD_MAX_PERIODS 256 /* arbitrary, but should suffice */ +#define HAD_MIN_PERIODS 1 +#define HAD_MAX_PERIOD_BYTES ((HAD_MAX_BUFFER / HAD_MIN_PERIODS) & ~0x3f) +#define HAD_MIN_PERIOD_BYTES 1024 /* might be smaller */ +#define HAD_FIFO_SIZE 0 /* fifo not being used */ +#define MAX_SPEAKERS 8 + +#define AUD_SAMPLE_RATE_32 32000 +#define AUD_SAMPLE_RATE_44_1 44100 +#define AUD_SAMPLE_RATE_48 48000 +#define AUD_SAMPLE_RATE_88_2 88200 +#define AUD_SAMPLE_RATE_96 96000 +#define AUD_SAMPLE_RATE_176_4 176400 +#define AUD_SAMPLE_RATE_192 192000 + +#define HAD_MIN_RATE AUD_SAMPLE_RATE_32 +#define HAD_MAX_RATE AUD_SAMPLE_RATE_192 + +#define DIS_SAMPLE_RATE_25_2 25200 +#define DIS_SAMPLE_RATE_27 27000 +#define DIS_SAMPLE_RATE_54 54000 +#define DIS_SAMPLE_RATE_74_25 74250 +#define DIS_SAMPLE_RATE_148_5 148500 +#define HAD_REG_WIDTH 0x08 +#define HAD_MAX_DIP_WORDS 16 + +/* DP Link Rates */ +#define DP_2_7_GHZ 270000 +#define DP_1_62_GHZ 162000 + +/* Maud Values */ +#define AUD_SAMPLE_RATE_32_DP_2_7_MAUD_VAL 1988 +#define AUD_SAMPLE_RATE_44_1_DP_2_7_MAUD_VAL 2740 +#define AUD_SAMPLE_RATE_48_DP_2_7_MAUD_VAL 2982 +#define AUD_SAMPLE_RATE_88_2_DP_2_7_MAUD_VAL 5480 +#define AUD_SAMPLE_RATE_96_DP_2_7_MAUD_VAL 5965 +#define AUD_SAMPLE_RATE_176_4_DP_2_7_MAUD_VAL 10961 +#define HAD_MAX_RATE_DP_2_7_MAUD_VAL 11930 +#define AUD_SAMPLE_RATE_32_DP_1_62_MAUD_VAL 3314 +#define AUD_SAMPLE_RATE_44_1_DP_1_62_MAUD_VAL 4567 +#define AUD_SAMPLE_RATE_48_DP_1_62_MAUD_VAL 4971 +#define AUD_SAMPLE_RATE_88_2_DP_1_62_MAUD_VAL 9134 +#define AUD_SAMPLE_RATE_96_DP_1_62_MAUD_VAL 9942 +#define AUD_SAMPLE_RATE_176_4_DP_1_62_MAUD_VAL 18268 +#define HAD_MAX_RATE_DP_1_62_MAUD_VAL 19884 + +/* Naud Value */ +#define DP_NAUD_VAL 32768 + +/* HDMI Controller register offsets - audio domain common */ +/* Base address for below regs = 0x65000 */ +enum hdmi_ctrl_reg_offset_common { + AUDIO_HDMI_CONFIG_A = 0x000, + AUDIO_HDMI_CONFIG_B = 0x800, + AUDIO_HDMI_CONFIG_C = 0x900, +}; +/* HDMI controller register offsets */ +enum hdmi_ctrl_reg_offset { + AUD_CONFIG = 0x0, + AUD_CH_STATUS_0 = 0x08, + AUD_CH_STATUS_1 = 0x0C, + AUD_HDMI_CTS = 0x10, + AUD_N_ENABLE = 0x14, + AUD_SAMPLE_RATE = 0x18, + AUD_BUF_CONFIG = 0x20, + AUD_BUF_CH_SWAP = 0x24, + AUD_BUF_A_ADDR = 0x40, + AUD_BUF_A_LENGTH = 0x44, + AUD_BUF_B_ADDR = 0x48, + AUD_BUF_B_LENGTH = 0x4c, + AUD_BUF_C_ADDR = 0x50, + AUD_BUF_C_LENGTH = 0x54, + AUD_BUF_D_ADDR = 0x58, + AUD_BUF_D_LENGTH = 0x5c, + AUD_CNTL_ST = 0x60, + AUD_HDMI_STATUS = 0x64, /* v2 */ + AUD_HDMIW_INFOFR = 0x68, /* v2 */ +}; + +/* Audio configuration */ +union aud_cfg { + struct { + u32 aud_en:1; + u32 layout:1; /* LAYOUT[01], see below */ + u32 fmt:2; + u32 num_ch:3; + u32 set:1; + u32 flat:1; + u32 val_bit:1; + u32 user_bit:1; + u32 underrun:1; /* 0: send null packets, + * 1: send silence stream + */ + u32 packet_mode:1; /* 0: 32bit container, 1: 16bit */ + u32 left_align:1; /* 0: MSB bits 0-23, 1: bits 8-31 */ + u32 bogus_sample:1; /* bogus sample for odd channels */ + u32 dp_modei:1; /* 0: HDMI, 1: DP */ + u32 rsvd:16; + } regx; + u32 regval; +}; + +#define AUD_CONFIG_VALID_BIT (1 << 9) +#define AUD_CONFIG_DP_MODE (1 << 15) +#define AUD_CONFIG_CH_MASK 0x70 +#define LAYOUT0 0 /* interleaved stereo */ +#define LAYOUT1 1 /* for channels > 2 */ + +/* Audio Channel Status 0 Attributes */ +union aud_ch_status_0 { + struct { + u32 ch_status:1; + u32 lpcm_id:1; + u32 cp_info:1; + u32 format:3; + u32 mode:2; + u32 ctg_code:8; + u32 src_num:4; + u32 ch_num:4; + u32 samp_freq:4; /* CH_STATUS_MAP_XXX */ + u32 clk_acc:2; + u32 rsvd:2; + } regx; + u32 regval; +}; + +/* samp_freq values - Sampling rate as per IEC60958 Ver 3 */ +#define CH_STATUS_MAP_32KHZ 0x3 +#define CH_STATUS_MAP_44KHZ 0x0 +#define CH_STATUS_MAP_48KHZ 0x2 +#define CH_STATUS_MAP_88KHZ 0x8 +#define CH_STATUS_MAP_96KHZ 0xA +#define CH_STATUS_MAP_176KHZ 0xC +#define CH_STATUS_MAP_192KHZ 0xE + +/* Audio Channel Status 1 Attributes */ +union aud_ch_status_1 { + struct { + u32 max_wrd_len:1; + u32 wrd_len:3; + u32 rsvd:28; + } regx; + u32 regval; +}; + +#define MAX_SMPL_WIDTH_20 0x0 +#define MAX_SMPL_WIDTH_24 0x1 +#define SMPL_WIDTH_16BITS 0x1 +#define SMPL_WIDTH_24BITS 0x5 + +/* CTS register */ +union aud_hdmi_cts { + struct { + u32 cts_val:24; + u32 en_cts_prog:1; + u32 rsvd:7; + } regx; + u32 regval; +}; + +/* N register */ +union aud_hdmi_n_enable { + struct { + u32 n_val:24; + u32 en_n_prog:1; + u32 rsvd:7; + } regx; + u32 regval; +}; + +/* Audio Buffer configurations */ +union aud_buf_config { + struct { + u32 audio_fifo_watermark:8; + u32 dma_fifo_watermark:3; + u32 rsvd0:5; + u32 aud_delay:8; + u32 rsvd1:8; + } regx; + u32 regval; +}; + +#define FIFO_THRESHOLD 0xFE +#define DMA_FIFO_THRESHOLD 0x7 + +/* Audio Sample Swapping offset */ +union aud_buf_ch_swap { + struct { + u32 first_0:3; + u32 second_0:3; + u32 first_1:3; + u32 second_1:3; + u32 first_2:3; + u32 second_2:3; + u32 first_3:3; + u32 second_3:3; + u32 rsvd:8; + } regx; + u32 regval; +}; + +#define SWAP_LFE_CENTER 0x00fac4c8 /* octal 76543210 */ + +/* Address for Audio Buffer */ +union aud_buf_addr { + struct { + u32 valid:1; + u32 intr_en:1; + u32 rsvd:4; + u32 addr:26; + } regx; + u32 regval; +}; + +#define AUD_BUF_VALID (1U << 0) +#define AUD_BUF_INTR_EN (1U << 1) + +/* Length of Audio Buffer */ +union aud_buf_len { + struct { + u32 buf_len:20; + u32 rsvd:12; + } regx; + u32 regval; +}; + +/* Audio Control State Register offset */ +union aud_ctrl_st { + struct { + u32 ram_addr:4; + u32 eld_ack:1; + u32 eld_addr:4; + u32 eld_buf_size:5; + u32 eld_valid:1; + u32 cp_ready:1; + u32 dip_freq:2; + u32 dip_idx:3; + u32 dip_en_sta:4; + u32 rsvd:7; + } regx; + u32 regval; +}; + +/* Audio HDMI Widget Data Island Packet offset */ +union aud_info_frame1 { + struct { + u32 pkt_type:8; + u32 ver_num:8; + u32 len:5; + u32 rsvd:11; + } regx; + u32 regval; +}; + +#define HDMI_INFO_FRAME_WORD1 0x000a0184 +#define DP_INFO_FRAME_WORD1 0x00441b84 + +/* DIP frame 2 */ +union aud_info_frame2 { + struct { + u32 chksum:8; + u32 chnl_cnt:3; + u32 rsvd0:1; + u32 coding_type:4; + u32 smpl_size:2; + u32 smpl_freq:3; + u32 rsvd1:3; + u32 format:8; + } regx; + u32 regval; +}; + +/* DIP frame 3 */ +union aud_info_frame3 { + struct { + u32 chnl_alloc:8; + u32 rsvd0:3; + u32 lsv:4; + u32 dm_inh:1; + u32 rsvd1:16; + } regx; + u32 regval; +}; + +#define VALID_DIP_WORDS 3 + +/* AUD_HDMI_STATUS bits */ +#define HDMI_AUDIO_UNDERRUN (1U << 31) +#define HDMI_AUDIO_BUFFER_DONE (1U << 29) + +/* AUD_HDMI_STATUS register mask */ +#define AUD_HDMI_STATUS_MASK_UNDERRUN 0xC0000000 +#define AUD_HDMI_STATUS_MASK_SRDBG 0x00000002 +#define AUD_HDMI_STATUSG_MASK_FUNCRST 0x00000001 + +#endif |