/* * HDMI Channel map support helpers */ #include <linux/module.h> #include <sound/control.h> #include <sound/tlv.h> #include <sound/hda_chmap.h> /* * CEA speaker placement: * * FLH FCH FRH * FLW FL FLC FC FRC FR FRW * * LFE * TC * * 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 */ FLW = (1 << 11), /* Front Left Wide */ FRW = (1 << 12), /* Front Right Wide */ FLH = (1 << 13), /* Front Left High */ FCH = (1 << 14), /* Front Center High */ FRH = (1 << 15), /* Front Right High */ TC = (1 << 16), /* Top Center */ }; static const char * const cea_speaker_allocation_names[] = { /* 0 */ "FL/FR", /* 1 */ "LFE", /* 2 */ "FC", /* 3 */ "RL/RR", /* 4 */ "RC", /* 5 */ "FLC/FRC", /* 6 */ "RLC/RRC", /* 7 */ "FLW/FRW", /* 8 */ "FLH/FRH", /* 9 */ "TC", /* 10 */ "FCH", }; /* * ELD SA bits in the CEA Speaker Allocation data block */ static 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] = FLW | FRW, [8] = FLH | FRH, [9] = TC, [10] = FCH, }; /* * ALSA sequence is: * * surround40 surround41 surround50 surround51 surround71 * ch0 front left = = = = * ch1 front right = = = = * ch2 rear left = = = = * ch3 rear right = = = = * ch4 LFE center center center * ch5 LFE LFE * ch6 side left * ch7 side right * * surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR} */ static int hdmi_channel_mapping[0x32][8] = { /* stereo */ [0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }, /* 2.1 */ [0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }, /* Dolby Surround */ [0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 }, /* surround40 */ [0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 }, /* 4ch */ [0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 }, /* surround41 */ [0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 }, /* surround50 */ [0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 }, /* surround51 */ [0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 }, /* 7.1 */ [0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 }, }; /* * This is an ordered list! * * The preceding ones have better chances to be selected by * hdmi_channel_allocation(). */ static struct hdac_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 } }, { .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } }, { .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } }, { .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } }, { .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } }, { .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } }, }; static int hdmi_pin_set_slot_channel(struct hdac_device *codec, hda_nid_t pin_nid, int asp_slot, int channel) { return snd_hdac_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_CHAN_SLOT, (channel << 4) | asp_slot); } static int hdmi_pin_get_slot_channel(struct hdac_device *codec, hda_nid_t pin_nid, int asp_slot) { return (snd_hdac_codec_read(codec, pin_nid, 0, AC_VERB_GET_HDMI_CHAN_SLOT, asp_slot) & 0xf0) >> 4; } static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid) { return 1 + snd_hdac_codec_read(codec, cvt_nid, 0, AC_VERB_GET_CVT_CHAN_COUNT, 0); } static void hdmi_set_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid, int chs) { if (chs != hdmi_get_channel_count(codec, cvt_nid)) snd_hdac_codec_write(codec, cvt_nid, 0, AC_VERB_SET_CVT_CHAN_COUNT, chs - 1); } /* * Channel mapping routines */ /* * Compute derived values in channel_allocations[]. */ static void init_channel_allocations(void) { int i, j; struct hdac_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]; } } } static int get_channel_allocation_order(int ca) { int i; for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { if (channel_allocations[i].ca_index == ca) break; } return i; } void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen) { int i, j; for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) { if (spk_alloc & (1 << i)) j += snprintf(buf + j, buflen - j, " %s", cea_speaker_allocation_names[i]); } buf[j] = '\0'; /* necessary when j == 0 */ } EXPORT_SYMBOL_GPL(snd_hdac_print_channel_allocation); /* * 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 hdmi_channel_allocation_spk_alloc_blk(struct hdac_device *codec, int spk_alloc, int channels) { int i; int ca = 0; int spk_mask = 0; char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; /* * 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 (spk_alloc & (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; } } if (!ca) { /* * if there was no match, select the regular ALSA channel * allocation with the matching number of channels */ for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { if (channels == channel_allocations[i].channels) { ca = channel_allocations[i].ca_index; break; } } } snd_hdac_print_channel_allocation(spk_alloc, buf, sizeof(buf)); dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n", ca, channels, buf); return ca; } static void hdmi_debug_channel_mapping(struct hdac_chmap *chmap, hda_nid_t pin_nid) { #ifdef CONFIG_SND_DEBUG_VERBOSE int i; int channel; for (i = 0; i < 8; i++) { channel = chmap->ops.pin_get_slot_channel( chmap->hdac, pin_nid, i); dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n", channel, i); } #endif } static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap, hda_nid_t pin_nid, bool non_pcm, int ca) { struct hdac_cea_channel_speaker_allocation *ch_alloc; int i; int err; int order; int non_pcm_mapping[8]; order = get_channel_allocation_order(ca); ch_alloc = &channel_allocations[order]; if (hdmi_channel_mapping[ca][1] == 0) { int hdmi_slot = 0; /* fill actual channel mappings in ALSA channel (i) order */ for (i = 0; i < ch_alloc->channels; i++) { while (!WARN_ON(hdmi_slot >= 8) && !ch_alloc->speakers[7 - hdmi_slot]) hdmi_slot++; /* skip zero slots */ hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++; } /* fill the rest of the slots with ALSA channel 0xf */ for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) if (!ch_alloc->speakers[7 - hdmi_slot]) hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot; } if (non_pcm) { for (i = 0; i < ch_alloc->channels; i++) non_pcm_mapping[i] = (i << 4) | i; for (; i < 8; i++) non_pcm_mapping[i] = (0xf << 4) | i; } for (i = 0; i < 8; i++) { int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i]; int hdmi_slot = slotsetup & 0x0f; int channel = (slotsetup & 0xf0) >> 4; err = chmap->ops.pin_set_slot_channel(chmap->hdac, pin_nid, hdmi_slot, channel); if (err) { dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n"); break; } } } struct channel_map_table { unsigned char map; /* ALSA API channel map position */ int spk_mask; /* speaker position bit mask */ }; static struct channel_map_table map_tables[] = { { SNDRV_CHMAP_FL, FL }, { SNDRV_CHMAP_FR, FR }, { SNDRV_CHMAP_RL, RL }, { SNDRV_CHMAP_RR, RR }, { SNDRV_CHMAP_LFE, LFE }, { SNDRV_CHMAP_FC, FC }, { SNDRV_CHMAP_RLC, RLC }, { SNDRV_CHMAP_RRC, RRC }, { SNDRV_CHMAP_RC, RC }, { SNDRV_CHMAP_FLC, FLC }, { SNDRV_CHMAP_FRC, FRC }, { SNDRV_CHMAP_TFL, FLH }, { SNDRV_CHMAP_TFR, FRH }, { SNDRV_CHMAP_FLW, FLW }, { SNDRV_CHMAP_FRW, FRW }, { SNDRV_CHMAP_TC, TC }, { SNDRV_CHMAP_TFC, FCH }, {} /* terminator */ }; /* from ALSA API channel position to speaker bit mask */ int snd_hdac_chmap_to_spk_mask(unsigned char c) { struct channel_map_table *t = map_tables; for (; t->map; t++) { if (t->map == c) return t->spk_mask; } return 0; } EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask); /* from ALSA API channel position to CEA slot */ static int to_cea_slot(int ordered_ca, unsigned char pos) { int mask = snd_hdac_chmap_to_spk_mask(pos); int i; /* Add sanity check to pass klockwork check. * This should never happen. */ if (ordered_ca >= ARRAY_SIZE(channel_allocations)) return -1; if (mask) { for (i = 0; i < 8; i++) { if (channel_allocations[ordered_ca].speakers[7 - i] == mask) return i; } } return -1; } /* from speaker bit mask to ALSA API channel position */ int snd_hdac_spk_to_chmap(int spk) { struct channel_map_table *t = map_tables; for (; t->map; t++) { if (t->spk_mask == spk) return t->map; } return 0; } EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap); /* from CEA slot to ALSA API channel position */ static int from_cea_slot(int ordered_ca, unsigned char slot) { int mask; /* Add sanity check to pass klockwork check. * This should never happen. */ if (slot >= 8) return 0; mask = channel_allocations[ordered_ca].speakers[7 - slot]; return snd_hdac_spk_to_chmap(mask); } /* get the CA index corresponding to the given ALSA API channel map */ static int hdmi_manual_channel_allocation(int chs, unsigned char *map) { int i, spks = 0, spk_mask = 0; for (i = 0; i < chs; i++) { int mask = snd_hdac_chmap_to_spk_mask(map[i]); if (mask) { spk_mask |= mask; spks++; } } for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { if ((chs == channel_allocations[i].channels || spks == channel_allocations[i].channels) && (spk_mask & channel_allocations[i].spk_mask) == channel_allocations[i].spk_mask) return channel_allocations[i].ca_index; } return -1; } /* set up the channel slots for the given ALSA API channel map */ static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap, hda_nid_t pin_nid, int chs, unsigned char *map, int ca) { int ordered_ca = get_channel_allocation_order(ca); int alsa_pos, hdmi_slot; int assignments[8] = {[0 ... 7] = 0xf}; for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) { hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]); if (hdmi_slot < 0) continue; /* unassigned channel */ assignments[hdmi_slot] = alsa_pos; } for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) { int err; err = chmap->ops.pin_set_slot_channel(chmap->hdac, pin_nid, hdmi_slot, assignments[hdmi_slot]); if (err) return -EINVAL; } return 0; } /* store ALSA API channel map from the current default map */ static void hdmi_setup_fake_chmap(unsigned char *map, int ca) { int i; int ordered_ca = get_channel_allocation_order(ca); for (i = 0; i < 8; i++) { if (ordered_ca < ARRAY_SIZE(channel_allocations) && i < channel_allocations[ordered_ca].channels) map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f); else map[i] = 0; } } void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap, hda_nid_t pin_nid, bool non_pcm, int ca, int channels, unsigned char *map, bool chmap_set) { if (!non_pcm && chmap_set) { hdmi_manual_setup_channel_mapping(chmap, pin_nid, channels, map, ca); } else { hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca); hdmi_setup_fake_chmap(map, ca); } hdmi_debug_channel_mapping(chmap, pin_nid); } EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping); int snd_hdac_get_active_channels(int ca) { int ordered_ca = get_channel_allocation_order(ca); /* Add sanity check to pass klockwork check. * This should never happen. */ if (ordered_ca >= ARRAY_SIZE(channel_allocations)) ordered_ca = 0; return channel_allocations[ordered_ca].channels; } EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels); struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca) { return &channel_allocations[get_channel_allocation_order(ca)]; } EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca); int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc, int channels, bool chmap_set, bool non_pcm, unsigned char *map) { int ca; if (!non_pcm && chmap_set) ca = hdmi_manual_channel_allocation(channels, map); else ca = hdmi_channel_allocation_spk_alloc_blk(hdac, spk_alloc, channels); if (ca < 0) ca = 0; return ca; } EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation); /* * ALSA API channel-map control callbacks */ static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); struct hdac_chmap *chmap = info->private_data; uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = chmap->channels_max; uinfo->value.integer.min = 0; uinfo->value.integer.max = SNDRV_CHMAP_LAST; return 0; } static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap, struct hdac_cea_channel_speaker_allocation *cap, int channels) { /* If the speaker allocation matches the channel count, it is OK.*/ if (cap->channels != channels) return -1; /* all channels are remappable freely */ return SNDRV_CTL_TLVT_CHMAP_VAR; } static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap, struct hdac_cea_channel_speaker_allocation *cap, unsigned int *chmap, int channels) { int count = 0; int c; for (c = 7; c >= 0; c--) { int spk = cap->speakers[c]; if (!spk) continue; chmap[count++] = snd_hdac_spk_to_chmap(spk); } WARN_ON(count != channels); } static int spk_mask_from_spk_alloc(int spk_alloc) { int i; int spk_mask = eld_speaker_allocation_bits[0]; for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { if (spk_alloc & (1 << i)) spk_mask |= eld_speaker_allocation_bits[i]; } return spk_mask; } static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *tlv) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); struct hdac_chmap *chmap = info->private_data; int pcm_idx = kcontrol->private_value; unsigned int __user *dst; int chs, count = 0; unsigned long max_chs; int type; int spk_alloc, spk_mask; if (size < 8) return -ENOMEM; if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) return -EFAULT; size -= 8; dst = tlv + 2; spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx); spk_mask = spk_mask_from_spk_alloc(spk_alloc); max_chs = hweight_long(spk_mask); for (chs = 2; chs <= max_chs; chs++) { int i; struct hdac_cea_channel_speaker_allocation *cap; cap = channel_allocations; for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) { int chs_bytes = chs * 4; unsigned int tlv_chmap[8]; if (cap->channels != chs) continue; if (!(cap->spk_mask == (spk_mask & cap->spk_mask))) continue; type = chmap->ops.chmap_cea_alloc_validate_get_type( chmap, cap, chs); if (type < 0) return -ENODEV; if (size < 8) return -ENOMEM; if (put_user(type, dst) || put_user(chs_bytes, dst + 1)) return -EFAULT; dst += 2; size -= 8; count += 8; if (size < chs_bytes) return -ENOMEM; size -= chs_bytes; count += chs_bytes; chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap, tlv_chmap, chs); if (copy_to_user(dst, tlv_chmap, chs_bytes)) return -EFAULT; dst += chs; } } if (put_user(count, tlv + 1)) return -EFAULT; return 0; } static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); struct hdac_chmap *chmap = info->private_data; int pcm_idx = kcontrol->private_value; unsigned char pcm_chmap[8]; int i; memset(pcm_chmap, 0, sizeof(pcm_chmap)); chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap); for (i = 0; i < sizeof(chmap); i++) ucontrol->value.integer.value[i] = pcm_chmap[i]; return 0; } static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); struct hdac_chmap *hchmap = info->private_data; int pcm_idx = kcontrol->private_value; unsigned int ctl_idx; struct snd_pcm_substream *substream; unsigned char chmap[8], per_pin_chmap[8]; int i, err, ca, prepared = 0; /* No monitor is connected in dyn_pcm_assign. * It's invalid to setup the chmap */ if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx)) return 0; ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); substream = snd_pcm_chmap_substream(info, ctl_idx); if (!substream || !substream->runtime) return 0; /* just for avoiding error from alsactl restore */ switch (substream->runtime->status->state) { case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_SETUP: break; case SNDRV_PCM_STATE_PREPARED: prepared = 1; break; default: return -EBUSY; } memset(chmap, 0, sizeof(chmap)); for (i = 0; i < ARRAY_SIZE(chmap); i++) chmap[i] = ucontrol->value.integer.value[i]; hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap); if (!memcmp(chmap, per_pin_chmap, sizeof(chmap))) return 0; ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap); if (ca < 0) return -EINVAL; if (hchmap->ops.chmap_validate) { err = hchmap->ops.chmap_validate(hchmap, ca, ARRAY_SIZE(chmap), chmap); if (err) return err; } hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared); return 0; } static const struct hdac_chmap_ops chmap_ops = { .chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type, .cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap, .pin_get_slot_channel = hdmi_pin_get_slot_channel, .pin_set_slot_channel = hdmi_pin_set_slot_channel, .set_channel_count = hdmi_set_channel_count, }; void snd_hdac_register_chmap_ops(struct hdac_device *hdac, struct hdac_chmap *chmap) { chmap->ops = chmap_ops; chmap->hdac = hdac; init_channel_allocations(); } EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops); int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx, struct hdac_chmap *hchmap) { struct snd_pcm_chmap *chmap; struct snd_kcontrol *kctl; int err, i; err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, NULL, 0, pcm_idx, &chmap); if (err < 0) return err; /* override handlers */ chmap->private_data = hchmap; kctl = chmap->kctl; for (i = 0; i < kctl->count; i++) kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE; kctl->info = hdmi_chmap_ctl_info; kctl->get = hdmi_chmap_ctl_get; kctl->put = hdmi_chmap_ctl_put; kctl->tlv.c = hdmi_chmap_ctl_tlv; return 0; } EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);