diff options
Diffstat (limited to 'sound/hda/hdmi_chmap.c')
| -rw-r--r-- | sound/hda/hdmi_chmap.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/sound/hda/hdmi_chmap.c b/sound/hda/hdmi_chmap.c new file mode 100644 index 0000000000..5d8e1d944b --- /dev/null +++ b/sound/hda/hdmi_chmap.c @@ -0,0 +1,850 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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 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] = 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 += scnprintf(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 < ARRAY_SIZE(pcm_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->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); |