/* * Generic routines and proc interface for ELD(EDID Like Data) information * * Copyright(c) 2008 Intel Corporation. * * Authors: * Wu Fengguang <wfg@linux.intel.com> * * This driver 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; either version 2 of the License, or * (at your option) any later version. * * This driver 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> #include <linux/slab.h> #include <sound/core.h> #include <asm/unaligned.h> #include "hda_codec.h" #include "hda_local.h" enum eld_versions { ELD_VER_CEA_861D = 2, ELD_VER_PARTIAL = 31, }; enum cea_edid_versions { CEA_EDID_VER_NONE = 0, CEA_EDID_VER_CEA861 = 1, CEA_EDID_VER_CEA861A = 2, CEA_EDID_VER_CEA861BCD = 3, CEA_EDID_VER_RESERVED = 4, }; static char *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", }; static char *eld_connection_type_names[4] = { "HDMI", "DisplayPort", "2-reserved", "3-reserved" }; enum cea_audio_coding_types { AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0, AUDIO_CODING_TYPE_LPCM = 1, AUDIO_CODING_TYPE_AC3 = 2, AUDIO_CODING_TYPE_MPEG1 = 3, AUDIO_CODING_TYPE_MP3 = 4, AUDIO_CODING_TYPE_MPEG2 = 5, AUDIO_CODING_TYPE_AACLC = 6, AUDIO_CODING_TYPE_DTS = 7, AUDIO_CODING_TYPE_ATRAC = 8, AUDIO_CODING_TYPE_SACD = 9, AUDIO_CODING_TYPE_EAC3 = 10, AUDIO_CODING_TYPE_DTS_HD = 11, AUDIO_CODING_TYPE_MLP = 12, AUDIO_CODING_TYPE_DST = 13, AUDIO_CODING_TYPE_WMAPRO = 14, AUDIO_CODING_TYPE_REF_CXT = 15, /* also include valid xtypes below */ AUDIO_CODING_TYPE_HE_AAC = 15, AUDIO_CODING_TYPE_HE_AAC2 = 16, AUDIO_CODING_TYPE_MPEG_SURROUND = 17, }; enum cea_audio_coding_xtypes { AUDIO_CODING_XTYPE_HE_REF_CT = 0, AUDIO_CODING_XTYPE_HE_AAC = 1, AUDIO_CODING_XTYPE_HE_AAC2 = 2, AUDIO_CODING_XTYPE_MPEG_SURROUND = 3, AUDIO_CODING_XTYPE_FIRST_RESERVED = 4, }; static char *cea_audio_coding_type_names[] = { /* 0 */ "undefined", /* 1 */ "LPCM", /* 2 */ "AC-3", /* 3 */ "MPEG1", /* 4 */ "MP3", /* 5 */ "MPEG2", /* 6 */ "AAC-LC", /* 7 */ "DTS", /* 8 */ "ATRAC", /* 9 */ "DSD (One Bit Audio)", /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)", /* 11 */ "DTS-HD", /* 12 */ "MLP (Dolby TrueHD)", /* 13 */ "DST", /* 14 */ "WMAPro", /* 15 */ "HE-AAC", /* 16 */ "HE-AACv2", /* 17 */ "MPEG Surround", }; /* * The following two lists are shared between * - HDMI audio InfoFrame (source to sink) * - CEA E-EDID Extension (sink to source) */ /* * SS1:SS0 index => sample size */ static int cea_sample_sizes[4] = { 0, /* 0: Refer to Stream Header */ AC_SUPPCM_BITS_16, /* 1: 16 bits */ AC_SUPPCM_BITS_20, /* 2: 20 bits */ AC_SUPPCM_BITS_24, /* 3: 24 bits */ }; /* * SF2:SF1:SF0 index => sampling frequency */ static int cea_sampling_frequencies[8] = { 0, /* 0: Refer to Stream Header */ SNDRV_PCM_RATE_32000, /* 1: 32000Hz */ SNDRV_PCM_RATE_44100, /* 2: 44100Hz */ SNDRV_PCM_RATE_48000, /* 3: 48000Hz */ SNDRV_PCM_RATE_88200, /* 4: 88200Hz */ SNDRV_PCM_RATE_96000, /* 5: 96000Hz */ SNDRV_PCM_RATE_176400, /* 6: 176400Hz */ SNDRV_PCM_RATE_192000, /* 7: 192000Hz */ }; static unsigned char hdmi_get_eld_byte(struct hda_codec *codec, hda_nid_t nid, int byte_index) { unsigned int val; val = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_ELDD, byte_index); #ifdef BE_PARANOID printk(KERN_INFO "HDMI: ELD data byte %d: 0x%x\n", byte_index, val); #endif if ((val & AC_ELDD_ELD_VALID) == 0) { snd_printd(KERN_INFO "HDMI: invalid ELD data byte %d\n", byte_index); val = 0; } return val & AC_ELDD_ELD_DATA; } #define GRAB_BITS(buf, byte, lowbit, bits) \ ({ \ BUILD_BUG_ON(lowbit > 7); \ BUILD_BUG_ON(bits > 8); \ BUILD_BUG_ON(bits <= 0); \ \ (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \ }) static void hdmi_update_short_audio_desc(struct cea_sad *a, const unsigned char *buf) { int i; int val; val = GRAB_BITS(buf, 1, 0, 7); a->rates = 0; for (i = 0; i < 7; i++) if (val & (1 << i)) a->rates |= cea_sampling_frequencies[i + 1]; a->channels = GRAB_BITS(buf, 0, 0, 3); a->channels++; a->sample_bits = 0; a->max_bitrate = 0; a->format = GRAB_BITS(buf, 0, 3, 4); switch (a->format) { case AUDIO_CODING_TYPE_REF_STREAM_HEADER: snd_printd(KERN_INFO "HDMI: audio coding type 0 not expected\n"); break; case AUDIO_CODING_TYPE_LPCM: val = GRAB_BITS(buf, 2, 0, 3); for (i = 0; i < 3; i++) if (val & (1 << i)) a->sample_bits |= cea_sample_sizes[i + 1]; break; case AUDIO_CODING_TYPE_AC3: case AUDIO_CODING_TYPE_MPEG1: case AUDIO_CODING_TYPE_MP3: case AUDIO_CODING_TYPE_MPEG2: case AUDIO_CODING_TYPE_AACLC: case AUDIO_CODING_TYPE_DTS: case AUDIO_CODING_TYPE_ATRAC: a->max_bitrate = GRAB_BITS(buf, 2, 0, 8); a->max_bitrate *= 8000; break; case AUDIO_CODING_TYPE_SACD: break; case AUDIO_CODING_TYPE_EAC3: break; case AUDIO_CODING_TYPE_DTS_HD: break; case AUDIO_CODING_TYPE_MLP: break; case AUDIO_CODING_TYPE_DST: break; case AUDIO_CODING_TYPE_WMAPRO: a->profile = GRAB_BITS(buf, 2, 0, 3); break; case AUDIO_CODING_TYPE_REF_CXT: a->format = GRAB_BITS(buf, 2, 3, 5); if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT || a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) { snd_printd(KERN_INFO "HDMI: audio coding xtype %d not expected\n", a->format); a->format = 0; } else a->format += AUDIO_CODING_TYPE_HE_AAC - AUDIO_CODING_XTYPE_HE_AAC; break; } } /* * Be careful, ELD buf could be totally rubbish! */ static int hdmi_update_eld(struct hdmi_eld *e, const unsigned char *buf, int size) { int mnl; int i; e->eld_ver = GRAB_BITS(buf, 0, 3, 5); if (e->eld_ver != ELD_VER_CEA_861D && e->eld_ver != ELD_VER_PARTIAL) { snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n", e->eld_ver); goto out_fail; } e->eld_size = size; e->baseline_len = GRAB_BITS(buf, 2, 0, 8); mnl = GRAB_BITS(buf, 4, 0, 5); e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3); e->support_hdcp = GRAB_BITS(buf, 5, 0, 1); e->support_ai = GRAB_BITS(buf, 5, 1, 1); e->conn_type = GRAB_BITS(buf, 5, 2, 2); e->sad_count = GRAB_BITS(buf, 5, 4, 4); e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2; e->spk_alloc = GRAB_BITS(buf, 7, 0, 7); e->port_id = get_unaligned_le64(buf + 8); /* not specified, but the spec's tendency is little endian */ e->manufacture_id = get_unaligned_le16(buf + 16); e->product_id = get_unaligned_le16(buf + 18); if (mnl > ELD_MAX_MNL) { snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl); goto out_fail; } else if (ELD_FIXED_BYTES + mnl > size) { snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl); goto out_fail; } else strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl); for (i = 0; i < e->sad_count; i++) { if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) { snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i); goto out_fail; } hdmi_update_short_audio_desc(e->sad + i, buf + ELD_FIXED_BYTES + mnl + 3 * i); } return 0; out_fail: e->eld_ver = 0; return -EINVAL; } static int hdmi_eld_valid(struct hda_codec *codec, hda_nid_t nid) { int eldv; int present; present = snd_hda_pin_sense(codec, nid); eldv = (present & AC_PINSENSE_ELDV); present = (present & AC_PINSENSE_PRESENCE); #ifdef CONFIG_SND_DEBUG_VERBOSE printk(KERN_INFO "HDMI: sink_present = %d, eld_valid = %d\n", !!present, !!eldv); #endif return eldv && present; } int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid) { return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE, AC_DIPSIZE_ELD_BUF); } int snd_hdmi_get_eld(struct hdmi_eld *eld, struct hda_codec *codec, hda_nid_t nid) { int i; int ret; int size; unsigned char *buf; if (!hdmi_eld_valid(codec, nid)) return -ENOENT; size = snd_hdmi_get_eld_size(codec, nid); if (size == 0) { /* wfg: workaround for ASUS P5E-VM HDMI board */ snd_printd(KERN_INFO "HDMI: ELD buf size is 0, force 128\n"); size = 128; } if (size < ELD_FIXED_BYTES || size > PAGE_SIZE) { snd_printd(KERN_INFO "HDMI: invalid ELD buf size %d\n", size); return -ERANGE; } buf = kmalloc(size, GFP_KERNEL); if (!buf) return -ENOMEM; for (i = 0; i < size; i++) buf[i] = hdmi_get_eld_byte(codec, nid, i); ret = hdmi_update_eld(eld, buf, size); kfree(buf); return ret; } static void hdmi_show_short_audio_desc(struct cea_sad *a) { char buf[SND_PRINT_RATES_ADVISED_BUFSIZE]; char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits ="; if (!a->format) return; snd_print_pcm_rates(a->rates, buf, sizeof(buf)); if (a->format == AUDIO_CODING_TYPE_LPCM) snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8); else if (a->max_bitrate) snprintf(buf2, sizeof(buf2), ", max bitrate = %d", a->max_bitrate); else buf2[0] = '\0'; printk(KERN_INFO "HDMI: supports coding type %s:" " channels = %d, rates =%s%s\n", cea_audio_coding_type_names[a->format], a->channels, buf, buf2); } void snd_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 */ } void snd_hdmi_show_eld(struct hdmi_eld *e) { int i; printk(KERN_INFO "HDMI: detected monitor %s at connection type %s\n", e->monitor_name, eld_connection_type_names[e->conn_type]); if (e->spk_alloc) { char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf)); printk(KERN_INFO "HDMI: available speakers:%s\n", buf); } for (i = 0; i < e->sad_count; i++) hdmi_show_short_audio_desc(e->sad + i); } #ifdef CONFIG_PROC_FS static void hdmi_print_sad_info(int i, struct cea_sad *a, struct snd_info_buffer *buffer) { char buf[SND_PRINT_RATES_ADVISED_BUFSIZE]; snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n", i, a->format, cea_audio_coding_type_names[a->format]); snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels); snd_print_pcm_rates(a->rates, buf, sizeof(buf)); snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf); if (a->format == AUDIO_CODING_TYPE_LPCM) { snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf)); snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n", i, a->sample_bits, buf); } if (a->max_bitrate) snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n", i, a->max_bitrate); if (a->profile) snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile); } static void hdmi_print_eld_info(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { struct hdmi_eld *e = entry->private_data; char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; int i; static char *eld_versoin_names[32] = { "reserved", "reserved", "CEA-861D or below", [3 ... 30] = "reserved", [31] = "partial" }; static char *cea_edid_version_names[8] = { "no CEA EDID Timing Extension block present", "CEA-861", "CEA-861-A", "CEA-861-B, C or D", [4 ... 7] = "reserved" }; snd_iprintf(buffer, "monitor_present\t\t%d\n", e->monitor_present); snd_iprintf(buffer, "eld_valid\t\t%d\n", e->eld_valid); snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name); snd_iprintf(buffer, "connection_type\t\t%s\n", eld_connection_type_names[e->conn_type]); snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver, eld_versoin_names[e->eld_ver]); snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver, cea_edid_version_names[e->cea_edid_ver]); snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id); snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id); snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id); snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp); snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai); snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay); snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf)); snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf); snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count); for (i = 0; i < e->sad_count; i++) hdmi_print_sad_info(i, e->sad + i, buffer); } static void hdmi_write_eld_info(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { struct hdmi_eld *e = entry->private_data; char line[64]; char name[64]; char *sname; long long val; unsigned int n; while (!snd_info_get_line(buffer, line, sizeof(line))) { if (sscanf(line, "%s %llx", name, &val) != 2) continue; /* * We don't allow modification to these fields: * monitor_name manufacture_id product_id * eld_version edid_version */ if (!strcmp(name, "monitor_present")) e->monitor_present = val; else if (!strcmp(name, "eld_valid")) e->eld_valid = val; else if (!strcmp(name, "connection_type")) e->conn_type = val; else if (!strcmp(name, "port_id")) e->port_id = val; else if (!strcmp(name, "support_hdcp")) e->support_hdcp = val; else if (!strcmp(name, "support_ai")) e->support_ai = val; else if (!strcmp(name, "audio_sync_delay")) e->aud_synch_delay = val; else if (!strcmp(name, "speakers")) e->spk_alloc = val; else if (!strcmp(name, "sad_count")) e->sad_count = val; else if (!strncmp(name, "sad", 3)) { sname = name + 4; n = name[3] - '0'; if (name[4] >= '0' && name[4] <= '9') { sname++; n = 10 * n + name[4] - '0'; } if (n >= ELD_MAX_SAD) continue; if (!strcmp(sname, "_coding_type")) e->sad[n].format = val; else if (!strcmp(sname, "_channels")) e->sad[n].channels = val; else if (!strcmp(sname, "_rates")) e->sad[n].rates = val; else if (!strcmp(sname, "_bits")) e->sad[n].sample_bits = val; else if (!strcmp(sname, "_max_bitrate")) e->sad[n].max_bitrate = val; else if (!strcmp(sname, "_profile")) e->sad[n].profile = val; if (n >= e->sad_count) e->sad_count = n + 1; } } } int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld, int index) { char name[32]; struct snd_info_entry *entry; int err; snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index); err = snd_card_proc_new(codec->bus->card, name, &entry); if (err < 0) return err; snd_info_set_text_ops(entry, eld, hdmi_print_eld_info); entry->c.text.write = hdmi_write_eld_info; entry->mode |= S_IWUSR; eld->proc_entry = entry; return 0; } void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld) { if (!codec->bus->shutdown && eld->proc_entry) { snd_device_free(codec->bus->card, eld->proc_entry); eld->proc_entry = NULL; } } #endif /* CONFIG_PROC_FS */ /* update PCM info based on ELD */ void hdmi_eld_update_pcm_info(struct hdmi_eld *eld, struct hda_pcm_stream *pcm, struct hda_pcm_stream *codec_pars) { int i; /* assume basic audio support (the basic audio flag is not in ELD; * however, all audio capable sinks are required to support basic * audio) */ pcm->rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000; pcm->formats = SNDRV_PCM_FMTBIT_S16_LE; pcm->maxbps = 16; pcm->channels_max = 2; for (i = 0; i < eld->sad_count; i++) { struct cea_sad *a = &eld->sad[i]; pcm->rates |= a->rates; if (a->channels > pcm->channels_max) pcm->channels_max = a->channels; if (a->format == AUDIO_CODING_TYPE_LPCM) { if (a->sample_bits & AC_SUPPCM_BITS_20) { pcm->formats |= SNDRV_PCM_FMTBIT_S32_LE; if (pcm->maxbps < 20) pcm->maxbps = 20; } if (a->sample_bits & AC_SUPPCM_BITS_24) { pcm->formats |= SNDRV_PCM_FMTBIT_S32_LE; if (pcm->maxbps < 24) pcm->maxbps = 24; } } } if (!codec_pars) return; /* restrict the parameters by the values the codec provides */ pcm->rates &= codec_pars->rates; pcm->formats &= codec_pars->formats; pcm->channels_max = min(pcm->channels_max, codec_pars->channels_max); pcm->maxbps = min(pcm->maxbps, codec_pars->maxbps); }