| /* |
| * 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 <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, |
| }; |
| |
| static char *eld_versoin_names[32] = { |
| "reserved", |
| "reserved", |
| "CEA-861D or below", |
| [3 ... 30] = "reserved", |
| [31] = "partial" |
| }; |
| |
| 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_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" |
| }; |
| |
| 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", |
| "Display Port", |
| "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->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); |
| a->sample_bits = 0; |
| 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_present_sense(struct hda_codec *codec, hda_nid_t nid) |
| { |
| return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_PIN_SENSE, 0); |
| } |
| |
| static int hdmi_eld_valid(struct hda_codec *codec, hda_nid_t nid) |
| { |
| int eldv; |
| int present; |
| |
| present = hdmi_present_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; |
| |
| 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_item(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; |
| int n; |
| |
| while (!snd_info_get_line(buffer, line, sizeof(line))) { |
| if (sscanf(line, "%s %llx", name, &val) != 2) |
| continue; |
| 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 < 0 || n > 31) /* double the CEA limit */ |
| 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; |
| if (n >= e->sad_count) |
| e->sad_count = n + 1; |
| } |
| } |
| } |
| |
| |
| int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld) |
| { |
| char name[32]; |
| struct snd_info_entry *entry; |
| int err; |
| |
| snprintf(name, sizeof(name), "eld#%d", codec->addr); |
| 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_item; |
| 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 */ |