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Diffstat (limited to 'sound/pci/hda/hda_eld.c')
-rw-r--r--sound/pci/hda/hda_eld.c590
1 files changed, 590 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
new file mode 100644
index 00000000000..fcad5ec3177
--- /dev/null
+++ b/sound/pci/hda/hda_eld.c
@@ -0,0 +1,590 @@
+/*
+ * 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,
+};
+
+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->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;
+ 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_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;
+ 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, "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;
+ 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)
+{
+ 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_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 */
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