[linux-2.6-block.git] / sound / pci / hda / hda_eld.c

/*
 * 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 */
Commit	Line	Data
7f4a9f43 WF	1	/*
	2	* Generic routines and proc interface for ELD(EDID Like Data) information
	3	*
	4	* Copyright(c) 2008 Intel Corporation.
	5	*
	6	* Authors:
	7	* Wu Fengguang <wfg@linux.intel.com>
	8	*
	9	* This driver is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This driver is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23
	24	#include <linux/init.h>
	25	#include <sound/core.h>
	26	#include <asm/unaligned.h>
	27	#include "hda_codec.h"
	28	#include "hda_local.h"
	29
	30	enum eld_versions {
	31	ELD_VER_CEA_861D = 2,
	32	ELD_VER_PARTIAL = 31,
	33	};
	34
7f4a9f43 WF	35	enum cea_edid_versions {
	36	CEA_EDID_VER_NONE = 0,
	37	CEA_EDID_VER_CEA861 = 1,
	38	CEA_EDID_VER_CEA861A = 2,
	39	CEA_EDID_VER_CEA861BCD = 3,
	40	CEA_EDID_VER_RESERVED = 4,
	41	};
	42
7f4a9f43 WF	43	static char *cea_speaker_allocation_names[] = {
	44	/* 0 */ "FL/FR",
	45	/* 1 */ "LFE",
	46	/* 2 */ "FC",
	47	/* 3 */ "RL/RR",
	48	/* 4 */ "RC",
	49	/* 5 */ "FLC/FRC",
	50	/* 6 */ "RLC/RRC",
	51	/* 7 */ "FLW/FRW",
	52	/* 8 */ "FLH/FRH",
	53	/* 9 */ "TC",
	54	/* 10 */ "FCH",
	55	};
	56
	57	static char *eld_connection_type_names[4] = {
	58	"HDMI",
9415e1c4	59	"DisplayPort",
7f4a9f43 WF	60	"2-reserved",
	61	"3-reserved"
	62	};
	63
	64	enum cea_audio_coding_types {
	65	AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
	66	AUDIO_CODING_TYPE_LPCM = 1,
	67	AUDIO_CODING_TYPE_AC3 = 2,
	68	AUDIO_CODING_TYPE_MPEG1 = 3,
	69	AUDIO_CODING_TYPE_MP3 = 4,
	70	AUDIO_CODING_TYPE_MPEG2 = 5,
	71	AUDIO_CODING_TYPE_AACLC = 6,
	72	AUDIO_CODING_TYPE_DTS = 7,
	73	AUDIO_CODING_TYPE_ATRAC = 8,
	74	AUDIO_CODING_TYPE_SACD = 9,
	75	AUDIO_CODING_TYPE_EAC3 = 10,
	76	AUDIO_CODING_TYPE_DTS_HD = 11,
	77	AUDIO_CODING_TYPE_MLP = 12,
	78	AUDIO_CODING_TYPE_DST = 13,
	79	AUDIO_CODING_TYPE_WMAPRO = 14,
	80	AUDIO_CODING_TYPE_REF_CXT = 15,
	81	/* also include valid xtypes below */
	82	AUDIO_CODING_TYPE_HE_AAC = 15,
	83	AUDIO_CODING_TYPE_HE_AAC2 = 16,
	84	AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
	85	};
	86
	87	enum cea_audio_coding_xtypes {
	88	AUDIO_CODING_XTYPE_HE_REF_CT = 0,
	89	AUDIO_CODING_XTYPE_HE_AAC = 1,
	90	AUDIO_CODING_XTYPE_HE_AAC2 = 2,
	91	AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
	92	AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
	93	};
	94
	95	static char *cea_audio_coding_type_names[] = {
	96	/* 0 */ "undefined",
	97	/* 1 */ "LPCM",
	98	/* 2 */ "AC-3",
	99	/* 3 */ "MPEG1",
	100	/* 4 */ "MP3",
	101	/* 5 */ "MPEG2",
	102	/* 6 */ "AAC-LC",
	103	/* 7 */ "DTS",
	104	/* 8 */ "ATRAC",
06f69d17	105	/* 9 */ "DSD (One Bit Audio)",
7f4a9f43 WF	106	/* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
	107	/* 11 */ "DTS-HD",
	108	/* 12 */ "MLP (Dolby TrueHD)",
	109	/* 13 */ "DST",
	110	/* 14 */ "WMAPro",
	111	/* 15 */ "HE-AAC",
	112	/* 16 */ "HE-AACv2",
	113	/* 17 */ "MPEG Surround",
	114	};
	115
	116	/*
	117	* The following two lists are shared between
	118	* - HDMI audio InfoFrame (source to sink)
4e19c58f	119	* - CEA E-EDID Extension (sink to source)
7f4a9f43 WF	120	*/
	121
	122	/*
	123	* SS1:SS0 index => sample size
	124	*/
	125	static int cea_sample_sizes[4] = {
	126	0, /* 0: Refer to Stream Header */
	127	AC_SUPPCM_BITS_16, /* 1: 16 bits */
	128	AC_SUPPCM_BITS_20, /* 2: 20 bits */
	129	AC_SUPPCM_BITS_24, /* 3: 24 bits */
	130	};
	131
	132	/*
	133	* SF2:SF1:SF0 index => sampling frequency
	134	*/
	135	static int cea_sampling_frequencies[8] = {
	136	0, /* 0: Refer to Stream Header */
	137	SNDRV_PCM_RATE_32000, /* 1: 32000Hz */
	138	SNDRV_PCM_RATE_44100, /* 2: 44100Hz */
	139	SNDRV_PCM_RATE_48000, /* 3: 48000Hz */
	140	SNDRV_PCM_RATE_88200, /* 4: 88200Hz */
	141	SNDRV_PCM_RATE_96000, /* 5: 96000Hz */
	142	SNDRV_PCM_RATE_176400, /* 6: 176400Hz */
	143	SNDRV_PCM_RATE_192000, /* 7: 192000Hz */
	144	};
	145
	146	static unsigned char hdmi_get_eld_byte(struct hda_codec *codec, hda_nid_t nid,
	147	int byte_index)
	148	{
	149	unsigned int val;
	150
	151	val = snd_hda_codec_read(codec, nid, 0,
	152	AC_VERB_GET_HDMI_ELDD, byte_index);
	153
	154	#ifdef BE_PARANOID
03284c8f	155	printk(KERN_INFO "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
7f4a9f43 WF	156	#endif
	157
	158	if ((val & AC_ELDD_ELD_VALID) == 0) {
03284c8f	159	snd_printd(KERN_INFO "HDMI: invalid ELD data byte %d\n",
7f4a9f43 WF	160	byte_index);
	161	val = 0;
	162	}
	163
	164	return val & AC_ELDD_ELD_DATA;
	165	}
	166
	167	#define GRAB_BITS(buf, byte, lowbit, bits) \
	168	({ \
	169	BUILD_BUG_ON(lowbit > 7); \
	170	BUILD_BUG_ON(bits > 8); \
	171	BUILD_BUG_ON(bits <= 0); \
	172	\
	173	(buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \
	174	})
	175
	176	static void hdmi_update_short_audio_desc(struct cea_sad *a,
	177	const unsigned char *buf)
	178	{
	179	int i;
	180	int val;
	181
	182	val = GRAB_BITS(buf, 1, 0, 7);
	183	a->rates = 0;
	184	for (i = 0; i < 7; i++)
	185	if (val & (1 << i))
	186	a->rates \|= cea_sampling_frequencies[i + 1];
	187
	188	a->channels = GRAB_BITS(buf, 0, 0, 3);
	189	a->channels++;
	190
	191	a->format = GRAB_BITS(buf, 0, 3, 4);
	192	switch (a->format) {
	193	case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
	194	snd_printd(KERN_INFO
03284c8f	195	"HDMI: audio coding type 0 not expected\n");
7f4a9f43 WF	196	break;
	197
	198	case AUDIO_CODING_TYPE_LPCM:
	199	val = GRAB_BITS(buf, 2, 0, 3);
	200	a->sample_bits = 0;
	201	for (i = 0; i < 3; i++)
	202	if (val & (1 << i))
	203	a->sample_bits \|= cea_sample_sizes[i + 1];
	204	break;
	205
	206	case AUDIO_CODING_TYPE_AC3:
	207	case AUDIO_CODING_TYPE_MPEG1:
	208	case AUDIO_CODING_TYPE_MP3:
	209	case AUDIO_CODING_TYPE_MPEG2:
	210	case AUDIO_CODING_TYPE_AACLC:
	211	case AUDIO_CODING_TYPE_DTS:
	212	case AUDIO_CODING_TYPE_ATRAC:
	213	a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
	214	a->max_bitrate *= 8000;
	215	break;
	216
	217	case AUDIO_CODING_TYPE_SACD:
	218	break;
	219
	220	case AUDIO_CODING_TYPE_EAC3:
	221	break;
	222
	223	case AUDIO_CODING_TYPE_DTS_HD:
	224	break;
	225
	226	case AUDIO_CODING_TYPE_MLP:
	227	break;
	228
	229	case AUDIO_CODING_TYPE_DST:
	230	break;
	231
	232	case AUDIO_CODING_TYPE_WMAPRO:
	233	a->profile = GRAB_BITS(buf, 2, 0, 3);
	234	break;
	235
	236	case AUDIO_CODING_TYPE_REF_CXT:
	237	a->format = GRAB_BITS(buf, 2, 3, 5);
	238	if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT \|\|
	239	a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
	240	snd_printd(KERN_INFO
03284c8f	241	"HDMI: audio coding xtype %d not expected\n",
7f4a9f43 WF	242	a->format);
	243	a->format = 0;
	244	} else
	245	a->format += AUDIO_CODING_TYPE_HE_AAC -
	246	AUDIO_CODING_XTYPE_HE_AAC;
	247	break;
	248	}
	249	}
	250
	251	/*
	252	* Be careful, ELD buf could be totally rubbish!
	253	*/
5b87ebb7 WF	254	static int hdmi_update_eld(struct hdmi_eld *e,
5b87ebb7 WF	255	const unsigned char *buf, int size)
7f4a9f43 WF	256	{
	257	int mnl;
	258	int i;
	259
	260	e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
	261	if (e->eld_ver != ELD_VER_CEA_861D &&
	262	e->eld_ver != ELD_VER_PARTIAL) {
03284c8f WF	263	snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
03284c8f WF	264	e->eld_ver);
7f4a9f43 WF	265	goto out_fail;
	266	}
	267
	268	e->eld_size = size;
	269	e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
	270	mnl = GRAB_BITS(buf, 4, 0, 5);
	271	e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
	272
	273	e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
	274	e->support_ai = GRAB_BITS(buf, 5, 1, 1);
	275	e->conn_type = GRAB_BITS(buf, 5, 2, 2);
	276	e->sad_count = GRAB_BITS(buf, 5, 4, 4);
	277
	278	e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
	279	e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
	280
	281	e->port_id = get_unaligned_le64(buf + 8);
	282
	283	/* not specified, but the spec's tendency is little endian */
	284	e->manufacture_id = get_unaligned_le16(buf + 16);
	285	e->product_id = get_unaligned_le16(buf + 18);
	286
	287	if (mnl > ELD_MAX_MNL) {
03284c8f	288	snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl);
7f4a9f43 WF	289	goto out_fail;
7f4a9f43 WF	290	} else if (ELD_FIXED_BYTES + mnl > size) {
03284c8f	291	snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl);
7f4a9f43 WF	292	goto out_fail;
	293	} else
	294	strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl);
	295
	296	for (i = 0; i < e->sad_count; i++) {
	297	if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
03284c8f	298	snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
7f4a9f43 WF	299	goto out_fail;
	300	}
	301	hdmi_update_short_audio_desc(e->sad + i,
	302	buf + ELD_FIXED_BYTES + mnl + 3 * i);
	303	}
	304
	305	return 0;
	306
	307	out_fail:
	308	e->eld_ver = 0;
	309	return -EINVAL;
	310	}
	311
	312	static int hdmi_present_sense(struct hda_codec *codec, hda_nid_t nid)
	313	{
	314	return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_PIN_SENSE, 0);
	315	}
	316
	317	static int hdmi_eld_valid(struct hda_codec *codec, hda_nid_t nid)
	318	{
	319	int eldv;
	320	int present;
	321
	322	present = hdmi_present_sense(codec, nid);
	323	eldv = (present & AC_PINSENSE_ELDV);
	324	present = (present & AC_PINSENSE_PRESENCE);
	325
	326	#ifdef CONFIG_SND_DEBUG_VERBOSE
03284c8f WF	327	printk(KERN_INFO "HDMI: sink_present = %d, eld_valid = %d\n",
03284c8f WF	328	!!present, !!eldv);
7f4a9f43 WF	329	#endif
	330
	331	return eldv && present;
	332	}
	333
	334	int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
	335	{
	336	return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
	337	AC_DIPSIZE_ELD_BUF);
	338	}
	339
5b87ebb7	340	int snd_hdmi_get_eld(struct hdmi_eld *eld,
7f4a9f43 WF	341	struct hda_codec *codec, hda_nid_t nid)
	342	{
	343	int i;
	344	int ret;
	345	int size;
	346	unsigned char *buf;
	347
	348	if (!hdmi_eld_valid(codec, nid))
	349	return -ENOENT;
	350
	351	size = snd_hdmi_get_eld_size(codec, nid);
	352	if (size == 0) {
	353	/* wfg: workaround for ASUS P5E-VM HDMI board */
03284c8f	354	snd_printd(KERN_INFO "HDMI: ELD buf size is 0, force 128\n");
7f4a9f43 WF	355	size = 128;
	356	}
	357	if (size < ELD_FIXED_BYTES \|\| size > PAGE_SIZE) {
03284c8f	358	snd_printd(KERN_INFO "HDMI: invalid ELD buf size %d\n", size);
7f4a9f43 WF	359	return -ERANGE;
	360	}
	361
	362	buf = kmalloc(size, GFP_KERNEL);
	363	if (!buf)
	364	return -ENOMEM;
	365
	366	for (i = 0; i < size; i++)
	367	buf[i] = hdmi_get_eld_byte(codec, nid, i);
	368
5b87ebb7	369	ret = hdmi_update_eld(eld, buf, size);
7f4a9f43 WF	370
	371	kfree(buf);
	372	return ret;
	373	}
	374
	375	static void hdmi_show_short_audio_desc(struct cea_sad *a)
	376	{
	377	char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
ae8cb4ca	378	char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
7f4a9f43	379
ae8cb4ca WF	380	if (!a->format)
ae8cb4ca WF	381	return;
7f4a9f43 WF	382
7f4a9f43 WF	383	snd_print_pcm_rates(a->rates, buf, sizeof(buf));
7f4a9f43 WF	384
7f4a9f43 WF	385	if (a->format == AUDIO_CODING_TYPE_LPCM)
218b5ffc	386	snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2 - 8));
ae8cb4ca WF	387	else if (a->max_bitrate)
	388	snprintf(buf2, sizeof(buf2),
	389	", max bitrate = %d", a->max_bitrate);
	390	else
	391	buf2[0] = '\0';
	392
03284c8f	393	printk(KERN_INFO "HDMI: supports coding type %s:"
ae8cb4ca WF	394	" channels = %d, rates =%s%s\n",
	395	cea_audio_coding_type_names[a->format],
	396	a->channels,
	397	buf,
	398	buf2);
7f4a9f43 WF	399	}
7f4a9f43 WF	400
903b21d8	401	void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
7f4a9f43 WF	402	{
	403	int i, j;
	404
	405	for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
	406	if (spk_alloc & (1 << i))
06f69d17	407	j += snprintf(buf + j, buflen - j, " %s",
7f4a9f43 WF	408	cea_speaker_allocation_names[i]);
7f4a9f43 WF	409	}
7f4a9f43 WF	410	buf[j] = '\0'; /* necessary when j == 0 */
	411	}
	412
5b87ebb7	413	void snd_hdmi_show_eld(struct hdmi_eld *e)
7f4a9f43 WF	414	{
7f4a9f43 WF	415	int i;
ae8cb4ca	416
03284c8f	417	printk(KERN_INFO "HDMI: detected monitor %s at connection type %s\n",
ae8cb4ca WF	418	e->monitor_name,
	419	eld_connection_type_names[e->conn_type]);
	420
	421	if (e->spk_alloc) {
	422	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
	423	snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
03284c8f	424	printk(KERN_INFO "HDMI: available speakers:%s\n", buf);
ae8cb4ca	425	}
7f4a9f43 WF	426
	427	for (i = 0; i < e->sad_count; i++)
	428	hdmi_show_short_audio_desc(e->sad + i);
	429	}
5f1e71b1 WF	430
	431	#ifdef CONFIG_PROC_FS
	432
	433	static void hdmi_print_sad_info(int i, struct cea_sad *a,
	434	struct snd_info_buffer *buffer)
	435	{
d39b4352	436	char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
5f1e71b1 WF	437
	438	snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
	439	i, a->format, cea_audio_coding_type_names[a->format]);
	440	snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
	441
	442	snd_print_pcm_rates(a->rates, buf, sizeof(buf));
06f69d17	443	snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
5f1e71b1	444
d39b4352 WF	445	if (a->format == AUDIO_CODING_TYPE_LPCM) {
	446	snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
	447	snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
	448	i, a->sample_bits, buf);
	449	}
5f1e71b1 WF	450
	451	if (a->max_bitrate)
	452	snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
	453	i, a->max_bitrate);
	454
	455	if (a->profile)
	456	snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
	457	}
	458
	459	static void hdmi_print_eld_info(struct snd_info_entry *entry,
	460	struct snd_info_buffer *buffer)
	461	{
5b87ebb7	462	struct hdmi_eld *e = entry->private_data;
903b21d8	463	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
5f1e71b1	464	int i;
4805286b WF	465	static char *eld_versoin_names[32] = {
	466	"reserved",
	467	"reserved",
	468	"CEA-861D or below",
	469	[3 ... 30] = "reserved",
	470	[31] = "partial"
	471	};
	472	static char *cea_edid_version_names[8] = {
	473	"no CEA EDID Timing Extension block present",
	474	"CEA-861",
	475	"CEA-861-A",
	476	"CEA-861-B, C or D",
	477	[4 ... 7] = "reserved"
	478	};
5f1e71b1	479
db742104	480	snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
5f1e71b1 WF	481	snd_iprintf(buffer, "connection_type\t\t%s\n",
	482	eld_connection_type_names[e->conn_type]);
	483	snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
	484	eld_versoin_names[e->eld_ver]);
	485	snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
	486	cea_edid_version_names[e->cea_edid_ver]);
	487	snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
	488	snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
	489	snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
	490	snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
	491	snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
	492	snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
	493
903b21d8	494	snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
06f69d17	495	snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
5f1e71b1 WF	496
	497	snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
	498
	499	for (i = 0; i < e->sad_count; i++)
	500	hdmi_print_sad_info(i, e->sad + i, buffer);
	501	}
	502
acb05993	503	static void hdmi_write_eld_info(struct snd_info_entry *entry,
acdda791 WF	504	struct snd_info_buffer *buffer)
	505	{
	506	struct hdmi_eld *e = entry->private_data;
	507	char line[64];
	508	char name[64];
	509	char *sname;
	510	long long val;
	511	int n;
	512
	513	while (!snd_info_get_line(buffer, line, sizeof(line))) {
	514	if (sscanf(line, "%s %llx", name, &val) != 2)
	515	continue;
acb05993 WF	516	/*
	517	* We don't allow modification to these fields:
	518	* monitor_name manufacture_id product_id
	519	* eld_version edid_version
	520	*/
acdda791 WF	521	if (!strcmp(name, "connection_type"))
	522	e->conn_type = val;
	523	else if (!strcmp(name, "port_id"))
	524	e->port_id = val;
	525	else if (!strcmp(name, "support_hdcp"))
	526	e->support_hdcp = val;
	527	else if (!strcmp(name, "support_ai"))
	528	e->support_ai = val;
	529	else if (!strcmp(name, "audio_sync_delay"))
	530	e->aud_synch_delay = val;
	531	else if (!strcmp(name, "speakers"))
	532	e->spk_alloc = val;
	533	else if (!strcmp(name, "sad_count"))
	534	e->sad_count = val;
	535	else if (!strncmp(name, "sad", 3)) {
	536	sname = name + 4;
	537	n = name[3] - '0';
	538	if (name[4] >= '0' && name[4] <= '9') {
	539	sname++;
	540	n = 10 * n + name[4] - '0';
	541	}
	542	if (n < 0 \|\| n > 31) /* double the CEA limit */
	543	continue;
	544	if (!strcmp(sname, "_coding_type"))
	545	e->sad[n].format = val;
	546	else if (!strcmp(sname, "_channels"))
	547	e->sad[n].channels = val;
	548	else if (!strcmp(sname, "_rates"))
	549	e->sad[n].rates = val;
	550	else if (!strcmp(sname, "_bits"))
	551	e->sad[n].sample_bits = val;
	552	else if (!strcmp(sname, "_max_bitrate"))
	553	e->sad[n].max_bitrate = val;
acb05993 WF	554	else if (!strcmp(sname, "_profile"))
acb05993 WF	555	e->sad[n].profile = val;
acdda791 WF	556	if (n >= e->sad_count)
	557	e->sad_count = n + 1;
	558	}
	559	}
	560	}
	561
	562
5b87ebb7	563	int snd_hda_eld_proc_new(struct hda_codec codec, struct hdmi_eld eld)
5f1e71b1 WF	564	{
	565	char name[32];
	566	struct snd_info_entry *entry;
	567	int err;
	568
	569	snprintf(name, sizeof(name), "eld#%d", codec->addr);
	570	err = snd_card_proc_new(codec->bus->card, name, &entry);
	571	if (err < 0)
	572	return err;
	573
	574	snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
acb05993	575	entry->c.text.write = hdmi_write_eld_info;
acdda791	576	entry->mode \|= S_IWUSR;
f208dba9	577	eld->proc_entry = entry;
acdda791	578
5f1e71b1 WF	579	return 0;
	580	}
	581
f208dba9 TI	582	void snd_hda_eld_proc_free(struct hda_codec codec, struct hdmi_eld eld)
	583	{
	584	if (!codec->bus->shutdown && eld->proc_entry) {
	585	snd_device_free(codec->bus->card, eld->proc_entry);
	586	eld->proc_entry = NULL;
	587	}
	588	}
	589
	590	#endif /* CONFIG_PROC_FS */