[deliverable/linux.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 <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;
}

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 (!eld->eld_valid)
		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);
	if (!e->eld_valid)
		return;
	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);
}
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>
5a0e3ad6	25	#include <linux/slab.h>
7f4a9f43 WF	26	#include <sound/core.h>
	27	#include <asm/unaligned.h>
	28	#include "hda_codec.h"
	29	#include "hda_local.h"
	30
	31	enum eld_versions {
	32	ELD_VER_CEA_861D = 2,
	33	ELD_VER_PARTIAL = 31,
	34	};
	35
7f4a9f43 WF	36	enum cea_edid_versions {
	37	CEA_EDID_VER_NONE = 0,
	38	CEA_EDID_VER_CEA861 = 1,
	39	CEA_EDID_VER_CEA861A = 2,
	40	CEA_EDID_VER_CEA861BCD = 3,
	41	CEA_EDID_VER_RESERVED = 4,
	42	};
	43
7f4a9f43 WF	44	static char *cea_speaker_allocation_names[] = {
	45	/* 0 */ "FL/FR",
	46	/* 1 */ "LFE",
	47	/* 2 */ "FC",
	48	/* 3 */ "RL/RR",
	49	/* 4 */ "RC",
	50	/* 5 */ "FLC/FRC",
	51	/* 6 */ "RLC/RRC",
	52	/* 7 */ "FLW/FRW",
	53	/* 8 */ "FLH/FRH",
	54	/* 9 */ "TC",
	55	/* 10 */ "FCH",
	56	};
	57
	58	static char *eld_connection_type_names[4] = {
	59	"HDMI",
9415e1c4	60	"DisplayPort",
7f4a9f43 WF	61	"2-reserved",
	62	"3-reserved"
	63	};
	64
	65	enum cea_audio_coding_types {
	66	AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
	67	AUDIO_CODING_TYPE_LPCM = 1,
	68	AUDIO_CODING_TYPE_AC3 = 2,
	69	AUDIO_CODING_TYPE_MPEG1 = 3,
	70	AUDIO_CODING_TYPE_MP3 = 4,
	71	AUDIO_CODING_TYPE_MPEG2 = 5,
	72	AUDIO_CODING_TYPE_AACLC = 6,
	73	AUDIO_CODING_TYPE_DTS = 7,
	74	AUDIO_CODING_TYPE_ATRAC = 8,
	75	AUDIO_CODING_TYPE_SACD = 9,
	76	AUDIO_CODING_TYPE_EAC3 = 10,
	77	AUDIO_CODING_TYPE_DTS_HD = 11,
	78	AUDIO_CODING_TYPE_MLP = 12,
	79	AUDIO_CODING_TYPE_DST = 13,
	80	AUDIO_CODING_TYPE_WMAPRO = 14,
	81	AUDIO_CODING_TYPE_REF_CXT = 15,
	82	/* also include valid xtypes below */
	83	AUDIO_CODING_TYPE_HE_AAC = 15,
	84	AUDIO_CODING_TYPE_HE_AAC2 = 16,
	85	AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
	86	};
	87
	88	enum cea_audio_coding_xtypes {
	89	AUDIO_CODING_XTYPE_HE_REF_CT = 0,
	90	AUDIO_CODING_XTYPE_HE_AAC = 1,
	91	AUDIO_CODING_XTYPE_HE_AAC2 = 2,
	92	AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
	93	AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
	94	};
	95
	96	static char *cea_audio_coding_type_names[] = {
	97	/* 0 */ "undefined",
	98	/* 1 */ "LPCM",
	99	/* 2 */ "AC-3",
	100	/* 3 */ "MPEG1",
	101	/* 4 */ "MP3",
	102	/* 5 */ "MPEG2",
	103	/* 6 */ "AAC-LC",
	104	/* 7 */ "DTS",
	105	/* 8 */ "ATRAC",
06f69d17	106	/* 9 */ "DSD (One Bit Audio)",
7f4a9f43 WF	107	/* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
	108	/* 11 */ "DTS-HD",
	109	/* 12 */ "MLP (Dolby TrueHD)",
	110	/* 13 */ "DST",
	111	/* 14 */ "WMAPro",
	112	/* 15 */ "HE-AAC",
	113	/* 16 */ "HE-AACv2",
	114	/* 17 */ "MPEG Surround",
	115	};
	116
	117	/*
	118	* The following two lists are shared between
	119	* - HDMI audio InfoFrame (source to sink)
4e19c58f	120	* - CEA E-EDID Extension (sink to source)
7f4a9f43 WF	121	*/
	122
	123	/*
	124	* SS1:SS0 index => sample size
	125	*/
	126	static int cea_sample_sizes[4] = {
	127	0, /* 0: Refer to Stream Header */
	128	AC_SUPPCM_BITS_16, /* 1: 16 bits */
	129	AC_SUPPCM_BITS_20, /* 2: 20 bits */
	130	AC_SUPPCM_BITS_24, /* 3: 24 bits */
	131	};
	132
	133	/*
	134	* SF2:SF1:SF0 index => sampling frequency
	135	*/
	136	static int cea_sampling_frequencies[8] = {
	137	0, /* 0: Refer to Stream Header */
	138	SNDRV_PCM_RATE_32000, /* 1: 32000Hz */
	139	SNDRV_PCM_RATE_44100, /* 2: 44100Hz */
	140	SNDRV_PCM_RATE_48000, /* 3: 48000Hz */
	141	SNDRV_PCM_RATE_88200, /* 4: 88200Hz */
	142	SNDRV_PCM_RATE_96000, /* 5: 96000Hz */
	143	SNDRV_PCM_RATE_176400, /* 6: 176400Hz */
	144	SNDRV_PCM_RATE_192000, /* 7: 192000Hz */
	145	};
	146
	147	static unsigned char hdmi_get_eld_byte(struct hda_codec *codec, hda_nid_t nid,
	148	int byte_index)
	149	{
	150	unsigned int val;
	151
	152	val = snd_hda_codec_read(codec, nid, 0,
	153	AC_VERB_GET_HDMI_ELDD, byte_index);
	154
	155	#ifdef BE_PARANOID
03284c8f	156	printk(KERN_INFO "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
7f4a9f43 WF	157	#endif
	158
	159	if ((val & AC_ELDD_ELD_VALID) == 0) {
03284c8f	160	snd_printd(KERN_INFO "HDMI: invalid ELD data byte %d\n",
7f4a9f43 WF	161	byte_index);
	162	val = 0;
	163	}
	164
	165	return val & AC_ELDD_ELD_DATA;
	166	}
	167
	168	#define GRAB_BITS(buf, byte, lowbit, bits) \
	169	({ \
	170	BUILD_BUG_ON(lowbit > 7); \
	171	BUILD_BUG_ON(bits > 8); \
	172	BUILD_BUG_ON(bits <= 0); \
	173	\
	174	(buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \
	175	})
	176
	177	static void hdmi_update_short_audio_desc(struct cea_sad *a,
	178	const unsigned char *buf)
	179	{
	180	int i;
	181	int val;
	182
	183	val = GRAB_BITS(buf, 1, 0, 7);
	184	a->rates = 0;
	185	for (i = 0; i < 7; i++)
	186	if (val & (1 << i))
	187	a->rates \|= cea_sampling_frequencies[i + 1];
	188
	189	a->channels = GRAB_BITS(buf, 0, 0, 3);
	190	a->channels++;
	191
0bbaee3a AH	192	a->sample_bits = 0;
	193	a->max_bitrate = 0;
	194
7f4a9f43 WF	195	a->format = GRAB_BITS(buf, 0, 3, 4);
	196	switch (a->format) {
	197	case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
	198	snd_printd(KERN_INFO
03284c8f	199	"HDMI: audio coding type 0 not expected\n");
7f4a9f43 WF	200	break;
	201
	202	case AUDIO_CODING_TYPE_LPCM:
	203	val = GRAB_BITS(buf, 2, 0, 3);
7f4a9f43 WF	204	for (i = 0; i < 3; i++)
	205	if (val & (1 << i))
	206	a->sample_bits \|= cea_sample_sizes[i + 1];
	207	break;
	208
	209	case AUDIO_CODING_TYPE_AC3:
	210	case AUDIO_CODING_TYPE_MPEG1:
	211	case AUDIO_CODING_TYPE_MP3:
	212	case AUDIO_CODING_TYPE_MPEG2:
	213	case AUDIO_CODING_TYPE_AACLC:
	214	case AUDIO_CODING_TYPE_DTS:
	215	case AUDIO_CODING_TYPE_ATRAC:
	216	a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
	217	a->max_bitrate *= 8000;
	218	break;
	219
	220	case AUDIO_CODING_TYPE_SACD:
	221	break;
	222
	223	case AUDIO_CODING_TYPE_EAC3:
	224	break;
	225
	226	case AUDIO_CODING_TYPE_DTS_HD:
	227	break;
	228
	229	case AUDIO_CODING_TYPE_MLP:
	230	break;
	231
	232	case AUDIO_CODING_TYPE_DST:
	233	break;
	234
	235	case AUDIO_CODING_TYPE_WMAPRO:
	236	a->profile = GRAB_BITS(buf, 2, 0, 3);
	237	break;
	238
	239	case AUDIO_CODING_TYPE_REF_CXT:
	240	a->format = GRAB_BITS(buf, 2, 3, 5);
	241	if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT \|\|
	242	a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
	243	snd_printd(KERN_INFO
03284c8f	244	"HDMI: audio coding xtype %d not expected\n",
7f4a9f43 WF	245	a->format);
	246	a->format = 0;
	247	} else
	248	a->format += AUDIO_CODING_TYPE_HE_AAC -
	249	AUDIO_CODING_XTYPE_HE_AAC;
	250	break;
	251	}
	252	}
	253
	254	/*
	255	* Be careful, ELD buf could be totally rubbish!
	256	*/
5b87ebb7 WF	257	static int hdmi_update_eld(struct hdmi_eld *e,
5b87ebb7 WF	258	const unsigned char *buf, int size)
7f4a9f43 WF	259	{
	260	int mnl;
	261	int i;
	262
	263	e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
	264	if (e->eld_ver != ELD_VER_CEA_861D &&
	265	e->eld_ver != ELD_VER_PARTIAL) {
03284c8f WF	266	snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
03284c8f WF	267	e->eld_ver);
7f4a9f43 WF	268	goto out_fail;
	269	}
	270
	271	e->eld_size = size;
	272	e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
	273	mnl = GRAB_BITS(buf, 4, 0, 5);
	274	e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
	275
	276	e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
	277	e->support_ai = GRAB_BITS(buf, 5, 1, 1);
	278	e->conn_type = GRAB_BITS(buf, 5, 2, 2);
	279	e->sad_count = GRAB_BITS(buf, 5, 4, 4);
	280
	281	e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
	282	e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
	283
	284	e->port_id = get_unaligned_le64(buf + 8);
	285
	286	/* not specified, but the spec's tendency is little endian */
	287	e->manufacture_id = get_unaligned_le16(buf + 16);
	288	e->product_id = get_unaligned_le16(buf + 18);
	289
	290	if (mnl > ELD_MAX_MNL) {
03284c8f	291	snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl);
7f4a9f43 WF	292	goto out_fail;
7f4a9f43 WF	293	} else if (ELD_FIXED_BYTES + mnl > size) {
03284c8f	294	snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl);
7f4a9f43 WF	295	goto out_fail;
	296	} else
	297	strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl);
	298
	299	for (i = 0; i < e->sad_count; i++) {
	300	if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
03284c8f	301	snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
7f4a9f43 WF	302	goto out_fail;
	303	}
	304	hdmi_update_short_audio_desc(e->sad + i,
	305	buf + ELD_FIXED_BYTES + mnl + 3 * i);
	306	}
	307
	308	return 0;
	309
	310	out_fail:
	311	e->eld_ver = 0;
	312	return -EINVAL;
	313	}
	314
7f4a9f43 WF	315	int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
	316	{
	317	return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
	318	AC_DIPSIZE_ELD_BUF);
	319	}
	320
5b87ebb7	321	int snd_hdmi_get_eld(struct hdmi_eld *eld,
7f4a9f43 WF	322	struct hda_codec *codec, hda_nid_t nid)
	323	{
	324	int i;
	325	int ret;
	326	int size;
	327	unsigned char *buf;
	328
5d44f927	329	if (!eld->eld_valid)
7f4a9f43 WF	330	return -ENOENT;
	331
	332	size = snd_hdmi_get_eld_size(codec, nid);
	333	if (size == 0) {
	334	/* wfg: workaround for ASUS P5E-VM HDMI board */
03284c8f	335	snd_printd(KERN_INFO "HDMI: ELD buf size is 0, force 128\n");
7f4a9f43 WF	336	size = 128;
	337	}
	338	if (size < ELD_FIXED_BYTES \|\| size > PAGE_SIZE) {
03284c8f	339	snd_printd(KERN_INFO "HDMI: invalid ELD buf size %d\n", size);
7f4a9f43 WF	340	return -ERANGE;
	341	}
	342
	343	buf = kmalloc(size, GFP_KERNEL);
	344	if (!buf)
	345	return -ENOMEM;
	346
	347	for (i = 0; i < size; i++)
	348	buf[i] = hdmi_get_eld_byte(codec, nid, i);
	349
5b87ebb7	350	ret = hdmi_update_eld(eld, buf, size);
7f4a9f43 WF	351
	352	kfree(buf);
	353	return ret;
	354	}
	355
	356	static void hdmi_show_short_audio_desc(struct cea_sad *a)
	357	{
	358	char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
ae8cb4ca	359	char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
7f4a9f43	360
ae8cb4ca WF	361	if (!a->format)
ae8cb4ca WF	362	return;
7f4a9f43 WF	363
7f4a9f43 WF	364	snd_print_pcm_rates(a->rates, buf, sizeof(buf));
7f4a9f43 WF	365
7f4a9f43 WF	366	if (a->format == AUDIO_CODING_TYPE_LPCM)
d757534e	367	snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8);
ae8cb4ca WF	368	else if (a->max_bitrate)
	369	snprintf(buf2, sizeof(buf2),
	370	", max bitrate = %d", a->max_bitrate);
	371	else
	372	buf2[0] = '\0';
	373
03284c8f	374	printk(KERN_INFO "HDMI: supports coding type %s:"
ae8cb4ca WF	375	" channels = %d, rates =%s%s\n",
	376	cea_audio_coding_type_names[a->format],
	377	a->channels,
	378	buf,
	379	buf2);
7f4a9f43 WF	380	}
7f4a9f43 WF	381
903b21d8	382	void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
7f4a9f43 WF	383	{
	384	int i, j;
	385
	386	for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
	387	if (spk_alloc & (1 << i))
06f69d17	388	j += snprintf(buf + j, buflen - j, " %s",
7f4a9f43 WF	389	cea_speaker_allocation_names[i]);
7f4a9f43 WF	390	}
7f4a9f43 WF	391	buf[j] = '\0'; /* necessary when j == 0 */
	392	}
	393
5b87ebb7	394	void snd_hdmi_show_eld(struct hdmi_eld *e)
7f4a9f43 WF	395	{
7f4a9f43 WF	396	int i;
ae8cb4ca	397
03284c8f	398	printk(KERN_INFO "HDMI: detected monitor %s at connection type %s\n",
ae8cb4ca WF	399	e->monitor_name,
	400	eld_connection_type_names[e->conn_type]);
	401
	402	if (e->spk_alloc) {
	403	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
	404	snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
03284c8f	405	printk(KERN_INFO "HDMI: available speakers:%s\n", buf);
ae8cb4ca	406	}
7f4a9f43 WF	407
	408	for (i = 0; i < e->sad_count; i++)
	409	hdmi_show_short_audio_desc(e->sad + i);
	410	}
5f1e71b1 WF	411
	412	#ifdef CONFIG_PROC_FS
	413
	414	static void hdmi_print_sad_info(int i, struct cea_sad *a,
	415	struct snd_info_buffer *buffer)
	416	{
d39b4352	417	char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
5f1e71b1 WF	418
	419	snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
	420	i, a->format, cea_audio_coding_type_names[a->format]);
	421	snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
	422
	423	snd_print_pcm_rates(a->rates, buf, sizeof(buf));
06f69d17	424	snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
5f1e71b1	425
d39b4352 WF	426	if (a->format == AUDIO_CODING_TYPE_LPCM) {
	427	snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
	428	snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
	429	i, a->sample_bits, buf);
	430	}
5f1e71b1 WF	431
	432	if (a->max_bitrate)
	433	snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
	434	i, a->max_bitrate);
	435
	436	if (a->profile)
	437	snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
	438	}
	439
	440	static void hdmi_print_eld_info(struct snd_info_entry *entry,
	441	struct snd_info_buffer *buffer)
	442	{
5b87ebb7	443	struct hdmi_eld *e = entry->private_data;
903b21d8	444	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
5f1e71b1	445	int i;
4805286b WF	446	static char *eld_versoin_names[32] = {
	447	"reserved",
	448	"reserved",
	449	"CEA-861D or below",
	450	[3 ... 30] = "reserved",
	451	[31] = "partial"
	452	};
	453	static char *cea_edid_version_names[8] = {
	454	"no CEA EDID Timing Extension block present",
	455	"CEA-861",
	456	"CEA-861-A",
	457	"CEA-861-B, C or D",
	458	[4 ... 7] = "reserved"
	459	};
5f1e71b1	460
23ccc2bd WF	461	snd_iprintf(buffer, "monitor_present\t\t%d\n", e->monitor_present);
23ccc2bd WF	462	snd_iprintf(buffer, "eld_valid\t\t%d\n", e->eld_valid);
5d44f927 SW	463	if (!e->eld_valid)
5d44f927 SW	464	return;
db742104	465	snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
5f1e71b1 WF	466	snd_iprintf(buffer, "connection_type\t\t%s\n",
	467	eld_connection_type_names[e->conn_type]);
	468	snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
	469	eld_versoin_names[e->eld_ver]);
	470	snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
	471	cea_edid_version_names[e->cea_edid_ver]);
	472	snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
	473	snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
	474	snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
	475	snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
	476	snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
	477	snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
	478
903b21d8	479	snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
06f69d17	480	snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
5f1e71b1 WF	481
	482	snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
	483
	484	for (i = 0; i < e->sad_count; i++)
	485	hdmi_print_sad_info(i, e->sad + i, buffer);
	486	}
	487
acb05993	488	static void hdmi_write_eld_info(struct snd_info_entry *entry,
acdda791 WF	489	struct snd_info_buffer *buffer)
	490	{
	491	struct hdmi_eld *e = entry->private_data;
	492	char line[64];
	493	char name[64];
	494	char *sname;
	495	long long val;
78735cff	496	unsigned int n;
acdda791 WF	497
	498	while (!snd_info_get_line(buffer, line, sizeof(line))) {
	499	if (sscanf(line, "%s %llx", name, &val) != 2)
	500	continue;
acb05993 WF	501	/*
	502	* We don't allow modification to these fields:
	503	* monitor_name manufacture_id product_id
	504	* eld_version edid_version
	505	*/
23ccc2bd WF	506	if (!strcmp(name, "monitor_present"))
	507	e->monitor_present = val;
	508	else if (!strcmp(name, "eld_valid"))
	509	e->eld_valid = val;
	510	else if (!strcmp(name, "connection_type"))
acdda791 WF	511	e->conn_type = val;
	512	else if (!strcmp(name, "port_id"))
	513	e->port_id = val;
	514	else if (!strcmp(name, "support_hdcp"))
	515	e->support_hdcp = val;
	516	else if (!strcmp(name, "support_ai"))
	517	e->support_ai = val;
	518	else if (!strcmp(name, "audio_sync_delay"))
	519	e->aud_synch_delay = val;
	520	else if (!strcmp(name, "speakers"))
	521	e->spk_alloc = val;
	522	else if (!strcmp(name, "sad_count"))
	523	e->sad_count = val;
	524	else if (!strncmp(name, "sad", 3)) {
	525	sname = name + 4;
	526	n = name[3] - '0';
	527	if (name[4] >= '0' && name[4] <= '9') {
	528	sname++;
	529	n = 10 * n + name[4] - '0';
	530	}
78735cff	531	if (n >= ELD_MAX_SAD)
acdda791 WF	532	continue;
	533	if (!strcmp(sname, "_coding_type"))
	534	e->sad[n].format = val;
	535	else if (!strcmp(sname, "_channels"))
	536	e->sad[n].channels = val;
	537	else if (!strcmp(sname, "_rates"))
	538	e->sad[n].rates = val;
	539	else if (!strcmp(sname, "_bits"))
	540	e->sad[n].sample_bits = val;
	541	else if (!strcmp(sname, "_max_bitrate"))
	542	e->sad[n].max_bitrate = val;
acb05993 WF	543	else if (!strcmp(sname, "_profile"))
acb05993 WF	544	e->sad[n].profile = val;
acdda791 WF	545	if (n >= e->sad_count)
	546	e->sad_count = n + 1;
	547	}
	548	}
	549	}
	550
	551
54a25f87 WF	552	int snd_hda_eld_proc_new(struct hda_codec codec, struct hdmi_eld eld,
54a25f87 WF	553	int index)
5f1e71b1 WF	554	{
	555	char name[32];
	556	struct snd_info_entry *entry;
	557	int err;
	558
54a25f87	559	snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
5f1e71b1 WF	560	err = snd_card_proc_new(codec->bus->card, name, &entry);
	561	if (err < 0)
	562	return err;
	563
	564	snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
acb05993	565	entry->c.text.write = hdmi_write_eld_info;
acdda791	566	entry->mode \|= S_IWUSR;
f208dba9	567	eld->proc_entry = entry;
acdda791	568
5f1e71b1 WF	569	return 0;
	570	}
	571
f208dba9 TI	572	void snd_hda_eld_proc_free(struct hda_codec codec, struct hdmi_eld eld)
	573	{
	574	if (!codec->bus->shutdown && eld->proc_entry) {
	575	snd_device_free(codec->bus->card, eld->proc_entry);
	576	eld->proc_entry = NULL;
	577	}
	578	}
	579
274714f5 TI	580	#endif /* CONFIG_PROC_FS */
274714f5 TI	581
bbbe3390 TI	582	/* update PCM info based on ELD */
	583	void hdmi_eld_update_pcm_info(struct hdmi_eld eld, struct hda_pcm_stream pcm,
	584	struct hda_pcm_stream *codec_pars)
	585	{
	586	int i;
	587
3dc86429 AH	588	/* assume basic audio support (the basic audio flag is not in ELD;
	589	* however, all audio capable sinks are required to support basic
	590	* audio) */
	591	pcm->rates = SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000;
	592	pcm->formats = SNDRV_PCM_FMTBIT_S16_LE;
	593	pcm->maxbps = 16;
	594	pcm->channels_max = 2;
bbbe3390 TI	595	for (i = 0; i < eld->sad_count; i++) {
	596	struct cea_sad *a = &eld->sad[i];
	597	pcm->rates \|= a->rates;
bbbe3390 TI	598	if (a->channels > pcm->channels_max)
	599	pcm->channels_max = a->channels;
	600	if (a->format == AUDIO_CODING_TYPE_LPCM) {
bbbe3390 TI	601	if (a->sample_bits & AC_SUPPCM_BITS_20) {
	602	pcm->formats \|= SNDRV_PCM_FMTBIT_S32_LE;
	603	if (pcm->maxbps < 20)
	604	pcm->maxbps = 20;
	605	}
	606	if (a->sample_bits & AC_SUPPCM_BITS_24) {
	607	pcm->formats \|= SNDRV_PCM_FMTBIT_S32_LE;
	608	if (pcm->maxbps < 24)
	609	pcm->maxbps = 24;
	610	}
	611	}
	612	}
	613
	614	if (!codec_pars)
	615	return;
	616
	617	/* restrict the parameters by the values the codec provides */
	618	pcm->rates &= codec_pars->rates;
	619	pcm->formats &= codec_pars->formats;
bbbe3390 TI	620	pcm->channels_max = min(pcm->channels_max, codec_pars->channels_max);
	621	pcm->maxbps = min(pcm->maxbps, codec_pars->maxbps);
	622	}