patch_hdmi.c 73.3 KB
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/*
 *
 *  patch_hdmi.c - routines for HDMI/DisplayPort codecs
 *
 *  Copyright(c) 2008-2010 Intel Corporation. All rights reserved.
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 *  Copyright (c) 2006 ATI Technologies Inc.
 *  Copyright (c) 2008 NVIDIA Corp.  All rights reserved.
 *  Copyright (c) 2008 Wei Ni <wni@nvidia.com>
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 *
 *  Authors:
 *			Wu Fengguang <wfg@linux.intel.com>
 *
 *  Maintained by:
 *			Wu Fengguang <wfg@linux.intel.com>
 *
 *  This program 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 program 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.
 */

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#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/jack.h>
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#include <sound/asoundef.h>
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#include <sound/tlv.h>
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#include "hda_codec.h"
#include "hda_local.h"
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#include "hda_jack.h"
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static bool static_hdmi_pcm;
module_param(static_hdmi_pcm, bool, 0644);
MODULE_PARM_DESC(static_hdmi_pcm, "Don't restrict PCM parameters per ELD info");

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struct hdmi_spec_per_cvt {
	hda_nid_t cvt_nid;
	int assigned;
	unsigned int channels_min;
	unsigned int channels_max;
	u32 rates;
	u64 formats;
	unsigned int maxbps;
};
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/* max. connections to a widget */
#define HDA_MAX_CONNECTIONS	32

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struct hdmi_spec_per_pin {
	hda_nid_t pin_nid;
	int num_mux_nids;
	hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
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	struct hda_codec *codec;
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	struct hdmi_eld sink_eld;
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	struct delayed_work work;
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	struct snd_kcontrol *eld_ctl;
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	int repoll_count;
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	bool non_pcm;
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	bool chmap_set;		/* channel-map override by ALSA API? */
	unsigned char chmap[8]; /* ALSA API channel-map */
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	char pcm_name[8];	/* filled in build_pcm callbacks */
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};
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struct hdmi_spec {
	int num_cvts;
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	struct snd_array cvts; /* struct hdmi_spec_per_cvt */
	hda_nid_t cvt_nids[4]; /* only for haswell fix */
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	int num_pins;
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	struct snd_array pins; /* struct hdmi_spec_per_pin */
	struct snd_array pcm_rec; /* struct hda_pcm */
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	unsigned int channels_max; /* max over all cvts */
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	struct hdmi_eld temp_eld;
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	/*
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	 * Non-generic ATI/NVIDIA specific
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	 */
	struct hda_multi_out multiout;
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	struct hda_pcm_stream pcm_playback;
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};


struct hdmi_audio_infoframe {
	u8 type; /* 0x84 */
	u8 ver;  /* 0x01 */
	u8 len;  /* 0x0a */

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	u8 checksum;

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	u8 CC02_CT47;	/* CC in bits 0:2, CT in 4:7 */
	u8 SS01_SF24;
	u8 CXT04;
	u8 CA;
	u8 LFEPBL01_LSV36_DM_INH7;
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};

struct dp_audio_infoframe {
	u8 type; /* 0x84 */
	u8 len;  /* 0x1b */
	u8 ver;  /* 0x11 << 2 */

	u8 CC02_CT47;	/* match with HDMI infoframe from this on */
	u8 SS01_SF24;
	u8 CXT04;
	u8 CA;
	u8 LFEPBL01_LSV36_DM_INH7;
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};

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union audio_infoframe {
	struct hdmi_audio_infoframe hdmi;
	struct dp_audio_infoframe dp;
	u8 bytes[0];
};

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/*
 * CEA speaker placement:
 *
 *        FLH       FCH        FRH
 *  FLW    FL  FLC   FC   FRC   FR   FRW
 *
 *                                  LFE
 *                     TC
 *
 *          RL  RLC   RC   RRC   RR
 *
 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
 * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
 */
enum cea_speaker_placement {
	FL  = (1 <<  0),	/* Front Left           */
	FC  = (1 <<  1),	/* Front Center         */
	FR  = (1 <<  2),	/* Front Right          */
	FLC = (1 <<  3),	/* Front Left Center    */
	FRC = (1 <<  4),	/* Front Right Center   */
	RL  = (1 <<  5),	/* Rear Left            */
	RC  = (1 <<  6),	/* Rear Center          */
	RR  = (1 <<  7),	/* Rear Right           */
	RLC = (1 <<  8),	/* Rear Left Center     */
	RRC = (1 <<  9),	/* Rear Right Center    */
	LFE = (1 << 10),	/* Low Frequency Effect */
	FLW = (1 << 11),	/* Front Left Wide      */
	FRW = (1 << 12),	/* Front Right Wide     */
	FLH = (1 << 13),	/* Front Left High      */
	FCH = (1 << 14),	/* Front Center High    */
	FRH = (1 << 15),	/* Front Right High     */
	TC  = (1 << 16),	/* Top Center           */
};

/*
 * ELD SA bits in the CEA Speaker Allocation data block
 */
static int eld_speaker_allocation_bits[] = {
	[0] = FL | FR,
	[1] = LFE,
	[2] = FC,
	[3] = RL | RR,
	[4] = RC,
	[5] = FLC | FRC,
	[6] = RLC | RRC,
	/* the following are not defined in ELD yet */
	[7] = FLW | FRW,
	[8] = FLH | FRH,
	[9] = TC,
	[10] = FCH,
};

struct cea_channel_speaker_allocation {
	int ca_index;
	int speakers[8];

	/* derived values, just for convenience */
	int channels;
	int spk_mask;
};

/*
 * ALSA sequence is:
 *
 *       surround40   surround41   surround50   surround51   surround71
 * ch0   front left   =            =            =            =
 * ch1   front right  =            =            =            =
 * ch2   rear left    =            =            =            =
 * ch3   rear right   =            =            =            =
 * ch4                LFE          center       center       center
 * ch5                                          LFE          LFE
 * ch6                                                       side left
 * ch7                                                       side right
 *
 * surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR}
 */
static int hdmi_channel_mapping[0x32][8] = {
	/* stereo */
	[0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
	/* 2.1 */
	[0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 },
	/* Dolby Surround */
	[0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 },
	/* surround40 */
	[0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 },
	/* 4ch */
	[0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 },
	/* surround41 */
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	[0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 },
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	/* surround50 */
	[0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 },
	/* surround51 */
	[0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 },
	/* 7.1 */
	[0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 },
};

/*
 * This is an ordered list!
 *
 * The preceding ones have better chances to be selected by
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 * hdmi_channel_allocation().
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 */
static struct cea_channel_speaker_allocation channel_allocations[] = {
/*			  channel:   7     6    5    4    3     2    1    0  */
{ .ca_index = 0x00,  .speakers = {   0,    0,   0,   0,   0,    0,  FR,  FL } },
				 /* 2.1 */
{ .ca_index = 0x01,  .speakers = {   0,    0,   0,   0,   0,  LFE,  FR,  FL } },
				 /* Dolby Surround */
{ .ca_index = 0x02,  .speakers = {   0,    0,   0,   0,  FC,    0,  FR,  FL } },
				 /* surround40 */
{ .ca_index = 0x08,  .speakers = {   0,    0,  RR,  RL,   0,    0,  FR,  FL } },
				 /* surround41 */
{ .ca_index = 0x09,  .speakers = {   0,    0,  RR,  RL,   0,  LFE,  FR,  FL } },
				 /* surround50 */
{ .ca_index = 0x0a,  .speakers = {   0,    0,  RR,  RL,  FC,    0,  FR,  FL } },
				 /* surround51 */
{ .ca_index = 0x0b,  .speakers = {   0,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
				 /* 6.1 */
{ .ca_index = 0x0f,  .speakers = {   0,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
				 /* surround71 */
{ .ca_index = 0x13,  .speakers = { RRC,  RLC,  RR,  RL,  FC,  LFE,  FR,  FL } },

{ .ca_index = 0x03,  .speakers = {   0,    0,   0,   0,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x04,  .speakers = {   0,    0,   0,  RC,   0,    0,  FR,  FL } },
{ .ca_index = 0x05,  .speakers = {   0,    0,   0,  RC,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x06,  .speakers = {   0,    0,   0,  RC,  FC,    0,  FR,  FL } },
{ .ca_index = 0x07,  .speakers = {   0,    0,   0,  RC,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x0c,  .speakers = {   0,   RC,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x0d,  .speakers = {   0,   RC,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x0e,  .speakers = {   0,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x10,  .speakers = { RRC,  RLC,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x11,  .speakers = { RRC,  RLC,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x12,  .speakers = { RRC,  RLC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x14,  .speakers = { FRC,  FLC,   0,   0,   0,    0,  FR,  FL } },
{ .ca_index = 0x15,  .speakers = { FRC,  FLC,   0,   0,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x16,  .speakers = { FRC,  FLC,   0,   0,  FC,    0,  FR,  FL } },
{ .ca_index = 0x17,  .speakers = { FRC,  FLC,   0,   0,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x18,  .speakers = { FRC,  FLC,   0,  RC,   0,    0,  FR,  FL } },
{ .ca_index = 0x19,  .speakers = { FRC,  FLC,   0,  RC,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x1a,  .speakers = { FRC,  FLC,   0,  RC,  FC,    0,  FR,  FL } },
{ .ca_index = 0x1b,  .speakers = { FRC,  FLC,   0,  RC,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x1c,  .speakers = { FRC,  FLC,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x1d,  .speakers = { FRC,  FLC,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x1e,  .speakers = { FRC,  FLC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x1f,  .speakers = { FRC,  FLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x20,  .speakers = {   0,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x21,  .speakers = {   0,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x22,  .speakers = {  TC,    0,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x23,  .speakers = {  TC,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x24,  .speakers = { FRH,  FLH,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x25,  .speakers = { FRH,  FLH,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x26,  .speakers = { FRW,  FLW,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x27,  .speakers = { FRW,  FLW,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x28,  .speakers = {  TC,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x29,  .speakers = {  TC,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x2a,  .speakers = { FCH,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x2b,  .speakers = { FCH,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x2c,  .speakers = {  TC,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x2d,  .speakers = {  TC,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x2e,  .speakers = { FRH,  FLH,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x2f,  .speakers = { FRH,  FLH,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x30,  .speakers = { FRW,  FLW,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x31,  .speakers = { FRW,  FLW,  RR,  RL,  FC,  LFE,  FR,  FL } },
};


/*
 * HDMI routines
 */

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#define get_pin(spec, idx) \
	((struct hdmi_spec_per_pin *)snd_array_elem(&spec->pins, idx))
#define get_cvt(spec, idx) \
	((struct hdmi_spec_per_cvt  *)snd_array_elem(&spec->cvts, idx))
#define get_pcm_rec(spec, idx) \
	((struct hda_pcm *)snd_array_elem(&spec->pcm_rec, idx))

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static int pin_nid_to_pin_index(struct hdmi_spec *spec, hda_nid_t pin_nid)
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{
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	int pin_idx;
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	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++)
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		if (get_pin(spec, pin_idx)->pin_nid == pin_nid)
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			return pin_idx;
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	snd_printk(KERN_WARNING "HDMI: pin nid %d not registered\n", pin_nid);
	return -EINVAL;
}

static int hinfo_to_pin_index(struct hdmi_spec *spec,
			      struct hda_pcm_stream *hinfo)
{
	int pin_idx;

	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++)
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		if (get_pcm_rec(spec, pin_idx)->stream == hinfo)
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			return pin_idx;

	snd_printk(KERN_WARNING "HDMI: hinfo %p not registered\n", hinfo);
	return -EINVAL;
}

static int cvt_nid_to_cvt_index(struct hdmi_spec *spec, hda_nid_t cvt_nid)
{
	int cvt_idx;

	for (cvt_idx = 0; cvt_idx < spec->num_cvts; cvt_idx++)
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		if (get_cvt(spec, cvt_idx)->cvt_nid == cvt_nid)
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			return cvt_idx;

	snd_printk(KERN_WARNING "HDMI: cvt nid %d not registered\n", cvt_nid);
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	return -EINVAL;
}

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static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
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	struct hdmi_spec *spec = codec->spec;
	struct hdmi_eld *eld;
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	int pin_idx;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;

	pin_idx = kcontrol->private_value;
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	eld = &get_pin(spec, pin_idx)->sink_eld;
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	mutex_lock(&eld->lock);
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	uinfo->count = eld->eld_valid ? eld->eld_size : 0;
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	mutex_unlock(&eld->lock);
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	return 0;
}

static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
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	struct hdmi_spec *spec = codec->spec;
	struct hdmi_eld *eld;
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	int pin_idx;

	pin_idx = kcontrol->private_value;
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	eld = &get_pin(spec, pin_idx)->sink_eld;
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	mutex_lock(&eld->lock);
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	if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data)) {
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		mutex_unlock(&eld->lock);
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		snd_BUG();
		return -EINVAL;
	}

	memset(ucontrol->value.bytes.data, 0,
	       ARRAY_SIZE(ucontrol->value.bytes.data));
	if (eld->eld_valid)
		memcpy(ucontrol->value.bytes.data, eld->eld_buffer,
		       eld->eld_size);
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	mutex_unlock(&eld->lock);
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	return 0;
}

static struct snd_kcontrol_new eld_bytes_ctl = {
	.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.name = "ELD",
	.info = hdmi_eld_ctl_info,
	.get = hdmi_eld_ctl_get,
};

static int hdmi_create_eld_ctl(struct hda_codec *codec, int pin_idx,
			int device)
{
	struct snd_kcontrol *kctl;
	struct hdmi_spec *spec = codec->spec;
	int err;

	kctl = snd_ctl_new1(&eld_bytes_ctl, codec);
	if (!kctl)
		return -ENOMEM;
	kctl->private_value = pin_idx;
	kctl->id.device = device;

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	err = snd_hda_ctl_add(codec, get_pin(spec, pin_idx)->pin_nid, kctl);
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	if (err < 0)
		return err;

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	get_pin(spec, pin_idx)->eld_ctl = kctl;
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	return 0;
}

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#ifdef BE_PARANOID
static void hdmi_get_dip_index(struct hda_codec *codec, hda_nid_t pin_nid,
				int *packet_index, int *byte_index)
{
	int val;

	val = snd_hda_codec_read(codec, pin_nid, 0,
				 AC_VERB_GET_HDMI_DIP_INDEX, 0);

	*packet_index = val >> 5;
	*byte_index = val & 0x1f;
}
#endif

static void hdmi_set_dip_index(struct hda_codec *codec, hda_nid_t pin_nid,
				int packet_index, int byte_index)
{
	int val;

	val = (packet_index << 5) | (byte_index & 0x1f);

	snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_INDEX, val);
}

static void hdmi_write_dip_byte(struct hda_codec *codec, hda_nid_t pin_nid,
				unsigned char val)
{
	snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_DATA, val);
}

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static void hdmi_init_pin(struct hda_codec *codec, hda_nid_t pin_nid)
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{
	/* Unmute */
	if (get_wcaps(codec, pin_nid) & AC_WCAP_OUT_AMP)
		snd_hda_codec_write(codec, pin_nid, 0,
				AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
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	/* Enable pin out: some machines with GM965 gets broken output when
	 * the pin is disabled or changed while using with HDMI
	 */
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	snd_hda_codec_write(codec, pin_nid, 0,
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			    AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
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}

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static int hdmi_get_channel_count(struct hda_codec *codec, hda_nid_t cvt_nid)
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{
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	return 1 + snd_hda_codec_read(codec, cvt_nid, 0,
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					AC_VERB_GET_CVT_CHAN_COUNT, 0);
}

static void hdmi_set_channel_count(struct hda_codec *codec,
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				   hda_nid_t cvt_nid, int chs)
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{
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	if (chs != hdmi_get_channel_count(codec, cvt_nid))
		snd_hda_codec_write(codec, cvt_nid, 0,
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				    AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
}


/*
 * Channel mapping routines
 */

/*
 * Compute derived values in channel_allocations[].
 */
static void init_channel_allocations(void)
{
	int i, j;
	struct cea_channel_speaker_allocation *p;

	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		p = channel_allocations + i;
		p->channels = 0;
		p->spk_mask = 0;
		for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
			if (p->speakers[j]) {
				p->channels++;
				p->spk_mask |= p->speakers[j];
			}
	}
}

501 502 503 504 505 506 507 508 509 510 511
static int get_channel_allocation_order(int ca)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		if (channel_allocations[i].ca_index == ca)
			break;
	}
	return i;
}

512 513 514 515 516 517 518 519
/*
 * The transformation takes two steps:
 *
 *	eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
 *	      spk_mask => (channel_allocations[])         => ai->CA
 *
 * TODO: it could select the wrong CA from multiple candidates.
*/
520
static int hdmi_channel_allocation(struct hdmi_eld *eld, int channels)
521 522
{
	int i;
523
	int ca = 0;
524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539
	int spk_mask = 0;
	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];

	/*
	 * CA defaults to 0 for basic stereo audio
	 */
	if (channels <= 2)
		return 0;

	/*
	 * expand ELD's speaker allocation mask
	 *
	 * ELD tells the speaker mask in a compact(paired) form,
	 * expand ELD's notions to match the ones used by Audio InfoFrame.
	 */
	for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
540
		if (eld->info.spk_alloc & (1 << i))
541 542 543 544 545 546 547 548
			spk_mask |= eld_speaker_allocation_bits[i];
	}

	/* search for the first working match in the CA table */
	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		if (channels == channel_allocations[i].channels &&
		    (spk_mask & channel_allocations[i].spk_mask) ==
				channel_allocations[i].spk_mask) {
549
			ca = channel_allocations[i].ca_index;
550 551 552 553
			break;
		}
	}

554
	snd_print_channel_allocation(eld->info.spk_alloc, buf, sizeof(buf));
555
	snd_printdd("HDMI: select CA 0x%x for %d-channel allocation: %s\n",
556
		    ca, channels, buf);
557

558
	return ca;
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
}

static void hdmi_debug_channel_mapping(struct hda_codec *codec,
				       hda_nid_t pin_nid)
{
#ifdef CONFIG_SND_DEBUG_VERBOSE
	int i;
	int slot;

	for (i = 0; i < 8; i++) {
		slot = snd_hda_codec_read(codec, pin_nid, 0,
						AC_VERB_GET_HDMI_CHAN_SLOT, i);
		printk(KERN_DEBUG "HDMI: ASP channel %d => slot %d\n",
						slot >> 4, slot & 0xf);
	}
#endif
}


578
static void hdmi_std_setup_channel_mapping(struct hda_codec *codec,
579
				       hda_nid_t pin_nid,
580
				       bool non_pcm,
581
				       int ca)
582 583 584
{
	int i;
	int err;
585
	int order;
586
	int non_pcm_mapping[8];
587

588
	order = get_channel_allocation_order(ca);
589

590
	if (hdmi_channel_mapping[ca][1] == 0) {
591
		for (i = 0; i < channel_allocations[order].channels; i++)
592 593 594 595 596
			hdmi_channel_mapping[ca][i] = i | (i << 4);
		for (; i < 8; i++)
			hdmi_channel_mapping[ca][i] = 0xf | (i << 4);
	}

597 598 599 600 601 602 603
	if (non_pcm) {
		for (i = 0; i < channel_allocations[order].channels; i++)
			non_pcm_mapping[i] = i | (i << 4);
		for (; i < 8; i++)
			non_pcm_mapping[i] = 0xf | (i << 4);
	}

604 605 606
	for (i = 0; i < 8; i++) {
		err = snd_hda_codec_write(codec, pin_nid, 0,
					  AC_VERB_SET_HDMI_CHAN_SLOT,
607
					  non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i]);
608
		if (err) {
609 610
			snd_printdd(KERN_NOTICE
				    "HDMI: channel mapping failed\n");
611 612 613 614 615 616 617
			break;
		}
	}

	hdmi_debug_channel_mapping(codec, pin_nid);
}

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struct channel_map_table {
	unsigned char map;		/* ALSA API channel map position */
	unsigned char cea_slot;		/* CEA slot value */
	int spk_mask;			/* speaker position bit mask */
};

static struct channel_map_table map_tables[] = {
	{ SNDRV_CHMAP_FL,	0x00,	FL },
	{ SNDRV_CHMAP_FR,	0x01,	FR },
	{ SNDRV_CHMAP_RL,	0x04,	RL },
	{ SNDRV_CHMAP_RR,	0x05,	RR },
	{ SNDRV_CHMAP_LFE,	0x02,	LFE },
	{ SNDRV_CHMAP_FC,	0x03,	FC },
	{ SNDRV_CHMAP_RLC,	0x06,	RLC },
	{ SNDRV_CHMAP_RRC,	0x07,	RRC },
	{} /* terminator */
};

/* from ALSA API channel position to speaker bit mask */
static int to_spk_mask(unsigned char c)
{
	struct channel_map_table *t = map_tables;
	for (; t->map; t++) {
		if (t->map == c)
			return t->spk_mask;
	}
	return 0;
}

/* from ALSA API channel position to CEA slot */
static int to_cea_slot(unsigned char c)
{
	struct channel_map_table *t = map_tables;
	for (; t->map; t++) {
		if (t->map == c)
			return t->cea_slot;
	}
	return 0x0f;
}

/* from CEA slot to ALSA API channel position */
static int from_cea_slot(unsigned char c)
{
	struct channel_map_table *t = map_tables;
	for (; t->map; t++) {
		if (t->cea_slot == c)
			return t->map;
	}
	return 0;
}

/* from speaker bit mask to ALSA API channel position */
static int spk_to_chmap(int spk)
{
	struct channel_map_table *t = map_tables;
	for (; t->map; t++) {
		if (t->spk_mask == spk)
			return t->map;
	}
	return 0;
}

/* get the CA index corresponding to the given ALSA API channel map */
static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
{
	int i, spks = 0, spk_mask = 0;

	for (i = 0; i < chs; i++) {
		int mask = to_spk_mask(map[i]);
		if (mask) {
			spk_mask |= mask;
			spks++;
		}
	}

	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		if ((chs == channel_allocations[i].channels ||
		     spks == channel_allocations[i].channels) &&
		    (spk_mask & channel_allocations[i].spk_mask) ==
				channel_allocations[i].spk_mask)
			return channel_allocations[i].ca_index;
	}
	return -1;
}

/* set up the channel slots for the given ALSA API channel map */
static int hdmi_manual_setup_channel_mapping(struct hda_codec *codec,
					     hda_nid_t pin_nid,
					     int chs, unsigned char *map)
{
	int i;
	for (i = 0; i < 8; i++) {
		int val, err;
		if (i < chs)
			val = to_cea_slot(map[i]);
		else
			val = 0xf;
		val |= (i << 4);
		err = snd_hda_codec_write(codec, pin_nid, 0,
					  AC_VERB_SET_HDMI_CHAN_SLOT, val);
		if (err)
			return -EINVAL;
	}
	return 0;
}

/* store ALSA API channel map from the current default map */
static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
{
	int i;
	for (i = 0; i < 8; i++) {
		if (i < channel_allocations[ca].channels)
			map[i] = from_cea_slot((hdmi_channel_mapping[ca][i] >> 4) & 0x0f);
		else
			map[i] = 0;
	}
}

static void hdmi_setup_channel_mapping(struct hda_codec *codec,
				       hda_nid_t pin_nid, bool non_pcm, int ca,
738 739
				       int channels, unsigned char *map,
				       bool chmap_set)
740
{
741
	if (!non_pcm && chmap_set) {
742 743 744 745 746 747 748
		hdmi_manual_setup_channel_mapping(codec, pin_nid,
						  channels, map);
	} else {
		hdmi_std_setup_channel_mapping(codec, pin_nid, non_pcm, ca);
		hdmi_setup_fake_chmap(map, ca);
	}
}
749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821

/*
 * Audio InfoFrame routines
 */

/*
 * Enable Audio InfoFrame Transmission
 */
static void hdmi_start_infoframe_trans(struct hda_codec *codec,
				       hda_nid_t pin_nid)
{
	hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
	snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_XMIT,
						AC_DIPXMIT_BEST);
}

/*
 * Disable Audio InfoFrame Transmission
 */
static void hdmi_stop_infoframe_trans(struct hda_codec *codec,
				      hda_nid_t pin_nid)
{
	hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
	snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_XMIT,
						AC_DIPXMIT_DISABLE);
}

static void hdmi_debug_dip_size(struct hda_codec *codec, hda_nid_t pin_nid)
{
#ifdef CONFIG_SND_DEBUG_VERBOSE
	int i;
	int size;

	size = snd_hdmi_get_eld_size(codec, pin_nid);
	printk(KERN_DEBUG "HDMI: ELD buf size is %d\n", size);

	for (i = 0; i < 8; i++) {
		size = snd_hda_codec_read(codec, pin_nid, 0,
						AC_VERB_GET_HDMI_DIP_SIZE, i);
		printk(KERN_DEBUG "HDMI: DIP GP[%d] buf size is %d\n", i, size);
	}
#endif
}

static void hdmi_clear_dip_buffers(struct hda_codec *codec, hda_nid_t pin_nid)
{
#ifdef BE_PARANOID
	int i, j;
	int size;
	int pi, bi;
	for (i = 0; i < 8; i++) {
		size = snd_hda_codec_read(codec, pin_nid, 0,
						AC_VERB_GET_HDMI_DIP_SIZE, i);
		if (size == 0)
			continue;

		hdmi_set_dip_index(codec, pin_nid, i, 0x0);
		for (j = 1; j < 1000; j++) {
			hdmi_write_dip_byte(codec, pin_nid, 0x0);
			hdmi_get_dip_index(codec, pin_nid, &pi, &bi);
			if (pi != i)
				snd_printd(KERN_INFO "dip index %d: %d != %d\n",
						bi, pi, i);
			if (bi == 0) /* byte index wrapped around */
				break;
		}
		snd_printd(KERN_INFO
			"HDMI: DIP GP[%d] buf reported size=%d, written=%d\n",
			i, size, j);
	}
#endif
}

822
static void hdmi_checksum_audio_infoframe(struct hdmi_audio_infoframe *hdmi_ai)
823
{
824
	u8 *bytes = (u8 *)hdmi_ai;
825 826 827
	u8 sum = 0;
	int i;

828
	hdmi_ai->checksum = 0;
829

830
	for (i = 0; i < sizeof(*hdmi_ai); i++)
831 832
		sum += bytes[i];

833
	hdmi_ai->checksum = -sum;
834 835 836 837
}

static void hdmi_fill_audio_infoframe(struct hda_codec *codec,
				      hda_nid_t pin_nid,
838
				      u8 *dip, int size)
839 840 841 842 843 844 845
{
	int i;

	hdmi_debug_dip_size(codec, pin_nid);
	hdmi_clear_dip_buffers(codec, pin_nid); /* be paranoid */

	hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
846 847
	for (i = 0; i < size; i++)
		hdmi_write_dip_byte(codec, pin_nid, dip[i]);
848 849 850
}

static bool hdmi_infoframe_uptodate(struct hda_codec *codec, hda_nid_t pin_nid,
851
				    u8 *dip, int size)
852 853 854 855 856 857 858 859 860
{
	u8 val;
	int i;

	if (snd_hda_codec_read(codec, pin_nid, 0, AC_VERB_GET_HDMI_DIP_XMIT, 0)
							    != AC_DIPXMIT_BEST)
		return false;

	hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
861
	for (i = 0; i < size; i++) {
862 863
		val = snd_hda_codec_read(codec, pin_nid, 0,
					 AC_VERB_GET_HDMI_DIP_DATA, 0);
864
		if (val != dip[i])
865 866 867 868 869 870
			return false;
	}

	return true;
}

871
static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
872 873
				       bool non_pcm,
				       struct snd_pcm_substream *substream)
874 875
{
	struct hdmi_spec *spec = codec->spec;
876
	struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
877
	hda_nid_t pin_nid = per_pin->pin_nid;
878
	int channels = substream->runtime->channels;
879
	struct hdmi_eld *eld;
880
	int ca;
881
	union audio_infoframe ai;
882

883
	eld = &per_pin->sink_eld;
884 885
	if (!eld->monitor_present)
		return;
886

887 888 889 890 891 892
	if (!non_pcm && per_pin->chmap_set)
		ca = hdmi_manual_channel_allocation(channels, per_pin->chmap);
	else
		ca = hdmi_channel_allocation(eld, channels);
	if (ca < 0)
		ca = 0;
893 894

	memset(&ai, 0, sizeof(ai));
895
	if (eld->info.conn_type == 0) { /* HDMI */
896 897 898 899 900 901 902 903
		struct hdmi_audio_infoframe *hdmi_ai = &ai.hdmi;

		hdmi_ai->type		= 0x84;
		hdmi_ai->ver		= 0x01;
		hdmi_ai->len		= 0x0a;
		hdmi_ai->CC02_CT47	= channels - 1;
		hdmi_ai->CA		= ca;
		hdmi_checksum_audio_infoframe(hdmi_ai);
904
	} else if (eld->info.conn_type == 1) { /* DisplayPort */
905 906 907 908 909 910 911 912 913 914 915 916
		struct dp_audio_infoframe *dp_ai = &ai.dp;

		dp_ai->type		= 0x84;
		dp_ai->len		= 0x1b;
		dp_ai->ver		= 0x11 << 2;
		dp_ai->CC02_CT47	= channels - 1;
		dp_ai->CA		= ca;
	} else {
		snd_printd("HDMI: unknown connection type at pin %d\n",
			    pin_nid);
		return;
	}
917

918 919 920 921 922 923 924 925 926 927 928
	/*
	 * sizeof(ai) is used instead of sizeof(*hdmi_ai) or
	 * sizeof(*dp_ai) to avoid partial match/update problems when
	 * the user switches between HDMI/DP monitors.
	 */
	if (!hdmi_infoframe_uptodate(codec, pin_nid, ai.bytes,
					sizeof(ai))) {
		snd_printdd("hdmi_setup_audio_infoframe: "
			    "pin=%d channels=%d\n",
			    pin_nid,
			    channels);
929
		hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca,
930 931
					   channels, per_pin->chmap,
					   per_pin->chmap_set);
932 933 934 935
		hdmi_stop_infoframe_trans(codec, pin_nid);
		hdmi_fill_audio_infoframe(codec, pin_nid,
					    ai.bytes, sizeof(ai));
		hdmi_start_infoframe_trans(codec, pin_nid);
936 937 938
	} else {
		/* For non-pcm audio switch, setup new channel mapping
		 * accordingly */
939
		if (per_pin->non_pcm != non_pcm)
940
			hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca,
941 942
						   channels, per_pin->chmap,
						   per_pin->chmap_set);
943
	}
944

945
	per_pin->non_pcm = non_pcm;
946 947 948 949 950 951 952
}


/*
 * Unsolicited events
 */

953
static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll);
954

955 956 957
static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
	struct hdmi_spec *spec = codec->spec;
958 959
	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
	int pin_nid;
960
	int pin_idx;
961 962 963 964 965 966 967
	struct hda_jack_tbl *jack;

	jack = snd_hda_jack_tbl_get_from_tag(codec, tag);
	if (!jack)
		return;
	pin_nid = jack->nid;
	jack->jack_dirty = 1;
968

969
	_snd_printd(SND_PR_VERBOSE,
970
		"HDMI hot plug event: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n",
971 972
		codec->addr, pin_nid,
		!!(res & AC_UNSOL_RES_PD), !!(res & AC_UNSOL_RES_ELDV));
973

974 975
	pin_idx = pin_nid_to_pin_index(spec, pin_nid);
	if (pin_idx < 0)
976 977
		return;

978
	hdmi_present_sense(get_pin(spec, pin_idx), 1);
979
	snd_hda_jack_report_sync(codec);
980 981 982 983 984 985 986 987 988 989
}

static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
	int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;
	int cp_state = !!(res & AC_UNSOL_RES_CP_STATE);
	int cp_ready = !!(res & AC_UNSOL_RES_CP_READY);

	printk(KERN_INFO
990
		"HDMI CP event: CODEC=%d TAG=%d SUBTAG=0x%x CP_STATE=%d CP_READY=%d\n",
991
		codec->addr,
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
		tag,
		subtag,
		cp_state,
		cp_ready);

	/* TODO */
	if (cp_state)
		;
	if (cp_ready)
		;
}


static void hdmi_unsol_event(struct hda_codec *codec, unsigned int res)
{
	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
	int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;

1010
	if (!snd_hda_jack_tbl_get_from_tag(codec, tag)) {
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
		snd_printd(KERN_INFO "Unexpected HDMI event tag 0x%x\n", tag);
		return;
	}

	if (subtag == 0)
		hdmi_intrinsic_event(codec, res);
	else
		hdmi_non_intrinsic_event(codec, res);
}

1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055
static void haswell_verify_pin_D0(struct hda_codec *codec, hda_nid_t nid)
{
	int pwr, lamp, ramp;

	pwr = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_POWER_STATE, 0);
	pwr = (pwr & AC_PWRST_ACTUAL) >> AC_PWRST_ACTUAL_SHIFT;
	if (pwr != AC_PWRST_D0) {
		snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_POWER_STATE,
				    AC_PWRST_D0);
		msleep(40);
		pwr = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_POWER_STATE, 0);
		pwr = (pwr & AC_PWRST_ACTUAL) >> AC_PWRST_ACTUAL_SHIFT;
		snd_printd("Haswell HDMI audio: Power for pin 0x%x is now D%d\n", nid, pwr);
	}

	lamp = snd_hda_codec_read(codec, nid, 0,
				  AC_VERB_GET_AMP_GAIN_MUTE,
				  AC_AMP_GET_LEFT | AC_AMP_GET_OUTPUT);
	ramp = snd_hda_codec_read(codec, nid, 0,
				  AC_VERB_GET_AMP_GAIN_MUTE,
				  AC_AMP_GET_RIGHT | AC_AMP_GET_OUTPUT);
	if (lamp != ramp) {
		snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_AMP_GAIN_MUTE,
				    AC_AMP_SET_RIGHT | AC_AMP_SET_OUTPUT | lamp);

		lamp = snd_hda_codec_read(codec, nid, 0,
				  AC_VERB_GET_AMP_GAIN_MUTE,
				  AC_AMP_GET_LEFT | AC_AMP_GET_OUTPUT);
		ramp = snd_hda_codec_read(codec, nid, 0,
				  AC_VERB_GET_AMP_GAIN_MUTE,
				  AC_AMP_GET_RIGHT | AC_AMP_GET_OUTPUT);
		snd_printd("Haswell HDMI audio: Mute after set on pin 0x%x: [0x%x 0x%x]\n", nid, lamp, ramp);
	}
}

1056 1057 1058 1059
/*
 * Callbacks
 */

1060 1061 1062 1063
/* HBR should be Non-PCM, 8 channels */
#define is_hbr_format(format) \
	((format & AC_FMT_TYPE_NON_PCM) && (format & AC_FMT_CHAN_MASK) == 7)

1064 1065
static int hdmi_setup_stream(struct hda_codec *codec, hda_nid_t cvt_nid,
			      hda_nid_t pin_nid, u32 stream_tag, int format)
1066
{
1067 1068 1069
	int pinctl;
	int new_pinctl = 0;

1070 1071 1072
	if (codec->vendor_id == 0x80862807)
		haswell_verify_pin_D0(codec, pin_nid);

1073 1074
	if (snd_hda_query_pin_caps(codec, pin_nid) & AC_PINCAP_HBR) {
		pinctl = snd_hda_codec_read(codec, pin_nid, 0,
1075 1076 1077
					    AC_VERB_GET_PIN_WIDGET_CONTROL, 0);

		new_pinctl = pinctl & ~AC_PINCTL_EPT;
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		if (is_hbr_format(format))
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			new_pinctl |= AC_PINCTL_EPT_HBR;
		else
			new_pinctl |= AC_PINCTL_EPT_NATIVE;

		snd_printdd("hdmi_setup_stream: "
			    "NID=0x%x, %spinctl=0x%x\n",
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			    pin_nid,
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			    pinctl == new_pinctl ? "" : "new-",
			    new_pinctl);

		if (pinctl != new_pinctl)
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			snd_hda_codec_write(codec, pin_nid, 0,
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					    AC_VERB_SET_PIN_WIDGET_CONTROL,
					    new_pinctl);

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	}
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	if (is_hbr_format(format) && !new_pinctl) {
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		snd_printdd("hdmi_setup_stream: HBR is not supported\n");
		return -EINVAL;
	}
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	snd_hda_codec_setup_stream(codec, cvt_nid, stream_tag, 0, format);
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	return 0;
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}

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/*
 * HDA PCM callbacks
 */
static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
			 struct hda_codec *codec,
			 struct snd_pcm_substream *substream)
{
	struct hdmi_spec *spec = codec->spec;
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	struct snd_pcm_runtime *runtime = substream->runtime;
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	int pin_idx, cvt_idx, mux_idx = 0;
	struct hdmi_spec_per_pin *per_pin;
	struct hdmi_eld *eld;
	struct hdmi_spec_per_cvt *per_cvt = NULL;
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	/* Validate hinfo */
	pin_idx = hinfo_to_pin_index(spec, hinfo);
	if (snd_BUG_ON(pin_idx < 0))
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		return -EINVAL;
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	per_pin = get_pin(spec, pin_idx);
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	eld = &per_pin->sink_eld;

	/* Dynamically assign converter to stream */
	for (cvt_idx = 0; cvt_idx < spec->num_cvts; cvt_idx++) {
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		per_cvt = get_cvt(spec, cvt_idx);
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		/* Must not already be assigned */
		if (per_cvt->assigned)
			continue;
		/* Must be in pin's mux's list of converters */
		for (mux_idx = 0; mux_idx < per_pin->num_mux_nids; mux_idx++)
			if (per_pin->mux_nids[mux_idx] == per_cvt->cvt_nid)
				break;
		/* Not in mux list */
		if (mux_idx == per_pin->num_mux_nids)
			continue;
		break;
	}
	/* No free converters */
	if (cvt_idx == spec->num_cvts)
		return -ENODEV;

	/* Claim converter */
	per_cvt->assigned = 1;
	hinfo->nid = per_cvt->cvt_nid;

	snd_hda_codec_write(codec, per_pin->pin_nid, 0,
			    AC_VERB_SET_CONNECT_SEL,
			    mux_idx);
	snd_hda_spdif_ctls_assign(codec, pin_idx, per_cvt->cvt_nid);
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	/* Initially set the converter's capabilities */
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	hinfo->channels_min = per_cvt->channels_min;
	hinfo->channels_max = per_cvt->channels_max;
	hinfo->rates = per_cvt->rates;
	hinfo->formats = per_cvt->formats;
	hinfo->maxbps = per_cvt->maxbps;
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	/* Restrict capabilities by ELD if this isn't disabled */
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	if (!static_hdmi_pcm && eld->eld_valid) {
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		snd_hdmi_eld_update_pcm_info(&eld->info, hinfo);
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		if (hinfo->channels_min > hinfo->channels_max ||
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		    !hinfo->rates || !hinfo->formats) {
			per_cvt->assigned = 0;
			hinfo->nid = 0;
			snd_hda_spdif_ctls_unassign(codec, pin_idx);
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			return -ENODEV;
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		}
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	}
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	/* Store the updated parameters */
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	runtime->hw.channels_min = hinfo->channels_min;
	runtime->hw.channels_max = hinfo->channels_max;
	runtime->hw.formats = hinfo->formats;
	runtime->hw.rates = hinfo->rates;
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	snd_pcm_hw_constraint_step(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_CHANNELS, 2);
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	return 0;
}

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/*
 * HDA/HDMI auto parsing
 */
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static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
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{
	struct hdmi_spec *spec = codec->spec;
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	struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
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	hda_nid_t pin_nid = per_pin->pin_nid;
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	if (!(get_wcaps(codec, pin_nid) & AC_WCAP_CONN_LIST)) {
		snd_printk(KERN_WARNING
			   "HDMI: pin %d wcaps %#x "
			   "does not support connection list\n",
			   pin_nid, get_wcaps(codec, pin_nid));
		return -EINVAL;
	}

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	per_pin->num_mux_nids = snd_hda_get_connections(codec, pin_nid,
							per_pin->mux_nids,
							HDA_MAX_CONNECTIONS);
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	return 0;
}

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static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
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{
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	struct hda_codec *codec = per_pin->codec;
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	struct hdmi_spec *spec = codec->spec;
	struct hdmi_eld *eld = &spec->temp_eld;
	struct hdmi_eld *pin_eld = &per_pin->sink_eld;
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	hda_nid_t pin_nid = per_pin->pin_nid;
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	/*
	 * Always execute a GetPinSense verb here, even when called from
	 * hdmi_intrinsic_event; for some NVIDIA HW, the unsolicited
	 * response's PD bit is not the real PD value, but indicates that
	 * the real PD value changed. An older version of the HD-audio
	 * specification worked this way. Hence, we just ignore the data in
	 * the unsolicited response to avoid custom WARs.
	 */
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	int present = snd_hda_pin_sense(codec, pin_nid);
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	bool update_eld = false;
	bool eld_changed = false;
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	pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
	if (pin_eld->monitor_present)
		eld->eld_valid  = !!(present & AC_PINSENSE_ELDV);
	else
		eld->eld_valid = false;
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	_snd_printd(SND_PR_VERBOSE,
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		"HDMI status: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n",
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		codec->addr, pin_nid, pin_eld->monitor_present, eld->eld_valid);
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	if (eld->eld_valid) {
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		if (snd_hdmi_get_eld(codec, pin_nid, eld->eld_buffer,
						     &eld->eld_size) < 0)
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			eld->eld_valid = false;
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		else {
			memset(&eld->info, 0, sizeof(struct parsed_hdmi_eld));
			if (snd_hdmi_parse_eld(&eld->info, eld->eld_buffer,
						    eld->eld_size) < 0)
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				eld->eld_valid = false;
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		}

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		if (eld->eld_valid) {
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			snd_hdmi_show_eld(&eld->info);
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			update_eld = true;
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		}
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		else if (repoll) {
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			queue_delayed_work(codec->bus->workq,
					   &per_pin->work,
					   msecs_to_jiffies(300));
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			return;
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		}
	}
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	mutex_lock(&pin_eld->lock);