path: root/sound/pci/hda/hda_auto_parser.c

/*
 * BIOS auto-parser helper functions for HD-audio
 *
 * Copyright (c) 2012 Takashi Iwai <tiwai@suse.de>
 *
 * 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.
 */

#include <linux/slab.h>
#include <linux/export.h>
#include <linux/sort.h>
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"
#include "hda_auto_parser.h"

#define SFX	"hda_codec: "

/*
 * Helper for automatic pin configuration
 */

static int is_in_nid_list(hda_nid_t nid, const hda_nid_t *list)
{
	for (; *list; list++)
		if (*list == nid)
			return 1;
	return 0;
}

/* a pair of input pin and its sequence */
struct auto_out_pin {
	hda_nid_t pin;
	short seq;
};

static int compare_seq(const void *ap, const void *bp)
{
	const struct auto_out_pin *a = ap;
	const struct auto_out_pin *b = bp;
	return (int)(a->seq - b->seq);
}

/*
 * Sort an associated group of pins according to their sequence numbers.
 * then store it to a pin array.
 */
static void sort_pins_by_sequence(hda_nid_t *pins, struct auto_out_pin *list,
				  int num_pins)
{
	int i;
	sort(list, num_pins, sizeof(list[0]), compare_seq, NULL);
	for (i = 0; i < num_pins; i++)
		pins[i] = list[i].pin;
}


/* add the found input-pin to the cfg->inputs[] table */
static void add_auto_cfg_input_pin(struct auto_pin_cfg *cfg, hda_nid_t nid,
				   int type)
{
	if (cfg->num_inputs < AUTO_CFG_MAX_INS) {
		cfg->inputs[cfg->num_inputs].pin = nid;
		cfg->inputs[cfg->num_inputs].type = type;
		cfg->num_inputs++;
	}
}

static int compare_input_type(const void *ap, const void *bp)
{
	const struct auto_pin_cfg_item *a = ap;
	const struct auto_pin_cfg_item *b = bp;
	return (int)(a->type - b->type);
}

/* Reorder the surround channels
 * ALSA sequence is front/surr/clfe/side
 * HDA sequence is:
 *    4-ch: front/surr  =>  OK as it is
 *    6-ch: front/clfe/surr
 *    8-ch: front/clfe/rear/side|fc
 */
static void reorder_outputs(unsigned int nums, hda_nid_t *pins)
{
	hda_nid_t nid;

	switch (nums) {
	case 3:
	case 4:
		nid = pins[1];
		pins[1] = pins[2];
		pins[2] = nid;
		break;
	}
}

/* check whether the given pin has a proper pin I/O capability bit */
static bool check_pincap_validity(struct hda_codec *codec, hda_nid_t pin,
				  unsigned int dev)
{
	unsigned int pincap = snd_hda_query_pin_caps(codec, pin);

	/* some old hardware don't return the proper pincaps */
	if (!pincap)
		return true;

	switch (dev) {
	case AC_JACK_LINE_OUT:
	case AC_JACK_SPEAKER:
	case AC_JACK_HP_OUT:
	case AC_JACK_SPDIF_OUT:
	case AC_JACK_DIG_OTHER_OUT:
		return !!(pincap & AC_PINCAP_OUT);
	default:
		return !!(pincap & AC_PINCAP_IN);
	}
}

static bool can_be_headset_mic(struct hda_codec *codec,
			       struct auto_pin_cfg_item *item,
			       int seq_number)
{
	int attr;
	unsigned int def_conf;
	if (item->type != AUTO_PIN_MIC)
		return false;

	if (item->is_headset_mic || item->is_headphone_mic)
		return false; /* Already assigned */

	def_conf = snd_hda_codec_get_pincfg(codec, item->pin);
	attr = snd_hda_get_input_pin_attr(def_conf);
	if (attr <= INPUT_PIN_ATTR_DOCK)
		return false;

	if (seq_number >= 0) {
		int seq = get_defcfg_sequence(def_conf);
		if (seq != seq_number)
			return false;
	}

	return true;
}

/*
 * Parse all pin widgets and store the useful pin nids to cfg
 *
 * The number of line-outs or any primary output is stored in line_outs,
 * and the corresponding output pins are assigned to line_out_pins[],
 * in the order of front, rear, CLFE, side, ...
 *
 * If more extra outputs (speaker and headphone) are found, the pins are
 * assisnged to hp_pins[] and speaker_pins[], respectively.  If no line-out jack
 * is detected, one of speaker of HP pins is assigned as the primary
 * output, i.e. to line_out_pins[0].  So, line_outs is always positive
 * if any analog output exists.
 *
 * The analog input pins are assigned to inputs array.
 * The digital input/output pins are assigned to dig_in_pin and dig_out_pin,
 * respectively.
 */
int snd_hda_parse_pin_defcfg(struct hda_codec *codec,
			     struct auto_pin_cfg *cfg,
			     const hda_nid_t *ignore_nids,
			     unsigned int cond_flags)
{
	hda_nid_t nid, end_nid;
	short seq, assoc_line_out;
	struct auto_out_pin line_out[ARRAY_SIZE(cfg->line_out_pins)];
	struct auto_out_pin speaker_out[ARRAY_SIZE(cfg->speaker_pins)];
	struct auto_out_pin hp_out[ARRAY_SIZE(cfg->hp_pins)];
	int i;

	if (!snd_hda_get_int_hint(codec, "parser_flags", &i))
		cond_flags = i;

	memset(cfg, 0