sound/hda/codecs/realtek/alc880.c

Source file repositories/reference/linux-study-clean/sound/hda/codecs/realtek/alc880.c

File Facts

System
Linux kernel
Corpus path
sound/hda/codecs/realtek/alc880.c
Extension
.c
Size
15646 bytes
Lines
510
Domain
Driver Families
Bucket
sound/hda
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
//
// Realtek ALC880 codec
//

#include <linux/init.h>
#include <linux/module.h>
#include "realtek.h"

static void alc880_unsol_event(struct hda_codec *codec, unsigned int res)
{
	/* For some reason, the res given from ALC880 is broken.
	   Here we adjust it properly. */
	snd_hda_jack_unsol_event(codec, res >> 2);
}

static int alc880_parse_auto_config(struct hda_codec *codec)
{
	static const hda_nid_t alc880_ignore[] = { 0x1d, 0 };
	static const hda_nid_t alc880_ssids[] = { 0x15, 0x1b, 0x14, 0 };
	return alc_parse_auto_config(codec, alc880_ignore, alc880_ssids);
}

/*
 * ALC880 fix-ups
 */
enum {
	ALC880_FIXUP_GPIO1,
	ALC880_FIXUP_GPIO2,
	ALC880_FIXUP_MEDION_RIM,
	ALC880_FIXUP_LG,
	ALC880_FIXUP_LG_LW25,
	ALC880_FIXUP_W810,
	ALC880_FIXUP_EAPD_COEF,
	ALC880_FIXUP_TCL_S700,
	ALC880_FIXUP_VOL_KNOB,
	ALC880_FIXUP_FUJITSU,
	ALC880_FIXUP_F1734,
	ALC880_FIXUP_UNIWILL,
	ALC880_FIXUP_UNIWILL_DIG,
	ALC880_FIXUP_Z71V,
	ALC880_FIXUP_ASUS_W5A,
	ALC880_FIXUP_3ST_BASE,
	ALC880_FIXUP_3ST,
	ALC880_FIXUP_3ST_DIG,
	ALC880_FIXUP_5ST_BASE,
	ALC880_FIXUP_5ST,
	ALC880_FIXUP_5ST_DIG,
	ALC880_FIXUP_6ST_BASE,
	ALC880_FIXUP_6ST,
	ALC880_FIXUP_6ST_DIG,
	ALC880_FIXUP_6ST_AUTOMUTE,
};

/* enable the volume-knob widget support on NID 0x21 */
static void alc880_fixup_vol_knob(struct hda_codec *codec,
				  const struct hda_fixup *fix, int action)
{
	if (action == HDA_FIXUP_ACT_PROBE)
		snd_hda_jack_detect_enable_callback(codec, 0x21,
						    alc_update_knob_master);
}

static const struct hda_fixup alc880_fixups[] = {
	[ALC880_FIXUP_GPIO1] = {
		.type = HDA_FIXUP_FUNC,
		.v.func = alc_fixup_gpio1,
	},
	[ALC880_FIXUP_GPIO2] = {
		.type = HDA_FIXUP_FUNC,
		.v.func = alc_fixup_gpio2,
	},
	[ALC880_FIXUP_MEDION_RIM] = {
		.type = HDA_FIXUP_VERBS,
		.v.verbs = (const struct hda_verb[]) {
			{ 0x20, AC_VERB_SET_COEF_INDEX, 0x07 },
			{ 0x20, AC_VERB_SET_PROC_COEF,  0x3060 },
			{ }
		},
		.chained = true,
		.chain_id = ALC880_FIXUP_GPIO2,
	},
	[ALC880_FIXUP_LG] = {
		.type = HDA_FIXUP_PINS,
		.v.pins = (const struct hda_pintbl[]) {
			/* disable bogus unused pins */
			{ 0x16, 0x411111f0 },
			{ 0x18, 0x411111f0 },
			{ 0x1a, 0x411111f0 },
			{ }

Annotation

Implementation Notes