github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 16:44:58 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

platform/x86: lg-laptop: Add support for the HDAP opregion field

Browse Source 
Various LG notebooks have a special field called "HDAP" inside
the ACPI operation region handled by the lg-laptop driver:

	Field (XIN1, AnyAcc, Lock, Preserve)
	{
		DMSG,   8,
		HDAP,   8,
		Offset (0x10),
		P80B,   8,
		P81B,   8,
		P82B,   8,
		P83B,   8,
		P84B,   8,
		P85B,   8,
		P86B,   8,
		P87B,   8,
		Offset (0x3E8),
		PMSG,   1600
	}

This field is set to 1/0 when the HD audio device is enabled/disabled
using the _PS0/_PS3 ACPI control methods. Add support for this field
to avoid printing warning messages when AML bytecode writes data
into it.

Reported-by: Peter Chubb <peter@chubb.wattle.id.au>
Tested-by: Peter Chubb <peter@chubb.wattle.id.au>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20251008064112.5981-1-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Armin Wolf 2025-10-08 08:41:12 +02:00 committed by Ilpo Järvinen
parent 0254329897
commit 644004565d
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/platform/x86/lg-laptop.c
View File

@ -19,6 +19,7 @@
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/string_choices.h>
#include <linux/types.h>
#include <acpi/battery.h>
@ -42,6 +43,7 @@ MODULE_PARM_DESC(fw_debug, "Enable printing of firmware debug messages");
#define LG_ADDRESS_SPACE_ID 0x8F
#define LG_ADDRESS_SPACE_DEBUG_FLAG_ADR 0x00
#define LG_ADDRESS_SPACE_HD_AUDIO_POWER_ADDR 0x01
#define LG_ADDRESS_SPACE_FAN_MODE_ADR 0x03
#define LG_ADDRESS_SPACE_DTTM_FLAG_ADR 0x20
@ -668,6 +670,15 @@ static acpi_status lg_laptop_address_space_write(struct device *dev, acpi_physic
byte = value & 0xFF;
switch (address) {
case LG_ADDRESS_SPACE_HD_AUDIO_POWER_ADDR:
/*
* The HD audio power field is not affected by the DTTM flag,
* so we have to manually check fw_debug.
*/
if (fw_debug)
dev_dbg(dev, "HD audio power %s\n", str_enabled_disabled(byte));
return AE_OK;
case LG_ADDRESS_SPACE_FAN_MODE_ADR:
/*
* The fan mode field is not affected by the DTTM flag, so we