Unverified Commit 64400456 authored by Armin Wolf's avatar Armin Wolf Committed by Ilpo Järvinen
Browse files

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



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: default avatarPeter Chubb <peter@chubb.wattle.id.au>
Tested-by: default avatarPeter Chubb <peter@chubb.wattle.id.au>
Signed-off-by: default avatarArmin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20251008064112.5981-1-W_Armin@gmx.de


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent 02543298

drivers/platform/x86/lg-laptop.c

+11 −0
Original line number Diff line number Diff line
@@ -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