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List:       netbsd-users
Subject:    Re: Issuing ACPI call methods to disable NVIDIA Optimus card
From:       Jukka Ruohonen <jruohonen () iki ! fi>
Date:       2012-08-31 6:01:44
Message-ID: 20120831060144.GA4989 () marx ! bitnet
[Download RAW message or body]

On Fri, Aug 24, 2012 at 01:57:09PM +0200, Bartek Krawczyk wrote:
> I know nothing about writing NetBSD kernel modules so I'll just post
> the methods used on Linux:
> \_SB.PCI0.PEG1.GFX0._OFF - for shutting Nvidia card down
> \_SB.PCI0.PEG1.GFX0._ON - for turning it on before suspend.

But you can also try something like the following.

1. Make a directory "src/sys/modules/nvidia". Create a Makefile there with:

	.include "../Makefile.inc"

	.PATH:  ${S}/dev/acpi

	KMOD=   nvidia
	SRCS=   nvidia.c

	WARNS=  4

	.include <bsd.kmodule.mk>

2. Edit file "src/sys/dev/acpi/files.acpi" and put the following there:

	device  nvidia
	file    dev/acpi/nvidia.c               acpi

3. Drop the attached nvidia.c to "src/sys/dev/acpi".

4. Build within the module directory and load the created .kmod.

- Jukka.

["nvidia.c" (text/plain)]

#include <sys/param.h>
#include <sys/module.h>

#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>

MODULE(MODULE_CLASS_DRIVER, nvidia, NULL);

#define NVIDIA_ON "\\_SB.PCI0.PEG1.GFX0._ON"
#define NVIDIA_OFF "\\_SB.PCI0.PEG1.GFX0._OFF"

/*
 * Turns nVidia card off upon load and on upon unload.
 */
static int
nvidia_modcmd(modcmd_t cmd, void *aux)
{
	ACPI_INTEGER val;
	ACPI_STATUS rv;

	switch (cmd) {

	case MODULE_CMD_INIT:
		rv = acpi_eval_integer(NULL, NVIDIA_OFF, &val);

		if (ACPI_FAILURE(rv))
			(void)printf("Failed to evaluate '%s': %s\n",
			    NVIDIA_OFF, AcpiFormatException(rv));

		break;

	case MODULE_CMD_FINI:
		rv = acpi_eval_integer(NULL, NVIDIA_ON, &val);

		if (ACPI_FAILURE(rv))
			(void)printf("Failed to evaluate '%s': %s\n",
			    NVIDIA_OFF, AcpiFormatException(rv));

		break;

	default:
		return ENOTTY;
	}

	return 0;
}


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