C++ (Cpp) acpi_video_dmi_promote_vendor Examples

Example #1

File: mba6x_bl.c Project: atodorov/mba6x_bl

static int platform_probe(struct platform_device *dev)
{
	struct backlight_properties props;
	int ret;

	mutex_init(&dev_priv.mutex);
	INIT_DELAYED_WORK(&dev_priv.work, brightness_work);

	ret = lp8550_probe();
	if (ret)
		return ret;

	ret = lp8550_save();
	if (ret)
		return ret;

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = 255;
	props.type = BACKLIGHT_FIRMWARE;
	props.power = 0; /* Power is on */

	backlight_device = backlight_device_register("mba6x_backlight",
						     NULL, NULL,
						     &backlight_ops, &props);
	if (IS_ERR(backlight_device)) {
		pr_err("mba6x_bl: Failed to register backlight device\n");
		return PTR_ERR(backlight_device);
	}

	backlight_device->props.brightness = INIT_BRIGHTNESS;
	backlight_update_status(backlight_device);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
	acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
#else
	acpi_video_dmi_promote_vendor();
#endif
	acpi_video_unregister();

	return 0;
}

Example #2

File: apple-gmux.c Project: AmesianX/netlink-mmap

static int __devinit gmux_probe(struct pnp_dev *pnp,
				const struct pnp_device_id *id)
{
	struct apple_gmux_data *gmux_data;
	struct resource *res;
	struct backlight_properties props;
	struct backlight_device *bdev;
	u8 ver_major, ver_minor, ver_release;
	int ret = -ENXIO;

	gmux_data = kzalloc(sizeof(*gmux_data), GFP_KERNEL);
	if (!gmux_data)
		return -ENOMEM;
	pnp_set_drvdata(pnp, gmux_data);

	res = pnp_get_resource(pnp, IORESOURCE_IO, 0);
	if (!res) {
		pr_err("Failed to find gmux I/O resource\n");
		goto err_free;
	}

	gmux_data->iostart = res->start;
	gmux_data->iolen = res->end - res->start;

	if (gmux_data->iolen < GMUX_MIN_IO_LEN) {
		pr_err("gmux I/O region too small (%lu < %u)\n",
		       gmux_data->iolen, GMUX_MIN_IO_LEN);
		goto err_free;
	}

	if (!request_region(gmux_data->iostart, gmux_data->iolen,
			    "Apple gmux")) {
		pr_err("gmux I/O already in use\n");
		goto err_free;
	}

	/*
	 * On some machines the gmux is in ACPI even thought the machine
	 * doesn't really have a gmux. Check for invalid version information
	 * to detect this.
	 */
	ver_major = gmux_read8(gmux_data, GMUX_PORT_VERSION_MAJOR);
	ver_minor = gmux_read8(gmux_data, GMUX_PORT_VERSION_MINOR);
	ver_release = gmux_read8(gmux_data, GMUX_PORT_VERSION_RELEASE);
	if (ver_major == 0xff && ver_minor == 0xff && ver_release == 0xff) {
		pr_info("gmux device not present\n");
		ret = -ENODEV;
		goto err_release;
	}

	pr_info("Found gmux version %d.%d.%d\n", ver_major, ver_minor,
		ver_release);

	memset(&props, 0, sizeof(props));
	props.type = BACKLIGHT_PLATFORM;
	props.max_brightness = gmux_read32(gmux_data, GMUX_PORT_MAX_BRIGHTNESS);

	/*
	 * Currently it's assumed that the maximum brightness is less than
	 * 2^24 for compatibility with old gmux versions. Cap the max
	 * brightness at this value, but print a warning if the hardware
	 * reports something higher so that it can be fixed.
	 */
	if (WARN_ON(props.max_brightness > GMUX_MAX_BRIGHTNESS))
		props.max_brightness = GMUX_MAX_BRIGHTNESS;

	bdev = backlight_device_register("gmux_backlight", &pnp->dev,
					 gmux_data, &gmux_bl_ops, &props);
	if (IS_ERR(bdev)) {
		ret = PTR_ERR(bdev);
		goto err_release;
	}

	gmux_data->bdev = bdev;
	bdev->props.brightness = gmux_get_brightness(bdev);
	backlight_update_status(bdev);

	/*
	 * The backlight situation on Macs is complicated. If the gmux is
	 * present it's the best choice, because it always works for
	 * backlight control and supports more levels than other options.
	 * Disable the other backlight choices.
	 */
	acpi_video_dmi_promote_vendor();
#ifdef CONFIG_ACPI_VIDEO
	acpi_video_unregister();
#endif
	apple_bl_unregister();

	return 0;

err_release:
	release_region(gmux_data->iostart, gmux_data->iolen);
err_free:
	kfree(gmux_data);
	return ret;
}