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asus-wmi: control backlight power through WMI, not ACPI

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BugLink: https://bugs.launchpad.net/bugs/1000146

Some h/w that can adjust screen brightness through ACPI functions, but
can't turn on/off the backlight power correctly. So, we list those h/w in
quirks and try to turn on/off the backlight power through WMI.
Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
AceLan Kao 2012-06-13 09:32:06 +02:00 • committed by Matthew Garrett
parent e052067df0
commit 272c77d556
3 changed files with 34 additions and 1 deletions
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9
drivers/platform/x86/asus-wmi.c
View file

@ -47,6 +47,9 @@
#include <linux/thermal.h> #include <linux/thermal.h>
#include <acpi/acpi_bus.h> #include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h> #include <acpi/acpi_drivers.h>
#ifdef CONFIG_ACPI_VIDEO
#include <acpi/video.h>
#endif
#include "asus-wmi.h" #include "asus-wmi.h"
@ -1676,7 +1679,13 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err) if (err)
goto fail_rfkill; goto fail_rfkill;
if (asus->driver->quirks->wmi_backlight_power)
acpi_video_dmi_promote_vendor();
if (!acpi_video_backlight_support()) { if (!acpi_video_backlight_support()) {
#ifdef CONFIG_ACPI_VIDEO
pr_info("Disabling ACPI video driver\n");
acpi_video_unregister();
#endif
err = asus_wmi_backlight_init(asus); err = asus_wmi_backlight_init(asus);
if (err && err != -ENODEV) if (err && err != -ENODEV)
goto fail_backlight; goto fail_backlight;

1
drivers/platform/x86/asus-wmi.h
View file

@ -39,6 +39,7 @@ struct quirk_entry {
bool hotplug_wireless; bool hotplug_wireless;
bool scalar_panel_brightness; bool scalar_panel_brightness;
bool store_backlight_power; bool store_backlight_power;
bool wmi_backlight_power;
int wapf; int wapf;
}; };

25
drivers/platform/x86/eeepc-wmi.c
View file

@ -79,7 +79,7 @@ static const struct key_entry eeepc_wmi_keymap[] = {
{ KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */ { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
{ KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */ { KE_KEY, HOME_PRESS, { KEY_CONFIG } }, /* Home/Express gate key */
{ KE_KEY, 0xe8, { KEY_SCREENLOCK } }, { KE_KEY, 0xe8, { KEY_SCREENLOCK } },
{ KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } }, { KE_KEY, 0xe9, { KEY_DISPLAYTOGGLE } },
{ KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } }, { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
{ KE_KEY, 0xec, { KEY_CAMERA_UP } }, { KE_KEY, 0xec, { KEY_CAMERA_UP } },
{ KE_KEY, 0xed, { KEY_CAMERA_DOWN } }, { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
@ -107,6 +107,11 @@ static struct quirk_entry quirk_asus_et2012_type3 = {
.store_backlight_power = true, .store_backlight_power = true,
}; };
static struct quirk_entry quirk_asus_x101ch = {
/* We need this when ACPI function doesn't do this well */
.wmi_backlight_power = true,
};
static struct quirk_entry *quirks; static struct quirk_entry *quirks;
static void et2012_quirks(void) static void et2012_quirks(void)
@ -157,6 +162,24 @@ static struct dmi_system_id asus_quirks[] = {
}, },
.driver_data = &quirk_asus_unknown, .driver_data = &quirk_asus_unknown,
}, },
{
.callback = dmi_matched,
.ident = "ASUSTeK Computer INC. X101CH",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X101CH"),
},
.driver_data = &quirk_asus_x101ch,
},
{
.callback = dmi_matched,
.ident = "ASUSTeK Computer INC. 1015CX",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "1015CX"),
},
.driver_data = &quirk_asus_x101ch,
},
{}, {},
}; };