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authorAceLan Kao <acelan.kao@canonical.com>2012-03-20 09:53:09 +0100
committerMatthew Garrett <mjg@redhat.com>2012-03-26 15:05:43 -0400
commit6e0044bedc1fc94a61cc32fa25dcab9a4e4a9218 (patch)
treec3f6c0ee73a93f7ae8bb9fdfd448c189d0250511 /drivers/platform
parentc87992d1fa51a6a3d8f0e980ca4d2bdec7e78a17 (diff)
asus-wmi: store backlight power status for AIO machine
Due to some implementation reasons, ASUS ET2012 All-in-One machines can't report the correct backlight power status, it will always return 1. To track the backlight power status correctly, we have to store the status by ourselves. BTW, by the BIOS design, the backlight power will be turn on/off sequently, no matter what the value of the parameter will be. More over, the brightness adjustment command will turn on the backlight power. Those behaviors will make us fail to track the backlight power status. For example, While we are trying to turn on the backlight power, we will send out the brightness adjustment command and then trying to figure out if we have to turn on the backlight power, then send out the command. But, the real case is that, the backlight power turns on while sending the brightness adjustment command, and then we send out the command to turn on the backlight power, it actually will turn off the backlight power and the backlight power status we recorded becomes wrong. So, we have to seperate these two commands by a if statement. 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>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/asus-wmi.c33
-rw-r--r--drivers/platform/x86/asus-wmi.h2
-rw-r--r--drivers/platform/x86/eeepc-wmi.c15
3 files changed, 34 insertions, 16 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index eb114f8d39e..c4ad76ee7b5 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1076,7 +1076,12 @@ static int asus_wmi_hwmon_init(struct asus_wmi *asus)
*/
static int read_backlight_power(struct asus_wmi *asus)
{
- int ret = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_BACKLIGHT);
+ int ret;
+ if (asus->driver->quirks->store_backlight_power)
+ ret = !asus->driver->panel_power;
+ else
+ ret = asus_wmi_get_devstate_simple(asus,
+ ASUS_WMI_DEVID_BACKLIGHT);
if (ret < 0)
return ret;
@@ -1138,24 +1143,23 @@ static int update_bl_status(struct backlight_device *bd)
{
struct asus_wmi *asus = bl_get_data(bd);
u32 ctrl_param;
- int power, err;
-
- if (asus->driver->quirks->scalar_panel_brightness)
- ctrl_param = get_scalar_command(bd);
- else
- ctrl_param = bd->props.brightness;
-
- err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
- ctrl_param, NULL);
-
- if (err < 0)
- return err;
+ int power, err = 0;
power = read_backlight_power(asus);
if (power != -ENODEV && bd->props.power != power) {
ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
ctrl_param, NULL);
+ if (asus->driver->quirks->store_backlight_power)
+ asus->driver->panel_power = bd->props.power;
+ } else {
+ if (asus->driver->quirks->scalar_panel_brightness)
+ ctrl_param = get_scalar_command(bd);
+ else
+ ctrl_param = bd->props.brightness;
+
+ err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
+ ctrl_param, NULL);
}
return err;
}
@@ -1217,6 +1221,9 @@ static int asus_wmi_backlight_init(struct asus_wmi *asus)
asus->backlight_device = bd;
+ if (asus->driver->quirks->store_backlight_power)
+ asus->driver->panel_power = power;
+
bd->props.brightness = read_brightness(bd);
bd->props.power = power;
backlight_update_status(bd);
diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
index ac7dd4eaebd..35003e4f131 100644
--- a/drivers/platform/x86/asus-wmi.h
+++ b/drivers/platform/x86/asus-wmi.h
@@ -38,11 +38,13 @@ struct asus_wmi;
struct quirk_entry {
bool hotplug_wireless;
bool scalar_panel_brightness;
+ bool store_backlight_power;
};
struct asus_wmi_driver {
int wapf;
int brightness;
+ int panel_power;
const char *name;
struct module *owner;
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
index 67186e6ca28..9f8ccf9f590 100644
--- a/drivers/platform/x86/eeepc-wmi.c
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -32,6 +32,7 @@
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/dmi.h>
+#include <linux/fb.h>
#include <acpi/acpi_bus.h>
#include "asus-wmi.h"
@@ -98,8 +99,13 @@ static struct quirk_entry quirk_asus_1000h = {
.hotplug_wireless = true,
};
+static struct quirk_entry quirk_asus_et2012_type1 = {
+ .store_backlight_power = true,
+};
+
static struct quirk_entry quirk_asus_et2012_type3 = {
.scalar_panel_brightness = true,
+ .store_backlight_power = true,
};
static int dmi_matched(const struct dmi_system_id *dmi)
@@ -111,10 +117,12 @@ static int dmi_matched(const struct dmi_system_id *dmi)
if (unlikely(strncmp(model, "ET2012", 6) == 0)) {
const struct dmi_device *dev = NULL;
char oemstring[30];
- while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL,
- dev))) {
+ while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING,
+ NULL, dev))) {
if (sscanf(dev->name, "AEMS%24c", oemstring) == 1) {
- if (oemstring[18] == '3')
+ if (oemstring[18] == '1')
+ quirks = &quirk_asus_et2012_type1;
+ else if (oemstring[18] == '3')
quirks = &quirk_asus_et2012_type3;
break;
}
@@ -202,6 +210,7 @@ static int eeepc_wmi_probe(struct platform_device *pdev)
static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
{
driver->wapf = -1;
+ driver->panel_power = FB_BLANK_UNBLANK;
driver->quirks = &quirk_asus_unknown;
driver->quirks->hotplug_wireless = hotplug_wireless;
dmi_check_system(asus_quirks);