Commit 9f9cd7ee authored by Aaron Lu's avatar Aaron Lu Committed by Rafael J. Wysocki

ACPI / Thermal / video: fix max_level incorrect value

commit 05950094 (ACPI/video: export acpi_video_get_levels)
mistakenly dropped the correct value of max_level and that caused the
set_level function following failed and the acpi_video backlight interface
didn't get created. Fix this by passing back the correct max_level value.

While at it, also fix the param used in acpi_video_device_lcd_query_levels
where acpi_handle is expected but acpi_video_device is passed.

Fixes: 05950094 (ACPI/video: export acpi_video_get_levels)
Reported-and-tested-by: default avatarValdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: default avatarAaron Lu <aaron.lu@intel.com>
Acked-by: default avatarZhang Rui <rui.zhang@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent e4f35c13
......@@ -754,7 +754,8 @@ static int acpi_video_bqc_quirk(struct acpi_video_device *device,
}
int acpi_video_get_levels(struct acpi_device *device,
struct acpi_video_device_brightness **dev_br)
struct acpi_video_device_brightness **dev_br,
int *pmax_level)
{
union acpi_object *obj = NULL;
int i, max_level = 0, count = 0, level_ac_battery = 0;
......@@ -841,6 +842,8 @@ int acpi_video_get_levels(struct acpi_device *device,
br->count = count;
*dev_br = br;
if (pmax_level)
*pmax_level = max_level;
out:
kfree(obj);
......@@ -869,7 +872,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
struct acpi_video_device_brightness *br = NULL;
int result = -EINVAL;
result = acpi_video_get_levels(device->dev, &br);
result = acpi_video_get_levels(device->dev, &br, &max_level);
if (result)
return result;
device->brightness = br;
......@@ -1737,7 +1740,7 @@ static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video)
mutex_lock(&video->device_list_lock);
list_for_each_entry(dev, &video->video_device_list, entry) {
if (!acpi_video_device_lcd_query_levels(dev, &levels))
if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels))
kfree(levels);
}
mutex_unlock(&video->device_list_lock);
......
......@@ -177,7 +177,7 @@ static int int3406_thermal_probe(struct platform_device *pdev)
return -ENODEV;
d->raw_bd = bd;
ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br);
ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br, NULL);
if (ret)
return ret;
......
......@@ -51,7 +51,8 @@ extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
*/
extern bool acpi_video_handles_brightness_key_presses(void);
extern int acpi_video_get_levels(struct acpi_device *device,
struct acpi_video_device_brightness **dev_br);
struct acpi_video_device_brightness **dev_br,
int *pmax_level);
#else
static inline int acpi_video_register(void) { return 0; }
static inline void acpi_video_unregister(void) { return; }
......@@ -72,7 +73,8 @@ static inline bool acpi_video_handles_brightness_key_presses(void)
return false;
}
static inline int acpi_video_get_levels(struct acpi_device *device,
struct acpi_video_device_brightness **dev_br)
struct acpi_video_device_brightness **dev_br,
int *pmax_level)
{
return -ENODEV;
}
......
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