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ACPI / video: Revert "thinkpad_acpi: Use acpi_video_handles_brightness_key_presses()"

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acpi_video_handles_brightness_key_presses()'s may return false if the i915
driver is not loaded yet when thinkpad_acpi loads, and then return true
after the i915 driver has loaded. This means that thinkpad_acpi cannot
use it as is since thinkpad_acpi caches the return value.

This reverts commit 7714687a2b ("thinkpad_acpi: Use
acpi_video_handles_brightness_key_presses()").

Fixes: 7714687a2b "thinkpad_acpi: Use acpi_video_handles_brightness_key_presses()"
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Hans de Goede 2016-01-14 09:41:48 +01:00 committed by Rafael J. Wysocki
parent 382d11639f
commit 95565f8841
1 changed files with 1 additions and 1 deletions
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2
drivers/platform/x86/thinkpad_acpi.c
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@ -3488,7 +3488,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
/* Do not issue duplicate brightness change events to
* userspace. tpacpi_detect_brightness_capabilities() must have
* been called before this point */
if (acpi_video_handles_brightness_key_presses()) {
if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
pr_info("This ThinkPad has standard ACPI backlight "
"brightness control, supported by the ACPI "
"video driver\n");