• Hans de Goede's avatar
    ACPI / video: Add a acpi_video_handles_brightness_key_presses() helper · 90b066b1
    Hans de Goede authored
    Several drivers want to know if the acpi-video is generating key-presses
    for brightness change hotkeys to avoid sending double key-events to
    userspace for these. Currently these driver use this construct for this:
    
    	if (acpi_video_get_backlight_type() == acpi_backlight_vendor)
    		report_brightness_key_event();
    
    This indirect way of detecting if acpi-video is active does not make the
    code easier to understand, and in some cases it is wrong because just
    because the preferred type != vendor does not mean that acpi-video is
    actually listening for brightness events, e.g. there may be no acpi-video
    bus on the system at all.
    
    This commit adds a acpi_video_handles_brightness_key_presses() helper
    function, making the code needing this functionality both easier to read
    and more correct.
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    90b066b1
video.h 1.57 KB