• Hans de Goede's avatar
    acpi-video-detect: video: Make video_detect code part of the video module · 14ca7a47
    Hans de Goede authored
    This is a preparation patch for the backlight interface selection logic
    cleanup, there are 2 reasons to not always build the video_detect code
    into the kernel:
    
    1) In order for the video_detect.c to also deal with / select native
    backlight interfaces on win8 systems, instead of doing this in video.c
    where it does not belong, video_detect.c needs to call into the backlight
    class code. Which cannot be done if it is builtin and the blacklight class
    is not.
    
    2) Currently all the platform/x86 drivers which have quirks to prefer
    the vendor driver over acpi-video call acpi_video_unregister_backlight()
    to remove the acpi-video backlight interface, this logic really belongs
    in video_detect.c, which will cause video_detect.c to depend on symbols of
    video.c and video.c already depends on video_detect.c symbols, so they
    really need to be a single module.
    
    Note that this commits make 2 changes so as to maintain 100% kernel
    commandline compatibility:
    
    1) The __setup call for the acpi_backlight= handling is moved to
       acpi/util.c as __setup may only be used by code which is alwasy builtin
    2) video.c is renamed to acpi_video.c so that it can be combined with
       video_detect.c into video.ko
    
    This commit also makes changes to drivers/platform/x86/Kconfig to ensure
    that drivers which use acpi_video_backlight_support() from video_detect.c,
    will not be built-in when acpi_video is not built in. This also changes
    some "select" uses to "depends on" to avoid dependency loops.
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Acked-by: default avatarDarren Hart <dvhart@linux.intel.com>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    14ca7a47
Makefile 2.64 KB