From 14ca7a47d0ab2a7a35faab130e6d9682f8ff1a46 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Tue, 16 Jun 2015 16:27:47 +0200 Subject: acpi-video-detect: video: Make video_detect code part of the video module 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: Hans de Goede Acked-by: Darren Hart Signed-off-by: Rafael J. Wysocki --- drivers/acpi/utils.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/acpi/utils.c') diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index cd49a3982b6a..67c548ad3764 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -712,3 +712,18 @@ bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, int rev, u64 funcs) return false; } EXPORT_SYMBOL(acpi_check_dsm); + +/* + * acpi_backlight= handling, this is done here rather then in video_detect.c + * because __setup cannot be used in modules. + */ +char acpi_video_backlight_string[16]; +EXPORT_SYMBOL(acpi_video_backlight_string); + +static int __init acpi_backlight(char *str) +{ + strlcpy(acpi_video_backlight_string, str, + sizeof(acpi_video_backlight_string)); + return 1; +} +__setup("acpi_backlight=", acpi_backlight); -- cgit