[Intel-gfx] [PATCH v2 06/29] ACPI: video: Drop backlight_device_get_by_type() call from acpi_video_get_backlight_type()

Hans de Goede
2022-07-12T19:40:10Z

All x86/ACPI kms drivers which register native/BACKLIGHT_RAW type
backlight devices call acpi_video_backlight_use_native() now. This sets
__acpi_video_get_backlight_type()'s internal static native_available flag.

This makes the backlight_device_get_by_type(BACKLIGHT_RAW) check
unnecessary.

Relying on the cached native_available value not only is simpler, it will
also work correctly in cases where then native backlight registration was
skipped because of acpi_video_backlight_use_native() returning false.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/acpi/video_detect.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 4346c990022d..c18047da9f37 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -585,8 +585,7 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native)
if (!(video_caps & ACPI_VIDEO_BACKLIGHT))
return acpi_backlight_vendor;

- if (acpi_osi_is_win8() &&
- (native_available || backlight_device_get_by_type(BACKLIGHT_RAW)))
+ if (acpi_osi_is_win8() && native_available)
return acpi_backlight_native;

return acpi_backlight_video;
--
2.36.0