diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/video.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_opregion.c | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index fb9ffe9adc64..5bb1278e9324 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -241,13 +241,14 @@ static bool acpi_video_use_native_backlight(void) return use_native_backlight_dmi; } -static bool acpi_video_verify_backlight_support(void) +bool acpi_video_verify_backlight_support(void) { if (acpi_osi_is_win8() && acpi_video_use_native_backlight() && backlight_device_registered(BACKLIGHT_RAW)) return false; return acpi_video_backlight_support(); } +EXPORT_SYMBOL_GPL(acpi_video_verify_backlight_support); /* backlight device sysfs support */ static int acpi_video_get_brightness(struct backlight_device *bd) diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index 2e2c71fcc9ed..4f6b53998d79 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -403,6 +403,15 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); + /* + * If the acpi_video interface is not supposed to be used, don't + * bother processing backlight level change requests from firmware. + */ + if (!acpi_video_verify_backlight_support()) { + DRM_DEBUG_KMS("opregion backlight request ignored\n"); + return 0; + } + if (!(bclp & ASLE_BCLP_VALID)) return ASLC_BACKLIGHT_FAILED; |