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| /linux/include/acpi/ |
| H A D | video.h | diff 90b066b15eda028ed44299f01236f8576dd8551d Tue Dec 22 19:09:48 CET 2015 Hans de Goede <hdegoede@redhat.com> ACPI / video: Add a acpi_video_handles_brightness_key_presses() helper
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: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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| /linux/drivers/acpi/ |
| H A D | acpi_video.c | diff 90b066b15eda028ed44299f01236f8576dd8551d Tue Dec 22 19:09:48 CET 2015 Hans de Goede <hdegoede@redhat.com> ACPI / video: Add a acpi_video_handles_brightness_key_presses() helper
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: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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