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    Subject[PATCH 4.19 053/133] ACPI: video: Use native backlight on Acer Aspire 5783z
    Date
    From: Hans de Goede <hdegoede@redhat.com>

    [ Upstream commit 1c8fbc1f9bfb804ef2f0d4ee9397ab800e33f23a ]

    The Acer Aspire 5783z shipped with Windows 7 and as such does not trigger
    our "win8 ready" heuristic for prefering the native backlight interface.

    Still ACPI backlight control doesn't work on this model, where as the
    native (intel_video) backlight interface does work. Add a quirk to
    force using native backlight control on this model.

    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/acpi/video_detect.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
    index 214c4e2e8ade1..5f0178967d14c 100644
    --- a/drivers/acpi/video_detect.c
    +++ b/drivers/acpi/video_detect.c
    @@ -328,6 +328,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
    DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
    },
    },
    + {
    + .callback = video_detect_force_native,
    + .ident = "Acer Aspire 5738z",
    + .matches = {
    + DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
    + DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
    + DMI_MATCH(DMI_BOARD_NAME, "JV50"),
    + },
    + },

    /*
    * Desktops which falsely report a backlight and which our heuristics
    --
    2.25.1


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