From: Hans de Goede <hdegoede@xxxxxxxxxx>
[ Upstream commit f46acc1efd4b5846de9fa05f966e504f328f34a6 ]
The Dell G15 5515 has the WMI interface (and WMI call returns) expected
by the nvidia-wmi-ec-backlight interface. But the backlight class device
registered by the nvidia-wmi-ec-backlight driver does not actually work.
The amdgpu_bl0 native GPU backlight class device does actually work,
add a backlight=native DMI quirk for this.
Reported-by: Iris <pawel.js@xxxxxxxxxxxxxx>
Reviewed-by: Daniel Dadap <ddadap@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
Changes in v2:
- Add a comment that this needs to be revisited when dynamic-mux
support gets added (suggested by: Daniel Dadap)
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/acpi/video_detect.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 0ec74ab2a399..2008bba48b06 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -511,6 +511,20 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
},
},
+ /*
+ * Models which have nvidia-ec-wmi support, but should not use it.
+ * Note this indicates a likely firmware bug on these models and should
+ * be revisited if/when Linux gets support for dynamic mux mode.
+ */
+ {
+ .callback = video_detect_force_native,
+ /* Dell G15 5515 */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5515"),
+ },
+ },
+
/*
* Desktops which falsely report a backlight and which our heuristics
* for this do not catch.
--
2.35.1
