The MECHREVO Yilong15Pro Series GM5HG7A with a BOE NE153QDM-NZ1
panel has an excessively high minimum screen brightness under Linux.
The lowest brightness setting remains visibly brighter than it does
under Windows.
Add a panel backlight quirk to override the minimum brightness to zero,
scoped to the specific DMI product name and BOE EDID identity.
Tested on a GM5HG7A running Ubuntu kernel 7.3.0-9-generic. With the
quirk applied, the backlight can be dimmed further while the image
remains visible. The AMDGPU driver confirms the override with:
Applying panel backlight quirk, min_brightness: 0
The quirk and commit description were prepared with ChatGPT assistance.
The submitter reviewed the change and tested the module on hardware.
Assisted-by: LLM
Signed-off-by: takanashi-tetsuya <[email protected]>
---
drivers/gpu/drm/drm_panel_backlight_quirks.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/drm_panel_backlight_quirks.c
b/drivers/gpu/drm/drm_panel_backlight_quirks.c
index e417c75..96d85d7 100644
--- a/drivers/gpu/drm/drm_panel_backlight_quirks.c
+++ b/drivers/gpu/drm/drm_panel_backlight_quirks.c
@@ -29,6 +29,16 @@ static const struct drm_get_panel_backlight_quirk
drm_panel_min_backlight_quirks
.ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E',
0x08df),
.quirk = { .force_pwm = true, },
},
+ /* MECHREVO Yilong15Pro GM5HG7A with BOE NE153QDM-NZ1 panel */
+ {
+ .dmi_match.field = DMI_SYS_VENDOR,
+ .dmi_match.value = "MECHREVO",
+ .dmi_match_other.field = DMI_PRODUCT_NAME,
+ .dmi_match_other.value = "Yilong15Pro Series GM5HG7A",
+ .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E',
0x0c8e),
+ .ident.name = "NE153QDM-NZ1",
+ .quirk = { .min_brightness = 1, },
+ },
/* 13 inch matte panel */
{
.dmi_match.field = DMI_BOARD_VENDOR,
--
2.55.0
