drm: panel-backlight-quirks: Add Framework 13 matte panel

The value of "min_input_signal" returned from ATIF on a Framework AMD 13
is "12". This leads to a fairly bright minimum display backlight.

Add a quirk to override that the minimum backlight PWM to "0" which
leads to a much lower minimum brightness, which is still visible.

Tested on a Framework AMD 13 BIOS 3.05 with the matte panel.

Link: https://community.frame.work/t/25711/9
Link: https://community.frame.work/t/47036
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Tested-by: Dustin L. Howett <dustin@howett.net>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241111-amdgpu-min-backlight-quirk-v7-3-f662851fda69@weissschuh.net

diff --git a/drivers/gpu/drm/drm_panel_backlight_quirks.c b/drivers/gpu/drm/drm_panel_backlight_quirks.c
index 6b8bbed77c7f1f3570a6e68c276244cfe4386f6c..f2aefff618ddbb6c2170db5c9f535f3b6a465d1d 100644 (file)
--- a/drivers/gpu/drm/drm_panel_backlight_quirks.c
+++ b/drivers/gpu/drm/drm_panel_backlight_quirks.c
@@ -17,6 +17,14 @@ struct drm_panel_min_backlight_quirk {
 };
 
 static const struct drm_panel_min_backlight_quirk drm_panel_min_backlight_quirks[] = {
+       /* 13 inch matte panel */
+       {
+               .dmi_match.field = DMI_BOARD_VENDOR,
+               .dmi_match.value = "Framework",
+               .ident.panel_id = drm_edid_encode_panel_id('B', 'O', 'E', 0x0bca),
+               .ident.name = "NE135FBM-N41",
+               .min_brightness = 0,
+       },
 };
 
 static bool drm_panel_min_backlight_quirk_matches(const struct drm_panel_min_backlight_quirk *quirk,