This screen timing requires a backlight off time of more than 100ms
from the end of the data stream to avoid screen flickering and red
light caused by screen material limitations.

Signed-off-by: Haikun Zhou <zhouhaikun5@huaqin.corp-partner.google.com>
---
 drivers/gpu/drm/panel/panel-edp.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 13fcf896ca832..436983fdd1139 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -1935,6 +1935,13 @@ static const struct panel_delay delay_200_500_e200 = {
 	.enable = 200,
 };
 
+static const struct panel_delay delay_200_500_e200_d100 = {
+	.hpd_absent = 200,
+	.unprepare = 500,
+	.enable = 200,
+	.disable = 100,
+};
+
 static const struct panel_delay delay_200_500_e200_d200 = {
 	.hpd_absent = 200,
 	.unprepare = 500,
@@ -2125,7 +2132,7 @@ static const struct edp_panel_entry edp_panels[] = {
 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0c20, &delay_200_500_e80, "NT140FHM-N47"),
 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cb6, &delay_200_500_e200, "NT116WHM-N44"),
 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cf2, &delay_200_500_e200, "NV156FHM-N4S"),
-	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cf6, &delay_200_500_e200, "NV140WUM-N64"),
+	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cf6, &delay_200_500_e200_d100, "NV140WUM-N64"),
 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cfa, &delay_200_500_e50, "NV116WHM-A4D"),
 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0d45, &delay_200_500_e80, "NV116WHM-N4B"),
 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0ddf, &delay_200_500_e80, "NV116WHM-T01"),
-- 
2.34.1

Hi,

On Thu, Feb 26, 2026 at 12:33 AM Haikun Zhou
<zhouhaikun5@huaqin.corp-partner.google.com> wrote:
>
> This screen timing requires a backlight off time of more than 100ms
> from the end of the data stream to avoid screen flickering and red
> light caused by screen material limitations.
>
> Signed-off-by: Haikun Zhou <zhouhaikun5@huaqin.corp-partner.google.com>
> ---
>  drivers/gpu/drm/panel/panel-edp.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)

Reviewed-by: Douglas Anderson <dianders@chromium.org>

...and pushed to drm-misc-next:

[1/1] drm/panel-edp: Change BOE NV140WUM-N64 timings
      commit: bbe814bcb961ed2f30706ffdc806f18150709d2d