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The BL_EN signal does not conform to the VESA protocol. BL_EN signal needs to be pulled high after video signal. So add prepare_to_enable to 200ms. Signed-off-by: Zhengqiao Xia --- 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/pane= l-edp.c index d58f90bc48fb..745f3e48f02a 100644 --- a/drivers/gpu/drm/panel/panel-edp.c +++ b/drivers/gpu/drm/panel/panel-edp.c @@ -1865,6 +1865,13 @@ static const struct panel_delay delay_200_500_e50 = =3D { .enable =3D 50, }; =20 +static const struct panel_delay delay_200_500_e50_p2e200 =3D { + .hpd_absent =3D 200, + .unprepare =3D 500, + .enable =3D 50, + .prepare_to_enable =3D 200, +}; + static const struct panel_delay delay_200_500_e80 =3D { .hpd_absent =3D 200, .unprepare =3D 500, @@ -2034,7 +2041,7 @@ static const struct edp_panel_entry edp_panels[] =3D { EDP_PANEL_ENTRY('C', 'M', 'N', 0x14d6, &delay_200_500_e80_d50, "N140BGA-E= A4"), EDP_PANEL_ENTRY('C', 'M', 'N', 0x14e5, &delay_200_500_e80_d50, "N140HGA-E= A1"), =20 - EDP_PANEL_ENTRY('C', 'S', 'O', 0x1200, &delay_200_500_e50, "MNC207QS1-1"), + EDP_PANEL_ENTRY('C', 'S', 'O', 0x1200, &delay_200_500_e50_p2e200, "MNC207= QS1-1"), =20 EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d51, &delay_200_500_e200, "Unknown"), EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d5b, &delay_200_500_e200, "Unknown"), --=20 2.17.1