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This confuses the user > into thinking the display is acting weird. This occurs in eDP 1.4b > when we use proprietary INTEL AUX HDR DPCD registers to manipulate > brightness via luminance values. Make sure if minimum luminance > range is 0 we program the default luminance value to max, if > brightness level is reported as 0. The comments for patch 1 holds here as well. Thanks and Regards, Arun R Murthy -------------------- > > Signed-off-by: Suraj Kandpal > --- > v1 -> v2: > - Let users set brightness to 0, make it so that it's just not > done by default (Arun) > > drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c > index aac6cdb5b69b..725370bcfa3b 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c > +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c > @@ -442,6 +442,8 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi > > panel->backlight.level = intel_dp_aux_hdr_get_backlight(connector, pipe); > panel->backlight.enabled = panel->backlight.level != 0; > + if (!panel->backlight.level) > + panel->backlight.level = panel->backlight.max; > > return 0; > }