Instead of using fixed 0 - 512 range use drm_luminance_range_from_static_hdr_metadata to obtain panel range. If that fails fall back to static 0 - 512.
Cc: Lyude Paul lyude@redhat.com Cc: Mika Kahola mika.kahola@intel.com Cc: Jani Nikula jani.nikula@intel.com Signed-off-by: Jouni Högander jouni.hogander@intel.com --- drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
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 fb6cf30ee628..6673af455808 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -293,8 +293,13 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi } }
- panel->backlight.max = 512; - panel->backlight.min = 0; + if (!drm_luminance_range_from_static_hdr_metadata(&connector->base, + &panel->backlight.min, + &panel->backlight.max)) { + drm_err(&i915->drm, "No backlight range data in static hdr metadata, using fixed 0,512\n"); + panel->backlight.max = 512; + panel->backlight.min = 0; + } panel->backlight.level = intel_dp_aux_hdr_get_backlight(connector, pipe); panel->backlight.enabled = panel->backlight.level != 0;