Instead of using fixed 0 - 512 range use luminance range calculated
as a part of edid parsing. As a backup fall back to static 0 - 512.
v3: Clean-ups suggested by Jani Nikula
v2: Use values calculated during edid parsing
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Cc: Mika Kahola <mika.kahola@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
.../gpu/drm/i915/display/intel_dp_aux_backlight.c | 15 +++++++++++++--
1 file changed, 13 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 c92d5bb2326a..83af95bce98d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -278,6 +278,8 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi
{
struct drm_i915_private *i915 = to_i915(connector->base.dev);
struct intel_panel *panel = &connector->panel;
+ struct drm_luminance_range_info *luminance_range =
+ &connector->base.display_info.luminance_range;
int ret;
if (panel->backlight.edp.intel.sdr_uses_aux) {
@@ -293,8 +295,17 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi
}
}
- panel->backlight.max = 512;
- panel->backlight.min = 0;
+ if (luminance_range->max_luminance) {
+ panel->backlight.max = luminance_range->max_luminance;
+ panel->backlight.min = luminance_range->min_luminance;
+ } else {
+ panel->backlight.max = 512;
+ panel->backlight.min = 0;
+ }
+
+ drm_dbg_kms(&i915->drm, "Using backlight range %d..%d\n", panel->backlight.min,
+ panel->backlight.max);
+
panel->backlight.level = intel_dp_aux_hdr_get_backlight(connector, pipe);
panel->backlight.enabled = panel->backlight.level != 0;
--
2.25.1
