This defines the get_vrr_support hook for intel DP connector
VRR support is set to true based on the DPCD ignore MSA and
EDID monitor range
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Harry Wentland <harry.wentland@xxxxxxx>
Cc: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
Cc: Aditya Swarup <aditya.swarup@xxxxxxxxx>
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
---
.../drm/i915/display/intel_display_types.h | 3 +++
drivers/gpu/drm/i915/display/intel_dp.c | 19 +++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 5e00e611f077..cd37ee6db1ff 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1353,6 +1353,9 @@ struct intel_dp {
/* Display stream compression testing */
bool force_dsc_en;
+
+ /* DP Variable refresh rate/ Adaptive sync support */
+ bool vrr_capable;
};
enum lspcon_vendor {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 0a417cd2af2b..ccf5d868b5c1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5860,6 +5860,24 @@ static int intel_dp_get_modes(struct drm_connector *connector)
return 0;
}
+static void intel_dp_get_vrr_support(struct drm_connector *connector)
+{
+ struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
+ const struct drm_display_info *info = &connector->display_info;
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
+
+ /*
+ * DP Sink is capable of Variable refresh video timings if
+ * Ignore MSA bit is set in DPCD.
+ * EDID monitor range also should be atleast 10 for reasonable
+ * Adaptive sync/ VRR end user experience.
+ */
+ if (INTEL_GEN(dev_priv) >= 12 &&
+ drm_dp_sink_is_capable_without_timing_msa(intel_dp->dpcd) &&
+ info->monitor_range.max_vfreq - info->monitor_range.min_vfreq > 10)
+ intel_dp->vrr_capable = true;
+}
+
static int
intel_dp_connector_register(struct drm_connector *connector)
{
@@ -6756,6 +6774,7 @@ static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs =
.get_modes = intel_dp_get_modes,
.mode_valid = intel_dp_mode_valid,
.atomic_check = intel_dp_connector_atomic_check,
+ .get_adaptive_sync_support = intel_dp_get_vrr_support,
};
static const struct drm_encoder_funcs intel_dp_enc_funcs = {
--
2.19.1
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