From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Only report DRRS capability for the connector if its fixed_modes
list contains at least two modes capable of seamless DRRS switch
between them.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_panel.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 41cec9dc4223..d18c56cf957d 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -147,10 +147,25 @@ int intel_panel_get_modes(struct intel_connector *connector)
return num_modes;
}
+static bool has_drrs_modes(struct intel_connector *connector)
+{
+ const struct drm_display_mode *mode1;
+
+ list_for_each_entry(mode1, &connector->panel.fixed_modes, head) {
+ const struct drm_display_mode *mode2 = mode1;
+
+ list_for_each_entry_continue(mode2, &connector->panel.fixed_modes, head) {
+ if (is_alt_drrs_mode(mode1, mode2))
+ return true;
+ }
+ }
+
+ return false;
+}
+
enum drrs_type intel_panel_drrs_type(struct intel_connector *connector)
{
- if (list_empty(&connector->panel.fixed_modes) ||
- list_is_singular(&connector->panel.fixed_modes))
+ if (!has_drrs_modes(connector))
return DRRS_TYPE_NONE;
return connector->panel.vbt.drrs_type;
--
2.35.1
