drm/i915: Disable port sync when bigjoiner is used

[linux-stable] / drivers / gpu / drm / i915 / display / intel_ddi.c

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 12a29363e5dfe493a724afddba08f38228fc09fb..31aa5d54fdf075280e67584a70808aae7ad44f27 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4229,7 +4229,12 @@ static bool m_n_equal(const struct intel_link_m_n *m_n_1,
 static bool crtcs_port_sync_compatible(const struct intel_crtc_state *crtc_state1,
                                       const struct intel_crtc_state *crtc_state2)
 {
+       /*
+        * FIXME the modeset sequence is currently wrong and
+        * can't deal with bigjoiner + port sync at the same time.
+        */
        return crtc_state1->hw.active && crtc_state2->hw.active &&
+               !crtc_state1->bigjoiner_pipes && !crtc_state2->bigjoiner_pipes &&
                crtc_state1->output_types == crtc_state2->output_types &&
                crtc_state1->output_format == crtc_state2->output_format &&
                crtc_state1->lane_count == crtc_state2->lane_count &&