[Intel-gfx] [PATCH v2 3/4] drm/i915/dp: Trigger modeset if master_crtc or slaves bitmask changes

[Manasi Navare]

Add the comparison between the current state and new_crtc_state for
newly added master_crtc pointer and slave bitmask so that
if any of those change then the curernt master-slave links have
changed and we need to reconfigure the transcoder port sync register
and hence trigger a full modeset.

Suggested-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 81e8cb9fe221..4bd23e61c6fd 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12524,6 +12524,11 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
 	PIPE_CONF_CHECK_INFOFRAME(spd);
 	PIPE_CONF_CHECK_INFOFRAME(hdmi);
 
+	if (INTEL_GEN(dev_priv) >= 11) {
+		PIPE_CONF_CHECK_I(trans_port_sync_slaves);
+		PIPE_CONF_CHECK_P(master_crtc);
+	}
+
 #undef PIPE_CONF_CHECK_X
 #undef PIPE_CONF_CHECK_I
 #undef PIPE_CONF_CHECK_BOOL
-- 
2.19.1