Check if fastset is allowed by external dependencies like other pipes
and transcoders.
Right now it only forces a fullmodeset when the MST master transcoder
did not changed but the pipe of the master transcoder needs a
fullmodeset so all slaves also needs to do a fullmodeset.
But it will probably be need for port sync as well.
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Cc: Lucas De Marchi <lucas.demar...@intel.com>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Manasi Navare <manasi.d.nav...@intel.com>
Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 41 ++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index 4dc48e79d14b..9729f0b299b3 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13930,11 +13930,52 @@ static int calc_watermark_data(struct
intel_atomic_state *state)
return 0;
}
+/**
+ * Check if fastset is allowed by external dependencies like other pipes and
+ * transcoders.
+ *
+ * Right now it only forces a fullmodeset when the MST master transcoder did
+ * not changed but the pipe of the master transcoder needs a fullmodeset so
+ * all slaves also needs to do a fullmodeset.
+ */
+static bool
+intel_crtc_check_external_dependencies_fastset(const struct intel_crtc_state
*old_crtc_state,
+ struct intel_crtc_state
*new_crtc_state)
+{
+ struct intel_atomic_state *state =
to_intel_atomic_state(new_crtc_state->uapi.state);
+ struct drm_i915_private *dev_priv =
to_i915(new_crtc_state->uapi.crtc->dev);
+ struct intel_crtc_state *new_crtc_state_iter;
+ struct intel_crtc *crtc_iter;
+ int i;
+
+ if (INTEL_GEN(dev_priv) < 12)
+ return true;
+
+ if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST) ||
+ intel_dp_mst_is_master_trans(new_crtc_state))
+ return true;
+
+ for_each_new_intel_crtc_in_state(state, crtc_iter, new_crtc_state_iter,
i) {
+ if (new_crtc_state_iter->cpu_transcoder !=
+ new_crtc_state->mst_master_transcoder)
+ continue;
+
+ return !needs_modeset(new_crtc_state_iter);
+ }
+
+ DRM_ERROR("Master MST transcoder of pipe not found\n");
+ return false;
+}
+
static void intel_crtc_check_fastset(const struct intel_crtc_state
*old_crtc_state,
struct intel_crtc_state *new_crtc_state)
{
if (!intel_pipe_config_compare(old_crtc_state, new_crtc_state, true))
return;
+ if (!intel_crtc_check_external_dependencies_fastset(old_crtc_state,
+ new_crtc_state))
+ return;
+
new_crtc_state->uapi.mode_changed = false;
new_crtc_state->update_pipe = true;
--
2.24.0
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