Check if fastset is allowed by external dependencies like other pipes
and transcoders.
Right now this patch only forces a fullmodeset in MST slaves of MST
masters that needs a fullmodeset but it will be needed for port sync
as well.
v3:
- moved handling to intel_atomic_check() this way is guarantee that
all pipes will have its state computed
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 | 63 ++++++++++++++++----
1 file changed, 50 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index f1c0687bf69b..2627a7bcb45c 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13941,19 +13941,6 @@ static void intel_crtc_check_fastset(const struct
intel_crtc_state *old_crtc_sta
new_crtc_state->uapi.mode_changed = false;
new_crtc_state->update_pipe = true;
-
- /*
- * If we're not doing the full modeset we want to
- * keep the current M/N values as they may be
- * sufficiently different to the computed values
- * to cause problems.
- *
- * FIXME: should really copy more fuzzy state here
- */
- new_crtc_state->fdi_m_n = old_crtc_state->fdi_m_n;
- new_crtc_state->dp_m_n = old_crtc_state->dp_m_n;
- new_crtc_state->dp_m2_n2 = old_crtc_state->dp_m2_n2;
- new_crtc_state->has_drrs = old_crtc_state->has_drrs;
}
static int intel_crtc_add_planes_to_state(struct intel_atomic_state *state,
@@ -14121,6 +14108,56 @@ static int intel_atomic_check(struct drm_device *dev,
any_ms = true;
}
+ /**
+ * 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.
+ */
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ struct intel_crtc_state *new_crtc_state_iter;
+ struct intel_crtc *crtc_iter;
+ int j;
+
+ if (!intel_dp_mst_is_slave_trans(new_crtc_state) ||
+ needs_modeset(new_crtc_state))
+ continue;
+
+ for_each_new_intel_crtc_in_state(state, crtc_iter,
+ new_crtc_state_iter, j) {
+ if (new_crtc_state->mst_master_transcoder !=
+ new_crtc_state_iter->cpu_transcoder)
+ continue;
+
+ if (needs_modeset(new_crtc_state_iter)) {
+ new_crtc_state->uapi.mode_changed = true;
+ new_crtc_state->update_pipe = false;
+ }
+ break;
+ }
+ }
+
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ if (needs_modeset(new_crtc_state))
+ continue;
+
+ /*
+ * If we're not doing the full modeset we want to
+ * keep the current M/N values as they may be
+ * sufficiently different to the computed values
+ * to cause problems.
+ *
+ * FIXME: should really copy more fuzzy state here
+ */
+ new_crtc_state->fdi_m_n = old_crtc_state->fdi_m_n;
+ new_crtc_state->dp_m_n = old_crtc_state->dp_m_n;
+ new_crtc_state->dp_m2_n2 = old_crtc_state->dp_m2_n2;
+ new_crtc_state->has_drrs = old_crtc_state->has_drrs;
+ }
+
if (any_ms && !check_digital_port_conflicts(state)) {
DRM_DEBUG_KMS("rejecting conflicting digital port
configuration\n");
ret = EINVAL;
--
2.24.1
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