Hi! should have a chance to look at this at the start of next week

On Thu, 2023-01-26 at 11:13 +0200, Imre Deak wrote:

Add the MST topology for a CRTC to the atomic state if the driver needs to force a modeset on the CRTC after the encoder compute config functions are called.

Later the MST encoder's disable hook also adds the state, but that isn't guaranteed to work (since in that hook getting the state may fail, which can't be handled there). This should fix that, while a later patch fixes the use of the MST state in the disable hook.

v2: Add missing forward struct declartions, caught by hdrtest.

Cc: Lyude Paul lyude@redhat.com Cc: stable@vger.kernel.org # 6.1 Signed-off-by: Imre Deak imre.deak@intel.com

---

drivers/gpu/drm/i915/display/intel_display.c | 4 +++ drivers/gpu/drm/i915/display/intel_dp_mst.c | 37 ++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_dp_mst.h | 4 +++ 3 files changed, 45 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 717ca3d7890d3..d3994e2a7d636 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -5934,6 +5934,10 @@ int intel_modeset_all_pipes(struct intel_atomic_state *state, if (ret) return ret;

• ret = intel_dp_mst_add_topology_state_for_crtc(state, crtc);
  

• if (ret)
  

• 	return ret;
  

• ret = intel_atomic_add_affected_planes(state, crtc); if (ret) return ret;

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 8b0e4defa3f10..ba29c294b7c1b 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -1223,3 +1223,40 @@ bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state) return crtc_state->mst_master_transcoder != INVALID_TRANSCODER && crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder; }

+/**

• • intel_dp_mst_add_topology_state_for_crtc - add MST topology state for a CRTC
• • @state: atomic state
• • @crtc: CRTC
• • Add the MST topology state for @crtc to @state.
• • Returns 0 on success, negative error code on failure.
• */

+int intel_dp_mst_add_topology_state_for_crtc(struct intel_atomic_state *state,

• 			     struct intel_crtc *crtc)
  

+{

• struct drm_connector *_connector;
• struct drm_connector_state *conn_state;
• int i;
• for_each_new_connector_in_state(&state->base, _connector, conn_state, i) {

• struct drm_dp_mst_topology_state *mst_state;
  

• struct intel_connector *connector = to_intel_connector(_connector);
  

• if (conn_state->crtc != &crtc->base)
  

• 	continue;
  

• if (!connector->mst_port)
  

• 	continue;
  

• mst_state = drm_atomic_get_mst_topology_state(&state->base,
  

• 					      &connector->mst_port->mst_mgr);
  

• if (IS_ERR(mst_state))
  

• 	return PTR_ERR(mst_state);
  

• mst_state->pending_crtc_mask |= drm_crtc_mask(&crtc->base);
  

• }
• return 0;

+} diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.h b/drivers/gpu/drm/i915/display/intel_dp_mst.h index f7301de6cdfb3..f1815bb722672 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.h +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.h @@ -8,6 +8,8 @@ #include <linux/types.h> +struct intel_atomic_state; +struct intel_crtc; struct intel_crtc_state; struct intel_digital_port; struct intel_dp; @@ -18,5 +20,7 @@ int intel_dp_mst_encoder_active_links(struct intel_digital_port *dig_port); bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state); bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state); bool intel_dp_mst_source_support(struct intel_dp *intel_dp); +int intel_dp_mst_add_topology_state_for_crtc(struct intel_atomic_state *state,

• 			     struct intel_crtc *crtc);
  

#endif /* __INTEL_DP_MST_H__ */