Atm, drm_dp_remove_payload() uses the same payload state to both get the vc_start_slot required for the payload removal DPCD message and to deduct time_slots from vc_start_slot of all payloads after the one being removed.
The above isn't always correct, as vc_start_slot must be the up-to-date version contained in the new payload state, but time_slots must be the one used when the payload was previously added, contained in the old payload state. The new payload's time_slots can change vs. the old one if the current atomic commit changes the corresponding mode.
This patch let's drivers pass the old and new payload states to drm_dp_remove_payload(), but keeps these the same for now in all drivers not to change the behavior. A follow-up i915 patch will pass in that driver the correct old and new states to the function.
Cc: Lyude Paul lyude@redhat.com Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Ben Skeggs bskeggs@redhat.com Cc: Karol Herbst kherbst@redhat.com Cc: Harry Wentland harry.wentland@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: Wayne Lin Wayne.Lin@amd.com Cc: stable@vger.kernel.org # 6.1 Cc: dri-devel@lists.freedesktop.org Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com Reviewed-by: Lyude Paul lyude@redhat.com Signed-off-by: Imre Deak imre.deak@intel.com --- .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 2 +- drivers/gpu/drm/display/drm_dp_mst_topology.c | 26 ++++++++++--------- drivers/gpu/drm/i915/display/intel_dp_mst.c | 4 ++- drivers/gpu/drm/nouveau/dispnv50/disp.c | 2 +- include/drm/display/drm_dp_mst_helper.h | 3 ++- 5 files changed, 21 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index a50319fc42b11..180d3893b68da 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -208,7 +208,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table( if (enable) drm_dp_add_payload_part1(mst_mgr, mst_state, payload); else - drm_dp_remove_payload(mst_mgr, mst_state, payload); + drm_dp_remove_payload(mst_mgr, mst_state, payload, payload);
/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or * AUX message. The sequence is slot 1-63 allocated sequence for each diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index 847c10aa2098c..1990ff5dc7ddd 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -3342,7 +3342,8 @@ EXPORT_SYMBOL(drm_dp_add_payload_part1); * drm_dp_remove_payload() - Remove an MST payload * @mgr: Manager to use. * @mst_state: The MST atomic state - * @payload: The payload to write + * @old_payload: The payload with its old state + * @new_payload: The payload to write * * Removes a payload from an MST topology if it was successfully assigned a start slot. Also updates * the starting time slots of all other payloads which would have been shifted towards the start of @@ -3350,36 +3351,37 @@ EXPORT_SYMBOL(drm_dp_add_payload_part1); */ void drm_dp_remove_payload(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, - struct drm_dp_mst_atomic_payload *payload) + const struct drm_dp_mst_atomic_payload *old_payload, + struct drm_dp_mst_atomic_payload *new_payload) { struct drm_dp_mst_atomic_payload *pos; bool send_remove = false;
/* We failed to make the payload, so nothing to do */ - if (payload->vc_start_slot == -1) + if (new_payload->vc_start_slot == -1) return;
mutex_lock(&mgr->lock); - send_remove = drm_dp_mst_port_downstream_of_branch(payload->port, mgr->mst_primary); + send_remove = drm_dp_mst_port_downstream_of_branch(new_payload->port, mgr->mst_primary); mutex_unlock(&mgr->lock);
if (send_remove) - drm_dp_destroy_payload_step1(mgr, mst_state, payload); + drm_dp_destroy_payload_step1(mgr, mst_state, new_payload); else drm_dbg_kms(mgr->dev, "Payload for VCPI %d not in topology, not sending remove\n", - payload->vcpi); + new_payload->vcpi);
list_for_each_entry(pos, &mst_state->payloads, next) { - if (pos != payload && pos->vc_start_slot > payload->vc_start_slot) - pos->vc_start_slot -= payload->time_slots; + if (pos != new_payload && pos->vc_start_slot > new_payload->vc_start_slot) + pos->vc_start_slot -= old_payload->time_slots; } - payload->vc_start_slot = -1; + new_payload->vc_start_slot = -1;
mgr->payload_count--; - mgr->next_start_slot -= payload->time_slots; + mgr->next_start_slot -= old_payload->time_slots;
- if (payload->delete) - drm_dp_mst_put_port_malloc(payload->port); + if (new_payload->delete) + drm_dp_mst_put_port_malloc(new_payload->port); } EXPORT_SYMBOL(drm_dp_remove_payload);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index f3cb12dcfe0a7..dc4e5ff1dbb31 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -526,6 +526,8 @@ static void intel_mst_disable_dp(struct intel_atomic_state *state, to_intel_connector(old_conn_state->connector); struct drm_dp_mst_topology_state *mst_state = drm_atomic_get_mst_topology_state(&state->base, &intel_dp->mst_mgr); + struct drm_dp_mst_atomic_payload *payload = + drm_atomic_get_mst_payload_state(mst_state, connector->port); struct drm_i915_private *i915 = to_i915(connector->base.dev);
drm_dbg_kms(&i915->drm, "active links %d\n", @@ -534,7 +536,7 @@ static void intel_mst_disable_dp(struct intel_atomic_state *state, intel_hdcp_disable(intel_mst->connector);
drm_dp_remove_payload(&intel_dp->mst_mgr, mst_state, - drm_atomic_get_mst_payload_state(mst_state, connector->port)); + payload, payload);
intel_audio_codec_disable(encoder, old_crtc_state, old_conn_state); } diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index edcb2529b4025..ed9d374147b8d 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -885,7 +885,7 @@ nv50_msto_prepare(struct drm_atomic_state *state,
// TODO: Figure out if we want to do a better job of handling VCPI allocation failures here? if (msto->disabled) { - drm_dp_remove_payload(mgr, mst_state, payload); + drm_dp_remove_payload(mgr, mst_state, payload, payload);
nvif_outp_dp_mst_vcpi(&mstm->outp->outp, msto->head->base.index, 0, 0, 0, 0); } else { diff --git a/include/drm/display/drm_dp_mst_helper.h b/include/drm/display/drm_dp_mst_helper.h index 41fd8352ab656..f5eb9aa152b14 100644 --- a/include/drm/display/drm_dp_mst_helper.h +++ b/include/drm/display/drm_dp_mst_helper.h @@ -841,7 +841,8 @@ int drm_dp_add_payload_part2(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_atomic_payload *payload); void drm_dp_remove_payload(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state, - struct drm_dp_mst_atomic_payload *payload); + const struct drm_dp_mst_atomic_payload *old_payload, + struct drm_dp_mst_atomic_payload *new_payload);
int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr);