On shared (Thunderbolt) links with DP tunnels, the modeset may need to
be retried on all connectors on the link due to a link BW limitation
arising only after the atomic check phase. To support this add a helper
function queuing a work to retry the modeset on a given port's connector
and at the same time any MST connector with streams through the same
port. A follow-up change enabling the DP tunnel Bandwidth Allocation
Mode will take this into use.
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 5 +-
drivers/gpu/drm/i915/display/intel_dp.c | 55 ++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_dp.h | 8 +++
.../drm/i915/display/intel_dp_link_training.c | 3 +-
drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 +
5 files changed, 67 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index a92e959c8ac7b..0caebbb3e2dbb 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8060,8 +8060,9 @@ void intel_hpd_poll_fini(struct drm_i915_private *i915)
/* Kill all the work that may have been queued by hpd. */
drm_connector_list_iter_begin(&i915->drm, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
- if (connector->modeset_retry_work.func)
- cancel_work_sync(&connector->modeset_retry_work);
+ if (connector->modeset_retry_work.func &&
+ cancel_work_sync(&connector->modeset_retry_work))
+ drm_connector_put(&connector->base);
if (connector->hdcp.shim) {
cancel_delayed_work_sync(&connector->hdcp.check_work);
cancel_work_sync(&connector->hdcp.prop_work);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index ab415f41924d7..4e36c2c39888e 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2837,6 +2837,50 @@ intel_dp_audio_compute_config(struct intel_encoder *encoder,
intel_dp_is_uhbr(pipe_config);
}
+void intel_dp_queue_modeset_retry_work(struct intel_connector *connector)
+{
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
+
+ drm_connector_get(&connector->base);
+ if (!queue_work(i915->unordered_wq, &connector->modeset_retry_work))
+ drm_connector_put(&connector->base);
+}
+
+void
+intel_dp_queue_modeset_retry_for_link(struct intel_atomic_state *state,
+ struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state,
+ const struct drm_connector_state *conn_state)
+{
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+ struct intel_connector *connector;
+ struct intel_digital_connector_state *iter_conn_state;
+ struct intel_dp *intel_dp;
+ int i;
+
+ if (conn_state) {
+ connector = to_intel_connector(conn_state->connector);
+ intel_dp_queue_modeset_retry_work(connector);
+
+ return;
+ }
+
+ if (drm_WARN_ON(&i915->drm,
+ !intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST)))
+ return;
+
+ intel_dp = enc_to_intel_dp(encoder);
+
+ for_each_new_intel_connector_in_state(state, connector, iter_conn_state, i) {
+ (void)iter_conn_state;
+
+ if (connector->mst_port != intel_dp)
+ continue;
+
+ intel_dp_queue_modeset_retry_work(connector);
+ }
+}
+
int
intel_dp_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
@@ -6436,6 +6480,14 @@ static void intel_dp_modeset_retry_work_fn(struct work_struct *work)
mutex_unlock(&connector->dev->mode_config.mutex);
/* Send Hotplug uevent so userspace can reprobe */
drm_kms_helper_connector_hotplug_event(connector);
+
+ drm_connector_put(connector);
+}
+
+void intel_dp_init_modeset_retry_work(struct intel_connector *connector)
+{
+ INIT_WORK(&connector->modeset_retry_work,
+ intel_dp_modeset_retry_work_fn);
}
bool
@@ -6452,8 +6504,7 @@ intel_dp_init_connector(struct intel_digital_port *dig_port,
int type;
/* Initialize the work for modeset in case of link train failure */
- INIT_WORK(&intel_connector->modeset_retry_work,
- intel_dp_modeset_retry_work_fn);
+ intel_dp_init_modeset_retry_work(intel_connector);
if (drm_WARN(dev, dig_port->max_lanes < 1,
"Not enough lanes (%d) for DP on [ENCODER:%d:%s]\n",
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 530cc97bc42f4..105c2086310db 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -23,6 +23,8 @@ struct intel_digital_port;
struct intel_dp;
struct intel_encoder;
+struct work_struct;
+
struct link_config_limits {
int min_rate, max_rate;
int min_lane_count, max_lane_count;
@@ -43,6 +45,12 @@ void intel_dp_adjust_compliance_config(struct intel_dp *intel_dp,
bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state);
int intel_dp_min_bpp(enum intel_output_format output_format);
+void intel_dp_init_modeset_retry_work(struct intel_connector *connector);
+void intel_dp_queue_modeset_retry_work(struct intel_connector *connector);
+void intel_dp_queue_modeset_retry_for_link(struct intel_atomic_state *state,
+ struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state,
+ const struct drm_connector_state *conn_state);
bool intel_dp_init_connector(struct intel_digital_port *dig_port,
struct intel_connector *intel_connector);
void intel_dp_set_link_params(struct intel_dp *intel_dp,
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index 1abfafbbfa757..7b140cbf8dd31 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -1075,7 +1075,6 @@ static void intel_dp_schedule_fallback_link_training(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state)
{
struct intel_connector *intel_connector = intel_dp->attached_connector;
- struct drm_i915_private *i915 = dp_to_i915(intel_dp);
if (!intel_digital_port_connected(&dp_to_dig_port(intel_dp)->base)) {
lt_dbg(intel_dp, DP_PHY_DPRX, "Link Training failed on disconnected sink.\n");
@@ -1093,7 +1092,7 @@ static void intel_dp_schedule_fallback_link_training(struct intel_dp *intel_dp,
}
/* Schedule a Hotplug Uevent to userspace to start modeset */
- queue_work(i915->unordered_wq, &intel_connector->modeset_retry_work);
+ intel_dp_queue_modeset_retry_work(intel_connector);
}
/* Perform the link training on all LTTPRs and the DPRX on a link. */
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 5fa25a5a36b55..b15e43ebf138b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -1542,6 +1542,8 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
intel_connector->port = port;
drm_dp_mst_get_port_malloc(port);
+ intel_dp_init_modeset_retry_work(intel_connector);
+
intel_connector->dp.dsc_decompression_aux = drm_dp_mst_dsc_aux_for_port(port);
intel_dp_mst_read_decompression_port_dsc_caps(intel_dp, intel_connector);
intel_connector->dp.dsc_hblank_expansion_quirk =
--
2.39.2
