[PATCH v3 4/6] drm/i915: Move DP modeset_retry_work into intel_dp

[Gil Dekel]

Currently, link-training fallback is only implemented for SST, so having
modeset_retry_work in intel_connector makes sense. However, we hope to
implement link training fallback for MST in a follow-up patchset, so
moving modeset_retry_work to indel_dp will make handling both SST and
MST connectors simpler. This patch does exactly that, and updates all
modeset_retry_work dependencies to use an intel_dp instead.

Credit: this patch is a rebase of Lyude Pual's original patch:
https://patchwork.freedesktop.org/patch/216627/?series=41576&rev=3

Change-Id: I3d80d58b05efe7b07450fb800c438c6e2a34f30c
Signed-off-by: Gil Dekel <gildekel at chromium.org>
---
 drivers/gpu/drm/i915/display/intel_display.c       | 14 +++++++++++---
 drivers/gpu/drm/i915/display/intel_display_types.h |  6 +++---
 drivers/gpu/drm/i915/display/intel_dp.c            | 11 ++++-------
 .../gpu/drm/i915/display/intel_dp_link_training.c  |  3 +--
 4 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index f387215f713af..8e3c7abda3193 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8937,20 +8937,28 @@ void intel_display_resume(struct drm_device *dev)

 static void intel_hpd_poll_fini(struct drm_i915_private *i915)
 {
-	struct intel_connector *connector;
 	struct drm_connector_list_iter conn_iter;
+	struct intel_connector *connector;
+	struct intel_dp *intel_dp;
+	struct intel_encoder *encoder;

 	/* 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->hdcp.shim) {
 			cancel_delayed_work_sync(&connector->hdcp.check_work);
 			cancel_work_sync(&connector->hdcp.prop_work);
 		}
 	}
 	drm_connector_list_iter_end(&conn_iter);
+
+	for_each_intel_dp(&i915->drm, encoder) {
+		if (encoder->type == DRM_MODE_CONNECTOR_eDP ||
+		    encoder->type == DRM_MODE_CONNECTOR_DisplayPort) {
+			intel_dp = enc_to_intel_dp(encoder);
+			cancel_work_sync(&intel_dp->modeset_retry_work);
+		}
+	}
 }

 /* part #1: call before irq uninstall */
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 4b88f4d60a81f..9181a2fef81e0 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -608,9 +608,6 @@ struct intel_connector {

 	struct intel_dp *mst_port;

-	/* Work struct to schedule a uevent on link train failure */
-	struct work_struct modeset_retry_work;
-
 	struct intel_hdcp hdcp;
 };

@@ -1724,6 +1721,9 @@ struct intel_dp {
 	/* Displayport compliance testing */
 	struct intel_dp_compliance compliance;

+	/* Work struct to schedule a uevent on link train failure */
+	struct work_struct modeset_retry_work;
+
 	/* Downstream facing port caps */
 	struct {
 		int min_tmds_clock, max_tmds_clock;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 9a5bcd630068e..2e562e09c704e 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5323,12 +5323,9 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,

 static void intel_dp_modeset_retry_work_fn(struct work_struct *work)
 {
-	struct intel_connector *intel_connector;
-	struct drm_connector *connector;
-
-	intel_connector = container_of(work, typeof(*intel_connector),
-				       modeset_retry_work);
-	connector = &intel_connector->base;
+	struct intel_dp *intel_dp =
+		container_of(work, typeof(*intel_dp), modeset_retry_work);
+	struct drm_connector *connector = &intel_dp->attached_connector->base;
 	drm_dbg_kms(connector->dev, "[CONNECTOR:%d:%s]\n", connector->base.id,
 		    connector->name);

@@ -5358,7 +5355,7 @@ 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,
+	INIT_WORK(&intel_dp->modeset_retry_work,
 		  intel_dp_modeset_retry_work_fn);

 	if (drm_WARN(dev, dig_port->max_lanes < 1,
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 720af16a654c9..6f16609a0820b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -1107,7 +1107,6 @@ intel_dp_link_train_phy(struct intel_dp *intel_dp,
 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 intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;

 	if (intel_dp->hobl_active) {
@@ -1123,7 +1122,7 @@ static void intel_dp_schedule_fallback_link_training(struct intel_dp *intel_dp,
 	}

 	/* Schedule a Hotplug Uevent to userspace to start modeset */
-	schedule_work(&intel_connector->modeset_retry_work);
+	schedule_work(&intel_dp->modeset_retry_work);
 }

 /* Perform the link training on all LTTPRs and the DPRX on a link. */
--
Gil Dekel, Software Engineer, Google / ChromeOS Display and Graphics