[PATCH 2/6] drm/i915: Move DP modeset retry work into intel_dp

Lyude Paul
2018-03-08T23:24:16Z

While having the modeset_retry_work in intel_connector makes sense with
SST, this paradigm doesn't make a whole ton of sense when it comes to
MST since we have to deal with multiple connectors. In most cases, it's
more useful to just use the intel_dp struct since it indicates whether
or not we're dealing with an MST device, along with being able to easily
trace the intel_dp struct back to it's respective connector (if there is
any). So, move the modeset_retry_work function out of the
intel_connector struct and into intel_dp.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 23 +++++++++++++++++++++--
drivers/gpu/drm/i915/intel_dp.c | 10 ++++------
drivers/gpu/drm/i915/intel_dp_link_training.c | 2 +-
drivers/gpu/drm/i915/intel_drv.h | 9 ++++++---
4 files changed, 32 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f424fff477f6..85d5af4e4f5b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15394,16 +15394,35 @@ static void intel_hpd_poll_fini(struct drm_device *dev)
{
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
+ struct work_struct *work;

/* Kill all the work that may have been queued by hpd. */
drm_connector_list_iter_begin(dev, &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);
}
+
+ if (connector->base.connector_type !=
+ DRM_MODE_CONNECTOR_DisplayPort)
+ continue;
+
+ if (connector->mst_port) {
+ work = &connector->mst_port->modeset_retry_work;
+ } else {
+ struct intel_encoder *intel_encoder =
+ connector->encoder;
+ struct intel_dp *intel_dp;
+
+ if (!intel_encoder)
+ continue;
+
+ intel_dp = enc_to_intel_dp(&intel_encoder->base);
+ work = &intel_dp->modeset_retry_work;
+ }
+
+ cancel_work_sync(work);
}
drm_connector_list_iter_end(&conn_iter);
}
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 4dd1b2287dd6..5abf0c95725a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6261,12 +6261,10 @@ 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;
+ struct intel_dp *intel_dp = container_of(work, typeof(*intel_dp),
+ modeset_retry_work);
+ struct drm_connector *connector = &intel_dp->attached_connector->base;

- intel_connector = container_of(work, typeof(*intel_connector),
- modeset_retry_work);
- connector = &intel_connector->base;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
connector->name);

@@ -6295,7 +6293,7 @@ intel_dp_init_connector(struct intel_digital_port *intel_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 (WARN(intel_dig_port->max_lanes < 1,
diff --git a/drivers/gpu/drm/i915/intel_dp_link_training.c b/drivers/gpu/drm/i915/intel_dp_link_training.c
index f59b59bb0a21..2cfa58ce1f95 100644
--- a/drivers/gpu/drm/i915/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/intel_dp_link_training.c
@@ -340,7 +340,7 @@ intel_dp_start_link_train(struct intel_dp *intel_dp)
intel_dp->link_rate,
intel_dp->lane_count))
/* Schedule a Hotplug Uevent to userspace to start modeset */
- schedule_work(&intel_connector->modeset_retry_work);
+ schedule_work(&intel_dp->modeset_retry_work);
} else {
DRM_ERROR("[CONNECTOR:%d:%s] Link Training failed at link rate = %d, lane count = %d",
intel_connector->base.base.id,
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 83e5ca889d9c..3700fcfddb1f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -406,14 +406,14 @@ struct intel_connector {

struct intel_dp *mst_port;

- /* Work struct to schedule a uevent on link train failure */
- struct work_struct modeset_retry_work;
-
const struct intel_hdcp_shim *hdcp_shim;
struct mutex hdcp_mutex;
uint64_t hdcp_value; /* protected by hdcp_mutex */
struct delayed_work hdcp_check_work;
struct work_struct hdcp_prop_work;
+
+ /* Work struct to schedule a uevent on link train failure */
+ struct work_struct modeset_retry_work;
};

struct intel_digital_connector_state {
@@ -1135,6 +1135,9 @@ 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;
};

struct intel_lspcon {
--
2.14.3

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