This allows to add code which limits 're'-detect() of displays to connectors
that have received an HPD event.
v2: Reordered drm_i915_private: Move hpd_event_bits to hpd state tracking.
v3: Fixed merge conflicts with previous patches, removed some noisy debug
logging as suggested by Jani Nikula.
Signed-off-by: Egbert Eich <e...@suse.de>
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_irq.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 195b9fe..c0d9fb9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -938,6 +938,7 @@ typedef struct drm_i915_private {
HPD_MARK_DISABLED = 2
} hpd_mark;
} hpd_stats[HPD_NUM_PINS];
+ u32 hpd_event_bits;
struct timer_list hotplug_reenable_timer;
int num_pch_pll;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index ae759ac..e108729 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -350,6 +350,7 @@ static void i915_hotplug_work_func(struct work_struct *work)
struct drm_connector *connector;
unsigned long irqflags;
bool hpd_disabled = false;
+ u32 hpd_event_bits;
/* HPD irq before everything is fully set up. */
if (!dev_priv->enable_hotplug_processing)
@@ -359,6 +360,9 @@ static void i915_hotplug_work_func(struct work_struct *work)
DRM_DEBUG_KMS("running encoder hotplug functions\n");
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
+
+ hpd_event_bits = dev_priv->hpd_event_bits;
+ dev_priv->hpd_event_bits = 0;
list_for_each_entry(connector, &mode_config->connector_list, head) {
intel_connector = to_intel_connector(connector);
intel_encoder = intel_connector->encoder;
@@ -373,6 +377,10 @@ static void i915_hotplug_work_func(struct work_struct
*work)
| DRM_CONNECTOR_POLL_DISCONNECT;
hpd_disabled = true;
}
+ if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
+ DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug
event.\n",
+ drm_get_connector_name(connector),
intel_encoder->hpd_pin);
+ }
}
/* if there were no outputs to poll, poll was disabled,
* therefore make sure it's enabled when disabling HPD on
@@ -636,6 +644,8 @@ static inline bool hotplug_irq_storm_detect(struct
drm_device *dev,
dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
continue;
+ dev_priv->hpd_event_bits |= (1 << i);
+
if (!time_in_range(jiffies,
dev_priv->hpd_stats[i].hpd_last_jiffies,
dev_priv->hpd_stats[i].hpd_last_jiffies
+
msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
@@ -643,6 +653,7 @@ static inline bool hotplug_irq_storm_detect(struct
drm_device *dev,
dev_priv->hpd_stats[i].hpd_cnt = 0;
} else if (dev_priv->hpd_stats[i].hpd_cnt >
HPD_STORM_THRESHOLD) {
dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
+ dev_priv->hpd_event_bits &= ~(1 << i);
DRM_DEBUG_KMS("HPD interrupt storm detected on PIN
%d\n", i);
ret = true;
} else {
--
1.8.1.4
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