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drm/i915: Fix the old vs. new epoch counter check during hotplug detect

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The old epoch counter was left uninited, so the function returned a
changed state always.

While at it debug print the old epoch counter as well.

Fixes: 35205ee9ba ("drm/i915: Send hotplug event if edid had changed")
Cc: Kunal Joshi <kunal1.joshi@intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701180001.15857-1-imre.deak@intel.com
This commit is contained in:
Imre Deak 2020-07-01 21:00:01 +03:00
parent cdf01268bc
commit c3bad0c7e5
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/display/intel_hotplug.c
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@ -279,6 +279,7 @@ intel_encoder_hotplug(struct intel_encoder *encoder,
drm_WARN_ON(dev, !mutex_is_locked(&dev->mode_config.mutex));
old_status = connector->base.status;
old_epoch_counter = connector->base.epoch_counter;
connector->base.status =
drm_helper_probe_detect(&connector->base, NULL, false);
@ -287,11 +288,12 @@ intel_encoder_hotplug(struct intel_encoder *encoder,
ret = true;
if (ret) {
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s(epoch counter %llu)\n",
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s (epoch counter %llu->%llu)\n",
connector->base.base.id,
connector->base.name,
drm_get_connector_status_name(old_status),
drm_get_connector_status_name(connector->base.status),
old_epoch_counter,
connector->base.epoch_counter);
return INTEL_HOTPLUG_CHANGED;
}