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drm/i915: add DisplayPort CEC-Tunneling-over-AUX support 

Implement support for this DisplayPort feature.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180711132909.25409-4-hverkuil@xs4all.nl
This commit is contained in:
Hans Verkuil 2018-07-11 15:29:09 +02:00 committed by Ville Syrjälä
parent d2e2d26521
commit 82e00d1136
1 changed files with 15 additions and 2 deletions
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17
drivers/gpu/drm/i915/intel_dp.c
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@ -4495,6 +4495,9 @@ intel_dp_short_pulse(struct intel_dp *intel_dp)
DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
}
/* Handle CEC interrupts, if any */
drm_dp_cec_irq(&intel_dp->aux);
/* defer to the hotplug work for link retraining if needed */
if (intel_dp_needs_link_retrain(intel_dp))
return false;
@ -4809,6 +4812,7 @@ intel_dp_set_edid(struct intel_dp *intel_dp)
intel_connector->detect_edid = edid;
intel_dp->has_audio = drm_detect_monitor_audio(edid);
drm_dp_cec_set_edid(&intel_dp->aux, edid);
}
static void
@ -4816,6 +4820,7 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
{
struct intel_connector *intel_connector = intel_dp->attached_connector;
drm_dp_cec_unset_edid(&intel_dp->aux);
kfree(intel_connector->detect_edid);
intel_connector->detect_edid = NULL;
@ -5004,6 +5009,7 @@ static int
intel_dp_connector_register(struct drm_connector *connector)
{
struct intel_dp *intel_dp = intel_attached_dp(connector);
struct drm_device *dev = connector->dev;
int ret;
ret = intel_connector_register(connector);
@ -5016,13 +5022,20 @@ intel_dp_connector_register(struct drm_connector *connector)
intel_dp->aux.name, connector->kdev->kobj.name);
intel_dp->aux.dev = connector->kdev;
return drm_dp_aux_register(&intel_dp->aux);
ret = drm_dp_aux_register(&intel_dp->aux);
if (!ret)
drm_dp_cec_register_connector(&intel_dp->aux,
connector->name, dev->dev);
return ret;
}
static void
intel_dp_connector_unregister(struct drm_connector *connector)
{
drm_dp_aux_unregister(&intel_attached_dp(connector)->aux);
struct intel_dp *intel_dp = intel_attached_dp(connector);
drm_dp_cec_unregister_connector(&intel_dp->aux);
drm_dp_aux_unregister(&intel_dp->aux);
intel_connector_unregister(connector);
}