struct intel_connector *connector,
bool irq_received)
{
+ struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
struct drm_modeset_acquire_ctx ctx;
enum intel_hotplug_state state;
int ret;
drm_modeset_acquire_fini(&ctx);
WARN(ret, "Acquiring modeset locks failed with %i\n", ret);
+ /*
+ * Unpowered type-c dongles can take some time to boot and be
+ * responsible, so here giving some time to those dongles to power up
+ * and then retrying the probe.
+ *
+ * On many platforms the HDMI live state signal is known to be
+ * unreliable, so we can't use it to detect if a sink is connected or
+ * not. Instead we detect if it's connected based on whether we can
+ * read the EDID or not. That in turn has a problem during disconnect,
+ * since the HPD interrupt may be raised before the DDC lines get
+ * disconnected (due to how the required length of DDC vs. HPD
+ * connector pins are specified) and so we'll still be able to get a
+ * valid EDID. To solve this schedule another detection cycle if this
+ * time around we didn't detect any change in the sink's connection
+ * status.
+ */
+ if (state == INTEL_HOTPLUG_UNCHANGED && irq_received &&
+ !dig_port->dp.is_mst)
+ state = INTEL_HOTPLUG_RETRY;
+
return state;
}
drm_modeset_acquire_fini(&ctx);
WARN(ret, "Acquiring modeset locks failed with %i\n", ret);
+ /*
+ * Keeping it consistent with intel_ddi_hotplug() and
+ * intel_hdmi_hotplug().
+ */
+ if (state == INTEL_HOTPLUG_UNCHANGED && irq_received)
+ state = INTEL_HOTPLUG_RETRY;
+
return state;
}
DRM_DEBUG_KMS("CEC notifier get failed\n");
}
+static enum intel_hotplug_state
+intel_hdmi_hotplug(struct intel_encoder *encoder,
+ struct intel_connector *connector, bool irq_received)
+{
+ enum intel_hotplug_state state;
+
+ state = intel_encoder_hotplug(encoder, connector, irq_received);
+
+ /*
+ * On many platforms the HDMI live state signal is known to be
+ * unreliable, so we can't use it to detect if a sink is connected or
+ * not. Instead we detect if it's connected based on whether we can
+ * read the EDID or not. That in turn has a problem during disconnect,
+ * since the HPD interrupt may be raised before the DDC lines get
+ * disconnected (due to how the required length of DDC vs. HPD
+ * connector pins are specified) and so we'll still be able to get a
+ * valid EDID. To solve this schedule another detection cycle if this
+ * time around we didn't detect any change in the sink's connection
+ * status.
+ */
+ if (state == INTEL_HOTPLUG_UNCHANGED && irq_received)
+ state = INTEL_HOTPLUG_RETRY;
+
+ return state;
+}
+
void intel_hdmi_init(struct drm_i915_private *dev_priv,
i915_reg_t hdmi_reg, enum port port)
{
&intel_hdmi_enc_funcs, DRM_MODE_ENCODER_TMDS,
"HDMI %c", port_name(port));
- intel_encoder->hotplug = intel_encoder_hotplug;
+ intel_encoder->hotplug = intel_hdmi_hotplug;
intel_encoder->compute_config = intel_hdmi_compute_config;
if (HAS_PCH_SPLIT(dev_priv)) {
intel_encoder->disable = pch_disable_hdmi;