intel_hpd_init — initializes and enables hpd support
void intel_hpd_init ( | struct drm_i915_private * dev_priv); |
This function enables the hotplug support. It requires that interrupts have
already been enabled with intel_irq_init_hw. From this point on hotplug and
poll request can run concurrently to other code, so locking rules must be
obeyed.
This is a separate step from interrupt enabling to simplify the locking rules in the driver load and resume code.