43  * handlers gather the hotplug detect (HPD) information from relevant registers
72  * callback is handled by i915_digport_work_func reenabling of hpd is not
82  * @port: the hpd port to get associated pin
124  * intel_hpd_irq_storm_detect - gather stats and detect HPD IRQ storm on a pin
127  * @long_hpd: whether the HPD IRQ was long or short
129  * Gather stats about HPD IRQs from the specified @pin, and detect IRQ
147  * The HPD threshold can be controlled through i915_hpd_storm_ctl in debugfs,
155 	struct i915_hotplug *hpd = &dev_priv->hotplug;  in intel_hpd_irq_storm_detect()  local
156 	unsigned long start = hpd->stats[pin].last_jiffies;  in intel_hpd_irq_storm_detect()
159 	const int threshold = hpd->hpd_storm_threshold;  in intel_hpd_irq_storm_detect()
167 		hpd->stats[pin].last_jiffies = jiffies;  in intel_hpd_irq_storm_detect()
168 		hpd->stats[pin].count = 0;  in intel_hpd_irq_storm_detect()
171 	hpd->stats[pin].count += increment;  in intel_hpd_irq_storm_detect()
172 	if (hpd->stats[pin].count > threshold) {  in intel_hpd_irq_storm_detect()
173 		hpd->stats[pin].state = HPD_MARK_DISABLED;  in intel_hpd_irq_storm_detect()
174 		DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", pin);  in intel_hpd_irq_storm_detect()
177 		DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", pin,  in intel_hpd_irq_storm_detect()
178 			      hpd->stats[pin].count);  in intel_hpd_irq_storm_detect()
212 		DRM_INFO("HPD interrupt storm detected on connector %s: "  in intel_hpd_irq_storm_switch_to_polling()
260 					DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",  in intel_hpd_irq_storm_reenable_work()
342 			/* fall back to old school hpd */  in i915_digport_work_func()
382 	/* Enable polling for connectors which had HPD IRQ storms */  in i915_hotplug_work_func()
420 	/* Remove shared HPD pins that have changed */  in i915_hotplug_work_func()
436  * @pin_mask: a mask of hpd pins that have triggered the irq
437  * @long_mask: a mask of hpd pins that may be long hpd pulses
441  * decode the appropriate registers into bitmasks about hpd pins that have
484 		DRM_DEBUG_DRIVER("digital hpd port %c - %s\n", port_name(port),  in intel_hpd_irq_handler()
512 				  "Received HPD interrupt on pin %d although disabled\n", pin);  in intel_hpd_irq_handler()
560  * intel_hpd_init - initializes and enables hpd support
646  * intel_hpd_poll_init - enables/disables polling for connectors with hpd
650  * not they support hotplug detection. Under certain conditions HPD may not be
659  * Also see: intel_hpd_init(), which restores hpd handling.