drm/i915: move generic hotplug code into new intel_hotplug.c file

We have enough generic hotplug functions sprinkled all over i915_irq.c
to warrant moving them to a file of their own. This should further
underline the distinction between generic code in the new file and
platform specific hotplug and irq code that remains in i915_irq.c.

Add new intel_hpd_init_work to keep work functions static, and rename
get_port_from_pin to intel_hpd_pin_to_port while increasing its
visibility, but keep everything else the same.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/Makefile

@@ -34,6 +34,7 @@ i915-y += i915_cmd_parser.o \
 	  i915_gpu_error.o \
 	  i915_irq.o \
 	  i915_trace_points.o \
+	  intel_hotplug.o \
 	  intel_lrc.o \
 	  intel_ringbuffer.o \
 	  intel_uncore.o

drivers/gpu/drm/i915/i915_drv.c

@@ -541,21 +541,6 @@ bool i915_semaphore_is_enabled(struct drm_device *dev)
 	return true;
 }
 
-void intel_hpd_cancel_work(struct drm_i915_private *dev_priv)
-{
-	spin_lock_irq(&dev_priv->irq_lock);
-
-	dev_priv->hotplug.long_port_mask = 0;
-	dev_priv->hotplug.short_port_mask = 0;
-	dev_priv->hotplug.event_bits = 0;
-
-	spin_unlock_irq(&dev_priv->irq_lock);
-
-	cancel_work_sync(&dev_priv->hotplug.dig_port_work);
-	cancel_work_sync(&dev_priv->hotplug.hotplug_work);
-	cancel_delayed_work_sync(&dev_priv->hotplug.reenable_work);
-}
-
 void i915_firmware_load_error_print(const char *fw_path, int err)
 {
 	DRM_ERROR("failed to load firmware %s (%d)\n", fw_path, err);

drivers/gpu/drm/i915/i915_drv.h

@@ -2601,9 +2601,15 @@ extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
 extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);
 extern void i915_update_gfx_val(struct drm_i915_private *dev_priv);
 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool on);
-void intel_hpd_cancel_work(struct drm_i915_private *dev_priv);
 void i915_firmware_load_error_print(const char *fw_path, int err);
 
+/* intel_hotplug.c */
+void intel_hpd_irq_handler(struct drm_device *dev, u32 pin_mask, u32 long_mask);
+void intel_hpd_init(struct drm_i915_private *dev_priv);
+void intel_hpd_init_work(struct drm_i915_private *dev_priv);
+void intel_hpd_cancel_work(struct drm_i915_private *dev_priv);
+enum port intel_hpd_pin_to_port(enum hpd_pin pin);
+
 /* i915_irq.c */
 void i915_queue_hangcheck(struct drm_device *dev);
 __printf(3, 4)
@@ -2611,7 +2617,6 @@ void i915_handle_error(struct drm_device *dev, bool wedged,
 		       const char *fmt, ...);
 
 extern void intel_irq_init(struct drm_i915_private *dev_priv);
-extern void intel_hpd_init(struct drm_i915_private *dev_priv);
 int intel_irq_install(struct drm_i915_private *dev_priv);
 void intel_irq_uninstall(struct drm_i915_private *dev_priv);