drm/i915: s/pm._irqs_disabled/pm.irqs_enabled/

Double negations just parse harder. Also this allows us to ditch some
init code since clearing to 0 dtrt. Also ditch the assignment in
intel_pm_setup, that's not redundant since we do the assignement now
while setting up interrupts.

While at it do engage in a bit of OCD and wrap up the few lines of
setup/teardown code into little helper functions: intel_irq_fini for
cleanup and intel_irq_init_hw for hw setup.

v2: Use _install/_uninstall for the new wrapper function names as
Paulo suggested.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_dma.c

@@ -1338,14 +1338,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
 	intel_power_domains_init_hw(dev_priv);
 
-	/*
-	 * We enable some interrupt sources in our postinstall hooks, so mark
-	 * interrupts as enabled _before_ actually enabling them to avoid
-	 * special cases in our ordering checks.
-	 */
-	dev_priv->pm._irqs_disabled = false;
-
-	ret = drm_irq_install(dev, dev->pdev->irq);
+	ret = intel_irq_install(dev_priv);
 	if (ret)
 		goto cleanup_gem_stolen;
 

drivers/gpu/drm/i915/i915_drv.h

@@ -1424,7 +1424,7 @@ struct ilk_wm_values {
  */
 struct i915_runtime_pm {
 	bool suspended;
-	bool _irqs_disabled;
+	bool irqs_enabled;
 };
 
 enum intel_pipe_crc_source {
@@ -2311,6 +2311,8 @@ void gen6_set_pm_mask(struct drm_i915_private *dev_priv, u32 pm_iir,
 							int new_delay);
 extern void intel_irq_init(struct drm_device *dev);
 extern void intel_hpd_init(struct drm_device *dev);
+int intel_irq_install(struct drm_i915_private *dev_priv);
+void intel_irq_uninstall(struct drm_i915_private *dev_priv);
 
 extern void intel_uncore_sanitize(struct drm_device *dev);
 extern void intel_uncore_early_sanitize(struct drm_device *dev,

drivers/gpu/drm/i915/i915_irq.c

@@ -4675,9 +4675,6 @@ void intel_irq_init(struct drm_device *dev)
 
 	pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
 
-	/* Haven't installed the IRQ handler yet */
-	dev_priv->pm._irqs_disabled = true;
-
 	if (IS_GEN2(dev)) {
 		dev->max_vblank_count = 0;
 		dev->driver->get_vblank_counter = i8xx_get_vblank_counter;
@@ -4786,13 +4783,32 @@ void intel_hpd_init(struct drm_device *dev)
 	spin_unlock_irq(&dev_priv->irq_lock);
 }
 
+int intel_irq_install(struct drm_i915_private *dev_priv)
+{
+	/*
+	 * We enable some interrupt sources in our postinstall hooks, so mark
+	 * interrupts as enabled _before_ actually enabling them to avoid
+	 * special cases in our ordering checks.
+	 */
+	dev_priv->pm.irqs_enabled = true;
+
+	return drm_irq_install(dev_priv->dev, dev_priv->dev->pdev->irq);
+}
+
+void intel_irq_uninstall(struct drm_i915_private *dev_priv)
+{
+	drm_irq_uninstall(dev_priv->dev);
+	intel_hpd_cancel_work(dev_priv);
+	dev_priv->pm.irqs_enabled = false;
+}
+
 /* Disable interrupts so we can allow runtime PM. */
 void intel_runtime_pm_disable_interrupts(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
 	dev->driver->irq_uninstall(dev);
-	dev_priv->pm._irqs_disabled = true;
+	dev_priv->pm.irqs_enabled = false;
 }
 
 /* Restore interrupts so we can recover from runtime PM. */
@@ -4800,7 +4816,7 @@ void intel_runtime_pm_restore_interrupts(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	dev_priv->pm._irqs_disabled = false;
+	dev_priv->pm.irqs_enabled = true;
 	dev->driver->irq_preinstall(dev);
 	dev->driver->irq_postinstall(dev);
 }

drivers/gpu/drm/i915/intel_display.c

@@ -13372,9 +13372,7 @@ void intel_modeset_cleanup(struct drm_device *dev)
 	 * Too much stuff here (turning of rps, connectors, ...) would
 	 * experience fancy races otherwise.
 	 */
-	drm_irq_uninstall(dev);
-	intel_hpd_cancel_work(dev_priv);
-	dev_priv->pm._irqs_disabled = true;
+	intel_irq_uninstall(dev_priv);
 
 	/*
 	 * Due to the hpd irq storm handling the hotplug work can re-arm the

drivers/gpu/drm/i915/intel_drv.h

@@ -772,7 +772,7 @@ static inline bool intel_irqs_enabled(struct drm_i915_private *dev_priv)
 	 * We only use drm_irq_uninstall() at unload and VT switch, so
 	 * this is the only thing we need to check.
 	 */
-	return !dev_priv->pm._irqs_disabled;
+	return dev_priv->pm.irqs_enabled;
 }
 
 int intel_get_crtc_scanline(struct intel_crtc *crtc);

drivers/gpu/drm/i915/intel_pm.c

@@ -6531,5 +6531,4 @@ void intel_pm_setup(struct drm_device *dev)
 			  intel_gen6_powersave_work);
 
 	dev_priv->pm.suspended = false;
-	dev_priv->pm._irqs_disabled = false;
 }