drm/i915: Store a i915 backpointer from engine, and use it

   text	   data	    bss	    dec	    hex	filename
6309351	3578714	 696320	10584385	 a18141	vmlinux
6308391	3578714	 696320	10583425	 a17d81	vmlinux

Almost 1KiB of code reduction.

v2: More s/INTEL_INFO()->gen/INTEL_GEN()/ and IS_GENx() conversions

   text	   data	    bss	    dec	    hex	filename
6304579	3578778	 696320	10579677	 a16edd	vmlinux
6303427	3578778	 696320	10578525	 a16a5d	vmlinux

Now over 1KiB!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1462545621-30125-3-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index aa58ecc..a8f5d03 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3144,28 +3144,26 @@
 	}
 }
 
-void intel_prepare_reset(struct drm_device *dev)
+void intel_prepare_reset(struct drm_i915_private *dev_priv)
 {
 	/* no reset support for gen2 */
-	if (IS_GEN2(dev))
+	if (IS_GEN2(dev_priv))
 		return;
 
 	/* reset doesn't touch the display */
-	if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
+	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
 		return;
 
-	drm_modeset_lock_all(dev);
+	drm_modeset_lock_all(dev_priv->dev);
 	/*
 	 * Disabling the crtcs gracefully seems nicer. Also the
 	 * g33 docs say we should at least disable all the planes.
 	 */
-	intel_display_suspend(dev);
+	intel_display_suspend(dev_priv->dev);
 }
 
-void intel_finish_reset(struct drm_device *dev)
+void intel_finish_reset(struct drm_i915_private *dev_priv)
 {
-	struct drm_i915_private *dev_priv = to_i915(dev);
-
 	/*
 	 * Flips in the rings will be nuked by the reset,
 	 * so complete all pending flips so that user space
@@ -3174,11 +3172,11 @@
 	intel_complete_page_flips(dev_priv);
 
 	/* no reset support for gen2 */
-	if (IS_GEN2(dev))
+	if (IS_GEN2(dev_priv))
 		return;
 
 	/* reset doesn't touch the display */
-	if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev)) {
+	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv)) {
 		/*
 		 * Flips in the rings have been nuked by the reset,
 		 * so update the base address of all primary
@@ -3188,7 +3186,7 @@
 		 * FIXME: Atomic will make this obsolete since we won't schedule
 		 * CS-based flips (which might get lost in gpu resets) any more.
 		 */
-		intel_update_primary_planes(dev);
+		intel_update_primary_planes(dev_priv->dev);
 		return;
 	}
 
@@ -3199,18 +3197,18 @@
 	intel_runtime_pm_disable_interrupts(dev_priv);
 	intel_runtime_pm_enable_interrupts(dev_priv);
 
-	intel_modeset_init_hw(dev);
+	intel_modeset_init_hw(dev_priv->dev);
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	if (dev_priv->display.hpd_irq_setup)
 		dev_priv->display.hpd_irq_setup(dev_priv);
 	spin_unlock_irq(&dev_priv->irq_lock);
 
-	intel_display_resume(dev);
+	intel_display_resume(dev_priv->dev);
 
 	intel_hpd_init(dev_priv);
 
-	drm_modeset_unlock_all(dev);
+	drm_modeset_unlock_all(dev_priv->dev);
 }
 
 static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
@@ -11255,7 +11253,7 @@
 	if (engine == NULL)
 		return true;
 
-	if (INTEL_INFO(engine->dev)->gen < 5)
+	if (INTEL_GEN(engine->i915) < 5)
 		return false;
 
 	if (i915.use_mmio_flip < 0)
@@ -16187,9 +16185,8 @@
 };
 
 struct intel_display_error_state *
-intel_display_capture_error_state(struct drm_device *dev)
+intel_display_capture_error_state(struct drm_i915_private *dev_priv)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_display_error_state *error;
 	int transcoders[] = {
 		TRANSCODER_A,
@@ -16199,14 +16196,14 @@
 	};
 	int i;
 
-	if (INTEL_INFO(dev)->num_pipes == 0)
+	if (INTEL_INFO(dev_priv)->num_pipes == 0)
 		return NULL;
 
 	error = kzalloc(sizeof(*error), GFP_ATOMIC);
 	if (error == NULL)
 		return NULL;
 
-	if (IS_HASWELL(dev) || IS_BROADWELL(dev))
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
 		error->power_well_driver = I915_READ(HSW_PWR_WELL_DRIVER);
 
 	for_each_pipe(dev_priv, i) {
@@ -16222,25 +16219,25 @@
 
 		error->plane[i].control = I915_READ(DSPCNTR(i));
 		error->plane[i].stride = I915_READ(DSPSTRIDE(i));
-		if (INTEL_INFO(dev)->gen <= 3) {
+		if (INTEL_GEN(dev_priv) <= 3) {
 			error->plane[i].size = I915_READ(DSPSIZE(i));
 			error->plane[i].pos = I915_READ(DSPPOS(i));
 		}
-		if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
+		if (INTEL_GEN(dev_priv) <= 7 && !IS_HASWELL(dev_priv))
 			error->plane[i].addr = I915_READ(DSPADDR(i));
-		if (INTEL_INFO(dev)->gen >= 4) {
+		if (INTEL_GEN(dev_priv) >= 4) {
 			error->plane[i].surface = I915_READ(DSPSURF(i));
 			error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
 		}
 
 		error->pipe[i].source = I915_READ(PIPESRC(i));
 
-		if (HAS_GMCH_DISPLAY(dev))
+		if (HAS_GMCH_DISPLAY(dev_priv))
 			error->pipe[i].stat = I915_READ(PIPESTAT(i));
 	}
 
 	/* Note: this does not include DSI transcoders. */
-	error->num_transcoders = INTEL_INFO(dev)->num_pipes;
+	error->num_transcoders = INTEL_INFO(dev_priv)->num_pipes;
 	if (HAS_DDI(dev_priv))
 		error->num_transcoders++; /* Account for eDP. */