[PATCH] drm/i915/irq: duplicate HAS_FBC() for irq error mask usage

[Jani Nikula <jani.nikula@intel.com>]

The error irq handling needs to mask page table errors on gen 2/3 with
FBC. See commit e7e12f6ec8bf ("drm/i915: Mask page table errors on
gen2/3 with FBC") for details.

We want to avoid using display feature checks in i915 core code. Since
FBC can't be fused off on gen 2/3, just list the platforms that support
FBC. Add a macro purely for making the code self-documenting.

With this, we can drop the intel_display_core.h include, and make struct
intel_display opaque inside i915_irq.c.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 11a727b74849..e0a0bd687f1b 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -33,7 +33,6 @@
 
 #include <drm/drm_drv.h>
 
-#include "display/intel_display_core.h"
 #include "display/intel_display_irq.h"
 #include "display/intel_hotplug.h"
 #include "display/intel_hotplug_irq.h"
@@ -794,9 +793,10 @@ static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv)
 	intel_uncore_posting_read(&dev_priv->uncore, GEN8_MASTER_IRQ);
 }
 
+#define I9XX_HAS_FBC(i915) (IS_I85X(i915) || IS_I865G(i915) || IS_I915GM(i915) || IS_I945GM(i915))
+
 static u32 i9xx_error_mask(struct drm_i915_private *i915)
 {
-	struct intel_display *display = i915->display;
 	/*
 	 * On gen2/3 FBC generates (seemingly spurious)
 	 * display INVALID_GTT/INVALID_GTT_PTE table errors.
@@ -809,7 +809,7 @@ static u32 i9xx_error_mask(struct drm_i915_private *i915)
 	 * Unfortunately we can't mask off individual PGTBL_ER bits,
 	 * so we just have to mask off all page table errors via EMR.
 	 */
-	if (HAS_FBC(display))
+	if (I9XX_HAS_FBC(i915))
 		return I915_ERROR_MEMORY_REFRESH;
 	else
 		return I915_ERROR_PAGE_TABLE |
-- 
2.47.3