drm/xe/irq: Move ASLE backlight interrupt logic

Our only use of GUnit interrupts is to handle ASLE backlight operations
that are reported as GUnit GSE interrupts.  Move the enable/disable of
these interrupts to a more sensible place, in the same area where we
expect display interrupt code to be added by future patches.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230601215244.678611-23-matthew.d.roper@intel.comSigned-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_irq.c

@@ -186,8 +186,6 @@ static void xelp_irq_postinstall(struct xe_device *xe, struct xe_tile *tile)
 
 	gt_irq_postinstall(tile);
 
-	unmask_and_enable(tile, GU_MISC_IRQ_OFFSET, GU_MISC_GSE);
-
 	xelp_intr_enable(xe, true);
 }
 
@@ -367,8 +365,6 @@ static void dg1_irq_postinstall(struct xe_device *xe, struct xe_tile *tile)
 {
 	gt_irq_postinstall(tile);
 
-	unmask_and_enable(tile, GU_MISC_IRQ_OFFSET, GU_MISC_GSE);
-
 	if (tile->id == 0)
 		dg1_intr_enable(xe, true);
 }
@@ -478,7 +474,6 @@ static void xelp_irq_reset(struct xe_tile *tile)
 
 	gt_irq_reset(tile);
 
-	mask_and_disable(tile, GU_MISC_IRQ_OFFSET);
 	mask_and_disable(tile, PCU_IRQ_OFFSET);
 }
 
@@ -489,7 +484,6 @@ static void dg1_irq_reset(struct xe_tile *tile)
 
 	gt_irq_reset(tile);
 
-	mask_and_disable(tile, GU_MISC_IRQ_OFFSET);
 	mask_and_disable(tile, PCU_IRQ_OFFSET);
 }
 
@@ -504,6 +498,9 @@ static void xe_irq_reset(struct xe_device *xe)
 		else
 			xelp_irq_reset(tile);
 	}
+
+	tile = xe_device_get_root_tile(xe);
+	mask_and_disable(tile, GU_MISC_IRQ_OFFSET);
 }
 
 void xe_gt_irq_postinstall(struct xe_tile *tile)
@@ -523,6 +520,13 @@ static void xe_irq_postinstall(struct xe_device *xe)
 
 	for_each_tile(tile, xe, id)
 		xe_gt_irq_postinstall(tile);
+
+	/*
+	 * ASLE backlight operations are reported via GUnit GSE interrupts
+	 * on the root tile.
+	 */
+	unmask_and_enable(xe_device_get_root_tile(xe),
+			  GU_MISC_IRQ_OFFSET, GU_MISC_GSE);
 }
 
 static irq_handler_t xe_irq_handler(struct xe_device *xe)