drm/i915: Report all GTFIFODBG errors

On VLV GTFIFODBG has more bits. Just report them all.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_reg.h

@@ -4857,7 +4857,10 @@
 #define    FORCEWAKE_MT_ENABLE			(1<<5)
 
 #define  GTFIFODBG				0x120000
-#define    GT_FIFO_CPU_ERROR_MASK		7
+#define    GT_FIFO_SBDROPERR			(1<<6)
+#define    GT_FIFO_BLOBDROPERR			(1<<5)
+#define    GT_FIFO_SB_READ_ABORTERR		(1<<4)
+#define    GT_FIFO_DROPERR			(1<<3)
 #define    GT_FIFO_OVFERR			(1<<2)
 #define    GT_FIFO_IAWRERR			(1<<1)
 #define    GT_FIFO_IARDERR			(1<<0)

drivers/gpu/drm/i915/intel_uncore.c

@@ -123,9 +123,8 @@ static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
 	u32 gtfifodbg;
 
 	gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
-	if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK,
-	     "MMIO read or write has been dropped %x\n", gtfifodbg))
-		__raw_i915_write32(dev_priv, GTFIFODBG, GT_FIFO_CPU_ERROR_MASK);
+	if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
+		__raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
 }
 
 static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,