i915: Add chip set ID param.

Signed-off-by: NKristian Høgsberg <krh@redhat.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/i915_dma.c

@@ -689,6 +689,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
 	case I915_PARAM_LAST_DISPATCH:
 		value = READ_BREADCRUMB(dev_priv);
 		break;
+	case I915_PARAM_CHIPSET_ID:
+		value = dev->pci_device;
+		break;
 	case I915_PARAM_HAS_GEM:
 		value = 1;
 		break;

include/drm/i915_drm.h

@@ -230,6 +230,7 @@ typedef struct drm_i915_irq_wait {
 #define I915_PARAM_IRQ_ACTIVE            1
 #define I915_PARAM_ALLOW_BATCHBUFFER     2
 #define I915_PARAM_LAST_DISPATCH         3
+#define I915_PARAM_CHIPSET_ID            4
 #define I915_PARAM_HAS_GEM               5
 
 typedef struct drm_i915_getparam {