i915: Add chip set ID param.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/i915_dma.c

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index f167ff6..ea85d71 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -689,6 +689,9 @@
 	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

diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 59d08fc..eb4b350 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -230,6 +230,7 @@
 #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 {