drm/i915: Rename graphics reset registers.

The graphics domains are listed as GRDOM in the documentation, and the
GDRST PCI config register (0xc0) is only valid on I965 and GM45.  Newer
chips (like Sandy Bridge) have a different GDRST.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_drv.c

@@ -330,7 +330,7 @@ int i915_resume(struct drm_device *dev)
 static int i965_reset_complete(struct drm_device *dev)
 {
 	u8 gdrst;
-	pci_read_config_byte(dev->pdev, GDRST, &gdrst);
+	pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
 	return gdrst & 0x1;
 }
 
@@ -375,8 +375,8 @@ int i965_reset(struct drm_device *dev, u8 flags)
 	 * well as the reset bit (GR/bit 0).  Setting the GR bit
 	 * triggers the reset; when done, the hardware will clear it.
 	 */
-	pci_read_config_byte(dev->pdev, GDRST, &gdrst);
-	pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | 0x1);
+	pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
+	pci_write_config_byte(dev->pdev, I965_GDRST, gdrst | flags | 0x1);
 
 	/* Wait for the hardware to reset (but no more than 500 ms) */
 	if (wait_for(i965_reset_complete(dev), 500)) {

drivers/gpu/drm/i915/i915_irq.c

@@ -401,7 +401,7 @@ static void i915_error_work_func(struct work_struct *work)
 		case 4:
 			DRM_DEBUG_DRIVER("resetting chip\n");
 			kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
-			if (!i965_reset(dev, GDRST_RENDER)) {
+			if (!i965_reset(dev, GRDOM_RENDER)) {
 				atomic_set(&dev_priv->mm.wedged, 0);
 				kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
 			}

drivers/gpu/drm/i915/i915_reg.h

@@ -108,10 +108,12 @@
 #define   I915_GC_RENDER_CLOCK_200_MHZ	(1 << 0)
 #define   I915_GC_RENDER_CLOCK_333_MHZ	(4 << 0)
 #define LBB	0xf4
-#define GDRST 0xc0
-#define  GDRST_FULL	(0<<2)
-#define  GDRST_RENDER	(1<<2)
-#define  GDRST_MEDIA	(3<<2)
+
+/* Graphics reset regs */
+#define I965_GDRST 0xc0
+#define  GRDOM_FULL	(0<<2)
+#define  GRDOM_RENDER	(1<<2)
+#define  GRDOM_MEDIA	(3<<2)
 
 /* VGA stuff */