drm/i915: Introduce i915_vgacntrl_reg()
The VGACNTRL register has moved around between different platforms.
To handle the differences add i915_vgacntrl_reg() which returns the
correct offset for the VGACNTRL register.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9a3cd04..e2b592a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3238,6 +3238,8 @@
# define VGA_2X_MODE (1 << 30)
# define VGA_PIPE_B_SELECT (1 << 29)
+#define VLV_VGACNTRL (VLV_DISPLAY_BASE + 0x71400)
+
/* Ironlake */
#define CPU_VGACNTRL 0x41000
