drm/i915: Flip the sense of AGPBUSY_DIS bit
My Gen3 Bspec lists the AGPBUSY# bit in INSTPM as an enable bit rather
than a disable bit. Our code has the opposite idea. Make the code match
the spec.
Might fix some gen3 C3 related interrupt delivery problems. Untested
due to lack of hardware.
v2: call it AGPBUSY_INT_EN to make it clearer it has to do with interrupts
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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 5122254..3427a7f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1179,7 +1179,7 @@
#define I915_ERROR_INSTRUCTION (1<<0)
#define INSTPM 0x020c0
#define INSTPM_SELF_EN (1<<12) /* 915GM only */
-#define INSTPM_AGPBUSY_DIS (1<<11) /* gen3: when disabled, pending interrupts
+#define INSTPM_AGPBUSY_INT_EN (1<<11) /* gen3: when disabled, pending interrupts
will not assert AGPBUSY# and will only
be delivered when out of C3. */
#define INSTPM_FORCE_ORDERING (1<<7) /* GEN6+ */