DSPCNTR
WARN_ON(I915_READ(DSPCNTR(PLANE_A)) & DISPLAY_PLANE_ENABLE);
WARN_ON(I915_READ(DSPCNTR(PLANE_B)) & DISPLAY_PLANE_ENABLE);
WARN_ON(I915_READ(DSPCNTR(PLANE_C)) & DISPLAY_PLANE_ENABLE);
error->plane[i].control = I915_READ(DSPCNTR(i));
i915_reg_t reg = DSPCNTR(i9xx_plane);
I915_WRITE_FW(DSPCNTR(i9xx_plane), 0);
POSTING_READ_FW(DSPCNTR(i9xx_plane));
val = I915_READ(DSPCNTR(i9xx_plane));
val = I915_READ(DSPCNTR(i9xx_plane));
I915_WRITE(DSPCNTR(pipe),
I915_READ(DSPCNTR(pipe)) |
val = I915_READ(DSPCNTR(i9xx_plane));