SERR_INT
u32 serr_int = I915_READ(SERR_INT);
I915_WRITE(SERR_INT, serr_int);
I915_WRITE(SERR_INT, 0xffffffff);
uint32_t serr_int = I915_READ(SERR_INT);
I915_WRITE(SERR_INT, SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
POSTING_READ(SERR_INT);
I915_WRITE(SERR_INT,
if (old && I915_READ(SERR_INT) &