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Commit fad2596a authored by Daniel Vetter's avatar Daniel Vetter
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drm/i915: rip out old HWSTAM missed irq WA for vlv 



This got copy-pasted from an older version. The newer kinds of
workarounds don't need this anymore.

Shame on me for not noticing when picking up the vlv irq patch.

Reviewed-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 25c06300

drivers/gpu/drm/i915/i915_irq.c

+0 −12
Original line number Diff line number Diff line
@@ -1998,18 +1998,6 @@ static void valleyview_irq_preinstall(struct drm_device *dev) 
	I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);

	I915_WRITE(RING_IMR(BLT_RING_BASE), 0);



	if (IS_GEN6(dev) || IS_GEN7(dev)) {

		/* Workaround stalls observed on Sandy Bridge GPUs by

		 * making the blitter command streamer generate a

		 * write to the Hardware Status Page for

		 * MI_USER_INTERRUPT.  This appears to serialize the

		 * previous seqno write out before the interrupt

		 * happens.

		 */

		I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT);

		I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT);

	}



	/* and GT */

	I915_WRITE(GTIIR, I915_READ(GTIIR));

	I915_WRITE(GTIIR, I915_READ(GTIIR));