Attachment 57315 Details for Bug 45181 – enable readback w/a from ivb on gen6, too

[patch] enable readback w/a from ivb on gen6, too

0001-enable-the-readback-some-random-cs-reg-trick-on-gen6.patch (text/plain), 1008 bytes, created by Daniel Vetter on 2012-02-20 05:00:08 UTC

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Creator: Daniel Vetter

Created: 2012-02-20 05:00:08 UTC

Size: 1008 bytes

patch

obsolete

>From 25fc9c9c251b141a6caab519edfc0de10f8243c3 Mon Sep 17 00:00:00 2001
>From: Daniel Vetter <daniel.vetter@ffwll.ch>
>Date: Mon, 20 Feb 2012 13:58:46 +0100
>Subject: [PATCH] enable the readback-some-random-cs-reg trick on gen6, too
>
>I _so_ hope this isn't it.
>---
> drivers/gpu/drm/i915/intel_ringbuffer.c |    2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
>index ca3972f..f854d26 100644
>--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
>+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
>@@ -626,7 +626,7 @@ gen6_ring_get_seqno(struct intel_ring_buffer *ring)
> 	/* Workaround to force correct ordering between irq and seqno writes on
> 	 * ivb (and maybe also on snb) by reading from a CS register (like
> 	 * ACTHD) before reading the status page. */
>-	if (IS_GEN7(dev))
>+	if (IS_GEN7(dev) || IS_GEN6(dev))
> 		intel_ring_get_active_head(ring);
> 	return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
> }
>-- 
>1.7.9
>

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Attachments on bug 45181: 56088 | 56108 | 57315 | 57317

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