This is a note to let you know that I've just added the patch titled
drm/i915: Force the CS stall for invalidate flushes
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-force-the-cs-stall-for-invalidate-flushes.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From add284a3a2481e759d6bec35f6444c32c8ddc383 Mon Sep 17 00:00:00 2001
From: Chris Wilson <[email protected]>
Date: Tue, 16 Dec 2014 08:44:32 +0000
Subject: drm/i915: Force the CS stall for invalidate flushes
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From: Chris Wilson <[email protected]>
commit add284a3a2481e759d6bec35f6444c32c8ddc383 upstream.
In order to act as a full command barrier by itself, we need to tell the
pipecontrol to actually stall the command streamer while the flush runs.
We require the full command barrier before operations like
MI_SET_CONTEXT, which currently rely on a prior invalidate flush.
References: https://bugs.freedesktop.org/show_bug.cgi?id=83677
Cc: Simon Farnsworth <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Signed-off-by: Chris Wilson <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/i915/intel_ringbuffer.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -369,6 +369,8 @@ gen7_render_ring_flush(struct intel_engi
flags |= PIPE_CONTROL_QW_WRITE;
flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;
+ flags |= PIPE_CONTROL_STALL_AT_SCOREBOARD;
+
/* Workaround: we must issue a pipe_control with CS-stall bit
* set before a pipe_control command that has the state cache
* invalidate bit set. */
Patches currently in stable-queue which might be from [email protected]
are
queue-3.18/drm-i915-invalidate-media-caches-on-gen7.patch
queue-3.18/drm-i915-disable-psmi-sleep-messages-on-all-rings-around-context-switches.patch
queue-3.18/drm-i915-only-warn-the-first-time-we-attempt-to-mmio-whilst-suspended.patch
queue-3.18/drm-i915-disallow-pin-ioctl-completely-for-kms-drivers.patch
queue-3.18/drm-i915-don-t-complain-about-stolen-conflicts-on-gen3.patch
queue-3.18/drm-i915-don-t-call-intel_prepare_page_flip-multiple-times-on-gen2-4.patch
queue-3.18/drm-i915-force-the-cs-stall-for-invalidate-flushes.patch
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