This is a note to let you know that I've just added the patch titled
drm/i915: Apply HWSTAM workaround for BSD ring on
to the 2.6.39-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-apply-hwstam-workaround-for-bsd-ring-on.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@kernel.org> know about it.
>From ec6a890dfed7dd245beba5e5bcdfcffbd934c284 Mon Sep 17 00:00:00 2001
From: Chris Wilson <ch...@chris-wilson.co.uk>
Date: Tue, 21 Jun 2011 18:37:59 +0100
Subject: drm/i915: Apply HWSTAM workaround for BSD ring on
SandyBridge
From: Chris Wilson <ch...@chris-wilson.co.uk>
commit ec6a890dfed7dd245beba5e5bcdfcffbd934c284 upstream.
...we need to apply exactly the same workaround for missing interrupts
from BSD as for the BLT ring, apparently.
See also commit 498e720b96379d8ee9c294950a01534a73defcf3
(drm/i915: Fix gen6 (SNB) missed BLT ring interrupts).
Reported-and-tested-by: nkalk...@web.de
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38529
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Signed-off-by: Keith Packard <kei...@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
drivers/gpu/drm/i915/i915_irq.c | 1 +
drivers/gpu/drm/i915/i915_reg.h | 1 +
2 files changed, 2 insertions(+)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1576,6 +1576,7 @@ static void ironlake_irq_preinstall(stru
* happens.
*/
I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT);
+ I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT);
}
/* XXX hotplug from PCH */
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -528,6 +528,7 @@
#define GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_ENABLE 0
#define GEN6_BSD_SLEEP_PSMI_CONTROL_IDLE_INDICATOR (1 << 3)
+#define GEN6_BSD_HWSTAM 0x12098
#define GEN6_BSD_IMR 0x120a8
#define GEN6_BSD_USER_INTERRUPT (1 << 12)
Patches currently in stable-queue which might be from ch...@chris-wilson.co.uk
are
queue-2.6.39/drm-i915-fix-gen6-snb-missed-blt-ring-interrupts.patch
queue-2.6.39/drm-i915-apply-hwstam-workaround-for-bsd-ring-on.patch
queue-2.6.39/revert-drm-i915-enable-gmbus-for-post-gen2-chipsets.patch
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